AX_CHECK_GLU
, 

2004-11-15

Braden McDaniel <braden@endoframe.com>

AllPermissive
Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. Users of this software should generally follow the principles of the MIT License includings its disclaimer.

cryp.to ac-archive's Installed Packages (released)

Check for GLU. If GLU is found, the required preprocessor and linker flags are included in the output variables "GLU_CFLAGS" and "GLU_LIBS", respectively. This macro adds the configure option "--with-apple-opengl-framework", which users can use to indicate that Apple's OpenGL framework should be used on Mac OS X. If Apple's OpenGL framework is used, the symbol "HAVE_APPLE_OPENGL_FRAMEWORK" is defined. If no GLU implementation is found, "no_glu" is set to "yes".

AC_DEFUN([AX_CHECK_GLU],
[AC_REQUIRE([AX_CHECK_GL])dnl
AC_REQUIRE([AC_PROG_CXX])dnl
GLU_CFLAGS="${GL_CFLAGS}"
if test "X${with_apple_opengl_framework}" != "Xyes"; then
  AC_CACHE_CHECK([for OpenGL Utility library], [ax_cv_check_glu_libglu],
  [ax_cv_check_glu_libglu="no"
  ax_save_CPPFLAGS="${CPPFLAGS}"
  CPPFLAGS="${GL_CFLAGS} ${CPPFLAGS}"
  ax_save_LIBS="${LIBS}"
  LIBS=""
  ax_check_libs="-lglu32 -lGLU"
  for ax_lib in ${ax_check_libs}; do
    if test X$ax_compiler_ms = Xyes; then
      ax_try_lib=`echo $ax_lib | sed -e 's/^-l//' -e 's/$/.lib/'`
    else
      ax_try_lib="${ax_lib}"
    fi
    LIBS="${ax_try_lib} ${GL_LIBS} ${ax_save_LIBS}"
    #
    # libGLU typically links with libstdc++ on POSIX platforms. However,
    # setting the language to C++ means that test program source is named
    # "conftest.cc"; and Microsoft cl doesn't know what to do with such a
    # file.
    #
    AC_LANG_PUSH([C++])
    if test X$ax_compiler_ms = Xyes; then
      AC_LANG_PUSH([C])
    fi
    AC_LINK_IFELSE(
    [AC_LANG_PROGRAM([[
# if HAVE_WINDOWS_H && defined(_WIN32)
#   include <windows.h>
# endif
# include <GL/glu.h>]],
                     [[gluBeginCurve(0)]])],
    [ax_cv_check_glu_libglu="${ax_try_lib}"; break])
    if test X$ax_compiler_ms = Xyes; then
      AC_LANG_POP([C])
    fi
    AC_LANG_POP([C++])
  done
  LIBS=${ax_save_LIBS}
  CPPFLAGS=${ax_save_CPPFLAGS}])
  if test "X${ax_cv_check_glu_libglu}" = "Xno"; then
    no_glu="yes"
    GLU_CFLAGS=""
    GLU_LIBS=""
  else
    GLU_LIBS="${ax_cv_check_glu_libglu} ${GL_LIBS}"
  fi
fi
AC_SUBST([GLU_CFLAGS])
AC_SUBST([GLU_LIBS])
])