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cli: support --gc-sections and --no-gc-sections for Zig sources

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This commit is contained in:
Jakub Konka 2022-07-05 14:42:45 +02:00
parent 44ee42c6bc
commit 7ec9a4f382
2 changed files with 14 additions and 1 deletions
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7
lib/std/build.zig
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@ -1561,6 +1561,10 @@ pub const LibExeObjStep = struct {
/// safely garbage-collected during the linking phase.
link_function_sections: bool = false,
/// Remove functions and data that are unreachable by the entry point or
/// exported symbols.
link_gc_sections: ?bool = null,
linker_allow_shlib_undefined: ?bool = null,
/// Permit read-only relocations in read-only segments. Disallowed by default.
@ -2705,6 +2709,9 @@ pub const LibExeObjStep = struct {
if (self.link_function_sections) {
try zig_args.append("-ffunction-sections");
}
if (self.link_gc_sections) |x| {
try zig_args.append(if (x) "--gc-sections" else "--no-gc-sections");
}
if (self.linker_allow_shlib_undefined) |x| {
try zig_args.append(if (x) "-fallow-shlib-undefined" else "-fno-allow-shlib-undefined");
}

8
src/main.zig
View File

@ -446,6 +446,8 @@ const usage_build_generic =
\\ --compress-debug-sections=[e] Debug section compression settings
\\ none No compression
\\ zlib Compression with deflate/inflate
\\ --gc-sections Force removal of functions and data that are unreachable by the entry point or exported symbols
\\ --no-gc-sections Don't force removal of unreachable functions and data
\\ --subsystem [subsystem] (Windows) /SUBSYSTEM:<subsystem> to the linker
\\ --stack [size] Override default stack size
\\ --image-base [addr] Set base address for executable image
@ -463,7 +465,7 @@ const usage_build_generic =
\\ -search_dylibs_first (Darwin) search `libx.dylib` in each dir in library search paths, then `libx.a`
\\ -headerpad [value] (Darwin) set minimum space for future expansion of the load commands in hexadecimal notation
\\ -headerpad_max_install_names (Darwin) set enough space as if all paths were MAXPATHLEN
\\ -dead_strip (Darwin) remove function and data that are unreachable by the entry point of exported symbols
\\ -dead_strip (Darwin) remove functions and data that are unreachable by the entry point or exported symbols
\\ -dead_strip_dylibs (Darwin) remove dylibs that are unreachable by the entry point or exported symbols
\\ --import-memory (WebAssembly) import memory from the environment
\\ --import-table (WebAssembly) import function table from the host environment
@ -1314,6 +1316,10 @@ fn buildOutputType(
try linker_export_symbol_names.append(arg["--export=".len..]);
} else if (mem.eql(u8, arg, "-Bsymbolic")) {
linker_bind_global_refs_locally = true;
} else if (mem.eql(u8, arg, "--gc-sections")) {
linker_gc_sections = true;
} else if (mem.eql(u8, arg, "--no-gc-sections")) {
linker_gc_sections = false;
} else if (mem.eql(u8, arg, "--debug-compile-errors")) {
debug_compile_errors = true;
} else if (mem.eql(u8, arg, "--verbose-link")) {