90 lines
2.1 KiB
Plaintext
90 lines
2.1 KiB
Plaintext
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dnl
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dnl Cg support
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dnl
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AC_DEFUN([AM_PATH_CG],
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[dnl
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dnl Get the cflags
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dnl
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AC_ARG_WITH(cg-prefix,[ --with-cg-prefix=PFX Prefix where Cg is installed (optional)],
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cg_prefix="$withval", cg_prefix="")
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if test x$cg_prefix != x ; then
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CG_CXXFLAGS="-I$cg_prefix/include"
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CG_LDFLAGS="-L$cg_prefix/lib -lGL -lCg -lCgGL -lGLU -lpthread -lglut"
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else
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case $host_os in
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darwin*)
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CG_CXXFLAGS=""
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CG_LDFLAGS="-framework Cg -framework AGL -framework OpenGL -framework GLUT"
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;;
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*)
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CG_CXXFLAGS=""
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CG_LDFLAGS="-lGL -lCg -lCgGL -lGLU -lpthread -lglut"
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;;
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esac
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fi
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AC_MSG_CHECKING(for Cg)
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no_cg=""
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ac_save_CXXFLAGS="$CXXFLAGS"
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ac_save_LDFLAGS="$LDFLAGS"
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CXXFLAGS="$CXXFLAGS $CG_CXXFLAGS"
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LDFLAGS="$CG_LDFLAGS"
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case $host_os in
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darwin*)
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AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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AC_TRY_LINK([
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#include <OpenGL/gl.h>
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#include <Cg/cg.h>
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#include <Cg/cgGL.h>],
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[
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cgCreateContext ();
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],, no_cg=yes)
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;;
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*)
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AC_LANG_SAVE
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AC_LANG_CPLUSPLUS
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AC_TRY_LINK([
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#include <GL/gl.h>
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#include <Cg/cg.h>
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#include <Cg/cgGL.h>],
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[
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cgCreateContext ();
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],, no_cg=yes)
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;;
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esac
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AC_LANG_RESTORE
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CXXFLAGS="$ac_save_CXXFLAGS"
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LDFLAGS="$ac_save_LDFLAGS"
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if test "x$no_cg" = "x" ; then
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AC_MSG_RESULT(yes)
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ifelse([$1], , :, [$1])
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else
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AC_MSG_RESULT(no)
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echo "*** The Cg test program could not be compiled."
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echo "*** Possible reasons:"
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echo "*** - The Cg libraries and includes are not installed."
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echo "*** - configure cannot find Cg (use the"
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echo "*** --with-cg-prefix option to tell configure where"
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echo "*** to find it)."
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echo "*** - Your version of Cg is out of date. Please update it"
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echo "*** to the latest version."
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echo "***"
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echo "*** The exrdisplay program will not be built with fragment shader"
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echo "*** support because the fragment shader support depends on Cg."
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CG_CXXFLAGS=""
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CG_LDFLAGS=""
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ifelse([$2], , :, [$2])
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fi
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AC_SUBST(CG_CXXFLAGS)
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AC_SUBST(CG_LDFLAGS)
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])
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