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@@ -8,6 +8,12 @@ AC_PREFIX_DEFAULT([/usr])
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AC_PROG_LIBTOOL
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AC_PROG_CC
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AC_PROG_CXX
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+AC_ARG_ENABLE([old-sdl], [ --enable-old-sdl Enabled compatibility for older version of SDL, missing some defines],
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+ AC_DEFINE([SDL_BUTTON_X1], 6, [Needed for old SDL versions])
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+ AC_DEFINE([SDL_BUTTON_X2], 7, [Needed for old SDL versions])
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+ AC_DEFINE([SDL_BUTTON_X1MASK], [SDL_BUTTON(SDL_BUTTON_X1)], [Needed for old SDL versions])
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+ AC_DEFINE([SDL_BUTTON_X2MASK], [SDL_BUTTON(SDL_BUTTON_X2)], [Needed for old SDL versions])
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+)
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AC_SEARCH_LIBS([sqrt], [m], [], AC_MSG_ERROR([Can't LÖVE without C math library]))
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AC_SEARCH_LIBS([SDL_Init], [SDL], [], AC_MSG_ERROR([Can't LÖVE without SDL]))
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AC_SEARCH_LIBS([glLoadIdentity], [GL], [], AC_MSG_ERROR([Can't LÖVE without OpenGL]))
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