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zig/src/link.cpp
Andrew Kelley ce76de35f1
multi-arch glibc headers
2019-03-07 12:16:10 -05:00

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57 KiB
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/*
* Copyright (c) 2015 Andrew Kelley
*
* This file is part of zig, which is MIT licensed.
* See http://opensource.org/licenses/MIT
*/
#include "os.hpp"
#include "config.h"
#include "codegen.hpp"
#include "analyze.hpp"
#include "compiler.hpp"
struct LinkJob {
CodeGen *codegen;
ZigList<const char *> args;
bool link_in_crt;
HashMap<Buf *, bool, buf_hash, buf_eql_buf> rpath_table;
};
static CodeGen *create_child_codegen(CodeGen *parent_gen, Buf *root_src_path, OutType out_type,
ZigLibCInstallation *libc)
{
CodeGen *child_gen = codegen_create(nullptr, root_src_path, parent_gen->zig_target, out_type,
parent_gen->build_mode, parent_gen->zig_lib_dir, parent_gen->zig_std_dir, libc, get_stage1_cache_path());
child_gen->out_h_path = nullptr;
child_gen->verbose_tokenize = parent_gen->verbose_tokenize;
child_gen->verbose_ast = parent_gen->verbose_ast;
child_gen->verbose_link = parent_gen->verbose_link;
child_gen->verbose_ir = parent_gen->verbose_ir;
child_gen->verbose_llvm_ir = parent_gen->verbose_llvm_ir;
child_gen->verbose_cimport = parent_gen->verbose_cimport;
child_gen->verbose_cc = parent_gen->verbose_cc;
child_gen->llvm_argv = parent_gen->llvm_argv;
codegen_set_strip(child_gen, parent_gen->strip_debug_symbols);
child_gen->disable_pic = parent_gen->disable_pic;
child_gen->valgrind_support = ValgrindSupportDisabled;
codegen_set_errmsg_color(child_gen, parent_gen->err_color);
codegen_set_mmacosx_version_min(child_gen, parent_gen->mmacosx_version_min);
codegen_set_mios_version_min(child_gen, parent_gen->mios_version_min);
child_gen->enable_cache = true;
return child_gen;
}
static bool target_is_glibc(CodeGen *g) {
return g->zig_target->os == OsLinux && target_abi_is_gnu(g->zig_target->abi);
}
static const char *build_libc_object(CodeGen *parent_gen, const char *name, CFile *c_file) {
CodeGen *child_gen = create_child_codegen(parent_gen, nullptr, OutTypeObj, nullptr);
codegen_set_out_name(child_gen, buf_create_from_str(name));
ZigList<CFile *> c_source_files = {0};
c_source_files.append(c_file);
child_gen->c_source_files = c_source_files;
codegen_build_and_link(child_gen);
return buf_ptr(&child_gen->output_file_path);
}
static const char *path_from_zig_lib(CodeGen *g, const char *dir, const char *subpath) {
Buf *dir1 = buf_alloc();
os_path_join(g->zig_lib_dir, buf_create_from_str(dir), dir1);
Buf *result = buf_alloc();
os_path_join(dir1, buf_create_from_str(subpath), result);
return buf_ptr(result);
}
static const char *path_from_libc(CodeGen *g, const char *subpath) {
return path_from_zig_lib(g, "libc", subpath);
}
static const char *path_from_libunwind(CodeGen *g, const char *subpath) {
return path_from_zig_lib(g, "libunwind", subpath);
}
static const char *build_dummy_so(CodeGen *parent, const char *name, size_t major_version) {
Buf *glibc_dummy_root_src = buf_sprintf("%s" OS_SEP "libc" OS_SEP "dummy" OS_SEP "%s.zig",
buf_ptr(parent->zig_lib_dir), name);
CodeGen *child_gen = create_child_codegen(parent, glibc_dummy_root_src, OutTypeLib, nullptr);
codegen_set_out_name(child_gen, buf_create_from_str(name));
codegen_set_lib_version(child_gen, major_version, 0, 0);
child_gen->is_static = false;
child_gen->is_dummy_so = true;
codegen_build_and_link(child_gen);
return buf_ptr(&child_gen->output_file_path);
}
static const char *build_libunwind(CodeGen *parent) {
CodeGen *child_gen = create_child_codegen(parent, nullptr, OutTypeLib, nullptr);
codegen_set_out_name(child_gen, buf_create_from_str("unwind"));
child_gen->is_static = true;
LinkLib *new_link_lib = codegen_add_link_lib(child_gen, buf_create_from_str("c"));
new_link_lib->provided_explicitly = false;
enum SrcKind {
SrcCpp,
SrcC,
SrcAsm,
};
static const struct {
const char *path;
SrcKind kind;
} unwind_src[] = {
{"src" OS_SEP "libunwind.cpp", SrcCpp},
{"src" OS_SEP "Unwind-EHABI.cpp", SrcCpp},
{"src" OS_SEP "Unwind-seh.cpp", SrcCpp},
{"src" OS_SEP "UnwindLevel1.c", SrcC},
{"src" OS_SEP "UnwindLevel1-gcc-ext.c", SrcC},
{"src" OS_SEP "Unwind-sjlj.c", SrcC},
{"src" OS_SEP "UnwindRegistersRestore.S", SrcAsm},
{"src" OS_SEP "UnwindRegistersSave.S", SrcAsm},
};
ZigList<CFile *> c_source_files = {0};
for (size_t i = 0; i < array_length(unwind_src); i += 1) {
CFile *c_file = allocate<CFile>(1);
c_file->source_path = path_from_libunwind(parent, unwind_src[i].path);
switch (unwind_src[i].kind) {
case SrcC:
c_file->args.append("-std=c99");
break;
case SrcCpp:
c_file->args.append("-fno-rtti");
c_file->args.append("-I");
c_file->args.append(path_from_zig_lib(parent, "libcxx", "include"));
break;
case SrcAsm:
break;
}
c_file->args.append("-I");
c_file->args.append(path_from_libunwind(parent, "include"));
c_file->args.append("-fPIC");
c_file->args.append("-D_LIBUNWIND_DISABLE_VISIBILITY_ANNOTATIONS");
if (parent->zig_target->is_native) {
c_file->args.append("-D_LIBUNWIND_IS_NATIVE_ONLY");
}
if (parent->build_mode == BuildModeDebug) {
c_file->args.append("-D_DEBUG");
} else {
c_file->args.append("-NDEBUG");
}
if (parent->is_single_threaded) {
c_file->args.append("-D_LIBUNWIND_HAS_NO_THREADS");
}
c_source_files.append(c_file);
}
child_gen->c_source_files = c_source_files;
codegen_build_and_link(child_gen);
return buf_ptr(&child_gen->output_file_path);
}
static void glibc_add_include_dirs_arch(CFile *c_file, ZigLLVM_ArchType arch, const char *nptl, const char *dir) {
bool is_x86 = arch == ZigLLVM_x86 || arch == ZigLLVM_x86_64;
bool is_aarch64 = arch == ZigLLVM_aarch64 || arch == ZigLLVM_aarch64_be;
bool is_mips = arch == ZigLLVM_mips || arch == ZigLLVM_mipsel ||
arch == ZigLLVM_mips64el || arch == ZigLLVM_mips64;
bool is_arm = arch == ZigLLVM_arm || arch == ZigLLVM_armeb;
bool is_ppc = arch == ZigLLVM_ppc || arch == ZigLLVM_ppc64 || arch == ZigLLVM_ppc64le;
bool is_riscv = arch == ZigLLVM_riscv32 || arch == ZigLLVM_riscv64;
bool is_sparc = arch == ZigLLVM_sparc || arch == ZigLLVM_sparcel || arch == ZigLLVM_sparcv9;
bool is_64 = target_arch_pointer_bit_width(arch) == 64;
if (is_x86) {
if (arch == ZigLLVM_x86_64) {
if (nptl != nullptr) {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "x86_64" OS_SEP "%s", dir, nptl)));
} else {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "x86_64", dir)));
}
} else if (arch == ZigLLVM_x86) {
if (nptl != nullptr) {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "i386" OS_SEP "%s", dir, nptl)));
} else {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "i386", dir)));
}
}
if (nptl != nullptr) {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "x86" OS_SEP "%s", dir, nptl)));
} else {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "x86", dir)));
}
} else if (is_arm) {
if (nptl != nullptr) {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "arm" OS_SEP "%s", dir, nptl)));
} else {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "arm", dir)));
}
} else if (is_mips) {
if (nptl != nullptr) {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "mips" OS_SEP "%s", dir, nptl)));
} else {
if (is_64) {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "mips" OS_SEP "mips64", dir)));
} else {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "mips" OS_SEP "mips32", dir)));
}
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "mips", dir)));
}
} else if (is_sparc) {
if (nptl != nullptr) {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "sparc" OS_SEP "%s", dir, nptl)));
} else {
if (is_64) {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "sparc" OS_SEP "sparc64", dir)));
} else {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "sparc" OS_SEP "sparc32", dir)));
}
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "sparc", dir)));
}
} else if (is_aarch64) {
if (nptl != nullptr) {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "aarch64" OS_SEP "%s", dir, nptl)));
} else {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "aarch64", dir)));
}
} else if (is_ppc) {
if (nptl != nullptr) {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "powerpc" OS_SEP "%s", dir, nptl)));
} else {
if (is_64) {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "powerpc" OS_SEP "powerpc64", dir)));
} else {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "powerpc" OS_SEP "powerpc32", dir)));
}
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "powerpc", dir)));
}
} else if (is_riscv) {
if (nptl != nullptr) {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "riscv" OS_SEP "%s", dir, nptl)));
} else {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "riscv", dir)));
}
}
}
static void glibc_add_include_dirs(CodeGen *parent, CFile *c_file) {
ZigLLVM_ArchType arch = parent->zig_target->arch;
const char *nptl = (parent->zig_target->os == OsLinux) ? "nptl" : "htl";
const char *glibc = path_from_libc(parent, "glibc");
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "include", glibc)));
if (parent->zig_target->os == OsLinux) {
glibc_add_include_dirs_arch(c_file, arch, nullptr,
path_from_libc(parent, "glibc" OS_SEP "sysdeps" OS_SEP "unix" OS_SEP "sysv" OS_SEP "linux"));
}
if (nptl != nullptr) {
glibc_add_include_dirs_arch(c_file, arch, nptl, path_from_libc(parent, "glibc" OS_SEP "sysdeps"));
}
if (parent->zig_target->os == OsLinux) {
c_file->args.append("-I");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "sysdeps" OS_SEP
"unix" OS_SEP "sysv" OS_SEP "linux" OS_SEP "include"));
c_file->args.append("-I");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "sysdeps" OS_SEP
"unix" OS_SEP "sysv" OS_SEP "linux"));
}
if (nptl != nullptr) {
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "sysdeps" OS_SEP "%s", glibc, nptl)));
}
c_file->args.append("-I");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "sysdeps" OS_SEP "pthread"));
c_file->args.append("-I");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "sysdeps" OS_SEP "unix" OS_SEP "sysv"));
glibc_add_include_dirs_arch(c_file, arch, nullptr,
path_from_libc(parent, "glibc" OS_SEP "sysdeps" OS_SEP "unix"));
c_file->args.append("-I");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "sysdeps" OS_SEP "unix"));
glibc_add_include_dirs_arch(c_file, arch, nullptr, path_from_libc(parent, "glibc" OS_SEP "sysdeps"));
c_file->args.append("-I");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "sysdeps" OS_SEP "generic"));
c_file->args.append("-I");
c_file->args.append(path_from_libc(parent, "glibc"));
c_file->args.append("-I");
c_file->args.append(buf_ptr(buf_sprintf("%s" OS_SEP "libc" OS_SEP "include" OS_SEP "%s-%s-%s",
buf_ptr(parent->zig_lib_dir), target_arch_name(parent->zig_target->arch),
target_os_name(parent->zig_target->os), target_abi_name(parent->zig_target->abi))));
c_file->args.append("-I");
c_file->args.append(path_from_libc(parent, "include" OS_SEP "generic-glibc"));
}
static const char *glibc_start_asm_path(CodeGen *parent, const char *file) {
ZigLLVM_ArchType arch = parent->zig_target->arch;
bool is_aarch64 = arch == ZigLLVM_aarch64 || arch == ZigLLVM_aarch64_be;
bool is_mips = arch == ZigLLVM_mips || arch == ZigLLVM_mipsel ||
arch == ZigLLVM_mips64el || arch == ZigLLVM_mips64;
bool is_arm = arch == ZigLLVM_arm || arch == ZigLLVM_armeb;
bool is_ppc = arch == ZigLLVM_ppc || arch == ZigLLVM_ppc64 || arch == ZigLLVM_ppc64le;
bool is_riscv = arch == ZigLLVM_riscv32 || arch == ZigLLVM_riscv64;
bool is_sparc = arch == ZigLLVM_sparc || arch == ZigLLVM_sparcel || arch == ZigLLVM_sparcv9;
bool is_64 = target_arch_pointer_bit_width(arch) == 64;
Buf result = BUF_INIT;
buf_resize(&result, 0);
buf_append_buf(&result, parent->zig_lib_dir);
buf_append_str(&result, OS_SEP "libc" OS_SEP "glibc" OS_SEP "sysdeps" OS_SEP);
if (arch == ZigLLVM_nios2) {
buf_append_str(&result, "nios2");
} else if (is_sparc) {
if (is_64) {
buf_append_str(&result, "sparc" OS_SEP "sparc64");
} else {
buf_append_str(&result, "sparc" OS_SEP "sparc32");
}
} else if (is_arm) {
buf_append_str(&result, "arm");
} else if (is_mips) {
buf_append_str(&result, "mips");
} else if (arch == ZigLLVM_x86_64) {
buf_append_str(&result, "x86_64");
} else if (arch == ZigLLVM_x86) {
buf_append_str(&result, "i386");
} else if (is_aarch64) {
buf_append_str(&result, "aarch64");
} else if (is_riscv) {
buf_append_str(&result, "riscv");
} else if (is_ppc) {
if (is_64) {
buf_append_str(&result, "powerpc" OS_SEP "powerpc64");
} else {
buf_append_str(&result, "powerpc" OS_SEP "powerpc32");
}
}
buf_append_str(&result, OS_SEP);
buf_append_str(&result, file);
return buf_ptr(&result);
}
static const char *get_libc_crt_file(CodeGen *parent, const char *file) {
if (parent->libc == nullptr && target_is_glibc(parent)) {
if (strcmp(file, "crti.o") == 0) {
CFile *c_file = allocate<CFile>(1);
c_file->source_path = glibc_start_asm_path(parent, "crti.S");
glibc_add_include_dirs(parent, c_file);
c_file->args.append("-D_LIBC_REENTRANT");
c_file->args.append("-include");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "include" OS_SEP "libc-modules.h"));
c_file->args.append("-DMODULE_NAME=libc");
c_file->args.append("-include");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "include" OS_SEP "libc-symbols.h"));
c_file->args.append("-DTOP_NAMESPACE=glibc");
c_file->args.append("-DASSEMBLER");
c_file->args.append("-g");
c_file->args.append("-Wa,--noexecstack");
return build_libc_object(parent, "crti", c_file);
} else if (strcmp(file, "crtn.o") == 0) {
CFile *c_file = allocate<CFile>(1);
c_file->source_path = glibc_start_asm_path(parent, "crtn.S");
glibc_add_include_dirs(parent, c_file);
c_file->args.append("-D_LIBC_REENTRANT");
c_file->args.append("-DMODULE_NAME=libc");
c_file->args.append("-DTOP_NAMESPACE=glibc");
c_file->args.append("-DASSEMBLER");
c_file->args.append("-g");
c_file->args.append("-Wa,--noexecstack");
return build_libc_object(parent, "crtn", c_file);
} else if (strcmp(file, "start.os") == 0) {
CFile *c_file = allocate<CFile>(1);
c_file->source_path = glibc_start_asm_path(parent, "start.S");
glibc_add_include_dirs(parent, c_file);
c_file->args.append("-D_LIBC_REENTRANT");
c_file->args.append("-include");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "include" OS_SEP "libc-modules.h"));
c_file->args.append("-DMODULE_NAME=libc");
c_file->args.append("-include");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "include" OS_SEP "libc-symbols.h"));
c_file->args.append("-DPIC");
c_file->args.append("-DSHARED");
c_file->args.append("-DTOP_NAMESPACE=glibc");
c_file->args.append("-DASSEMBLER");
c_file->args.append("-g");
c_file->args.append("-Wa,--noexecstack");
return build_libc_object(parent, "start", c_file);
} else if (strcmp(file, "abi-note.o") == 0) {
CFile *c_file = allocate<CFile>(1);
c_file->source_path = path_from_libc(parent, "glibc" OS_SEP "csu" OS_SEP "abi-note.S");
c_file->args.append("-I");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "csu"));
glibc_add_include_dirs(parent, c_file);
c_file->args.append("-D_LIBC_REENTRANT");
c_file->args.append("-DMODULE_NAME=libc");
c_file->args.append("-DTOP_NAMESPACE=glibc");
c_file->args.append("-DASSEMBLER");
c_file->args.append("-g");
c_file->args.append("-Wa,--noexecstack");
return build_libc_object(parent, "abi-note", c_file);
} else if (strcmp(file, "init.o") == 0) {
CFile *c_file = allocate<CFile>(1);
c_file->source_path = path_from_libc(parent, "glibc" OS_SEP "csu" OS_SEP "init.c");
c_file->args.append("-I");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "csu"));
glibc_add_include_dirs(parent, c_file);
c_file->args.append("-std=gnu11");
c_file->args.append("-fgnu89-inline");
c_file->args.append("-g");
c_file->args.append("-O2");
c_file->args.append("-fmerge-all-constants");
c_file->args.append("-fno-stack-protector");
c_file->args.append("-fmath-errno");
c_file->args.append("-DSTACK_PROTECTOR_LEVEL=0");
c_file->args.append("-ftls-model=initial-exec");
c_file->args.append("-D_LIBC_REENTRANT");
c_file->args.append("-include");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "include" OS_SEP "libc-modules.h"));
c_file->args.append("-DMODULE_NAME=libc");
c_file->args.append("-include");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "include" OS_SEP "libc-symbols.h"));
c_file->args.append("-DTOP_NAMESPACE=glibc");
return build_libc_object(parent, "init", c_file);
} else if (strcmp(file, "Scrt1.o") == 0) {
const char *start_os = get_libc_crt_file(parent, "start.os");
const char *abi_note_o = get_libc_crt_file(parent, "abi-note.o");
const char *init_o = get_libc_crt_file(parent, "init.o");
CodeGen *child_gen = create_child_codegen(parent, nullptr, OutTypeObj, nullptr);
codegen_set_out_name(child_gen, buf_create_from_str("Scrt1"));
codegen_add_object(child_gen, buf_create_from_str(start_os));
codegen_add_object(child_gen, buf_create_from_str(abi_note_o));
codegen_add_object(child_gen, buf_create_from_str(init_o));
codegen_build_and_link(child_gen);
return buf_ptr(&child_gen->output_file_path);
} else if (strcmp(file, "libc.so.6") == 0) {
return build_dummy_so(parent, "c", 6);
} else if (strcmp(file, "libm.so.6") == 0) {
return build_dummy_so(parent, "m", 6);
} else if (strcmp(file, "libpthread.so.0") == 0) {
return build_dummy_so(parent, "pthread", 0);
} else if (strcmp(file, "librt.so.1") == 0) {
return build_dummy_so(parent, "rt", 1);
} else if (strcmp(file, "libdl.so.2") == 0) {
return build_dummy_so(parent, "dl", 2);
} else if (strcmp(file, "libc_nonshared.a") == 0) {
CodeGen *child_gen = create_child_codegen(parent, nullptr, OutTypeLib, nullptr);
codegen_set_out_name(child_gen, buf_create_from_str("c_nonshared"));
child_gen->is_static = true;
{
CFile *c_file = allocate<CFile>(1);
c_file->source_path = path_from_libc(parent, "glibc" OS_SEP "csu" OS_SEP "elf-init.c");
c_file->args.append("-std=gnu11");
c_file->args.append("-fgnu89-inline");
c_file->args.append("-g");
c_file->args.append("-O2");
c_file->args.append("-fmerge-all-constants");
c_file->args.append("-fno-stack-protector");
c_file->args.append("-fmath-errno");
c_file->args.append("-fno-stack-protector");
c_file->args.append("-I");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "csu"));
glibc_add_include_dirs(parent, c_file);
c_file->args.append("-DSTACK_PROTECTOR_LEVEL=0");
c_file->args.append("-fPIC");
c_file->args.append("-fno-stack-protector");
c_file->args.append("-ftls-model=initial-exec");
c_file->args.append("-D_LIBC_REENTRANT");
c_file->args.append("-include");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "include" OS_SEP "libc-modules.h"));
c_file->args.append("-DMODULE_NAME=libc");
c_file->args.append("-include");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "include" OS_SEP "libc-symbols.h"));
c_file->args.append("-DPIC");
c_file->args.append("-DLIBC_NONSHARED=1");
c_file->args.append("-DTOP_NAMESPACE=glibc");
codegen_add_object(child_gen, buf_create_from_str(build_libc_object(parent, "elf-init", c_file)));
}
static const struct {
const char *name;
const char *path;
} deps[] = {
{"atexit", "glibc" OS_SEP "stdlib" OS_SEP "atexit.c"},
{"at_quick_exit", "glibc" OS_SEP "stdlib" OS_SEP "at_quick_exit.c"},
{"stat", "glibc" OS_SEP "io" OS_SEP "stat.c"},
{"fstat", "glibc" OS_SEP "io" OS_SEP "fstat.c"},
{"lstat", "glibc" OS_SEP "io" OS_SEP "lstat.c"},
{"stat64", "glibc" OS_SEP "io" OS_SEP "stat64.c"},
{"fstat64", "glibc" OS_SEP "io" OS_SEP "fstat64.c"},
{"lstat64", "glibc" OS_SEP "io" OS_SEP "lstat64.c"},
{"fstatat", "glibc" OS_SEP "io" OS_SEP "fstatat.c"},
{"fstatat64", "glibc" OS_SEP "io" OS_SEP "fstatat64.c"},
{"mknod", "glibc" OS_SEP "io" OS_SEP "mknod.c"},
{"mknodat", "glibc" OS_SEP "io" OS_SEP "mknodat.c"},
{"pthread_atfork", "glibc" OS_SEP "nptl" OS_SEP "pthread_atfork.c"},
{"stack_chk_fail_local", "glibc" OS_SEP "debug" OS_SEP "stack_chk_fail_local.c"},
};
for (size_t i = 0; i < array_length(deps); i += 1) {
CFile *c_file = allocate<CFile>(1);
c_file->source_path = path_from_libc(parent, deps[i].path);
c_file->args.append("-std=gnu11");
c_file->args.append("-fgnu89-inline");
c_file->args.append("-g");
c_file->args.append("-O2");
c_file->args.append("-fmerge-all-constants");
c_file->args.append("-fno-stack-protector");
c_file->args.append("-fmath-errno");
c_file->args.append("-ftls-model=initial-exec");
c_file->args.append("-Wno-ignored-attributes");
glibc_add_include_dirs(parent, c_file);
c_file->args.append("-D_LIBC_REENTRANT");
c_file->args.append("-include");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "include" OS_SEP "libc-modules.h"));
c_file->args.append("-DMODULE_NAME=libc");
c_file->args.append("-include");
c_file->args.append(path_from_libc(parent, "glibc" OS_SEP "include" OS_SEP "libc-symbols.h"));
c_file->args.append("-DPIC");
c_file->args.append("-DLIBC_NONSHARED=1");
c_file->args.append("-DTOP_NAMESPACE=glibc");
codegen_add_object(child_gen, buf_create_from_str(build_libc_object(parent, deps[i].name, c_file)));
}
codegen_build_and_link(child_gen);
return buf_ptr(&child_gen->output_file_path);
} else {
zig_unreachable();
}
} else {
assert(parent->libc != nullptr);
Buf *out_buf = buf_alloc();
os_path_join(&parent->libc->crt_dir, buf_create_from_str(file), out_buf);
return buf_ptr(out_buf);
}
}
static Buf *build_a_raw(CodeGen *parent_gen, const char *aname, Buf *full_path) {
// The Mach-O LLD code is not well maintained, and trips an assertion
// when we link compiler_rt and builtin as libraries rather than objects.
// Here we workaround this by having compiler_rt and builtin be objects.
// TODO write our own linker. https://github.com/ziglang/zig/issues/1535
OutType child_out_type = OutTypeLib;
if (parent_gen->zig_target->os == OsMacOSX) {
child_out_type = OutTypeObj;
}
CodeGen *child_gen = create_child_codegen(parent_gen, full_path, child_out_type,
parent_gen->libc);
codegen_set_is_static(child_gen, true);
codegen_set_out_name(child_gen, buf_create_from_str(aname));
// This is so that compiler_rt and builtin libraries know whether they
// will eventually be linked with libc. They make different decisions
// about what to export depending on whether libc is linked.
if (parent_gen->libc_link_lib != nullptr) {
LinkLib *new_link_lib = codegen_add_link_lib(child_gen, parent_gen->libc_link_lib->name);
new_link_lib->provided_explicitly = parent_gen->libc_link_lib->provided_explicitly;
}
codegen_build_and_link(child_gen);
return &child_gen->output_file_path;
}
static Buf *build_a(CodeGen *parent_gen, const char *aname) {
Buf *source_basename = buf_sprintf("%s.zig", aname);
Buf *full_path = buf_alloc();
os_path_join(parent_gen->zig_std_special_dir, source_basename, full_path);
return build_a_raw(parent_gen, aname, full_path);
}
static Buf *build_compiler_rt(CodeGen *parent_gen) {
Buf *full_path = buf_alloc();
os_path_join(parent_gen->zig_std_special_dir, buf_create_from_str("compiler_rt.zig"), full_path);
return build_a_raw(parent_gen, "compiler_rt", full_path);
}
static const char *get_darwin_arch_string(const ZigTarget *t) {
switch (t->arch) {
case ZigLLVM_aarch64:
return "arm64";
case ZigLLVM_thumb:
case ZigLLVM_arm:
return "arm";
case ZigLLVM_ppc:
return "ppc";
case ZigLLVM_ppc64:
return "ppc64";
case ZigLLVM_ppc64le:
return "ppc64le";
default:
return ZigLLVMGetArchTypeName(t->arch);
}
}
static const char *getLDMOption(const ZigTarget *t) {
switch (t->arch) {
case ZigLLVM_x86:
return "elf_i386";
case ZigLLVM_aarch64:
return "aarch64linux";
case ZigLLVM_aarch64_be:
return "aarch64_be_linux";
case ZigLLVM_arm:
case ZigLLVM_thumb:
return "armelf_linux_eabi";
case ZigLLVM_armeb:
case ZigLLVM_thumbeb:
return "armebelf_linux_eabi";
case ZigLLVM_ppc:
return "elf32ppclinux";
case ZigLLVM_ppc64:
return "elf64ppc";
case ZigLLVM_ppc64le:
return "elf64lppc";
case ZigLLVM_sparc:
case ZigLLVM_sparcel:
return "elf32_sparc";
case ZigLLVM_sparcv9:
return "elf64_sparc";
case ZigLLVM_mips:
return "elf32btsmip";
case ZigLLVM_mipsel:
return "elf32ltsmip";
return "elf64btsmip";
case ZigLLVM_mips64el:
return "elf64ltsmip";
case ZigLLVM_systemz:
return "elf64_s390";
case ZigLLVM_x86_64:
if (t->abi == ZigLLVM_GNUX32) {
return "elf32_x86_64";
}
// Any target elf will use the freebsd osabi if suffixed with "_fbsd".
if (t->os == OsFreeBSD) {
return "elf_x86_64_fbsd";
}
return "elf_x86_64";
default:
zig_unreachable();
}
}
static void add_rpath(LinkJob *lj, Buf *rpath) {
if (lj->rpath_table.maybe_get(rpath) != nullptr)
return;
lj->args.append("-rpath");
lj->args.append(buf_ptr(rpath));
lj->rpath_table.put(rpath, true);
}
static void construct_linker_job_elf(LinkJob *lj) {
CodeGen *g = lj->codegen;
lj->args.append("-error-limit=0");
if (g->linker_script) {
lj->args.append("-T");
lj->args.append(g->linker_script);
}
if (g->out_type != OutTypeObj) {
lj->args.append("--gc-sections");
}
lj->args.append("-m");
lj->args.append(getLDMOption(g->zig_target));
bool is_lib = g->out_type == OutTypeLib;
bool shared = !g->is_static && is_lib;
Buf *soname = nullptr;
if (g->is_static) {
if (g->zig_target->arch == ZigLLVM_arm || g->zig_target->arch == ZigLLVM_armeb ||
g->zig_target->arch == ZigLLVM_thumb || g->zig_target->arch == ZigLLVM_thumbeb)
{
lj->args.append("-Bstatic");
} else {
lj->args.append("-static");
}
} else if (shared) {
lj->args.append("-shared");
if (buf_len(&g->output_file_path) == 0) {
buf_appendf(&g->output_file_path, "lib%s.so.%" ZIG_PRI_usize ".%" ZIG_PRI_usize ".%" ZIG_PRI_usize "",
buf_ptr(g->root_out_name), g->version_major, g->version_minor, g->version_patch);
}
soname = buf_sprintf("lib%s.so.%" ZIG_PRI_usize "", buf_ptr(g->root_out_name), g->version_major);
}
lj->args.append("-o");
lj->args.append(buf_ptr(&g->output_file_path));
if (lj->link_in_crt) {
const char *crt1o;
if (g->zig_target->os == OsNetBSD) {
crt1o = "crt0.o";
} else if (g->is_static) {
crt1o = "crt1.o";
} else {
crt1o = "Scrt1.o";
}
lj->args.append(get_libc_crt_file(g, crt1o));
lj->args.append(get_libc_crt_file(g, "crti.o"));
}
for (size_t i = 0; i < g->rpath_list.length; i += 1) {
Buf *rpath = g->rpath_list.at(i);
add_rpath(lj, rpath);
}
if (g->each_lib_rpath) {
for (size_t i = 0; i < g->lib_dirs.length; i += 1) {
const char *lib_dir = g->lib_dirs.at(i);
for (size_t i = 0; i < g->link_libs_list.length; i += 1) {
LinkLib *link_lib = g->link_libs_list.at(i);
if (buf_eql_str(link_lib->name, "c")) {
continue;
}
bool does_exist;
Buf *test_path = buf_sprintf("%s/lib%s.so", lib_dir, buf_ptr(link_lib->name));
if (os_file_exists(test_path, &does_exist) != ErrorNone) {
zig_panic("link: unable to check if file exists: %s", buf_ptr(test_path));
}
if (does_exist) {
add_rpath(lj, buf_create_from_str(lib_dir));
break;
}
}
}
}
for (size_t i = 0; i < g->lib_dirs.length; i += 1) {
const char *lib_dir = g->lib_dirs.at(i);
lj->args.append("-L");
lj->args.append(lib_dir);
}
if (g->libc_link_lib != nullptr) {
if (g->libc != nullptr) {
lj->args.append("-L");
lj->args.append(buf_ptr(&g->libc->crt_dir));
}
if (!g->is_static) {
assert(g->dynamic_linker_path != nullptr);
lj->args.append("-dynamic-linker");
lj->args.append(buf_ptr(g->dynamic_linker_path));
}
}
if (shared) {
lj->args.append("-soname");
lj->args.append(buf_ptr(soname));
}
// .o files
for (size_t i = 0; i < g->link_objects.length; i += 1) {
lj->args.append((const char *)buf_ptr(g->link_objects.at(i)));
}
if (g->out_type == OutTypeExe || (g->out_type == OutTypeLib && !g->is_static)) {
if (g->libc_link_lib == nullptr && !g->is_dummy_so) {
Buf *builtin_a_path = build_a(g, "builtin");
lj->args.append(buf_ptr(builtin_a_path));
}
if (!g->is_dummy_so) {
Buf *compiler_rt_o_path = build_compiler_rt(g);
lj->args.append(buf_ptr(compiler_rt_o_path));
}
}
for (size_t i = 0; i < g->link_libs_list.length; i += 1) {
LinkLib *link_lib = g->link_libs_list.at(i);
if (buf_eql_str(link_lib->name, "c")) {
continue;
}
if (g->libc == nullptr && target_is_glibc(g)) {
// glibc
if (buf_eql_str(link_lib->name, "m")) {
lj->args.append(get_libc_crt_file(g, "libm.so.6")); // this is our dummy so file
continue;
} else if (buf_eql_str(link_lib->name, "pthread")) {
lj->args.append(get_libc_crt_file(g, "libpthread.so.0")); // this is our dummy so file
continue;
} else if (buf_eql_str(link_lib->name, "dl")) {
lj->args.append(get_libc_crt_file(g, "libdl.so.2")); // this is our dummy so file
continue;
} else if (buf_eql_str(link_lib->name, "rt")) {
lj->args.append(get_libc_crt_file(g, "librt.so.1")); // this is our dummy so file
continue;
}
}
Buf *arg;
if (buf_starts_with_str(link_lib->name, "/") || buf_ends_with_str(link_lib->name, ".a") ||
buf_ends_with_str(link_lib->name, ".so"))
{
arg = link_lib->name;
} else {
arg = buf_sprintf("-l%s", buf_ptr(link_lib->name));
}
lj->args.append(buf_ptr(arg));
}
// libc dep
if (g->libc_link_lib != nullptr) {
if (g->is_static) {
lj->args.append("--start-group");
lj->args.append("-lgcc");
lj->args.append("-lgcc_eh");
lj->args.append("-lc");
lj->args.append("-lm");
lj->args.append("--end-group");
} else if (g->libc != nullptr) {
lj->args.append("-lgcc");
lj->args.append("--as-needed");
lj->args.append("-lgcc_s");
lj->args.append("--no-as-needed");
lj->args.append("-lc");
lj->args.append("-lm");
lj->args.append("-lgcc");
lj->args.append("--as-needed");
lj->args.append("-lgcc_s");
lj->args.append("--no-as-needed");
} else if (target_is_glibc(g)) {
lj->args.append(build_libunwind(g));
lj->args.append(get_libc_crt_file(g, "libc.so.6")); // this is our dummy so file
lj->args.append(get_libc_crt_file(g, "libc_nonshared.a"));
} else {
zig_unreachable();
}
}
// crt end
if (lj->link_in_crt) {
lj->args.append(get_libc_crt_file(g, "crtn.o"));
}
if (!g->zig_target->is_native) {
lj->args.append("--allow-shlib-undefined");
}
if (g->zig_target->os == OsZen) {
lj->args.append("-e");
lj->args.append("_start");
lj->args.append("--image-base=0x10000000");
}
}
static void construct_linker_job_wasm(LinkJob *lj) {
CodeGen *g = lj->codegen;
lj->args.append("-error-limit=0");
lj->args.append("--no-entry"); // So lld doesn't look for _start.
lj->args.append("-o");
lj->args.append(buf_ptr(&g->output_file_path));
// .o files
for (size_t i = 0; i < g->link_objects.length; i += 1) {
lj->args.append((const char *)buf_ptr(g->link_objects.at(i)));
}
}
//static bool is_target_cyg_mingw(const ZigTarget *target) {
// return (target->os == ZigLLVM_Win32 && target->abi == ZigLLVM_Cygnus) ||
// (target->os == ZigLLVM_Win32 && target->abi == ZigLLVM_GNU);
//}
static void coff_append_machine_arg(CodeGen *g, ZigList<const char *> *list) {
if (g->zig_target->arch == ZigLLVM_x86) {
list->append("-MACHINE:X86");
} else if (g->zig_target->arch == ZigLLVM_x86_64) {
list->append("-MACHINE:X64");
} else if (g->zig_target->arch == ZigLLVM_arm) {
list->append("-MACHINE:ARM");
}
}
static void link_diag_callback(void *context, const char *ptr, size_t len) {
Buf *diag = reinterpret_cast<Buf *>(context);
buf_append_mem(diag, ptr, len);
}
static bool zig_lld_link(ZigLLVM_ObjectFormatType oformat, const char **args, size_t arg_count, Buf *diag) {
buf_resize(diag, 0);
return ZigLLDLink(oformat, args, arg_count, link_diag_callback, diag);
}
static void add_uefi_link_args(LinkJob *lj) {
lj->args.append("/BASE:0");
lj->args.append("/ENTRY:EfiMain");
lj->args.append("/OPT:REF");
lj->args.append("/SAFESEH:NO");
lj->args.append("/MERGE:.rdata=.data");
lj->args.append("/ALIGN:32");
lj->args.append("/NODEFAULTLIB");
lj->args.append("/SECTION:.xdata,D");
}
static void add_nt_link_args(LinkJob *lj, bool is_library) {
CodeGen *g = lj->codegen;
if (lj->link_in_crt) {
const char *lib_str = g->is_static ? "lib" : "";
const char *d_str = (g->build_mode == BuildModeDebug) ? "d" : "";
if (g->is_static) {
Buf *cmt_lib_name = buf_sprintf("libcmt%s.lib", d_str);
lj->args.append(buf_ptr(cmt_lib_name));
} else {
Buf *msvcrt_lib_name = buf_sprintf("msvcrt%s.lib", d_str);
lj->args.append(buf_ptr(msvcrt_lib_name));
}
Buf *vcruntime_lib_name = buf_sprintf("%svcruntime%s.lib", lib_str, d_str);
lj->args.append(buf_ptr(vcruntime_lib_name));
Buf *crt_lib_name = buf_sprintf("%sucrt%s.lib", lib_str, d_str);
lj->args.append(buf_ptr(crt_lib_name));
//Visual C++ 2015 Conformance Changes
//https://msdn.microsoft.com/en-us/library/bb531344.aspx
lj->args.append("legacy_stdio_definitions.lib");
// msvcrt depends on kernel32
lj->args.append("kernel32.lib");
} else {
lj->args.append("/NODEFAULTLIB");
if (!is_library) {
if (g->have_winmain) {
lj->args.append("/ENTRY:WinMain");
} else {
lj->args.append("/ENTRY:WinMainCRTStartup");
}
}
}
}
static void construct_linker_job_coff(LinkJob *lj) {
CodeGen *g = lj->codegen;
lj->args.append("/ERRORLIMIT:0");
lj->args.append("/NOLOGO");
if (!g->strip_debug_symbols) {
lj->args.append("/DEBUG");
}
if (g->out_type == OutTypeExe) {
// TODO compile time stack upper bound detection
lj->args.append("/STACK:16777216");
}
coff_append_machine_arg(g, &lj->args);
bool is_library = g->out_type == OutTypeLib;
switch (g->subsystem) {
case TargetSubsystemAuto:
if (g->zig_target->os == OsUefi) {
add_uefi_link_args(lj);
} else {
add_nt_link_args(lj, is_library);
}
break;
case TargetSubsystemConsole:
lj->args.append("/SUBSYSTEM:console");
add_nt_link_args(lj, is_library);
break;
case TargetSubsystemEfiApplication:
lj->args.append("/SUBSYSTEM:efi_application");
add_uefi_link_args(lj);
break;
case TargetSubsystemEfiBootServiceDriver:
lj->args.append("/SUBSYSTEM:efi_boot_service_driver");
add_uefi_link_args(lj);
break;
case TargetSubsystemEfiRom:
lj->args.append("/SUBSYSTEM:efi_rom");
add_uefi_link_args(lj);
break;
case TargetSubsystemEfiRuntimeDriver:
lj->args.append("/SUBSYSTEM:efi_runtime_driver");
add_uefi_link_args(lj);
break;
case TargetSubsystemNative:
lj->args.append("/SUBSYSTEM:native");
add_nt_link_args(lj, is_library);
break;
case TargetSubsystemPosix:
lj->args.append("/SUBSYSTEM:posix");
add_nt_link_args(lj, is_library);
break;
case TargetSubsystemWindows:
lj->args.append("/SUBSYSTEM:windows");
add_nt_link_args(lj, is_library);
break;
}
lj->args.append(buf_ptr(buf_sprintf("-OUT:%s", buf_ptr(&g->output_file_path))));
if (g->libc_link_lib != nullptr) {
assert(g->libc != nullptr);
lj->args.append(buf_ptr(buf_sprintf("-LIBPATH:%s", buf_ptr(&g->libc->msvc_lib_dir))));
lj->args.append(buf_ptr(buf_sprintf("-LIBPATH:%s", buf_ptr(&g->libc->kernel32_lib_dir))));
lj->args.append(buf_ptr(buf_sprintf("-LIBPATH:%s", buf_ptr(&g->libc->crt_dir))));
}
if (is_library && !g->is_static) {
lj->args.append("-DLL");
}
for (size_t i = 0; i < g->lib_dirs.length; i += 1) {
const char *lib_dir = g->lib_dirs.at(i);
lj->args.append(buf_ptr(buf_sprintf("-LIBPATH:%s", lib_dir)));
}
for (size_t i = 0; i < g->link_objects.length; i += 1) {
lj->args.append((const char *)buf_ptr(g->link_objects.at(i)));
}
if (g->out_type == OutTypeExe || (g->out_type == OutTypeLib && !g->is_static)) {
if (g->libc_link_lib == nullptr && !g->is_dummy_so) {
Buf *builtin_a_path = build_a(g, "builtin");
lj->args.append(buf_ptr(builtin_a_path));
}
// msvc compiler_rt is missing some stuff, so we still build it and rely on weak linkage
Buf *compiler_rt_o_path = build_compiler_rt(g);
lj->args.append(buf_ptr(compiler_rt_o_path));
}
Buf *def_contents = buf_alloc();
ZigList<const char *> gen_lib_args = {0};
for (size_t lib_i = 0; lib_i < g->link_libs_list.length; lib_i += 1) {
LinkLib *link_lib = g->link_libs_list.at(lib_i);
if (buf_eql_str(link_lib->name, "c")) {
continue;
}
if (link_lib->provided_explicitly) {
if (lj->codegen->zig_target->abi == ZigLLVM_GNU) {
Buf *arg = buf_sprintf("-l%s", buf_ptr(link_lib->name));
lj->args.append(buf_ptr(arg));
}
else {
lj->args.append(buf_ptr(link_lib->name));
}
} else {
buf_resize(def_contents, 0);
buf_appendf(def_contents, "LIBRARY %s\nEXPORTS\n", buf_ptr(link_lib->name));
for (size_t exp_i = 0; exp_i < link_lib->symbols.length; exp_i += 1) {
Buf *symbol_name = link_lib->symbols.at(exp_i);
buf_appendf(def_contents, "%s\n", buf_ptr(symbol_name));
}
buf_appendf(def_contents, "\n");
Buf *def_path = buf_alloc();
os_path_join(&g->artifact_dir, buf_sprintf("%s.def", buf_ptr(link_lib->name)), def_path);
os_write_file(def_path, def_contents);
Buf *generated_lib_path = buf_alloc();
os_path_join(&g->artifact_dir, buf_sprintf("%s.lib", buf_ptr(link_lib->name)), generated_lib_path);
gen_lib_args.resize(0);
gen_lib_args.append("link");
coff_append_machine_arg(g, &gen_lib_args);
gen_lib_args.append(buf_ptr(buf_sprintf("-DEF:%s", buf_ptr(def_path))));
gen_lib_args.append(buf_ptr(buf_sprintf("-OUT:%s", buf_ptr(generated_lib_path))));
Buf diag = BUF_INIT;
ZigLLVM_ObjectFormatType target_ofmt = target_object_format(g->zig_target);
if (!zig_lld_link(target_ofmt, gen_lib_args.items, gen_lib_args.length, &diag)) {
fprintf(stderr, "%s\n", buf_ptr(&diag));
exit(1);
}
lj->args.append(buf_ptr(generated_lib_path));
}
}
}
// Parse (([0-9]+)(.([0-9]+)(.([0-9]+)?))?)? and return the
// grouped values as integers. Numbers which are not provided are set to 0.
// return true if the entire string was parsed (9.2), or all groups were
// parsed (10.3.5extrastuff).
static bool darwin_get_release_version(const char *str, int *major, int *minor, int *micro, bool *had_extra) {
*had_extra = false;
*major = 0;
*minor = 0;
*micro = 0;
if (*str == '\0')
return false;
char *end;
*major = (int)strtol(str, &end, 10);
if (*str != '\0' && *end == '\0')
return true;
if (*end != '.')
return false;
str = end + 1;
*minor = (int)strtol(str, &end, 10);
if (*str != '\0' && *end == '\0')
return true;
if (*end != '.')
return false;
str = end + 1;
*micro = (int)strtol(str, &end, 10);
if (*str != '\0' && *end == '\0')
return true;
if (str == end)
return false;
*had_extra = true;
return true;
}
enum DarwinPlatformKind {
MacOS,
IPhoneOS,
IPhoneOSSimulator,
};
struct DarwinPlatform {
DarwinPlatformKind kind;
int major;
int minor;
int micro;
};
static void get_darwin_platform(LinkJob *lj, DarwinPlatform *platform) {
CodeGen *g = lj->codegen;
if (g->mmacosx_version_min) {
platform->kind = MacOS;
} else if (g->mios_version_min) {
platform->kind = IPhoneOS;
} else if (g->zig_target->os == OsMacOSX) {
platform->kind = MacOS;
g->mmacosx_version_min = buf_create_from_str("10.10");
} else {
zig_panic("unable to infer -mmacosx-version-min or -mios-version-min");
}
bool had_extra;
if (platform->kind == MacOS) {
if (!darwin_get_release_version(buf_ptr(g->mmacosx_version_min),
&platform->major, &platform->minor, &platform->micro, &had_extra) ||
had_extra || platform->major != 10 || platform->minor >= 100 || platform->micro >= 100)
{
zig_panic("invalid -mmacosx-version-min");
}
} else if (platform->kind == IPhoneOS) {
if (!darwin_get_release_version(buf_ptr(g->mios_version_min),
&platform->major, &platform->minor, &platform->micro, &had_extra) ||
had_extra || platform->major >= 10 || platform->minor >= 100 || platform->micro >= 100)
{
zig_panic("invalid -mios-version-min");
}
} else {
zig_unreachable();
}
if (platform->kind == IPhoneOS &&
(g->zig_target->arch == ZigLLVM_x86 ||
g->zig_target->arch == ZigLLVM_x86_64))
{
platform->kind = IPhoneOSSimulator;
}
}
static bool darwin_version_lt(DarwinPlatform *platform, int major, int minor) {
if (platform->major < major) {
return true;
} else if (platform->major > major) {
return false;
}
if (platform->minor < minor) {
return true;
}
return false;
}
static void construct_linker_job_macho(LinkJob *lj) {
CodeGen *g = lj->codegen;
// LLD MACH-O has no error limit option.
//lj->args.append("-error-limit=0");
lj->args.append("-demangle");
if (g->linker_rdynamic) {
lj->args.append("-export_dynamic");
}
bool is_lib = g->out_type == OutTypeLib;
bool shared = !g->is_static && is_lib;
if (g->is_static) {
lj->args.append("-static");
} else {
lj->args.append("-dynamic");
}
if (is_lib) {
if (!g->is_static) {
lj->args.append("-dylib");
Buf *compat_vers = buf_sprintf("%" ZIG_PRI_usize ".0.0", g->version_major);
lj->args.append("-compatibility_version");
lj->args.append(buf_ptr(compat_vers));
Buf *cur_vers = buf_sprintf("%" ZIG_PRI_usize ".%" ZIG_PRI_usize ".%" ZIG_PRI_usize,
g->version_major, g->version_minor, g->version_patch);
lj->args.append("-current_version");
lj->args.append(buf_ptr(cur_vers));
// TODO getting an error when running an executable when doing this rpath thing
//Buf *dylib_install_name = buf_sprintf("@rpath/lib%s.%" ZIG_PRI_usize ".dylib",
// buf_ptr(g->root_out_name), g->version_major);
//lj->args.append("-install_name");
//lj->args.append(buf_ptr(dylib_install_name));
if (buf_len(&g->output_file_path) == 0) {
buf_appendf(&g->output_file_path, "lib%s.%" ZIG_PRI_usize ".%" ZIG_PRI_usize ".%" ZIG_PRI_usize ".dylib",
buf_ptr(g->root_out_name), g->version_major, g->version_minor, g->version_patch);
}
}
}
lj->args.append("-arch");
lj->args.append(get_darwin_arch_string(g->zig_target));
DarwinPlatform platform;
get_darwin_platform(lj, &platform);
switch (platform.kind) {
case MacOS:
lj->args.append("-macosx_version_min");
break;
case IPhoneOS:
lj->args.append("-iphoneos_version_min");
break;
case IPhoneOSSimulator:
lj->args.append("-ios_simulator_version_min");
break;
}
Buf *version_string = buf_sprintf("%d.%d.%d", platform.major, platform.minor, platform.micro);
lj->args.append(buf_ptr(version_string));
lj->args.append("-sdk_version");
lj->args.append(buf_ptr(version_string));
if (g->out_type == OutTypeExe) {
if (g->is_static) {
lj->args.append("-no_pie");
} else {
lj->args.append("-pie");
}
}
lj->args.append("-o");
lj->args.append(buf_ptr(&g->output_file_path));
for (size_t i = 0; i < g->rpath_list.length; i += 1) {
Buf *rpath = g->rpath_list.at(i);
add_rpath(lj, rpath);
}
add_rpath(lj, &g->output_file_path);
if (shared) {
if (g->system_linker_hack) {
lj->args.append("-headerpad_max_install_names");
}
} else if (g->is_static) {
lj->args.append("-lcrt0.o");
} else {
switch (platform.kind) {
case MacOS:
if (darwin_version_lt(&platform, 10, 5)) {
lj->args.append("-lcrt1.o");
} else if (darwin_version_lt(&platform, 10, 6)) {
lj->args.append("-lcrt1.10.5.o");
} else if (darwin_version_lt(&platform, 10, 8)) {
lj->args.append("-lcrt1.10.6.o");
}
break;
case IPhoneOS:
if (g->zig_target->arch == ZigLLVM_aarch64) {
// iOS does not need any crt1 files for arm64
} else if (darwin_version_lt(&platform, 3, 1)) {
lj->args.append("-lcrt1.o");
} else if (darwin_version_lt(&platform, 6, 0)) {
lj->args.append("-lcrt1.3.1.o");
}
break;
case IPhoneOSSimulator:
// no crt1.o needed
break;
}
}
for (size_t i = 0; i < g->lib_dirs.length; i += 1) {
const char *lib_dir = g->lib_dirs.at(i);
lj->args.append("-L");
lj->args.append(lib_dir);
}
for (size_t i = 0; i < g->link_objects.length; i += 1) {
lj->args.append((const char *)buf_ptr(g->link_objects.at(i)));
}
// compiler_rt on darwin is missing some stuff, so we still build it and rely on LinkOnce
if (g->out_type == OutTypeExe || (g->out_type == OutTypeLib && !g->is_static)) {
Buf *compiler_rt_o_path = build_compiler_rt(g);
lj->args.append(buf_ptr(compiler_rt_o_path));
}
if (g->zig_target->is_native) {
for (size_t lib_i = 0; lib_i < g->link_libs_list.length; lib_i += 1) {
LinkLib *link_lib = g->link_libs_list.at(lib_i);
if (buf_eql_str(link_lib->name, "c")) {
// on Darwin, libSystem has libc in it, but also you have to use it
// to make syscalls because the syscall numbers are not documented
// and change between versions.
// so we always link against libSystem
lj->args.append("-lSystem");
} else {
if (strchr(buf_ptr(link_lib->name), '/') == nullptr) {
Buf *arg = buf_sprintf("-l%s", buf_ptr(link_lib->name));
lj->args.append(buf_ptr(arg));
} else {
lj->args.append(buf_ptr(link_lib->name));
}
}
}
} else {
lj->args.append("-undefined");
lj->args.append("dynamic_lookup");
}
if (platform.kind == MacOS) {
if (darwin_version_lt(&platform, 10, 5)) {
lj->args.append("-lgcc_s.10.4");
} else if (darwin_version_lt(&platform, 10, 6)) {
lj->args.append("-lgcc_s.10.5");
}
} else {
zig_panic("TODO");
}
for (size_t i = 0; i < g->darwin_frameworks.length; i += 1) {
lj->args.append("-framework");
lj->args.append(buf_ptr(g->darwin_frameworks.at(i)));
}
}
static void construct_linker_job(LinkJob *lj) {
switch (target_object_format(lj->codegen->zig_target)) {
case ZigLLVM_UnknownObjectFormat:
zig_unreachable();
case ZigLLVM_COFF:
return construct_linker_job_coff(lj);
case ZigLLVM_ELF:
return construct_linker_job_elf(lj);
case ZigLLVM_MachO:
return construct_linker_job_macho(lj);
case ZigLLVM_Wasm:
return construct_linker_job_wasm(lj);
}
}
void codegen_link(CodeGen *g) {
codegen_add_time_event(g, "Build Dependencies");
LinkJob lj = {0};
// even though we're calling LLD as a library it thinks the first
// argument is its own exe name
lj.args.append("lld");
lj.rpath_table.init(4);
lj.codegen = g;
if (g->verbose_llvm_ir) {
fprintf(stderr, "\nOptimization:\n");
fprintf(stderr, "---------------\n");
fflush(stderr);
LLVMDumpModule(g->module);
}
if (g->out_type == OutTypeObj) {
lj.args.append("-r");
}
if (g->out_type == OutTypeLib && g->is_static) {
ZigList<const char *> file_names = {};
for (size_t i = 0; i < g->link_objects.length; i += 1) {
file_names.append((const char *)buf_ptr(g->link_objects.at(i)));
}
ZigLLVM_OSType os_type = get_llvm_os_type(g->zig_target->os);
codegen_add_time_event(g, "LLVM Link");
if (g->verbose_link) {
fprintf(stderr, "ar rcs %s", buf_ptr(&g->output_file_path));
for (size_t i = 0; i < g->link_objects.length; i += 1) {
fprintf(stderr, " %s", (const char *)buf_ptr(g->link_objects.at(i)));
}
fprintf(stderr, "\n");
}
if (ZigLLVMWriteArchive(buf_ptr(&g->output_file_path), file_names.items, file_names.length, os_type)) {
fprintf(stderr, "Unable to write archive '%s'\n", buf_ptr(&g->output_file_path));
exit(1);
}
return;
}
lj.link_in_crt = (g->libc_link_lib != nullptr && g->out_type == OutTypeExe);
construct_linker_job(&lj);
if (g->verbose_link) {
for (size_t i = 0; i < lj.args.length; i += 1) {
const char *space = (i != 0) ? " " : "";
fprintf(stderr, "%s%s", space, lj.args.at(i));
}
fprintf(stderr, "\n");
}
Buf diag = BUF_INIT;
codegen_add_time_event(g, "LLVM Link");
if (g->system_linker_hack && g->zig_target->os == OsMacOSX) {
Termination term;
ZigList<const char *> args = {};
for (size_t i = 1; i < lj.args.length; i += 1) {
args.append(lj.args.at(i));
}
os_spawn_process("ld", args, &term);
if (term.how != TerminationIdClean || term.code != 0) {
exit(1);
}
} else if (!zig_lld_link(target_object_format(g->zig_target), lj.args.items, lj.args.length, &diag)) {
fprintf(stderr, "%s\n", buf_ptr(&diag));
exit(1);
}
}
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