build command supports -isystem argument

src/all_types.hpp

@@ -1041,6 +1041,9 @@ struct CodeGen {
     uint32_t error_value_count;
     TypeTableEntry *err_tag_type;
     LLVMValueRef int_overflow_fns[2][3][4]; // [0-signed,1-unsigned][0-add,1-sub,2-mul][0-8,1-16,2-32,3-64]
+
+    const char **clang_argv;
+    int clang_argv_len;
 };
 
 struct VariableTableEntry {

src/analyze.cpp

@@ -1057,7 +1057,9 @@ static void resolve_c_import_decl(CodeGen *g, ImportTableEntry *import, AstNode
     find_libc_path(g);
     int err;
     ParseH parse_h = {{0}};
-    if ((err = parse_h_buf(&parse_h, child_context->c_import_buf, buf_ptr(g->libc_include_path)))) {
+    if ((err = parse_h_buf(&parse_h, child_context->c_import_buf, g->clang_argv, g->clang_argv_len,
+                    buf_ptr(g->libc_include_path))))
+    {
         zig_panic("unable to parse h file: %s\n", err_str(err));
     }
 

src/codegen.cpp

@@ -32,6 +32,11 @@ CodeGen *codegen_create(Buf *root_source_dir) {
     return g;
 }
 
+void codegen_set_clang_argv(CodeGen *g, const char **args, int len) {
+    g->clang_argv = args;
+    g->clang_argv_len = len;
+}
+
 void codegen_set_build_type(CodeGen *g, CodeGenBuildType build_type) {
     g->build_type = build_type;
 }

src/codegen.hpp

@@ -13,6 +13,7 @@
 
 CodeGen *codegen_create(Buf *root_source_dir);
 
+void codegen_set_clang_argv(CodeGen *codegen, const char **args, int len);
 void codegen_set_build_type(CodeGen *codegen, CodeGenBuildType build_type);
 void codegen_set_is_static(CodeGen *codegen, bool is_static);
 void codegen_set_strip(CodeGen *codegen, bool strip);

src/main.cpp

@@ -20,7 +20,7 @@ static int usage(const char *arg0) {
         "  build                  create executable, object, or library from target\n"
         "  version                print version number and exit\n"
         "  parseh                 convert a c header file to zig extern declarations\n"
-        "Command: build target\n"
+        "Options:\n"
         "  --release              build with optimizations on and debug protection off\n"
         "  --static               output will be statically linked\n"
         "  --strip                exclude debug symbols\n"
@@ -30,10 +30,8 @@ static int usage(const char *arg0) {
         "  --verbose              turn on compiler debug output\n"
         "  --color [auto|off|on]  enable or disable colored error messages\n"
         "  --libc-path [path]     set the C compiler data path\n"
-        "Command: parseh target\n"
         "  -isystem [dir]         add additional search path for other .h files\n"
         "  -dirafter [dir]        same as -isystem but do it last\n"
-        "  -B[prefix]             set the C compiler data path\n"
     , arg0);
     return EXIT_FAILURE;
 }
@@ -54,6 +52,7 @@ struct Build {
     bool verbose;
     ErrColor color;
     const char *libc_path;
+    ZigList<const char *> clang_argv;
 };
 
 static int build(const char *arg0, int argc, char **argv) {
@@ -62,7 +61,7 @@ static int build(const char *arg0, int argc, char **argv) {
 
     for (int i = 0; i < argc; i += 1) {
         char *arg = argv[i];
-        if (arg[0] == '-' && arg[1] == '-') {
+        if (arg[0] == '-') {
             if (strcmp(arg, "--release") == 0) {
                 b.release = true;
             } else if (strcmp(arg, "--strip") == 0) {
@@ -103,6 +102,12 @@ static int build(const char *arg0, int argc, char **argv) {
                     b.out_name = argv[i];
                 } else if (strcmp(arg, "--libc-path") == 0) {
                     b.libc_path = argv[i];
+                } else if (strcmp(arg, "-isystem") == 0) {
+                    b.clang_argv.append("-isystem");
+                    b.clang_argv.append(argv[i]);
+                } else if (strcmp(arg, "-dirafter") == 0) {
+                    b.clang_argv.append("-dirafter");
+                    b.clang_argv.append(argv[i]);
                 } else {
                     return usage(arg0);
                 }
@@ -140,6 +145,7 @@ static int build(const char *arg0, int argc, char **argv) {
 
     CodeGen *g = codegen_create(&root_source_dir);
     codegen_set_build_type(g, b.release ? CodeGenBuildTypeRelease : CodeGenBuildTypeDebug);
+    codegen_set_clang_argv(g, b.clang_argv.items, b.clang_argv.length);
     codegen_set_strip(g, b.strip);
     codegen_set_is_static(g, b.is_static);
     if (b.out_type != OutTypeUnknown)
@@ -202,8 +208,7 @@ static int parseh(const char *arg0, int argc, char **argv) {
                 }
                 clang_argv.append("-isystem");
                 clang_argv.append(argv[i + 1]);
-            } else if (arg[1] == 'B') {
-                clang_argv.append(arg);
+                i += 1;
             } else {
                 fprintf(stderr, "unrecognized argument: %s", arg);
                 return usage(arg0);

src/parseh.cpp

@@ -345,7 +345,7 @@ static bool decl_visitor(void *context, const Decl *decl) {
     return true;
 }
 
-int parse_h_buf(ParseH *parse_h, Buf *source, const char *libc_include_path) {
+int parse_h_buf(ParseH *parse_h, Buf *source, const char **args, int args_len, const char *libc_include_path) {
     int err;
     Buf tmp_file_path = BUF_INIT;
     if ((err = os_buf_to_tmp_file(source, buf_create_from_str(".h"), &tmp_file_path))) {
@@ -357,6 +357,10 @@ int parse_h_buf(ParseH *parse_h, Buf *source, const char *libc_include_path) {
     clang_argv.append("-isystem");
     clang_argv.append(libc_include_path);
 
+    for (int i = 0; i < args_len; i += 1) {
+        clang_argv.append(args[i]);
+    }
+
     err = parse_h_file(parse_h, &clang_argv);
 
     os_delete_file(&tmp_file_path);

src/parseh.hpp

@@ -12,6 +12,6 @@
 #include "all_types.hpp"
 
 int parse_h_file(ParseH *parse_h, ZigList<const char *> *clang_argv);
-int parse_h_buf(ParseH *parse_h, Buf *buf, const char *libc_include_path);
+int parse_h_buf(ParseH *parse_h, Buf *source, const char **args, int args_len, const char *libc_include_path);
 
 #endif