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dnl
dnl Check for OpenGL & [Glut | GLU]
dnl
dnl AM_PATH_OPENGL([ACTION IF FOUND [, ACTION IF NOT FOUND]])
dnl
AC_DEFUN([AM_PATH_OPENGL], [
AC_ARG_ENABLE(opengl, AC_HELP_STRING([--disable-opengl], [do not build OpenGL plugin]),
[enableopengl=$enableval],
[enableopengl="yes"]
)
if test x$enableopengl = "xyes"; then
AC_CHECK_LIB(GL, glBegin,
[AC_CHECK_HEADER(GL/gl.h,
[ac_have_opengl="yes"
OPENGL_LIBS="-lGL"
dnl check for glut
AC_CHECK_LIB(glut, glutInit,
[ac_have_glut="yes"
GLUT_LIBS="-lglut"
AC_DEFINE(HAVE_GLUT,1,[Define this if you have GLut support available])
AC_DEFINE(HAVE_OPENGL,1,[Define this if you have OpenGL support available])
],
[ac_have_glut="no"
dnl fallback, check for GLU
AC_CHECK_LIB(GLU, gluPerspective,
[ac_have_glu="yes"
GLU_LIBS="-lGLU -lm"
AC_DEFINE(HAVE_GLU,1,[Define this if you have GLU support available])
AC_DEFINE(HAVE_OPENGL,1,[Define this if you have OpenGL support available])
],
[ac_have_glu="no"],
[$X_LIBS $X_PRE_LIBS $OPENGL_LIBS -lGLU -lm $X_EXTRA_LIBS]
)
],
[$X_LIBS $X_PRE_LIBS -lglut $X_EXTRA_LIBS]
)
]
)],
[],
[$X_LIBS $X_PRE_LIBS -lGL $X_EXTRA_LIBS]
)
if test x$ac_have_opengl = "xyes" -a x$ac_have_glut = "xyes" -o x$ac_have_opengl = "xyes" -a x$ac_have_glu = "xyes"; then
ac_use_opengl=yes
fi
fi
AC_SUBST(OPENGL_CFLAGS)
AC_SUBST(OPENGL_LIBS)
AC_SUBST(GLUT_LIBS)
AC_SUBST(GLU_LIBS)
AM_CONDITIONAL(HAVE_OPENGL, [test x$ac_use_opengl = "xyes"])
dnl result
if test x$ac_use_opengl = "xyes"; then
ifelse([$1], , :, [$1])
else
ifelse([$2], , :, [$2])
fi
])
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