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479f84ca4d
instead of passing the possibly null argument to awk(1) and getting an obscure error from it.
48 lines
1.1 KiB
Makefile
48 lines
1.1 KiB
Makefile
# $FreeBSD$
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.if !target(__<bsd.symver.mk>__)
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__<bsd.symver.mk>__:
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.include <bsd.init.mk>
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# Generate the version map given the version definitions
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# and symbol maps.
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.if ${MK_SYMVER} == "yes" && !empty(VERSION_DEF) && !empty(SYMBOL_MAPS)
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# Find the awk script that generates the version map.
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VERSION_GEN?= version_gen.awk
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VERSION_MAP?= Version.map
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CLEANFILES+= ${VERSION_MAP}
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# Compute the make's -m path.
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_mpath=
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_oarg=
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.for _arg in ${.MAKEFLAGS}
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.if ${_oarg} == "-m"
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_mpath+= ${_arg}
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.endif
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_oarg= ${_arg}
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.endfor
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_mpath+= /usr/share/mk
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# Look up ${VERSION_GEN} in ${_mpath}.
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_vgen=
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.for path in ${_mpath}
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.if empty(_vgen)
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.if exists(${path}/${VERSION_GEN})
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_vgen= ${path}/${VERSION_GEN}
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.endif
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.endif
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.endfor
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.if empty(_vgen)
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.error ${VERSION_GEN} not found in the search path.
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.endif
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# Run the symbol maps through the C preprocessor before passing
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# them to the symbol version generator.
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${VERSION_MAP}: ${VERSION_DEF} ${_vgen} ${SYMBOL_MAPS}
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cat ${SYMBOL_MAPS} | ${CPP} - - \
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| awk -v vfile=${VERSION_DEF} -f ${_vgen} > ${.TARGET}
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.endif # !empty(VERSION_DEF) && !empty(SYMBOL_MAPS)
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.endif # !target(__<bsd.symver.mk>__)
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