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-rw-r--r--configure.ac4
1 files changed, 3 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac
index 06e82b8ab..9c36213c4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1027,7 +1027,9 @@ AS_CASE([$host_os_gui], [cygwin* | mingw*], [
AC_DEFINE([HAVE_GL_GLU_H])
GLLIBS="$($PKGCONFIG --libs glu) $GLLIBS"
])
- GLWLDEMO="egl"
+ AC_CHECK_LIB([GL], [glXGetProcAddressARB], [AC_DEFINE([HAVE_GLXGETPROCADDRESSARB])
+ ],, [-lm])
+ GLWLDEMO="egl"
], [
LINKFLTKGL=""
GLLIBNAME=""