I tried to use gtest installed through conan, but ended up with an undefined reference linker error. This question is a more or less a follow up to this stackoverflow question. But I think the provided example was to simple. I compile under up to date arch linux x64, using gcc 6.3.
Could there be some missmatch of C++ versions? Or do you have any other idea of how to fix the Problem?
I will provide my source code in the following:
Directory tree:
tree
.
├── CMakeLists.txt
├── conanfile.txt
└── main.cpp
main.cpp:
#include <iostream>
#include <gtest/gtest.h>
class TestFixture : public ::testing::Test {
protected:
void SetUp(){
std::cout << "SetUp()" << std::endl;
}
void TearDown(){
std::cout << "TearDown()" << std::endl;
}
};
TEST_F (TestFixture, shouldCompile) {
std::cout << "shouldCompile" << std::endl;
ASSERT_TRUE(true); // works, maybe optimized out?
ASSERT_TRUE("hi" == "hallo"); // undefined reference
}
int main(int argc, char **argv) {
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
The CMakeLists.txt:
project(ConanGtestExample)
cmake_minimum_required(VERSION 2.8.12)
set(CMAKE_CXX_STANDARD 11)
include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
conan_basic_setup()
# Necessary to compile gtest
# - dependencies and final build
# need to be compiled with same
# build type. Otherwise linker
# error will occure.
set(CMAKE_BUILD_TYPE Release)
add_executable(main main.cpp)
target_link_libraries(main ${CONAN_LIBS})
The conanfile.txt:
[requires]
gtest/1.7.0@lasote/stable
[generators]
cmake
I tried to build the project with the following commands:
mkdir build
cd build
conan install -s build_type=Release .. --build=missing
cmake .. -DCMAKE_BUILD_TYPE=Release
cmake --build .
The undefined reference output:
Scanning dependencies of target main
[ 50%] Building CXX object CMakeFiles/main.dir/main.cpp.o
[100%] Linking CXX executable bin/main
CMakeFiles/main.dir/main.cpp.o: In function `TestFixture_shouldCompile_Test::TestBody()':
main.cpp:(.text+0x99): undefined reference to `testing::internal::GetBoolAssertionFailureMessage[abi:cxx11](testing::AssertionResult const&, char const*, char const*, char const*)'
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/main.dir/build.make:95: bin/main] Error 1
make[1]: *** [CMakeFiles/Makefile2:68: CMakeFiles/main.dir/all] Error 2
make: *** [Makefile:84: all] Error 2
