# Building 2.7.7 fails on kubuntu\_12\_04

**URL:** <https://discourse.glfw.org/t/building-2-7-7-fails-on-kubuntu-12-04/530>\
**Category:** support\
**Created:** [February 26, 2013, 1:02am UTC](https://discourse.glfw.org/t/building-2-7-7-fails-on-kubuntu-12-04/530 "2013-02-26T01:02:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![system](https://canada1.discourse-cdn.com/flex035/uploads/glfw/original/1X/b8cdefe6b61b8d5aee6c43b2c56e9cf5eabecfe4.svg) [@system](https://discourse.glfw.org/u/system)\
**Post date:** [February 26, 2013, 1:02am UTC](https://discourse.glfw.org/t/building-2-7-7-fails-on-kubuntu-12-04/530/1 "2013-02-26T01:02:40Z")

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**[xxcger](https://sourceforge.net/u/xxcger/)** wrote on [Tuesday, February 26, 2013](https://sourceforge.net/p/glfw/discussion/247562/thread/058ace94/#9b50):

Hello,

I got an error after run “make x11” :

Checking what kind of system this is… Linux  
Checking for X11 libraries location… unknown (assuming linker will find them)  
Checking whether we are using GNU C… yes  
Checking for X11 RandR support… yes  
Checking for pthread support… yes  
Checking for sched\_yield… yes  
Checking for clock\_gettime… yes  
Checking for glXGetProcAddress variants… glXGetProcAddress  
Checking for sysconf… yes  
Checking for sysctl support… no  
Creating ./lib/x11/Makefile.x11  
Creating ./examples/Makefile.x11  
Creating ./tests/Makefile.x11  
Creating ./lib/x11/libglfw.pc.in  
cd lib/x11 && make -f Makefile.x11  
make[1]: Entering directory `/local1/opengl/glfw-2.7.7/lib/x11' cc -c -I. -I.. -D_GLFW_USE_LINUX_JOYSTICKS -D_GLFW_HAS_XRANDR -D_GLFW_HAS_PTHREAD -D_GLFW_HAS_SCHED_YIELD -D_GLFW_HAS_GLXGETPROCADDRESS -D_GLFW_HAS_SYSCONF -pthread -O2 -Wall -o enable.o ../enable.c In file included from ../internal.h:92:0, from ../enable.c:31: ./platform.h:300:5: error: unknown type name ‘PFNGLXSWAPINTERVALMESAPROC’ make[1]: *** [enable.o] Error 1 make[1]: Leaving directory`/local1/opengl/glfw-2.7.7/lib/x11’  
make: \*\*\* [x11] Error 2

Is it because x11 libraries location is not found? where can I configure them?

Thanks a lot!

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**Author:** ![system](https://canada1.discourse-cdn.com/flex035/uploads/glfw/original/1X/b8cdefe6b61b8d5aee6c43b2c56e9cf5eabecfe4.svg) [@system](https://discourse.glfw.org/u/system)\
**Post date:** [March 19, 2013, 10:28pm UTC](https://discourse.glfw.org/t/building-2-7-7-fails-on-kubuntu-12-04/530/2 "2013-03-19T22:28:17Z")

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**[elmindreda](https://sourceforge.net/u/elmindreda/)** wrote on [Tuesday, March 19, 2013](https://sourceforge.net/p/glfw/discussion/247562/thread/058ace94/#e352):

That seems to be a bug in 2.7.7. It has been fixed in what will become 2.7.8. You can get it right away from the Subversion repository trunk.