[cmake-developers] [CMake 0012652]: CMAKE_<LANG>_FLAGS are passed for linking too, but this causes warnings for compilation-only flags
Mantis Bug Tracker
mantis at public.kitware.com
Tue Jan 3 15:49:57 EST 2012
The following issue has been SUBMITTED.
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http://public.kitware.com/Bug/view.php?id=12652
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Reported By: Sean McBride
Assigned To:
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Project: CMake
Issue ID: 12652
Category: CMake
Reproducibility: always
Severity: minor
Priority: normal
Status: new
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Date Submitted: 2012-01-03 15:49 EST
Last Modified: 2012-01-03 15:49 EST
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Summary: CMAKE_<LANG>_FLAGS are passed for linking too, but
this causes warnings for compilation-only flags
Description:
Searching the archives, I see that CMake deliberately passes the
CMAKE_<LANG>_FLAGS for linking too:
<http://www.cmake.org/pipermail/cmake/2010-July/038090.html>
If I add -std=c++0x to CMAKE_CXX_FLAGS, then compilation is fine, but clang will
warn when linking:
clang-3: warning: argument unused during compilation: '-std=c++0x'
For one's own projects, one could do something like:
SET_SOURCE_FILES_PROPERTIES(${MYCPPS} PROPERTIES COMPILE_FLAGS --std=c++0x)
But my hope was to use --std=c++0x on my CMake/VTK/ITK dashboards to make sure
their codebases are foreword-compatible with the new language standard.
Above all, it seems weird that something named CMAKE_C_FLAGS is passed to the
linker when we already have CMAKE_EXE_LINKER_FLAGS and the like.
I realize changing this has compatibility implications.
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Issue History
Date Modified Username Field Change
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2012-01-03 15:49 Sean McBride New Issue
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