MantisBT - CMake
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IDProjectCategoryView StatusDate SubmittedLast Update
0013551CMakeDocumentationpublic2012-09-20 08:382016-06-10 14:31
ReporterSylwester Arabas 
Assigned ToKitware Robot 
PrioritynormalSeveritytextReproducibilityalways
StatusclosedResolutionmoved 
PlatformOSOS Version
Product Version 
Target VersionFixed in Version 
Summary0013551: CMAKE_COMPILER_IS_GNUCXX: mention in the documentation when it starts to be available
DescriptionApparently this variable may only be used after the project() command in CMakeLists.txt... perhaps that's quite obvious but still mentioning it in the docs (e.g. just before the list of "Variables for Languages") might save someone some time. Example below.

HTH,
Sylwester
Steps To Reproduce$ cat CMakeLists.txt
cmake_minimum_required(VERSION 2.8)

if(CMAKE_COMPILER_IS_GNUCXX)
  message("compiler detected as: GNU compiler")
else()
  message("compiler detected as: non-GNU compiler")
endif()

project(test CXX)

execute_process(COMMAND "${CMAKE_CXX_COMPILER}" "--version" COMMAND "head" "-1" OUTPUT_VARIABLE CXX_VERSION OUTPUT_STRIP_TRAILING_WHITESPACE)
message("compiler: ${CMAKE_CXX_COMPILER}")
message("version: ${CXX_VERSION}")


$ cmake .
compiler detected as: non-GNU compiler
-- The CXX compiler identification is GNU 4.7.1
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
compiler: /usr/bin/c++
version: c++ (Debian 4.7.1-6) 4.7.1
-- Configuring done
-- Generating done
-- Build files have been written to: /home/slayoo/Temp/test
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Issue History
Date ModifiedUsernameFieldChange
2012-09-20 08:38Sylwester ArabasNew Issue
2016-06-10 14:28Kitware RobotNote Added: 0042123
2016-06-10 14:28Kitware RobotStatusnew => resolved
2016-06-10 14:28Kitware RobotResolutionopen => moved
2016-06-10 14:28Kitware RobotAssigned To => Kitware Robot
2016-06-10 14:31Kitware RobotStatusresolved => closed

Notes
(0042123)
Kitware Robot   
2016-06-10 14:28   
Resolving issue as `moved`.

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