[1300] in Kerberos_V5_Development
Autoconf (2.10) feature addition to AC_OUTPUT
daemon@ATHENA.MIT.EDU (Tom Yu)
Wed Jun 12 19:44:25 1996
Date: Wed, 12 Jun 1996 19:43:12 -0400
To: djm@gnu.ai.mit.edu
Cc: bug-gnu-utils@gnu.ai.mit.edu
Cc: krbdev@MIT.EDU, marc@MIT.EDU, raeburn@cygnus.com
From: Tom Yu <tlyu@MIT.EDU>
I have implemented a feature addition to AC_OUTPUT. This allows an
output file to be constructed from more than one input file. In the
Kerberos 5 project, it is useful to prepend and append pieces (each of
which needs substitution) to the individual Makefile.in files that are
common to all directories.
Allowing a general mechanism for having configure create a file from
multiple sources that are concatenated before substitution seemed like
a good idea. Basically in addition to having outfile[:infile] it is
now possible to have outfile[:infile1[+infile2[+infile3...]]] in the
call to AC_OUTPUT in a configure.in file.
Please consider these changes for a future release of Autoconf. We
find this change to be useful in the Kerberos 5 project and believe
that others will find them to be useful as well. The diffs are
included below.
Thank you
---Tom
Index: ChangeLog
===================================================================
RCS file: /afs/athena.mit.edu/astaff/project/krbdev/.cvsroot/src/util/autoconf/ChangeLog,v
retrieving revision 1.12
diff -u -r1.12 ChangeLog
--- ChangeLog 1996/05/20 22:07:19 1.12
+++ ChangeLog 1996/06/12 22:17:40
@@ -1,3 +1,14 @@
+Wed Jun 12 18:17:17 1996 Tom Yu <tlyu@voltage-multiplier.mit.edu>
+
+ * autoconf.texi (Output): document changes to AC_OUTPUT
+
+Tue Jun 11 23:41:10 1996 Tom Yu <tlyu@mit.edu>
+
+ * acgeneral.m4 (AC_OUTPUT_FILES): allow for multiple files in
+ AC_OUTPUT; this is done via
+ AC_OUTPUT(outfile[:infile1[+infile2[+infile3...]]]). The
+ source files are concatenated and substituted over.
+
Tue May 7 13:20:33 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>
* acgeneral.m4: Verion 2.10 released.
Index: acgeneral.m4
===================================================================
RCS file: /afs/athena.mit.edu/astaff/project/krbdev/.cvsroot/src/util/autoconf/acgeneral.m4,v
retrieving revision 1.12
diff -u -r1.12 acgeneral.m4
--- acgeneral.m4 1996/05/20 22:07:32 1.12
+++ acgeneral.m4 1996/06/12 21:46:35
@@ -1987,7 +1987,19 @@
])dnl
echo creating "$ac_file"
rm -f "$ac_file"
- configure_input="Generated automatically from `echo $ac_file_in|sed 's%.*/%%'` by configure."
+ # allow for outfile[:infile1[+infile2[+infile3...]]] syntax
+ IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}+"
+ ac_files_in=
+ for ac_file_name in $ac_file_in
+ do
+ ac_files_in="$ac_files_in $ac_given_srcdir/$ac_file_name"
+ done
+ IFS="$ac_save_ifs"
+ configure_input=`echo $ac_files_in | sed 's%/./%/%g
+s% *./%%g
+s% *%+%g
+s%^%Generated automatically from %
+s%$% by configure.%'`
case "$ac_file" in
*Makefile*) ac_comsub="1i\\
# $configure_input" ;;
@@ -1999,7 +2011,7 @@
s%@top_srcdir@%$top_srcdir%g
ifdef([AC_PROVIDE_AC_PROG_INSTALL], [s%@INSTALL@%$INSTALL%g
])dnl
-" -f conftest.subs $ac_given_srcdir/$ac_file_in > $ac_file
+" -f conftest.subs $ac_files_in > $ac_file
dnl This would break Makefile dependencies.
dnl if cmp -s $ac_file conftest.out 2>/dev/null; then
dnl echo "$ac_file is unchanged"
Index: autoconf.texi
===================================================================
RCS file: /afs/athena.mit.edu/astaff/project/krbdev/.cvsroot/src/util/autoconf/autoconf.texi,v
retrieving revision 1.6
diff -u -r1.6 autoconf.texi
--- autoconf.texi 1996/05/20 22:07:59 1.6
+++ autoconf.texi 1996/06/12 21:34:39
@@ -817,6 +817,12 @@
AC_OUTPUT(Makefile:templates/top.mk lib/Makefile:templates/lib.mk)
@end example
+You can also generate an output file from multiple input files by
+separating the input files by a plus sign. For example,
+@example
+AC_OUTPUT(Makefile:templates/pre.in+Makefile.in+templates/post.in)
+@end example
+
If you pass @var{extra-cmds}, those commands will be inserted into
@file{config.status} to be run after all its other processing. If
@var{init-cmds} are given, they are inserted just before
