$ make
arm-apple-darwin8-gcc -Wall -v -framework UIKit   -c -o MailFix.o MailFix.m
Using built-in specs.
Target: arm-apple-darwin8
Configured with: /Users/jjgod/Codes/iphone/llvm-gcc-4.2/configure --with-sysroot=/Users/jjgod/iPhoneUnofficial.sdk/sysroot --enable-languages=c,c++,objc,obj-c++ --target=arm-apple-darwin8 --with-gxx-include-dir=/usr/include/c++/4.0.0 --enable-wchar_t=no --with-as=/Users/jjgod/iPhoneUnofficial.sdk/prefix/bin/arm-apple-darwin8-as --with-ld=/Users/jjgod/iPhoneUnofficial.sdk/prefix/bin/arm-apple-darwin8-ld --prefix=/Users/jjgod/iPhoneUnofficial.sdk/prefix
Thread model: posix
gcc version 4.2.1 (Based on Apple Inc. build 5555)
 /Users/jjgod/iphone/prefix/bin/../libexec/gcc/arm-apple-darwin8/4.2.1/cc1obj -quiet -v -iprefix /Users/jjgod/iphone/prefix/bin/../lib/gcc/arm-apple-darwin8/4.2.1/ -D__DYNAMIC__ MailFix.m -fPIC -fno-builtin-strcat -fno-builtin-strcpy -quiet -dumpbase MailFix.m -mmacosx-version-min=10.4 -auxbase-strip MailFix.o -Wall -version -o /var/folders/Ux/UxKA5fWiFamwdqVdGeYSNk+++TI/-Tmp-//ccFLexeo.s
ignoring nonexistent directory "/Users/jjgod/iPhoneUnofficial.sdk/sysroot/usr/local/include"
ignoring nonexistent directory "/Users/jjgod/iPhoneUnofficial.sdk/sysroot/Users/jjgod/iPhoneUnofficial.sdk/prefix/lib/gcc/arm-apple-darwin8/4.2.1/include"
ignoring nonexistent directory "/Users/jjgod/iPhoneUnofficial.sdk/sysroot/Users/jjgod/iPhoneUnofficial.sdk/prefix/lib/gcc/arm-apple-darwin8/4.2.1/../../../../arm-apple-darwin8/include"
#include "..." search starts here:
#include <...> search starts here:
 /Users/jjgod/iPhoneUnofficial.sdk/sysroot/usr/include
 /Users/jjgod/iPhoneUnofficial.sdk/sysroot/System/Library/Frameworks (framework directory)
 /Users/jjgod/iPhoneUnofficial.sdk/sysroot/Library/Frameworks (framework directory)
End of search list.
GNU Objective-C version 4.2.1 (Based on Apple Inc. build 5555) (arm-apple-darwin8)
	compiled by GNU C version 4.0.1 (Apple Inc. build 5470) (Aspen 5470.3).
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 21dd917302abad07702961f007630117
MailFix.m:3:24: error: UIKit/UIKit.h: No such file or directory
MailFix.m: In function ‘MailFixInitialize’:
MailFix.m:8: warning: implicit declaration of function ‘printf’
MailFix.m:8: warning: incompatible implicit declaration of built-in function ‘printf’
MailFix.m: In function ‘MailFixFinalize’:
MailFix.m:14: warning: incompatible implicit declaration of built-in function ‘printf’
make: *** [MailFix.o] Error 1