Question

我为Linaro工具链编写toolchain.cmake文件。

include(CMakeForceCompiler)
set(CMAKE_CROSSCOMPILING   TRUE)
set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_SYSTEM_VERSION 1)
set(CMAKE_SYSTEM_PROCESSOR "armv7-a")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC -Wno-psabi -frtti -fexceptions" )
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fPIC -Wno-psabi -fexceptions" )
set(CMAKE_C_COMPILER /home/stranger/linaro/android-toolchain-eabi/bin/arm-linux-androideabi-gcc)
set(CMAKE_CXX_COMPILER /home/stranger/linaro/android-toolchain-eabi/bin/arm-linux-androideabi-g++)
CMAKE_FORCE_C_COMPILER("${CMAKE_C_COMPILER}" GNU)
CMAKE_FORCE_CXX_COMPILER("${CMAKE_CXX_COMPILER}" GNU)
set(CMAKE_FIND_ROOT_PATH  home/stranger/linaro/android-toolchain-eabi/arm-linux-androideabi)
include_directories( SYSTEM /home/stranger/android-ndk-r8/platforms/android-14/arch-arm/usr/include)
include_directories( SYSTEM /home/stranger/android-ndk-r8/sources/cxx-stl/gnu-libstdc++/include)
include_directories( SYSTEM /home/stranger/android-ndk-r8/sources/cxx-stl/gnu-libstdc++/libs/armeabi-v7a/include)

我运行cmake：

cmake -DBUILD_ANDROID=On -DCMAKE_TOOLCHAIN_FILE=<path to this toolchain.cmake>  -DCMAKE_BUILD_TYPE=Release <path to my cmake project>

但是在编译时，我有关于异常的错误，而不是工具链文件中定义的编译器标志：

error: exception handling disabled, use -fexceptions to enable

据我所知，我的CMAKE_C_FLAGS_RELEASE，CMAKE_CXX_FLAGS_RELEASE无效。为什么呢？

Answer 1

问题解决了，我的错误。我在主项目中对set(CMAKE_CXX_FLAGS "<flags>")使用set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}<flags>"。我很困惑，因为这个CMakeLists.txt适用于android-cmake和Google-NDK（而不是所有的android-cmake工具链标志被拒绝）。

Cmake交叉编译标志

1 个答案: