linux - CMake 警告与隐式目录中的库发生冲突

Question

我有一个使用“buildroot 2013.02”和“Sourcery CodeBench ARM 2012.09”创建的交叉工具链。在这个工具链中，我有两次库 libX11.so:

• at/opt/...linux-gnueabi/sysroot/usr/lib 是要与目标文件链接的 ARM 对象
• 在/opt/vibkart/toolchain-arm/usr/lib 是与主机文件链接的 x86-64 对象

出于某种原因，cmake 混淆了路径，我收到了这个警告:

CMake Warning at CMakeLists.txt:194 (add_executable):
  Cannot generate a safe runtime search path for target vibkart because
  files in some directories may conflict with libraries in implicit
  directories:

    runtime library [libX11.so.6] in /opt/vibkart/toolchain-arm/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib may be hidden by files in:
      /opt/vibkart/toolchain-arm/usr/lib

  Some of these libraries may not be found correctly.

我正在使用以下工具链文件.cmake:

set(CMAKE_SYSTEM_NAME Linux)
set(CMAKE_C_COMPILER /opt/vibkart/toolchain-arm/usr/bin/arm-none-linux-gnueabi-gcc)
set(CMAKE_CXX_COMPILER /opt/vibkart/toolchain-arm/usr/bin/arm-none-linux-gnueabi-g++)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -pipe -mfloat-abi=softfp -mfpu=neon -march=armv7-a -mtune=cortex-a8 -O2 " CACHE STRING "Buildroot CFLAGS" FORCE)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -pipe -mfloat-abi=softfp -mfpu=neon -march=armv7-a -mtune=cortex-a8 -O2 " CACHE STRING "Buildroot CXXFLAGS" FORCE)
set(CMAKE_INSTALL_SO_NO_EXE 0)
set(CMAKE_PROGRAM_PATH "/opt/vibkart/toolchain-arm/usr/bin")
set(CMAKE_FIND_ROOT_PATH "/opt/vibkart/toolchain-arm/usr/arm-buildroot-linux-gnueabi/sysroot")
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
set(ENV{PKG_CONFIG_SYSROOT_DIR} "/opt/vibkart/toolchain-arm/usr/arm-buildroot-linux-gnueabi/sysroot")
set(OPENGL_INCLUDE_DIR "/opt/vibkart/toolchain-arm/usr/include/")
set(OPENGL_gl_LIBRARY "/opt/vibkart/toolchain-arm/usr/lib/libGLESv2.so")

问题:

1. 这些路径在哪里定义的？
2. 如何从交叉编译中排除 x86 库路径？

提前致谢!

Answer 1

感谢Brad King我意识到每当我链接到该目录的库时都会添加该路径。

由于 toolchainfile.cmake 中的条目错误，添加了 x86-64 路径。因此，更改以下行解决了问题:

-set(OPENGL_INCLUDE_DIR "/opt/vibkart/toolchain-arm/usr/include/")
+set(OPENGL_INCLUDE_DIR "/opt/vibkart/toolchain-arm/usr/arm-buildroot-linux-gnueabi/sysroot/usr/include/")
-set(OPENGL_gl_LIBRARY "/opt/vibkart/toolchain-arm/usr/lib/libGLESv2.so")
+set(OPENGL_gl_LIBRARY "/opt/vibkart/toolchain-arm/usr/arm-buildroot-linux-gnueabi/sysroot/usr/lib/libGLESv2.so")