From bb248546902109b0327b3b8e70d996d370316a08 Mon Sep 17 00:00:00 2001
From: "Michael R. Blair" <edu/mit/csail/zurich/ziggy>
Date: Fri, 2 Jun 2006 03:06:56 +0000
Subject: [PATCH] Suppress <mcrypt.h> & <mhash.h> includes when files are not
 present.

This avoids "makegen.scm" spewing syntactic crud (error/failure
messages) into "Makefile.deps" (and thus "Makefile.in" & "Makefile")
during the invocation of "./Setup.sh" by virtue of "prmcrypt" and
"prmhash" appearing in "makegen/files-optional.scm".

Note how "prmd5.c" is already nicely conditionalized on `HAVE_MD5_H'.
---
 v7/src/microcode/configure.ac | 11 ++++++++++-
 v7/src/microcode/prmcrypt.c   | 12 ++++++++++--
 v7/src/microcode/prmhash.c    | 12 ++++++++++--
 3 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/v7/src/microcode/configure.ac b/v7/src/microcode/configure.ac
index 9156dd83b..def84186e 100644
--- a/v7/src/microcode/configure.ac
+++ b/v7/src/microcode/configure.ac
@@ -1,7 +1,7 @@
 dnl Process this file with autoconf to produce a configure script.
 
 AC_INIT([MIT/GNU Scheme], [14.17], [bug-mit-scheme@gnu.org], [mit-scheme])
-AC_REVISION([$Id: configure.ac,v 1.9 2006/04/08 03:07:48 cph Exp $])
+AC_REVISION([$Id: configure.ac,v 1.10 2006/06/02 03:06:56 ihtfisp Exp $])
 AC_CONFIG_SRCDIR([boot.c])
 AC_CONFIG_HEADERS([config.h])
 AC_PROG_MAKE_SET
@@ -597,6 +597,15 @@ if test "${scheme_cv_lib_crypto}" = "yes"; then
     fi
 fi
 
+dnl These libraries might not be installed, so take care generating
+dnl file dependencies using "makegen/makegen.scm" when called on
+dnl "makegen/files-optional.scm".  To wit, "prmhash.c" & "prmcrypt.c"
+dnl must conditionalize their dependencies on <mhash.h> & <mcrypt.h>,
+dnl respectively, to avoid warnings in "Makefile.deps" and its embeds.
+dnl Finally, note that "prmd5.c" is similarly conditionalized as well.
+HAVE_LIBMHASH="no"
+HAVE_LIBMCRYPT="no"
+
 dnl The mhash library provides md5 support.  It can be loaded in addition
 dnl to other MD5 libraries and provides a rich set of hashes.
 if test "${scheme_cv_lib_mhash}" = "yes"; then
diff --git a/v7/src/microcode/prmcrypt.c b/v7/src/microcode/prmcrypt.c
index bf481272f..55bae0d1e 100644
--- a/v7/src/microcode/prmcrypt.c
+++ b/v7/src/microcode/prmcrypt.c
@@ -1,6 +1,6 @@
 /* -*-C-*-
 
-$Id: prmcrypt.c,v 1.5 2003/02/14 18:28:23 cph Exp $
+$Id: prmcrypt.c,v 1.6 2006/06/02 03:06:56 ihtfisp Exp $
 
 Copyright (c) 2001 Massachusetts Institute of Technology
 
@@ -29,7 +29,15 @@ USA.
 #include "prims.h"
 #include "usrdef.h"
 #include "os.h"
-#include <mcrypt.h>
+
+#ifdef HAVE_MCRYPT_H
+#  include <mcrypt.h>
+#else
+/*
+** Hack:  Dependency suppressed to appease "makegen/makegen.scm".
+**        This is OK since it cannot link w/o the library anyway.
+*/
+#endif
 
 static SCHEME_OBJECT
 cp2s (char * cp)
diff --git a/v7/src/microcode/prmhash.c b/v7/src/microcode/prmhash.c
index d86d396cc..9ac3046c2 100644
--- a/v7/src/microcode/prmhash.c
+++ b/v7/src/microcode/prmhash.c
@@ -1,6 +1,6 @@
 /* -*-C-*-
 
-$Id: prmhash.c,v 11.7 2006/03/11 04:13:10 cph Exp $
+$Id: prmhash.c,v 11.8 2006/06/02 03:06:56 ihtfisp Exp $
 
 Copyright (c) 2000-2001 Massachusetts Institute of Technology
 
@@ -29,7 +29,15 @@ USA.
 #include "prims.h"
 #include "usrdef.h"
 #include "os.h"
-#include <mhash.h>
+
+#ifdef HAVE_MHASH_H
+#  include <mhash.h>
+#else
+/*
+** Hack:  Dependency suppressed to appease "makegen/makegen.scm".
+**        This is OK since it cannot link w/o the library anyway.
+*/
+#endif
 
 #define UNARY_OPERATION(name, get_arg, cvt_val)				\
 {									\
-- 
2.25.1