1 files changed, 55 insertions, 0 deletions
diff --git a/contrib/libpng/scripts/pnglibconf.mak b/contrib/libpng/scripts/pnglibconf.mak
new file mode 100755
index 0000000..bced8d3
--- /dev/null
+++ b/contrib/libpng/scripts/pnglibconf.mak
@@ -0,0 +1,55 @@
+#!/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 'awk' and 'sed'
+
+# 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  # Crashes on SunOS 5.10 - use 'nawk'
+SED = sed
+CPP = $(CC) -E
+COPY = cp
+DELETE = rm -f
+ECHO = echo
+DFA_XTRA = # Appended to scripts/options.awk
+
+# 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 defacto 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) $@ dfn.c dfn1.out dfn2.out dfn3.out
+	$(ECHO) '#include "pnglibconf.dfn"' >dfn.c
+	$(CPP) $(DFNFLAGS) dfn.c >dfn1.out
+	$(SED) -n -e 's|^.*PNG_DEFN_MAGIC-\(.*\)-PNG_DEFN_END.*$$|\1|p'\
+	    dfn1.out >dfn2.out
+	$(SED) -e 's| *@@@ *||g' -e 's| *$$||' dfn2.out >dfn3.out
+	$(COPY) dfn3.out $@
+	$(DELETE) dfn.c dfn1.out dfn2.out dfn3.out
+
+pnglibconf.dfn: $(srcdir)/scripts/pnglibconf.dfa $(srcdir)/scripts/options.awk
+	$(DELETE) $@ dfn1.out dfn2.out
+	$(ECHO) "Calling $(AWK) from scripts/pnglibconf.mak" >&2
+	$(ECHO) "If 'awk' crashes try a better awk (e.g. AWK='nawk')" >&2
+	$(AWK) -f $(srcdir)/scripts/options.awk out=dfn1.out\
+	    $(srcdir)/scripts/pnglibconf.dfa $(DFA_XTRA) 1>&2
+	$(AWK) -f $(srcdir)/scripts/options.awk out=dfn2.out dfn1.out 1>&2
+	$(COPY) dfn2.out $@
+	$(DELETE) dfn1.out dfn2.out
+
+clean-pnglibconf:
+	$(DELETE) pnglibconf.h pnglibconf.dfn dfn.c dfn1.out dfn2.out dfn3.out
+
+clean: clean-pnglibconf