39 lines
826 B
Plaintext
39 lines
826 B
Plaintext
AC_DEFUN([SM_OPENGL_TRY_LIB],
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[
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dnl # On Windows OpenGL functions' library symbols don't match their function names. So we have to do it the hard way.
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AC_MSG_CHECKING(for glBegin in $1)
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AC_LANG_PUSH(C)
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LIBS_SAVE=$LIBS
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LIBS="$LIBS $1"
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AC_LINK_IFELSE(
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[AC_LANG_PROGRAM([#include <GL/gl.h>], [glBegin(GL_POINTS)])],
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[AC_MSG_RESULT(yes)
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$2],
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AC_MSG_RESULT(no)
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)
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LIBS=$LIBS_SAVE
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AC_LANG_POP(C)
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])
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AC_DEFUN([SM_OPENGL],
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[
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AC_LANG_PUSH(C)
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AC_CHECK_HEADER("GL/gl.h", ,
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AC_MSG_ERROR("OpenGL headers not found."), [$GL_INCLUDES])
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GL_LIBS=""
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SM_OPENGL_TRY_LIB(-lGL, [GL_LIBS="-lGL"])
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if test x$GL_LIBS = "x"; then
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SM_OPENGL_TRY_LIB(-lopengl32, [GL_LIBS="-lopengl32"])
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fi
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if test x$GL_LIBS = "x"; then
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AC_MSG_ERROR("No usable OpenGL library found.")
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fi
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]) |