gtest_discover_tests 的 LD_LIBRARY_PATH（在 QtCreator 中？）

Question

我有一个 CMAKE 项目，其中包含两个子目录：库和测试。当枚举测试时，gtest_discover_tests 运行测试可执行文件，但由于测试可执行文件位于正在测试的库的同级目录中，因此似乎找不到它。如果我通过终端运行它并设置 LD_LIBRARY_PATH 它运行正常。有没有一种 CMAKE 方法可以为编译过程设置 LD_LIBRARY_PATH ？我可以在我的 IDE 中强制它，但这对于尝试编译它的其他人来说很脆弱。

foo/CMakeLists.txt

cmake_minimum_required(VERSION 3.10)

project(foo)

add_subdirectory(library)
add_subdirectory(tests)

foo/library/CMakeLists.txt

add_library(foo SHARED foo.cpp foo.h)

foo/tests/CMakeLists.txt

enable_testing()

include(FetchContent)
FetchContent_Declare(
  googletest
  URL https://github.com/google/googletest/archive/609281088cfefc76f9d0ce82e1ff6c30cc3591e5.zip
)

FetchContent_MakeAvailable(googletest)

include_directories(../library)

add_executable(foo_test foo_test.cpp)
target_link_libraries(foo_test PRIVATE gtest_main foo)

include(GoogleTest)
gtest_discover_tests(foo_test)

准确的错误输出

[1/1 5.1/sec] Linking CXX executable tests/foo_test
FAILED: tests/foo_test tests/foo_test[1]_tests.cmake 
: && /usr/lib/ccache/clang++-11 --target=x86_64-pc-linux-gnu --sysroot=/ -g  tests/CMakeFiles/foo_test.dir/foo_test.cpp.o -o tests/foo_test -L/home/adam/workspace-qt/foo/tests/../library -Wl,-rpath,home/adam/workspace-qt/foo/tests/../library:home/adam/workspace-qt/build-foo-Clang_Desktop-Debug/library  lib/libgtest_maind.a  library/libfoo.so  mbedtls/library/libmbedtls.a  lib/libgtestd.a  -lpthread  mbedtls/library/libmbedx509.a  mbedtls/library/libmbedcrypto.a && cd /home/adam/workspace-qt/build-foo-Clang_Desktop-Debug/tests && /home/adam/Qt/Tools/CMake/bin/cmake -D TEST_TARGET=foo_test -D TEST_EXECUTABLE=/home/adam/workspace-qt/build-foo-Clang_Desktop-Debug/tests/foo_test -D TEST_EXECUTOR= -D TEST_WORKING_DIR=/home/adam/workspace-qt/build-foo-Clang_Desktop-Debug/tests -D TEST_EXTRA_ARGS= -D TEST_PROPERTIES= -D TEST_PREFIX= -D TEST_SUFFIX= -D NO_PRETTY_TYPES=FALSE -D NO_PRETTY_VALUES=FALSE -D TEST_LIST=foo_test_TESTS -D CTEST_FILE=/home/adam/workspace-qt/build-foo-Clang_Desktop-Debug/tests/foo_test[1]_tests.cmake -D TEST_DISCOVERY_TIMEOUT=5 -D TEST_XML_OUTPUT_DIR= -P /home/adam/Qt/Tools/CMake/share/cmake-3.19/Modules/GoogleTestAddTests.cmake
/home/adam/workspace-qt/build-foo-Clang_Desktop-Debug/tests/foo_test: error while loading shared libraries: libfoo.so: cannot open shared object file: No such file or directory
CMake Error at /home/adam/Qt/Tools/CMake/share/cmake-3.19/Modules/GoogleTestAddTests.cmake:77 (message):
  Error running test executable.

    Path: '/home/adam/workspace-qt/build-foo-Clang_Desktop-Debug/tests/foo_test'
    Result: 127
    Output:
      

Call Stack (most recent call first):
  /home/adam/Qt/Tools/CMake/share/cmake-3.19/Modules/GoogleTestAddTests.cmake:173 (gtest_discover_tests_impl)


ninja: build stopped: subcommand failed.
15:56:10: The process "/home/adam/Qt/Tools/CMake/bin/cmake" exited with code 1.
Error while building/deploying project foo (kit: Clang-Desktop)
When executing step "Build"
15:56:10: Elapsed time: 00:01.

编辑：

与 @Tsyvarev 的讨论表明 QtCreator 可能没有在 RPATH/RUNPATH 中放置完全限定的路径。 （即“home/...”而不是“/home/...”）。

Answer 1

我也遇到过类似的问题。我的解决方法是为您的案例中的

foo

库添加 RPATH。那么gtest就不需要设置

LD_LIBRARY_PATH 

了。这可以通过在安装

CMAKE_INSTALL_RPATH

库时设置

foo

来完成。