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João Valverde 640382c743 CMake: Allow setting per target compiler warnings 
Setting our compiler warning flags in CMAKE_C_FLAGS does not allow
using different flags per target.

Allow for that possibility by setting the internal WS_WARNINGS_{C,CXX}_FLAGS
and using the COMPILE_OPTIONS property to set them.

This change is just setting mechanism and there should be no difference
in generated warnings.

The check_X_compiler_flag cmake test is changed to test each flag individually.
We need a list, not a space separated string, and the aggregate test is not
significant.

Change-Id: I59fc5cd7e130c7a5e001c598e3df3e13f83a6a25
Reviewed-on: https://code.wireshark.org/review/17150
Petri-Dish: João Valverde <j@v6e.pt>
Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org>
Reviewed-by: João Valverde <j@v6e.pt>
 		2016-08-23 21:33:09 +00:00
..
modules CMake: Allow setting per target compiler warnings 2016-08-23 21:33:09 +00:00
TestFileOffsetBits.c cmake: Detect proper large file defines even with -Wno-error 2016-06-16 04:02:43 +00:00
TestLargeFiles.c.cmakein cmake: Detect proper large file defines even with -Wno-error 2016-06-16 04:02:43 +00:00
TestWindowsFSeek.c
…