The following issue has been SUBMITTED.
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http://public.kitware.com/Bug/view.php?id=12258
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Reported By: Campbell Barton
Assigned To:
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Project: CMake
Issue ID: 12258
Category: CMake
Reproducibility: always
Severity: minor
Priority: normal
Status: new
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Date Submitted: 2011-06-09 00:42 EDT
Last Modified: 2011-06-09 00:42 EDT
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Summary: include_directories(SYSTEM ...) not functional with
GNU Makefiles
Description:
There were some system headers giving warnings compiling on linux,
since I like to have warnings as errors, and not edit system headers,
I used:
include_directories(SYSTEM dir1 dir2 ...)
... for system directories only.
However this does not result in -isystem being used in C because
GNU.cmake does not set:
set(CMAKE_INCLUDE_SYSTEM_FLAG_C "-isystem ")
... as it does for C++.
I tried adding this directly after the project(), call (beforehand it
fails to have any effect):
if(CMAKE_COMPILER_IS_GNUCC)
if(NOT APPLE)
set(CMAKE_INCLUDE_SYSTEM_FLAG_C "-isystem ")
endif()
endif()
So now it almost works, but I've noticed that If
"include_directories(SYSTEM" is called after a non system include, ALL
includes then use -isystem.
Putting "include_directories(SYSTEM" first mostly works out OK, but I
found a few cases where the order isn't so easy to set in our own
CMakeLists.txt and still incorrectly uses -isystem where it shouldn't.
Also found using the BEFORE / AFTER arguments to include_directories(
doesn't make any difference to the use of -isystem.
Is this a known problem or is there a way to get this working?
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Issue History
Date Modified Username Field Change
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2011-06-09 00:42 Campbell BartonNew Issue
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