I was trying to cross compile from snow leopard to iphone simulator. struggled a few days with "file was built for i386 which is not the architecture being linked (x86_64)". and found http://www.itk.org/Bug/view.php?id=9466 bug history.
looks like the same bug popped up in 2.8.2 version. The error was gone with 2.6.4 Below is the full bug. -- The C compiler identification is GNU -- The CXX compiler identification is GNU -- Check for working C compiler: /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 -- Check for working C compiler: /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 -- broken CMake Error at /Applications/CMake 2.8-2.app/Contents/share/cmake-2.8/Modules/CMakeTestCCompiler.cmake:52 (MESSAGE): The C compiler "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2" is not able to compile a simple test program. It fails with the following output: Change Dir: /Users/eugenekim/Documents/BrainGame/CMakeFiles/CMakeTmp Run Build Command:/usr/bin/make "cmTryCompileExec/fast" /usr/bin/make -f CMakeFiles/cmTryCompileExec.dir/build.make CMakeFiles/cmTryCompileExec.dir/build "/Applications/CMake 2.8-2.app/Contents/bin/cmake" -E cmake_progress_report /Users/eugenekim/Documents/BrainGame/CMakeFiles/CMakeTmp/CMakeFiles 1 Building C object CMakeFiles/cmTryCompileExec.dir/testCCompiler.c.obj /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 -I/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.0.sdk/usr/include -I/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.0.sdk/opt/iphone-simulator-4.0/include -I/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.0.sdk/usr/local/iphone-simulator-4.0/include -pipe -no-cpp-precomp --sysroot=/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.0.sdk -miphoneos-version-min=4.0 -o CMakeFiles/cmTryCompileExec.dir/testCCompiler.c.obj -c /Users/eugenekim/Documents/BrainGame/CMakeFiles/CMakeTmp/testCCompiler.c Linking C executable cmTryCompileExec "/Applications/CMake 2.8-2.app/Contents/bin/cmake" -E cmake_link_script CMakeFiles/cmTryCompileExec.dir/link.txt --verbose=1 /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 CMakeFiles/cmTryCompileExec.dir/testCCompiler.c.obj -o cmTryCompileExec -L/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.0.sdk/usr/lib -L/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.0.sdk/opt/iphone-simulator-4.0/lib -L/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.0.sdk/usr/local/iphone-simulator-4.0/lib ld: warning: in /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.0.sdk/usr/lib/libSystem.dylib, file was built for i386 which is not the architecture being linked (x86_64) Undefined symbols: "_exit", referenced from: start in crt1.10.6.o ld: symbol(s) not found collect2: ld returned 1 exit status make[1]: *** [cmTryCompileExec] Error 1 make: *** [cmTryCompileExec/fast] Error 2 CMake will not be able to correctly generate this project. Call Stack (most recent call first): CMakeLists.txt:6 (project) -- Configuring incomplete, errors occurred! toolchain file # Michael Aaron Safyan (michaelsaf...@gmail.com). Copyright (C) 2009-2010. Simplified BSD License. SET (CMAKE_SYSTEM_NAME Generic) SET (CMAKE_SYSTEM_VERSION 1) SET (CMAKE_SYSTEM_PROCESSOR i686) SET_PROPERTY(GLOBAL PROPERTY TARGET_SUPPORTS_SHARED_LIBS TRUE) SET (SDKVER "4.0") SET (DEVROOT "/Developer/Platforms/iPhoneSimulator.platform/Developer") SET (SDKROOT "${DEVROOT}/SDKs/iPhoneSimulator${SDKVER}.sdk") SET (CMAKE_OSX_SYSROOT "${SDKROOT}") #SET (CMAKE_OSX_ARCHITECTURES "i386" "x86_64") SET (CMAKE_OSX_ARCHITECTURES "i386") SET (CMAKE_C_COMPILER "${DEVROOT}/usr/bin/gcc-4.2") SET (CMAKE_CXX_COMPILER "${DEVROOT}/usr/bin/g++-4.2") SET (CMAKE_C_COMPILER "${DEVROOT}/usr/bin/gcc-4.2") SET (CMAKE_CXX_COMPILER "${DEVROOT}/usr/bin/g++-4.2") SET (CMAKE_C_FLAGS "-std=c99" "-x objective-c") SET (CMAKE_C_FLAGS_DEBUG ${CMAKE_C_FLAGS} "-DDEBUG=1" "-ggdb") SET (CMAKE_C_FLAGS_RELEASE ${CMAKE_C_FLAGS} "-DNDEBUG=1") SET (CMAKE_C_FLAGS_RELWITHDEBINFO ${CMAKE_C_FLAGS} "-DNDEBUG=1" "-ggdb") SET (CMAKE_CXX_FLAGS "-x objective-c++") SET (CMAKE_CXX_FLAGS_DEBUG ${CMAKE_CXX_FLAGS} "-DDEBUG=1" "-ggdb") SET (CMAKE_CXX_FLAGS_RELEASE ${CMAKE_CXX_FLAGS} "-DNDEBUG=1") SET (CMAKE_CXX_FLAGS_RELWITHDEBINFO ${CMAKE_CXX_FLAGS} "-DNDEBUG=1" "-ggdb") #ADD_DEFINITIONS("-arch i386") #ADD_DEFINITIONS("-arch x86_64") ADD_DEFINITIONS("-pipe") ADD_DEFINITIONS("-no-cpp-precomp") ADD_DEFINITIONS("--sysroot=${SDKROOT}") ADD_DEFINITIONS("-miphoneos-version-min=${SDKVER}") INCLUDE_DIRECTORIES(SYSTEM "${SDKROOT}/usr/include") INCLUDE_DIRECTORIES(SYSTEM "${SDKROOT}/opt/iphone-simulator-${SDKVER}/include") INCLUDE_DIRECTORIES(SYSTEM "${SDKROOT}/usr/local/iphone-simulator-${SDKVER}/include") LINK_DIRECTORIES("${SDKROOT}/usr/lib") LINK_DIRECTORIES("${SDKROOT}/opt/iphone-simulator-${SDKVER}/lib") LINK_DIRECTORIES("${SDKROOT}/usr/local/iphone-simulator-${SDKVER}/lib") SET (CMAKE_FIND_ROOT_PATH "${SDKROOT}" "/opt/iphone-simulator-${SDKVER}/" "/usr/local/iphone-simulator-${SDKVER}/") SET (CMAKE_FIND_ROOT_PATH_MODE_PROGRAM BOTH) SET (CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY) SET (CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY) SET (iPhone 1) SET (iPhoneSimulator 1) SET (iPhoneSimulator_VERSION ${SDKVER})
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