Determining if files glib/gregex.h exist failed with the following output:
Change Dir: /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp

Run Build Command:/usr/bin/make "cmTryCompileExec797814242/fast"
/usr/bin/make -f CMakeFiles/cmTryCompileExec797814242.dir/build.make CMakeFiles/cmTryCompileExec797814242.dir/build
make[1]: Entering directory `/var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp'
/usr/bin/cmake -E cmake_progress_report /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CMakeFiles 1
Building C object CMakeFiles/cmTryCompileExec797814242.dir/CheckIncludeFiles.c.o
/usr/lib/ccache/cc   -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include    -o CMakeFiles/cmTryCompileExec797814242.dir/CheckIncludeFiles.c.o   -c /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckIncludeFiles.c
In file included from /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckIncludeFiles.c:2:0:
/usr/include/glib-2.0/glib/gregex.h:26:2: error: #error "Only <glib.h> can be included directly."
 #error "Only <glib.h> can be included directly."
  ^
In file included from /usr/include/glib-2.0/glib/gregex.h:29:0,
                 from /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckIncludeFiles.c:2:
/usr/include/glib-2.0/glib/gerror.h:24:2: error: #error "Only <glib.h> can be included directly."
 #error "Only <glib.h> can be included directly."
  ^
In file included from /usr/include/glib-2.0/glib/gerror.h:29:0,
                 from /usr/include/glib-2.0/glib/gregex.h:29,
                 from /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckIncludeFiles.c:2:
/usr/include/glib-2.0/glib/gquark.h:29:2: error: #error "Only <glib.h> can be included directly."
 #error "Only <glib.h> can be included directly."
  ^
In file included from /usr/include/glib-2.0/glib/gquark.h:32:0,
                 from /usr/include/glib-2.0/glib/gerror.h:29,
                 from /usr/include/glib-2.0/glib/gregex.h:29,
                 from /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckIncludeFiles.c:2:
/usr/include/glib-2.0/glib/gtypes.h:29:2: error: #error "Only <glib.h> can be included directly."
 #error "Only <glib.h> can be included directly."
  ^
In file included from /usr/lib/glib-2.0/include/glibconfig.h:9:0,
                 from /usr/include/glib-2.0/glib/gtypes.h:32,
                 from /usr/include/glib-2.0/glib/gquark.h:32,
                 from /usr/include/glib-2.0/glib/gerror.h:29,
                 from /usr/include/glib-2.0/glib/gregex.h:29,
                 from /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckIncludeFiles.c:2:
/usr/include/glib-2.0/glib/gmacros.h:33:2: error: #error "Only <glib.h> can be included directly."
 #error "Only <glib.h> can be included directly."
  ^
In file included from /usr/include/glib-2.0/glib/gtypes.h:34:0,
                 from /usr/include/glib-2.0/glib/gquark.h:32,
                 from /usr/include/glib-2.0/glib/gerror.h:29,
                 from /usr/include/glib-2.0/glib/gregex.h:29,
                 from /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckIncludeFiles.c:2:
/usr/include/glib-2.0/glib/gversionmacros.h:29:2: error: #error "Only <glib.h> can be included directly."
 #error "Only <glib.h> can be included directly."
  ^
In file included from /usr/include/glib-2.0/glib/gregex.h:30:0,
                 from /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckIncludeFiles.c:2:
/usr/include/glib-2.0/glib/gstring.h:29:2: error: #error "Only <glib.h> can be included directly."
 #error "Only <glib.h> can be included directly."
  ^
In file included from /usr/include/glib-2.0/glib/gstring.h:33:0,
                 from /usr/include/glib-2.0/glib/gregex.h:30,
                 from /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckIncludeFiles.c:2:
/usr/include/glib-2.0/glib/gunicode.h:25:2: error: #error "Only <glib.h> can be included directly."
 #error "Only <glib.h> can be included directly."
  ^
In file included from /usr/include/glib-2.0/glib/gstring.h:34:0,
                 from /usr/include/glib-2.0/glib/gregex.h:30,
                 from /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckIncludeFiles.c:2:
/usr/include/glib-2.0/glib/gbytes.h:26:2: error: #error "Only <glib.h> can be included directly."
 #error "Only <glib.h> can be included directly."
  ^
In file included from /usr/include/glib-2.0/glib/gbytes.h:30:0,
                 from /usr/include/glib-2.0/glib/gstring.h:34,
                 from /usr/include/glib-2.0/glib/gregex.h:30,
                 from /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckIncludeFiles.c:2:
/usr/include/glib-2.0/glib/garray.h:29:2: error: #error "Only <glib.h> can be included directly."
 #error "Only <glib.h> can be included directly."
  ^
In file included from /usr/include/glib-2.0/glib/gstring.h:35:0,
                 from /usr/include/glib-2.0/glib/gregex.h:30,
                 from /var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp/CheckIncludeFiles.c:2:
/usr/include/glib-2.0/glib/gutils.h:29:2: error: #error "Only <glib.h> can be included directly."
 #error "Only <glib.h> can be included directly."
  ^
make[1]: *** [CMakeFiles/cmTryCompileExec797814242.dir/CheckIncludeFiles.c.o] Error 1
make[1]: Leaving directory `/var/uhubuild/work/compile/build/CMakeFiles/CMakeTmp'
make: *** [cmTryCompileExec797814242/fast] Error 2

Source:
/* */
#include <glib/gregex.h>


int main(){return 0;}