我一直在为iOS编写不同的图书馆,直到iOS5没有问题.好的,显然我的问题是,iOS5 SDK不再包含GNU
gcc编译器了.只有llvm和clang可用.
我的问题是,我无法完成任何库的“配置”脚本.它总是失败与：
configure: error: C preprocessor "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc" fails sanity check
gcc只是一个到llvm编译器的符号链接.如果我把它设置为clang,它会产生相同的错误. (只是一个更好的语法错误表示)
这里config.log的重要部分：
configure:3338: checking how to recognise dependent libraries configure:3514: result: pass_all configure:3993: checking how to run the C preprocessor configure:4111: result: /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc configure:4135: /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc -B/Developer/Platforms/iPhoneOS.platform/Developer/usr -arch armv7 -miphoneos-version-min=5.0 -gdwarf-2 -mthumb -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk -L/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk/usr/lib/system conftest.c conftest.c:14: error: expected '=',',';','asm' or '__attribute__' before 'error' configure:4141: $? = 1 configure: Failed program was: | /* confdefs.h. */ | | #define PACKAGE_NAME "expat" | #define PACKAGE_TARNAME "expat" | #define PACKAGE_VERSION "2.0.1" | #define PACKAGE_STRING "expat 2.0.1" | #define PACKAGE_BUGREPORT "expat-bugs@libexpat.org" | /* end confdefs.h. */ | #ifdef __STDC__ | # include <limits.h> | #else | # include <assert.h> | #endif | Syntax error configure:4135: /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc -B/Developer/Platforms/iPhoneOS.platform/Developer/usr -arch armv7 -miphoneos-version-min=5.0 -gdwarf-2 -mthumb -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk -L/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk/usr/lib/system conftest.c conftest.c:14: error: expected '=','asm' or '__attribute__' before 'error' configure:4141: $? = 1 configure: Failed program was: | /* confdefs.h. */ | | #define PACKAGE_NAME "expat" | #define PACKAGE_TARNAME "expat" | #define PACKAGE_VERSION "2.0.1" | #define PACKAGE_STRING "expat 2.0.1" | #define PACKAGE_BUGREPORT "expat-bugs@libexpat.org" | /* end confdefs.h. */ | #ifdef __STDC__ | # include <limits.h> | #else | # include <assert.h> | #endif | Syntax error configure:4210: error: C preprocessor "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc" fails sanity check See `config.log' for more details.
这是我的环境.有点过分,但它可以正常工作iOS4.X.
# Defines DEVROOT=/Developer/Platforms/iPhoneOS.platform/Developer SDKROOT=$DEVROOT/SDKs/iPhoneOS5.0.sdk # BUILD STUFF export CXXFLAGS="-B/Developer/Platforms/iPhoneOS.platform/Developer/usr -arch armv7 -miphoneos-version-min=5.0 -gdwarf-2 -mthumb -isysroot $SDKROOT -L$SDKROOT/usr/lib/system" export CPPFLAGS="$CXXFLAGS" export CFLAGS="$CXXFLAGS" export CPP=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc export CXXCPP=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/g++ #export CXX=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/g++ export CC=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc export LD=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/ld export RANLIB=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/ranlib export AR=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/ar export STRIP=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/strip export LIBTOOL=/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/libtool export INSTALL_DIR=/Users/mriedel/MPI/CrossCompiling/armv7_dev_install export CPATH=$INSTALL_DIR/include export LIBRARY_PATH=$INSTALL_DIR/lib
我一直在努力想出这个数周,但没有运气.我觉得其他人一定会遇到这个问题.但谷歌没有提出什么.有一段时间,我试图使用gaspreprocessor.pl,但也没有任何运气.
啊,我的配置调用总是类似于：
./configure --prefix=$INSTALL_DIR --disable-shared --enable-static --host=arm-apple-darwin
我想指出,这个确切的问题发生在我使用配置写字板的所有库.举几个例子：apr,apr-util,expat,log4cxx等…我甚至不知道所需的输出应该是什么.代码中间只有一个奇怪的“语法错误”.难怪它不编译:).
帮助和提示如何进行将不胜感激.
谢谢.
解决方法
我遇到同样的问题.经过一些戳,我的问题原来是我明确地设置CPP.不要设置(实际上,如果设置了’unset’).如果没有设置,配置会默认尝试$CC -E.如果设置,configure不会自动添加-E.此外,将CPPFLAGS设置为-E不起作用,因为这些标志也被传递到其他步骤.
