PATCH: ansi2knr configure check and removal from CVS

[Geoff Wing <gcw@zsh.org>]

Heyla,
this implements a basic check for ansi2knr as proposed ages ago.
It will cause configure to exit "rudely" if ansi2knr is requested
via configure option but not available.  Much of the ansi2knr
build framework has been deliberately left in place.  The corresponding
action for the patch is the removal of Src/ansi2knr.c from CVS

Regards,
Geoff

Index: zshconfig.ac
===================================================================
RCS file: /cvsroot/zsh/zsh/zshconfig.ac,v
retrieving revision 1.21
diff -u -r1.21 zshconfig.ac
--- zshconfig.ac	2001/11/15 12:10:22	1.21
+++ zshconfig.ac	2001/12/14 00:32:19
@@ -289,7 +289,7 @@
 dnl if the user hasn't specified CFLAGS, then
 dnl   if compiler is gcc, then use -O2 and some warning flags
 dnl   else use -O
-if test -n "$auto_cflags"; then
+if test -n "$auto_cflags" && test ."$ansi2knr" != .yes; then
   if test "${enable_zsh_debug}" = yes; then
     if test -n "$GCC"; then
       CFLAGS="$CFLAGS -Wall -Wno-implicit -Wmissing-prototypes -ggdb"
@@ -462,6 +462,17 @@
 AC_PROG_AWK                 dnl Check for mawk,gawk,nawk, then awk.
 AC_PROG_LN                  dnl Check for working ln, for "make install"
 AC_CHECK_PROGS([YODL], [yodl], [: yodl])
+AC_CHECK_PROGS([ANSI2KNR], [ansi2knr], [: ansi2knr])
+
+if test x"$ansi2knr" = xyes && test x"$ANSI2KNR" = x": ansi2knr"; then
+    echo "----------"
+    echo "configure fatal error:"
+    echo "ansi2knr was specified (--enable-ansi2knr) but the program could not be found."
+    echo "Either remove the configure option if it is not required or build the ansi2knr"
+    echo "program before reconfiguring Zsh.  The source code for ansi2knr is also"
+    echo "available in the GPL directory on Zsh distribution sites."
+    exit 1
+fi
 
 dnl ------------------
 dnl CHECK HEADER FILES
Index: Config/defs.mk.in
===================================================================
RCS file: /cvsroot/zsh/zsh/Config/defs.mk.in,v
retrieving revision 1.7
diff -u -r1.7 defs.mk.in
--- Config/defs.mk.in	2001/04/23 19:59:04	1.7
+++ Config/defs.mk.in	2001/12/14 00:32:19
@@ -65,6 +65,7 @@
 
 # utilities
 AWK             = @AWK@
+ANSI2KNR        = @ANSI2KNR@
 YODL            = @YODL@
 YODL2TXT        = $(YODL)2txt
 YODL2HTML       = $(YODL)2html
@@ -86,7 +87,8 @@
 DLCFLAGS='$(DLCFLAGS)' DLLDFLAGS='$(DLLDFLAGS)' \
 LIBLDFLAGS='$(LIBLDFLAGS)' EXELDFLAGS='$(EXELDFLAGS)' \
 LIBS='$(LIBS)' DL_EXT='$(DL_EXT)' DLLD='$(DLLD)' \
-AWK='$(AWK)' YODL='$(YODL)' YODL2TXT='$(YODL2TXT)' YODL2HTML='$(YODL2HTML)' \
+AWK='$(AWK)' ANSI2KNR='$(ANSI2KNR)' \
+YODL='$(YODL)' YODL2TXT='$(YODL2TXT)' YODL2HTML='$(YODL2HTML)' \
 FUNCTIONS_INSTALL='$(FUNCTIONS_INSTALL)' tzsh='$(tzsh)'
 
 # override built-in suffix list
Index: Src/Makefile.in
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/Makefile.in,v
retrieving revision 1.11
diff -u -r1.11 Makefile.in
--- Src/Makefile.in	2001/05/20 10:59:28	1.11
+++ Src/Makefile.in	2001/12/14 00:32:19
@@ -135,20 +135,6 @@
 $(ENTRYOBJ): FORCE
 	@$(MAKE) -f Makemod $(MAKEDEFS) $@
 
-# ========== ANSI TO K&R CONVERSION ==========
-
-ANSI_KNR = ansi2knr
-ANSIKNR  =
-
-Makemod: $(ANSI@U@KNR)
-
-ansi2knr.o: ansi2knr.c
-	$(CC) -c $(CPPFLAGS) $(CFLAGS) $(sdir)/ansi2knr.c
-
-ansi2knr: ansi2knr.o
-	rm -f $@
-	$(CC) $(LDFLAGS) $(EXELDFLAGS) -o $@ ansi2knr.o
-
 # ========== DEPENDENCIES FOR INSTALLING ==========
 
 install: install.bin install.modules
@@ -203,7 +189,7 @@
 .PHONY: mostlyclean-here
 
 clean-here:
-	rm -f modules.stamp zsh$(EXEEXT) ansi2knr.o ansi2knr
+	rm -f modules.stamp zsh$(EXEEXT)
 	rm -f libzsh-*.$(DL_EXT)
 .PHONY: clean-here
 
Index: Src/Makemod.in.in
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/Makemod.in.in,v
retrieving revision 1.4
diff -u -r1.4 Makemod.in.in
--- Src/Makemod.in.in	2000/11/26 20:01:03	1.4
+++ Src/Makemod.in.in	2001/12/14 00:32:19
@@ -65,7 +65,7 @@
 	@rm -f $(dir_src)/stamp-modobjs
 
 .c$(KNR@U@OBJ):
-	$(dir_src)/ansi2knr $< > $@.c
+	@ANSI2KNR@ $< > $@.c
 	$(COMPILE) -o $@ $@.c
 	rm -f $@.c
 	@rm -f $(dir_src)/stamp-modobjs
@@ -74,7 +74,7 @@
 	$(DLCOMPILE) -o $@ $<
 
 .c.$(KNR@U@OBJ):
-	$(dir_src)/ansi2knr $< > $@.c
+	@ANSI2KNR@ $< > $@.c
 	$(DLCOMPILE) -o $@ $@.c
 	rm -f $@.c