MantisBT - CMake
View Issue Details
IDProjectCategoryView StatusDate SubmittedLast Update
0011682CMakeCMakepublic2011-01-11 08:322011-01-15 20:56
ReporterMaddes 
Assigned ToBrad King 
PrioritynormalSeverityfeatureReproducibilityN/A
StatusclosedResolutionduplicate 
PlatformMinGW/GCCOSWindows XPOS Versionx86, SP3
Product VersionCMake 2.8.3 
Target VersionFixed in Version 
Summary0011682: [enhancement] Add GNU versions for CMakeLists.txt processing, just like MSVC_VERSION
DescriptionIt would be great to determine the version of the GNU compiler, so that options can be avoided for older/newer versions of GCC and G++ (e.g. -Wextra, etc.).
A similar variable for VisualC++ already exists: MSVC_VERSION.

GCC/G++ already provide their version number via the macro definitions __GNUC__ (=major), __GNUC_MINOR__, __GNUC_PATCHLEVEL__.

Having GNU<LANG>_MAJOR, GNU<LANG>_MINOR, GNU<LANG>_PATCHLEVEL available for use in CMakeLists.txt would be very useful.
Steps To Reproduce
Additional Information
TagsNo tags attached.
Relationships
duplicate of 0006251closed Brad King Provide compiler version information 
Attached Files
Issue History
Date ModifiedUsernameFieldChange
2011-01-11 08:32MaddesNew Issue
2011-01-11 08:41Brad KingRelationship addedduplicate of 0006251
2011-01-11 08:47Brad KingNote Added: 0024575
2011-01-11 08:47Brad KingStatusnew => closed
2011-01-11 08:47Brad KingAssigned To => Brad King
2011-01-11 08:47Brad KingResolutionopen => duplicate

Notes
(0024575)
Brad King   
2011-01-11 08:47   
This would be a great feature.

Closing as duplicate of 0006251. You can monitor that issue instead.

Here are some alternatives to use for your case, useful when CMAKE_C_COMPILER_ID is GNU:

 - Use execute_process to run "gcc --version"
 - Do your own try_compile to detect the GCC version number
 - Use the CheckCCompilerFlag to detect support for specific flags