MantisBT - CMake
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IDProjectCategoryView StatusDate SubmittedLast Update
0013050CMakeModulespublic2012-03-18 04:412012-09-03 16:00
ReporterDavide Barbieri 
Assigned ToBrad King 
PrioritynormalSeverityminorReproducibilityalways
StatusclosedResolutionno change required 
PlatformX86OSWindowsOS Version7
Product VersionCMake 2.8.7 
Target VersionFixed in Version 
Summary0013050: FindOpenGL not working on Cygwin
Descriptionfind_package(OpenGL) is not working on cygwin with cmake 2.8.7.

Probably, because in the newer versions of cmake you don't define
WIN32 no more.
But you still use it for FindOpenGL.cmake:

IF (WIN32)
  IF (CYGWIN)
    FIND_PATH(OPENGL_INCLUDE_DIR GL/gl.h )
    FIND_LIBRARY(OPENGL_gl_LIBRARY opengl32 )
    FIND_LIBRARY(OPENGL_glu_LIBRARY glu32 )
  ELSE (CYGWIN)
...

using directly the find_library macro, it works..
Steps To Reproducefind_package(OpenGL)
Additional Information
TagsNo tags attached.
Relationships
related to 0010122closed Brad King Patches for Cygwin 
Attached Files
Issue History
Date ModifiedUsernameFieldChange
2012-03-18 04:41Davide BarbieriNew Issue
2012-03-19 09:21Brad KingRelationship addedrelated to 0010122
2012-03-19 09:21Brad KingNote Added: 0028934
2012-03-19 09:23Brad KingNote Added: 0028935
2012-03-19 20:30Davide BarbieriNote Added: 0028939
2012-03-19 20:31Davide BarbieriNote Deleted: 0028939
2012-03-19 20:58Davide BarbieriNote Added: 0028940
2012-03-20 08:40Brad KingNote Added: 0028941
2012-03-20 08:40Brad KingStatusnew => resolved
2012-03-20 08:40Brad KingResolutionopen => no change required
2012-03-20 08:40Brad KingAssigned To => Brad King
2012-09-03 16:00David ColeNote Added: 0030838
2012-09-03 16:00David ColeStatusresolved => closed

Notes
(0028934)
Brad King   
2012-03-19 09:21   
This commit:

  http://cmake.org/gitweb?p=cmake.git;a=commitdiff;h=85c0a69a [^]

removed the definition of WIN32 for issue 0010122.
(0028935)
Brad King   
2012-03-19 09:23   
The FindOpenGL code path in question is left from when Cygwin packages could use the Windows GL. Cygwin now always builds packages against the X11 GL libraries. Install that package and the else(WIN32)/else(APPLE) block will find them.
(0028940)
Davide Barbieri   
2012-03-19 20:58   
Ok, in fact I was using:
/usr/lib/w32api/libopengl32.a
(0028941)
Brad King   
2012-03-20 08:40   
Cygwin upstream has moved toward X11-only (the Tcl/Tk package switched recently IIUC). If you *do* want to use the Windows one then you can set CMAKE_LEGACY_CYGWIN_WIN32 to tell CMake to treat Cygwin like Windows which will define WIN32 and take the old code path in FindOpenGL. Otherwise just pass -DOPENGL_gl_LIBRARY=/usr/lib/w32api/libopengl32.a and other relevant options to tell CMake what GL to use.
(0030838)
David Cole   
2012-09-03 16:00   
Closing resolved issues that have not been updated in more than 4 months.