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pass explicit frame pointer args when compiling C code

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Andrew Kelley 2019-03-18 16:45:37 -04:00
parent a17bf219c6
commit 1b801bdbae
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1 changed files with 11 additions and 0 deletions
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11
src/codegen.cpp
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@ -8474,8 +8474,11 @@ static void gen_c_object(CodeGen *g, Buf *self_exe_path, CFile *c_file) {
} else {
args.append("-fno-stack-protector");
}
args.append("-fno-omit-frame-pointer");
break;
case BuildModeSafeRelease:
// See the comment in the BuildModeFastRelease case for why we pass -O2 rather
// than -O3 here.
args.append("-O2");
if (g->libc_link_lib != nullptr) {
args.append("-D_FORTIFY_SOURCE=2");
@ -8485,16 +8488,24 @@ static void gen_c_object(CodeGen *g, Buf *self_exe_path, CFile *c_file) {
} else {
args.append("-fno-stack-protector");
}
args.append("-fomit-frame-pointer");
break;
case BuildModeFastRelease:
args.append("-DNDEBUG");
// Here we pass -O2 rather than -O3 because, although we do the equivalent of
// -O3 in Zig code, the justification for the difference here is that Zig
// has better detection and prevention of undefined behavior, so -O3 is safer for
// Zig code than it is for C code. Also, C programmers are used to their code
// running in -O2 and thus the -O3 path has been tested less.
args.append("-O2");
args.append("-fno-stack-protector");
args.append("-fomit-frame-pointer");
break;
case BuildModeSmallRelease:
args.append("-DNDEBUG");
args.append("-Os");
args.append("-fno-stack-protector");
args.append("-fomit-frame-pointer");
break;
}