MantisBT - CMake
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IDProjectCategoryView StatusDate SubmittedLast Update
0015913CMakeCMakepublic2016-01-12 16:292016-06-10 14:21
ReporterGregory M. Baumgardner 
Assigned To 
PrioritynormalSeverityminorReproducibilityalways
StatusclosedResolutionno change required 
PlatformCYGWIN-2.3.1(0.291/5/3)OSWindows OS Version7
Product VersionCMake 3.3.2 
Target VersionFixed in Version 
Summary0015913: CMAKE_SYSTEM_NAME is not being set on cmake 3.3.2 Cygwin
DescriptionI installed cmake 3.3.2 directly from the Cygwin distribution, but for some reason I cannot get the if(CYGWIN) to work properly. It is probably related to the fact that the the CMAKE_SYSTEM_NAME is not being set. I have confirmed this with a quick test, but have no idea what is wrong or why I cannot detect Cygwin. The --system-information shows that the CMAKE_SYSTEM_NAME=CYGWIN, but it is not being set the same when I run cmake against my CMakeLists.txt file. It would be nice to have this feature worked as advertised.
Steps To ReproduceRun "cmake ." using supplied CMakeLists.txt file. Output is:

-- Hello World
-- Cygwin is and CMAKE_COMPILER_IS_CYGWIN = and CMAKE_SYSTEM_NAME =

I expected that it should read:

-- Hello World
-- Cygwin is 1 and CMAKE_COMPILER_IS_CYGWIN = 1 and CMAKE_SYSTEM_NAME = CYGWIN
Additional InformationAvoid ctest truncation of output: CTEST_FULL_OUTPUT
========================================================
=== MAIN VARIABLES
========================================================
CMAKE_STATIC_LIBRARY_PREFIX == "lib"
CMAKE_STATIC_LIBRARY_SUFFIX == ".a"
CMAKE_SHARED_LIBRARY_PREFIX == "cyg"
CMAKE_SHARED_LIBRARY_SUFFIX == ".dll"
CMAKE_SHARED_MODULE_PREFIX == "cyg"
CMAKE_SHARED_MODULE_SUFFIX == ".dll"


CMAKE_DL_LIBS == "dl"
CMAKE_LIBRARY_PATH_FLAG == "-L"
CMAKE_LINK_LIBRARY_FLAG == "-l"
CMAKE_SKIP_RPATH == "NO"
CMAKE_SYSTEM_INFO_FILE == "Platform/CYGWIN"
CMAKE_SYSTEM_NAME == "CYGWIN"
CMAKE_SYSTEM == "CYGWIN-2.3.1(0.291/5/3)"
CMAKE_CXX_COMPILER == "/usr/bin/c++.exe"
CMAKE_C_COMPILER == "/usr/bin/cc"
CMAKE_COMPILER_IS_GNUCC == "1"
CMAKE_COMPILER_IS_GNUCXX == "1"

....
CMAKE_COMPILER_IS_CYGWIN "1"
CYGWIN "1"

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Attached Filestxt CMakeLists.txt (244) 2016-01-12 16:29
https://public.kitware.com/Bug/file/5609/CMakeLists.txt
Issue History
Date ModifiedUsernameFieldChange
2016-01-12 16:29Gregory M. BaumgardnerNew Issue
2016-01-12 16:29Gregory M. BaumgardnerFile Added: CMakeLists.txt
2016-01-12 17:43Nils GladitzNote Added: 0040212
2016-01-13 08:52Gregory M. BaumgardnerNote Added: 0040215
2016-01-13 09:13Brad KingStatusnew => resolved
2016-01-13 09:13Brad KingResolutionopen => no change required
2016-06-10 14:21Kitware RobotNote Added: 0041292
2016-06-10 14:21Kitware RobotStatusresolved => closed

Notes
(0040212)
Nils Gladitz   
2016-01-12 17:43   
Try moving your project() call before message().

project() is what initializes platform and compiler information.
(0040215)
Gregory M. Baumgardner   
2016-01-13 08:52   
Ok. I was unaware of that. It makes sense now. This issue can be closed.
(0041292)
Kitware Robot   
2016-06-10 14:21   
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