more efficient builtin library code generation

 * introduce --disable-pic option which can generally be allowed to be
   the default. compiler_rt.a and builtin.a get this option when you
   build a static executable.
 * compiler_rt and builtin libraries are not built for build-lib
   --static
 * posix_spawn instead of fork/execv
 * disable the error limit on LLD. Fixes the blank lines printed

1 files changed, 5 insertions, 1 deletions

diff --git a/src/codegen.cpp b/src/codegen.cpp
index fd7a386078..02105b4d2a 100644
--- a/src/codegen.cpp
+++ b/src/codegen.cpp
@@ -7228,7 +7228,10 @@ static void init(CodeGen *g) {
     bool is_optimized = g->build_mode != BuildModeDebug;
     LLVMCodeGenOptLevel opt_level = is_optimized ? LLVMCodeGenLevelAggressive : LLVMCodeGenLevelNone;
 
-    LLVMRelocMode reloc_mode = g->is_static ? LLVMRelocStatic : LLVMRelocPIC;
+    if (g->out_type == OutTypeExe && g->is_static) {
+        g->disable_pic = true;
+    }
+    LLVMRelocMode reloc_mode = g->disable_pic ? LLVMRelocStatic : LLVMRelocPIC;
 
     const char *target_specific_cpu_args;
     const char *target_specific_features;
@@ -8047,6 +8050,7 @@ static Error check_cache(CodeGen *g, Buf *manifest_dir, Buf *digest) {
     cache_bool(ch, g->linker_rdynamic);
     cache_bool(ch, g->no_rosegment_workaround);
     cache_bool(ch, g->each_lib_rpath);
+    cache_bool(ch, g->disable_pic);
     cache_buf_opt(ch, g->mmacosx_version_min);
     cache_buf_opt(ch, g->mios_version_min);
     cache_usize(ch, g->version_major);