AC_DEFUN([CHECK_OPENGL],[
AC_REQUIRE([AC_PROG_CC])dnl
AC_REQUIRE([AC_PROG_CPP])dnl
+AC_REQUIRE([AC_LINKER_OPTIONS])dnl
+
+AC_LANG_SAVE
+AC_LANG_CPLUSPLUS
+
AC_ARG_WITH(opengl,
- [ --with-opengl=DIR root directory path of OpenGL installation ],
- [
- opengl_dir="$withval"
- local_opengl=yes
- ], [
- dirs="/usr/lib /usr/local/lib /opt/graphics/OpenGL/lib /usr/openwin/lib /usr/X11R6/lib"
- ])dnl
+ [AC_HELP_STRING([--with-opengl=DIR],[root directory path of OpenGL installation])],
+ [opengl_dir="$withval"],
+ [dirs="/usr/lib${LIB_LOCATION_SUFFIX} /usr/local/lib${LIB_LOCATION_SUFFIX} /opt/graphics/OpenGL/lib${LIB_LOCATION_SUFFIX} /usr/openwin/lib${LIB_LOCATION_SUFFIX} /usr/X11R6/lib${LIB_LOCATION_SUFFIX}"])dnl
AC_CHECKING(for OpenGL)
-
-AC_SUBST(OGL_INCLUDES)
-AC_SUBST(OGL_LIBS)
+AC_CHECKING(for OpenGL headers)
OGL_INCLUDES=""
OGL_LIBS=""
+GL_LIB_PATH=""
+GLU_LIB_PATH=""
+
OpenGL_ok=no
+OpenGL_libs_ok=no
+OpenGL_headers_ok=no
dnl openGL headers
-
# by default
-
-if test "x$local_opengl" = "xyes" ; then
- if test -f "${opengl_dir}/include/GL/gl.h" ; then
- OpenGL_ok=yes
- OGL_INCLUDES="-I${opengl_dir}/include"
+if test "x${opengl_dir}" != "x" ; then
+ AC_MSG_RESULT(for opengl_dir: $opengl_dir)
+ AC_CHECK_HEADER([${opengl_dir}/include/GL/gl.h],
+ [OpenGL_headers_ok=yes; OGL_INCLUDES="-I${opengl_dir}/include"],
+ [OpenGL_headers_ok=no])
+ if test "x${OpenGL_headers_ok}" = "xyes" ; then
+ AC_CHECKING(for default OpenGL library)
+ if test "x${opengl_dir}" = "x/usr" ; then
+ OGL_LIBS=""
+ else
OGL_LIBS="-L${opengl_dir}/lib"
- AC_MSG_RESULT(select OpenGL distribution in ${opengl_dir})
- else
- AC_MSG_RESULT(no gl.h header file in ${opengl_dir}/include/GL)
- fi
+ fi
+ LDFLAGS_old="$LDFLAGS"
+ LDFLAGS="$LDFLAGS $OGL_LIBS"
+ AC_CHECK_LIB([GL],
+ [glBegin],
+ [OpenGL_libs_ok=yes],
+ [OpenGL_libs_ok=no])
+ if test "x${OpenGL_libs_ok}" = "xyes" ; then
+ AC_TRY_LINK([],
+ [],
+ [OpenGL_libs_ok=yes ; OpenGL_ok=yes; OGL_LIBS="$OGL_LIBS -lGL"],
+ [OpenGL_libs_ok=no])
+ fi
+ LDFLAGS="$LDFLAGS_old"
+ fi
fi
-if test "x$OpenGL_ok" = "xno"
-then
- AC_CHECK_HEADERS(GL/gl.h, [OpenGL_ok=yes])
+if test "x${OpenGL_headers_ok}" = "xno" ; then
+ AC_CHECK_HEADER(GL/gl.h,
+ [OpenGL_headers_ok=yes],
+ [OpenGL_headers_ok=no])
fi
-if test "x$OpenGL_ok" = "xno"
-then
# under SunOS ?
+if test "x${OpenGL_headers_ok}" = "xno" ; then
AC_CHECK_HEADERS(/usr/openwin/share/include/GL/glxmd.h,
- [OpenGL_ok=yes]
- OGL_INCLUDES="-I/usr/openwin/share/include/")
+ [OpenGL_headers_ok=yes; OGL_INCLUDES="-I/usr/openwin/share/include/"],
+ [OpenGL_headers_ok=no])
fi
-if test "x$OpenGL_ok" = "xno"
-then
# under IRIX ?
+if test "x${OpenGL_headers_ok}" = "xno" ; then
AC_CHECK_HEADERS(/opt/graphics/OpenGL/include/GL/glxmd.h,
- [OpenGL_ok=yes]
- OGL_INCLUDES="-I/opt/graphics/OpenGL/include")
+ [OpenGL_headers_ok=yes; OGL_INCLUDES="-I/opt/graphics/OpenGL/include"],
+ [OpenGL_headers_ok=no])
fi
-if test "x$OpenGL_ok" = "xno"
-then
+
# some linux OpenGL servers hide the includes in /usr/X11R6/include/GL
+if test "x${OpenGL_headers_ok}" = "xno" ; then
AC_CHECK_HEADERS(/usr/X11R6/include/GL/gl.h,
- [OpenGL_ok=yes]
- OGL_INCLUDES="-I/usr/X11R6/include")
+ [OpenGL_headers_ok=yes; OGL_INCLUDES="-I/usr/X11R6/include"],
+ [OpenGL_headers_ok=no])
fi
-if test "x$OpenGL_ok" = "xyes"
-then
+if test "x${OpenGL_headers_ok}" = "xyes" ; then
AC_CHECKING(for OpenGL library)
- OpenGL_ok=no
- for i in $dirs; do
- if test -r "$i/libGL.so"; then
-dnl AC_MSG_RESULT(in $i)
- OGL_LIBS="-L$i"
+ for idir in $dirs; do
+ if test -r "${idir}/libGL.so"; then
+ AC_MSG_RESULT(in ${idir})
+ if test "x${idir}" = "x/usr/lib${LIB_LOCATION_SUFFIX}" ; then
+ GL_LIB_PATH=""
+ else
+ GL_LIB_PATH="-L${idir}"
+ fi
break
fi
-# under IRIX ?
- if test -r "$i/libGL.sl"; then
-dnl AC_MSG_RESULT(in $i)
- OGL_LIBS="-L$i"
+ # under IRIX ?
+ if test -r "${idir}/libGL.sl"; then
+ AC_MSG_RESULT(in ${idir})
+ if test "x${idir}" = "x/usr/lib${LIB_LOCATION_SUFFIX}" ; then
+ GL_LIB_PATH=""
+ else
+ GL_LIB_PATH="-L${idir}"
+ fi
break
fi
done
- LDFLAGS_old="$LDFLAGS"
- LDFLAGS="$LDFLAGS $OGL_LIBS"
- AC_CHECK_LIB(GL,glBegin,OpenGL_ok=yes,OpenGL_ok=no)
+ LDFLAGS_old="${LDFLAGS}"
+ LDFLAGS="${LDFLAGS} ${GL_LIB_PATH}"
+ AC_CHECK_LIB([GL],
+ [glBegin],
+ [OpenGL_libs_ok=yes],
+ [OpenGL_libs_ok=no])
+ if test "x${OpenGL_libs_ok}" = "xyes" ; then
+ AC_TRY_LINK([],
+ [],
+ [OpenGL_libs_ok=yes ; OGL_LIBS="${OGL_LIBS} ${GL_LIB_PATH} -lGL"],
+ [OpenGL_libs_ok=no])
+ fi
LDFLAGS="$LDFLAGS_old"
fi
-if test "x$OpenGL_ok" = "xyes" ; then
- OGL_LIBS="$OGL_LIBS -lGL"
+if test "x${OpenGL_libs_ok}" = "xyes" ; then
+ for idir in $dirs; do
+ if test -r "${idir}/libGLU.so"; then
+ AC_MSG_RESULT(in ${idir})
+ if test "x${idir}" = "x/usr/lib${LIB_LOCATION_SUFFIX}" ; then
+ GLU_LIB_PATH=""
+ else
+ GLU_LIB_PATH="-L${idir}"
+ fi
+ break
+ fi
+ # under IRIX ?
+ if test -r "${idir}/libGLU.sl"; then
+ AC_MSG_RESULT(in ${idir})
+ if test "x${idir}" = "x/usr/lib${LIB_LOCATION_SUFFIX}" ; then
+ GLU_LIB_PATH=""
+ else
+ GLU_LIB_PATH="-L${idir}"
+ fi
+ break
+ fi
+ done
+ LDFLAGS_old="${LDFLAGS}"
+ LDFLAGS="${LDFLAGS} ${OGL_LIBS} ${GLU_LIB_PATH}"
+ AC_CHECK_LIB([GLU],
+ [gluBeginSurface],
+ [OpenGL_libs_ok=yes],
+ [OpenGL_libs_ok=no])
+ if test "x${OpenGL_libs_ok}" = "xyes" ; then
+ AC_TRY_LINK([],
+ [],
+ [OpenGL_libs_ok=yes ; OGL_LIBS="${OGL_LIBS} ${GLU_LIB_PATH} -lGLU"],
+ [OpenGL_libs_ok=no])
+ fi
+ LDFLAGS="$LDFLAGS_old"
fi
+if test "x${OpenGL_headers_ok}" = "xyes" ; then
+ if test "x${OpenGL_libs_ok}" = "xyes" ; then
+ OpenGL_ok=yes
+ fi
+fi
-OpenGLU_ok=no
-LDFLAGS_old="$LDFLAGS"
-LDFLAGS="$LDFLAGS $OGL_LIBS"
-AC_CHECK_LIB(GLU,gluBeginSurface,OpenGLU_ok=yes,OpenGLU_ok=no)
-LDFLAGS="$LDFLAGS_old"
+AC_MSG_RESULT(for OpenGL_headers_ok: $OpenGL_headers_ok)
+AC_MSG_RESULT(for OpenGL_libs_ok: $OpenGL_libs_ok)
+AC_MSG_RESULT(for OpenGL_ok: $OpenGL_ok)
-if test "x$OpenGLU_ok" = "xyes" ; then
- OGL_LIBS="$OGL_LIBS -lGLU"
-fi
+AC_SUBST(OGL_INCLUDES)
+AC_SUBST(OGL_LIBS)
-# Save cache
-AC_CACHE_SAVE
+AC_LANG_RESTORE
])dnl
