Eclipse indexer proper c++11 syntax highlighting when generating projects with cmake

Question

I know you can enable proper syntax highlighting with the GXX_EXPERIMENTAL hack described here: Eclipse CDT indexer does not know C++11 containers

But i think, when gene

Answer 1

As already mentioned, the invocation of the project generators runs before the parsing of the CMakeLists.txt. Thus, any definitions inside of CMakeLists.txt don't have any effect on the generated project files.

In case of eclipse-project generation, the capabilities of the compiler are requested inside CMakeExtraGeneratorDetermineCompilerMacrosAndIncludeDirs.cmake. In line 23 the variable CMAKE_CXX_FLAGS is parsed which is evaluated in line 30. Especially this CMAKE_CXX_FLAGS variable can only be set while invoking cmake from command line.

Recommodation of proper cmake invokation: cmake -G"Eclipse CDT4 - Unix Makefiles" -DCMAKE_CXX_FLAGS="-std=c++11" (or replace c++11 with eg. c++14 or any other standard you like)

Hint: The result from evaluating line 30 can be seen from running the following command as an example: touch /tmp/dummy; /usr/bin/c++ -v -E -x c++ -std=c++11 -dD /tmp/dummy. It outputs all the defines from the compiler which are parsed into the eclipse-project:

...
#define __STDC__ 1
#define __cplusplus 201103L
...