For the record, the solution is (try_compile needs this option):
SET(CMAKE_REQUIRED_FLAGS "-std=c++11")
Is there a way to get this flag whatever the compiler to do this ?
[SET_TARGET_PROPERTIES(myTarget PROPERTIES CXX_STANDARD 11) seems to be
relevant only for target - flags are not available]
Franck
Le 2017-03-13 19:36, houssen a écrit :
Forgot to mention:
~> cmake --version
cmake version 3.5.0
Le 2017-03-13 19:33, houssen a écrit :
Hello,
I do NOT use /usr/bin/g++ that is installed in the system (long
story
- don't ask why).
I compiled gcc from source and installed it in
/my/path/local/bin/g++.
Now I need to check for tuple with CHECK_INCLUDE_FILE_CXX : it fails
!
Still failing if:
1. I export CPLUS_INCLUDE_PATH to point at
/my/path/local/include/c++/x.y.z (I checked: tuple is here)
2. set this before calling CHECK_INCLUDE_FILE_CXX :
SET ( CMAKE_REQUIRED_FLAGS "-I$ENV{CPLUS_INCLUDE_PATH}" )
SET ( CMAKE_REQUIRED_INCLUDES "$ENV{CPLUS_INCLUDE_PATH}" )
What is wrong ?
Franck
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