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使用Google Test编译程序时“ g ++并非完整路径”

[英]“g++ is not a full path” when compiling a program using Google Test

我正在尝试使用g ++编译使用Google Test作为子模块的程序。 这是我尝试过的:

git init testgoogletest
cd testgoogletest
git submodule add https://github.com/google/googletest.git

然后,我创建了一个CMakeLists.txt,其中包含:

cmake_minimum_required (VERSION 3.5.1)
project(try_googletest)

set(CMAKE_CXX_COMPILER g++)

set(VARIABLE_INCLUDE_DIR "${gtest_SOURCE_DIR}/include" "${gmock_SOURCE_DIR}/include")
add_subdirectory(../googletest gtest)

target_include_directories(gmock_main SYSTEM BEFORE INTERFACE
    "${gtest_SOURCE_DIR}/include" "${gmock_SOURCE_DIR}/include")

add_executable(my_executable test.cpp)
target_link_libraries(my_executable PRIVATE gmock_main)

还有一个名为test.cpp的文件,其中包含:

#include "gtest/gtest.h"
#include "gmock/gmock.h"

TEST(SimpleTest, works) {
    EXPECT_TRUE(true);
}

然后,我运行了命令:

mkdir build
cd build
cmake ..

而且我遇到了以下致命错误:

CMake Error at (personal path)/googletest/CMakeLists.txt:7 (project):
  The CMAKE_CXX_COMPILER:

    g++

  is not a full path and was not found in the PATH.

  Tell CMake where to find the compiler by setting either the environment
  variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
  to the compiler, or to the compiler name if it is in the PATH.

但是,当我运行which g++ ,我得到了/usr/bin/g++ ,这意味着编译器名称在PATH中,并且CMake应该找到它。 我什至尝试了以下方法:

  • 删除Google Test并将test.cpp用一个空的main替​​换,这很正常,这意味着问题与Google Test有关
  • /usr/bin/g++替换CMakeLists.txt g++ ,运行cmake ..时会产生无限大的周期性输出cmake ..

我的问题是:

  • 为什么会出现这些错误?
  • 是否存在解决方案,或者我真的需要忘记CMAKE_CXX_COMPILER而是使用CXX吗?

我按照你的步骤。 我们确实得到了一个无限循环,以及以下输出:

You have changed variables that require your cache to be deleted.
Configure will be re-run and you may have to reset some variables.
The following variables have changed:
CMAKE_CXX_COMPILER= /usr/bin/c++

以以下方式更改CMakeLists.txt文件中的set似乎可以解决此问题:

set(CMAKE_CXX_COMPILER /usr/bin/c++)

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