compiling ruby with -O2

gistfile1.txt

$ CFLAGS='-O2 -fno-fast-math' ./configure 

$ make                                                                                            
	CC = clang
	LD = ld
	LDSHARED = clang -dynamic -bundle
	CFLAGS = -O2 -fno-fast-math -pipe 
	XCFLAGS = -D_FORTIFY_SOURCE=2 -fstack-protector -fno-strict-overflow -fvisibility=hidden -DRUBY_EXPORT -fPIE
	CPPFLAGS = -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE -D_DARWIN_UNLIMITED_SELECT -D_REENTRANT   -I. -I.ext/include/x86_64-darwin13 -I./include -I.
	DLDFLAGS = -Wl,-undefined,dynamic_lookup -Wl,-multiply_defined,suppress -fstack-protector -Wl,-u,_objc_msgSend -Wl,-pie -framework CoreFoundation  
	SOLIBS = -lgmp 
Apple LLVM version 5.1 (clang-503.0.40) (based on LLVM 3.4svn)
Target: x86_64-apple-darwin13.3.0
Thread model: posix
compiling file.c
compiling gc.c