--- /dev/null
+dnl Copyright (C) 2003 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
+dnl CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
+dnl
+dnl This library is free software; you can redistribute it and/or
+dnl modify it under the terms of the GNU Lesser General Public
+dnl License as published by the Free Software Foundation; either
+dnl version 2.1 of the License.
+dnl
+dnl This library is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+dnl Lesser General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU Lesser General Public
+dnl License along with this library; if not, write to the Free Software
+dnl Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+dnl
+dnl See http://www.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org
+dnl
+dnl
+dnl
+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,
+ [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_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${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"
+ 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${OpenGL_headers_ok}" = "xno" ; then
+ AC_CHECK_HEADER(GL/gl.h,
+ [OpenGL_headers_ok=yes],
+ [OpenGL_headers_ok=no])
+fi
+
+# under SunOS ?
+if test "x${OpenGL_headers_ok}" = "xno" ; then
+ AC_CHECK_HEADERS(/usr/openwin/share/include/GL/glxmd.h,
+ [OpenGL_headers_ok=yes; OGL_INCLUDES="-I/usr/openwin/share/include/"],
+ [OpenGL_headers_ok=no])
+fi
+
+# under IRIX ?
+if test "x${OpenGL_headers_ok}" = "xno" ; then
+ AC_CHECK_HEADERS(/opt/graphics/OpenGL/include/GL/glxmd.h,
+ [OpenGL_headers_ok=yes; OGL_INCLUDES="-I/opt/graphics/OpenGL/include"],
+ [OpenGL_headers_ok=no])
+fi
+
+# some linux OpenGL servers hide the includes in /usr/X11R6/include/GL
+if test "x${OpenGL_headers_ok}" = "xno" ; then
+ AC_CHECK_HEADERS(/usr/X11R6/include/GL/gl.h,
+ [OpenGL_headers_ok=yes; OGL_INCLUDES="-I/usr/X11R6/include"],
+ [OpenGL_headers_ok=no])
+fi
+
+if test "x${OpenGL_headers_ok}" = "xyes" ; then
+ AC_CHECKING(for OpenGL library)
+ 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 "${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} ${GL_LIB_PATH}"
+ AC_CHECK_LIB([GL],
+ [glBegin],
+ [OpenGL_libs_ok=yes],
+ [OpenGL_libs_ok=no])
+ if test "x${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_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
+
+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)
+
+AC_SUBST(OGL_INCLUDES)
+AC_SUBST(OGL_LIBS)
+
+AC_LANG_RESTORE
+
+])dnl
