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9b8fced079
Add a comment clarifying why USES+=xorg is used in a couple of Mk/Uses/* files, even though it does not provide any immediate functionality.
58 lines
1.6 KiB
Makefile
58 lines
1.6 KiB
Makefile
# $FreeBSD$
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#
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# Use OpenGL and related libraries and ports
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#
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# Feature: gl
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# Usage: USES=gl
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# USE_GL=egl gbm gl glesv2 glew glu glut
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#
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# USE_GL specifies which GL components to add as dependencies.
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# Not specifying USE_GL with USES=gl is an error.
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# USE_GL=yes implies USE_GL=glu. This is deprecated
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#
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# MAINTAINER: x11@FreeBSD.org
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.if !defined(_INCLUDE_USES_GL_MK)
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_INCLUDE_USES_GL_MK=yes
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_GL_egl_LIB_DEPENDS= libEGL.so:graphics/mesa-libs
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_GL_gbm_LIB_DEPENDS= libgbm.so:graphics/mesa-libs
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_GL_gl_LIB_DEPENDS= libGL.so:graphics/mesa-libs
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_GL_gl_USE_XORG= xorgproto
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_GL_glesv2_LIB_DEPENDS= libGLESv2.so:graphics/mesa-libs
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_GL_glew_LIB_DEPENDS= libGLEW.so:graphics/glew
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_GL_glu_LIB_DEPENDS= libGLU.so:graphics/libGLU
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_GL_glu_USE_XORG= xorgproto
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_GL_glut_LIB_DEPENDS= libglut.so:graphics/freeglut
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.if !empty(gl_ARGS)
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IGNORE= USES=gl takes no arguments
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.endif
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.if !defined(USE_GL)
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IGNORE= need to specify gl component with USE_GL
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.elif ${USE_GL:tl} == yes
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DEV_WARNING+= "USE_GL=yes is deprecated, please add USE_GL=glu (default) or specify component"
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USE_GL= glu
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.endif
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.for _component in ${USE_GL}
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.if !defined(_GL_${_component}_LIB_DEPENDS)
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IGNORE= uses unknown GL component
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.else
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USE_XORG+= ${_GL_${_component}_USE_XORG}
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LIB_DEPENDS+= ${_GL_${_component}_LIB_DEPENDS}
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.endif
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.endfor
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# We only need to include xorg.mk if we want USE_XORG modules
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# USES+=xorg does not provide any functionality, it just silences an error
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# message about USES=xorg not being set
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.if defined(USE_XORG) && !empty(USE_XORG)
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USES+= xorg
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.include "${USESDIR}/xorg.mk"
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.endif
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# _INCLUDE_USES_GL_MK
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.endif
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