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patch 9.1.1664: configure: can use any autoconf

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Problem:  configure: can use any autocon
Solution: Use AC_PREREQ and require 2.71 (Damien Lejay)

technically, we require autoconf 2.72, but that is not available on
Ubuntu LTS 24.04. So let's go with 2.71 for now and add a comment about
it in configure.ac

closes: #18047

Signed-off-by: Damien Lejay <damien@lejay.be>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Damien Lejay
2025-08-22 12:36:43 -04:00
committed by Christian Brabandt
parent 5ca1ea83ad
commit ea3d465438
3 changed files with 35 additions and 17 deletions
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22
src/auto/configure vendored
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@@ -14507,18 +14507,18 @@ then :
fi
if test "$enable_largefile,$enable_year2038" != no,no
then :
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option to enable large file support" >&5
printf %s "checking for $CC option to enable large file support... " >&6; }
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CPPFLAGS option for large files" >&5
printf %s "checking for $CPPFLAGS option for large files... " >&6; }
if test ${ac_cv_sys_largefile_opts+y}
then :
printf %s "(cached) " >&6
else case e in #(
e) ac_save_CC="$CC"
e) ac_save_CPPFLAGS=$CPPFLAGS
ac_opt_found=no
for ac_opt in "none needed" "-D_FILE_OFFSET_BITS=64" "-D_LARGE_FILES=1" "-n32"; do
for ac_opt in "none needed" "-D_FILE_OFFSET_BITS=64" "-D_LARGE_FILES=1"; do
if test x"$ac_opt" != x"none needed"
then :
CC="$ac_save_CC $ac_opt"
CPPFLAGS="$ac_save_CPPFLAGS $ac_opt"
fi
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
@@ -14547,12 +14547,12 @@ then :
if test x"$ac_opt" = x"none needed"
then :
# GNU/Linux s390x and alpha need _FILE_OFFSET_BITS=64 for wide ino_t.
CC="$CC -DFTYPE=ino_t"
CPPFLAGS="$CPPFLAGS -DFTYPE=ino_t"
if ac_fn_c_try_compile "$LINENO"
then :
else case e in #(
e) CC="$CC -D_FILE_OFFSET_BITS=64"
e) CPPFLAGS="$CPPFLAGS -D_FILE_OFFSET_BITS=64"
if ac_fn_c_try_compile "$LINENO"
then :
ac_opt='-D_FILE_OFFSET_BITS=64'
@@ -14568,7 +14568,7 @@ fi
rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
test $ac_opt_found = no || break
done
CC="$ac_save_CC"
CPPFLAGS=$ac_save_CPPFLAGS
test $ac_opt_found = yes || ac_cv_sys_largefile_opts="support not detected" ;;
esac
@@ -14592,16 +14592,14 @@ printf "%s\n" "#define _FILE_OFFSET_BITS 64" >>confdefs.h
printf "%s\n" "#define _LARGE_FILES 1" >>confdefs.h
;; #(
"-n32") :
CC="$CC -n32" ;; #(
*) :
as_fn_error $? "internal error: bad value for \$ac_cv_sys_largefile_opts" "$LINENO" 5 ;;
esac
if test "$enable_year2038" != no
then :
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CC option for timestamps after 2038" >&5
printf %s "checking for $CC option for timestamps after 2038... " >&6; }
{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $CPPFLAGS option for timestamps after 2038" >&5
printf %s "checking for $CPPFLAGS option for timestamps after 2038... " >&6; }
if test ${ac_cv_sys_year2038_opts+y}
then :
printf %s "(cached) " >&6