CMake和非标准扩展 [英] CMake and non-standard extensions

问题描述

我有一些C ++源代码，出于正当的理由，这些代码不会以 .cpp或 .cc或任何其他常见的C ++扩展名结尾。我想用CMake将其编译成可执行文件。

I have some C++ source code that, for a valid reason, does not end in ".cpp" or ".cc" or any other usual C++ extension. I would like to compile this into an executable with CMake.

我目前非常简单的CMake脚本是：

My very simple CMake script currently is:

CMAKE_MINIMUM_REQUIRED(VERSION 2.8)
PROJECT(test)

SET_SOURCE_FILES_PROPERTIES(test_mycode.foo PROPERTIES LANGUAGE CXX)

ADD_EXECUTABLE(test test_mycode.foo)

据我了解，SET_SOURCE_FILES_PROPERTIES（...）应该就是需要使Cmake将 test_mycode.foo识别为C ++文件。但是，当我尝试编译时，它失败并显示以下错误：

As far as I understand, SET_SOURCE_FILES_PROPERTIES(...) should be all that is needed to make Cmake recognize "test_mycode.foo" as a C++ file. However, when I try to compile, it fails with the following error:

/usr/bin/c++ -o CMakeFiles/test.dir/test_mycode.foo.o -c test/test_mycode.foo

c++: test/test_mycode.foo: linker input file unused because linking not done

我在这里做什么错了？

谢谢！

推荐答案

据我所知，CMake已将您的文件用作c ++，但gcc却没有。您还必须告诉CMake向编译器添加额外的标志（请参见此处： http： //gcc.gnu.org/onlinedocs/gcc/Overall-Options.html （用于-x选项），因此它将文件视为c ++代码。

As far as I can see CMake has used your file as c++ one, but gcc didn't. You will also have to tell CMake to add extra flags to compiler (look here: http://gcc.gnu.org/onlinedocs/gcc/Overall-Options.html for -x option) so it will treated your file as c++ code.

无论如何，恕我直言CMake应该自动执行此操作。

Anyway IMHO CMake should do it automatically.

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