build: Change default CC to be clang instead of gcc.

llvm-svn: 144658

compiler-rt/make/platform/clang_darwin.mk

@@ -67,7 +67,7 @@ endif
 
 ###
 
-CC := gcc
+CC := clang
 
 # Forcibly strip off any -arch, as that totally breaks our universal support.
 override CC := $(subst -arch ,-arch_,$(CC))

compiler-rt/make/platform/darwin_fat.mk

@@ -37,7 +37,7 @@ UniversalArchs := i386 ppc x86_64
 #   <Option Name>.<Arch Name> := ...
 #   <Option Name>.<Config Name>.<Arch Name> := ...
 
-CC := gcc
+CC := clang
 
 CFLAGS := -Wall -Werror
 CFLAGS.Debug := $(CFLAGS) -g

compiler-rt/make/platform/multi_arch.mk

@@ -5,8 +5,7 @@ Configs := m32 m64
 Arch := i386
 Arch.m64 := x86_64
 
-CC := gcc
-CC.m32 := clang
+CC := clang
 
 CFLAGS := -Wall -Werror
 CFLAGS.m32 := $(CFLAGS) -m32 -O3