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#!/usr/bin/make -f
# pnglibconf.mak - standard make lines for pnglibconf.h
#
# These lines are copied from Makefile.am, they illustrate
# how to automate the build of pnglibconf.h from scripts/pnglibconf.dfa
# given just 'awk', a C preprocessor and standard command line utilities
# Override as appropriate, these definitions can be overridden on
# the make command line (AWK='nawk' for example).
AWK = gawk
AWK = mawk
AWK = nawk
AWK = one-true-awk
AWK = awk # This fails on SunOS 5.10; use 'nawk'
CPP = $(CC) -E # If this fails on SunOS 5.10, use '/lib/cpp'
MOVE = mv -f
DELETE = rm -f
DFA_XTRA = # Put your configuration file here, see scripts/pnglibconf.dfa. Eg:
# DFA_XTRA = pngusr.dfa
# CPPFLAGS should contain the options to control the result,
# but DEFS and CFLAGS are also supported here, override
# as appropriate
DFNFLAGS = $(DEFS) $(CPPFLAGS) $(CFLAGS)
# srcdir is a de-facto standard for the location of the source
srcdir = .
# The standard pnglibconf.h exists as scripts/pnglibconf.h.prebuilt,
# copy this if the following doesn't work.
pnglibconf.h: pnglibconf.dfn
$(DELETE) $@ pnglibconf.c pnglibconf.out pnglibconf.tmp
echo '#include "pnglibconf.dfn"' >pnglibconf.c
@echo "## If '$(CC) -E' fails, try /lib/cpp (e.g. CPP='/lib/cpp')" >&2
$(CPP) $(DFNFLAGS) pnglibconf.c >pnglibconf.out
$(AWK) -f $(srcdir)/scripts/dfn.awk out=pnglibconf.tmp pnglibconf.out >&2
$(MOVE) pnglibconf.tmp $@
pnglibconf.dfn: $(srcdir)/scripts/pnglibconf.dfa $(srcdir)/scripts/options.awk $(srcdir)/pngconf.h $(srcdir)/pngusr.dfa $(DFA_XTRA)
$(DELETE) $@ pnglibconf.pre pnglibconf.tmp
@echo "## Calling $(AWK) from scripts/pnglibconf.mak" >&2
@echo "## If 'awk' fails, try a better awk (e.g. AWK='nawk')" >&2
$(AWK) -f $(srcdir)/scripts/options.awk out=pnglibconf.pre\
version=search $(srcdir)/pngconf.h $(srcdir)/scripts/pnglibconf.dfa\
$(srcdir)/pngusr.dfa $(DFA_XTRA) >&2
$(AWK) -f $(srcdir)/scripts/options.awk out=pnglibconf.tmp pnglibconf.pre >&2
$(MOVE) pnglibconf.tmp $@
clean-pnglibconf:
$(DELETE) pnglibconf.h pnglibconf.c pnglibconf.out pnglibconf.pre \
pnglibconf.dfn
clean: clean-pnglibconf
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