59 lines
2.1 KiB
Makefile
59 lines
2.1 KiB
Makefile
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#!/usr/bin/make -f
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# pnglibconf.mak - standard make lines for pnglibconf.h
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#
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# These lines are copied from Makefile.am, they illustrate
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# how to automate the build of pnglibconf.h from scripts/pnglibconf.dfa
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# given 'awk' and 'sed'
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# Override as appropriate, these definitions can be overridden on
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# the make command line (AWK='nawk' for example).
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AWK = gawk
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AWK = mawk
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AWK = nawk
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AWK = one-true-awk
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AWK = awk # Crashes on SunOS 5.10 - use 'nawk'
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CPP = $(CC) -E # Does not work on SUN OS 5.10 - use /lib/cpp
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SED = sed
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COPY = cp
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DELETE = rm -f
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ECHO = echo
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DFA_XTRA = # Appended to scripts/options.awk
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# CPPFLAGS should contain the options to control the result,
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# but DEFS and CFLAGS are also supported here, override
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# as appropriate
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DFNFLAGS = $(DEFS) $(CPPFLAGS) $(CFLAGS)
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# srcdir is a defacto standard for the location of the source
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srcdir = .
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# The standard pnglibconf.h exists as scripts/pnglibconf.h.prebuilt,
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# copy this if the following doesn't work.
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pnglibconf.h: pnglibconf.dfn
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$(DELETE) $@ dfn.c dfn1.out dfn2.out dfn3.out
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$(ECHO) '#include "pnglibconf.dfn"' >dfn.c
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$(CPP) $(DFNFLAGS) dfn.c >dfn1.out
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$(ECHO) "If 'cpp -e' crashes try /lib/cpp (e.g. CPP='/lib/cpp')" >&2
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$(SED) -n -e 's|^.*PNG_DEFN_MAGIC *-\(.*\)- *PNG_DEFN_END.*$$|\1|p'\
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dfn1.out >dfn2.out
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$(SED) -e 's| *PNG_JOIN *||g' -e 's| *$$||' dfn2.out >dfn3.out
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$(COPY) dfn3.out $@
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$(DELETE) dfn.c dfn1.out dfn2.out dfn3.out
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pnglibconf.dfn: $(srcdir)/scripts/pnglibconf.dfa $(srcdir)/scripts/options.awk $(srcdir)/pngconf.h
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$(DELETE) $@ dfn1.out dfn2.out
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$(ECHO) "Calling $(AWK) from scripts/pnglibconf.mak" >&2
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$(ECHO) "If 'awk' crashes try a better awk (e.g. AWK='nawk')" >&2
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$(AWK) -f $(srcdir)/scripts/options.awk out=dfn1.out version=search\
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$(srcdir)/pngconf.h $(srcdir)/scripts/pnglibconf.dfa\
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$(DFA_XTRA) 1>&2
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$(AWK) -f $(srcdir)/scripts/options.awk out=dfn2.out dfn1.out 1>&2
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$(COPY) dfn2.out $@
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$(DELETE) dfn1.out dfn2.out
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clean-pnglibconf:
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$(DELETE) pnglibconf.h pnglibconf.dfn dfn.c dfn1.out dfn2.out dfn3.out
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clean: clean-pnglibconf
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