Convert GCC makefile script to LLVM 3.0 Compiler

Question

I'm working on an open source project for the iPhone, and have converted the project to use ARC and the Apple LLVM 3.0 compiler. However, the project relies on an external library built using a makefile as it is written in C. Currently, it uses GCC to compile, and during the make it references the ARC-ified Objective-C code which causes errors as some symbols (such as @autorelease) don't exist on pre-LLVM compilers.

But enough about that. My question is how can I convert this snippet of code:

VERSION=4.3
COPT = -F/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${VERSION}.sdk/System/Library/Frameworks -F/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${VERSION}.sdk/System/Library/PrivateFrameworks -I../../ -I../../Classes/ -I/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.0.sdk/usr/lib/gcc/arm-apple-darwin9/4.2.1/include -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${VERSION}.sdk  -L/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${VERSION}.sdk/usr/lib -I/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${VERSION}.sdk/usr/include/
COPT += -march=armv7-a -miphoneos-version-min=${VERSION} -I. -O3 -D__IPHONE__ -D_SNESPPC -DASM_SPC700 -DZLIB -DUNZIP_SUPPORT -DOLD_COLOUR_BLENDING -DUSE_SA1 -DSUPER_FX -DLSB_FIRST -DCPU_SHUTDOWN -DVAR_CYCLES
COPT += -fnested-functions -funsigned-char -ffast-math -fexpensive-optimizations -ftemplate-depth-36 -mstructure-size-boundary=32 -falign-functions=32 -falign-loops -falign-labels -falign-jumps -finline -finline-functions -fno-builtin -fno-common -fomit-frame-pointer -fpeel-loops -fstrength-reduce -funroll-loops -fstrict-aliasing 
GCC = /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-gcc-4.2.1
GXX = /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-g++-4.2.1
STRIP = /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/strip

to use the LLVM compiler? I've tried modifying it to this:

VERSION=5.0
COPT = -F/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${VERSION}.sdk/System/Library/Frameworks -F/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${VERSION}.sdk/System/Library/PrivateFrameworks -I../../ -I../../Classes/ -I/Developer/Platforms/iPhoneOS.platform/Developer/usr/lib/clang/3.0/include -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${VERSION}.sdk  -L/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${VERSION}.sdk/usr/lib -I/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS${VERSION}.sdk/usr/include/
COPT += -march=armv7-a -miphoneos-version-min=${VERSION} -I. -O3 -D__IPHONE__ -D_SNESPPC -DASM_SPC700 -DZLIB -DUNZIP_SUPPORT -DOLD_COLOUR_BLENDING -DUSE_SA1 -DSUPER_FX -DLSB_FIRST -DCPU_SHUTDOWN -DVAR_CYCLES
COPT += -fnested-functions -funsigned-char -ffast-math -fexpensive-optimizations -ftemplate-depth-36 -mstructure-size-boundary=32 -falign-functions=32 -falign-loops -falign-labels -falign-jumps -finline -finline-functions -fno-builtin -fno-common -fomit-frame-pointer -fpeel-loops -fstrength-reduce -funroll-loops -fstrict-aliasing 
GCC = /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/clang
GXX = /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/clang++
STRIP = /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/strip

But this targets the i386 architecture, instead of the ARM architecture for iOS, so I get errors such as:

"i386/types.h" not found

Is there a special version of clang for ARM? Or am I completely missing something?

Answer 1

Try -arch armv7; you need to explicitly specify the target to build for ARM with clang.