Re: Failure building collectd when autoconf has been updated to 2.72

[Adolf Belka <adolf.belka@ipfire.org>]

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Hi Michael,

On 19/11/2024 12:41, Michael Tremer wrote:
> Hello Adolf,
> 
> In the build script we are running autoreconf which will regenerate the configure script:
> 
>    https://git.ipfire.org/?p=ipfire-2.x.git;a=blob;f=lfs/collectd;h=d1d4ea721386803c31599315de956373417c2dcf;hb=HEAD#l119
Ah yes, so when I have been looking at the configure script from the source tarball I was more than likely looking at a line number with different code in it than was actually used.

I should probably try and run the collectd patching and autoreconf and after that look at the configure script and see what is at the problem line number.
> 
> Is there any output of that command? There should be some warnings which might help us to find out what we need to change.
There is quite a bit and a lot of warnings about variables that are obsolete but i can't tell what might be a problem. Having the correct configure script to look at the actual command at the mentioned line number is probably a good first step.

Here is the log output for the autoupdate, autoreconf and autoreconf in libltdl after all the patches have been applied. Maybe you can see something that doesn't look right. I will try and get the actual configure file that is created and see what is at line 18710 in that file.

cd /usr/src/collectd-4.10.9 && autoupdate -v configure.in
autoupdate: running: echo dumpdef | /tools_x86_64/bin/m4 2>/tmp/auCniUF5/m4.defs >/dev/null
autom4te: the trace request object is:
autom4te: $VAR1 = bless( [
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autom4te:                    '/usr/share/autoconf/m4sugar/m4sh.m4',
autom4te:                    '/usr/share/autoconf/autoconf/autoconf.m4',
autom4te:                    'aclocal.m4',
autom4te:                    '/dev/null'
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autom4te: running: /tools_x86_64/bin/m4 --nesting-limit=1024 --gnu --include=/usr/share/autoconf --debug=aflq --fatal-warning --debugfile=autom4te.cache/traces.0t --trace=AC_CANONICAL_BUILD --trace=AC_CANONICAL_HOST --trace=AC_CANONICAL_SYSTEM --trace=AC_CANONICAL_TARGET --trace=AC_CONFIG_AUX_DIR --trace=AC_CONFIG_FILES --trace=AC_CONFIG_HEADERS --trace=AC_CONFIG_LIBOBJ_DIR --trace=AC_CONFIG_LINKS --trace=AC_CONFIG_MACRO_DIR_TRACE --trace=AC_CONFIG_SUBDIRS --trace=AC_DEFINE_TRACE_LITERAL --trace=AC_FC_FREEFORM --trace=AC_FC_PP_DEFINE --trace=AC_FC_PP_SRCEXT --trace=AC_FC_SRCEXT --trace=AC_INIT --trace=AC_LIBSOURCE --trace=AC_PROG_LIBTOOL --trace=AC_REQUIRE_AUX_FILE --trace=AC_SUBST --trace=AC_SUBST_TRACE --trace=AH_OUTPUT --trace=AM_AUTOMAKE_VERSION --trace=AM_CONDITIONAL --trace=AM_ENABLE_MULTILIB --trace=AM_EXTRA_RECURSIVE_TARGETS --trace=AM_GNU_GETTEXT --trace=AM_GNU_GETTEXT_INTL_SUBDIR --trace=AM_INIT_AUTOMAKE --trace=AM_MAINTAINER_MODE --trace=AM_MAKEFILE_INCLUDE --trace=AM_NLS --trace=AM_PATH_GUILE --trace=AM_POT_TOOLS --trace=AM_PROG_AR --trace=AM_PROG_CC_C_O --trace=AM_PROG_CXX_C_O --trace=AM_PROG_F77_C_O --trace=AM_PROG_FC_C_O --trace=AM_PROG_LIBTOOL --trace=AM_PROG_MKDIR_P --trace=AM_PROG_MOC --trace=AM_SILENT_RULES --trace=AM_XGETTEXT_OPTION --trace=AU_DEFINE --trace=GTK_DOC_CHECK --trace=IT_PROG_INTLTOOL --trace=LT_CONFIG_LTDL_DIR --trace=LT_INIT --trace=LT_SUPPORTED_TAG --trace=_AM_COND_ELSE --trace=_AM_COND_ENDIF --trace=_AM_COND_IF --trace=_AM_MAKEFILE_INCLUDE --trace=_AM_SUBST_NOTMAKE --trace=_LT_AC_TAGCONFIG --trace=_m4_warn --trace=define --trace=include --trace=m4_define --trace=m4_include --trace=m4_pattern_allow --trace=m4_pattern_forbid --trace=m4_sinclude --trace=sinclude /usr/share/autoconf/m4sugar/m4sugar.m4 /usr/share/autoconf/m4sugar/m4sh.m4 /usr/share/autoconf/autoconf/autoconf.m4 aclocal.m4 /dev/null > autom4te.cache/output.0t
aclocal.m4:16: warning: this file was generated for autoconf 2.67.
You have another version of autoconf.  It may work, but is not guaranteed to.
If you have problems, you may need to regenerate the build system entirely.
To do so, use the procedure documented by the package, typically `autoreconf'.
autom4te: formatting traces for '/tmp/am4t7DDKJt/warnings': _m4_warn
autom4te: reading /tmp/am4t7DDKJt/warnings
autom4te: formatting traces for '-': AU_DEFINE, define, m4_define
autoupdate: running: /usr/bin/autom4te --language=autoconf --verbose --include=/usr/share/autoconf --trace AU_DEFINE:'_au_defun(@<:@$1@:>@,
autoupdate: @<:@$2@:>@)' --melt /dev/null >/tmp/auCniUF5/au.m4
autom4te: formatting traces for '/tmp/am4tmsyTME/dependencies': include, m4_include
autom4te: up_to_date (autom4te.cache/output.0): up to date
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autom4te: formatting traces for '/tmp/am4tmsyTME/warnings': _m4_warn
autom4te: reading /tmp/am4tmsyTME/warnings
autom4te: formatting traces for '-': AU_DEFINE
autoupdate: running: /tools_x86_64/bin/m4 --include=/tmp/auCniUF5 --include=/usr/share/autoconf /tmp/auCniUF5/input.m4 > /tmp/auCniUF5/updated
configure.in:121: warning: The preprocessor macro 'STDC_HEADERS' is obsolete.
   Except in unusual embedded environments, you can safely include all
   C89 headers unconditionally.
configure.in:500: warning: Update your code to rely only on HAVE_SYS_TIME_H,
then remove this warning and the obsolete code below it.
All current systems provide time.h; it need not be checked for.
Not all systems provide sys/time.h, but those that do, all allow
you to include it and time.h simultaneously.
configure.in:505: warning: AC_PROG_GCC_TRADITIONAL is obsolete; use AC_PROG_CC

autoupdate: 'configure.in' is updated
cd /usr/src/collectd-4.10.9 && autoreconf -vfi
autoreconf: export WARNINGS=
autoreconf: warning: autoconf input should be named 'configure.ac', not 'configure.in'
autoreconf: Entering directory '.'
autoreconf: configure.in: not using Gettext
autoreconf: running: aclocal --force -I libltdl/m4
aclocal: warning: autoconf input should be named 'configure.ac', not 'configure.in'
autoreconf: configure.in: tracing
autoreconf: configure.in: adding subdirectory libltdl to autoreconf
autoreconf: Entering directory 'libltdl'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --force -I m4
autoreconf: configure.ac: tracing
autoreconf: running: libtoolize --copy --force --ltdl
libtoolize: putting auxiliary files in AC_CONFIG_AUX_DIR, 'config'.
libtoolize: copying file 'config/compile'
libtoolize: copying file 'config/config.guess'
libtoolize: copying file 'config/config.sub'
libtoolize: copying file 'config/depcomp'
libtoolize: copying file 'config/install-sh'
libtoolize: copying file 'config/missing'
libtoolize: copying file 'config/ltmain.sh'
libtoolize: putting macros in AC_CONFIG_MACRO_DIRS, 'm4'.
libtoolize: copying file 'm4/libtool.m4'
libtoolize: copying file 'm4/ltargz.m4'
libtoolize: You should add the contents of 'm4/ltargz.m4' to 'aclocal.m4'.
libtoolize: copying file 'm4/ltdl.m4'
libtoolize: copying file 'm4/ltoptions.m4'
libtoolize: copying file 'm4/ltsugar.m4'
libtoolize: copying file 'm4/ltversion.m4'
libtoolize: copying file 'm4/lt~obsolete.m4'
libtoolize: putting libltdl files in LT_CONFIG_LTDL_DIR, '.'.
libtoolize: copying file './COPYING.LIB'
libtoolize: creating file './Makefile.am'
libtoolize: copying file './README'
libtoolize: creating file './configure.ac'
libtoolize: creating file './aclocal.m4'
libtoolize: creating file './Makefile.in'
libtoolize: copying file './config-h.in'
libtoolize: creating file './configure'
libtoolize: copying file './libltdl/lt__alloc.h'
libtoolize: copying file './libltdl/lt__argz_.h'
libtoolize: copying file './libltdl/lt__dirent.h'
libtoolize: copying file './libltdl/lt__glibc.h'
libtoolize: copying file './libltdl/lt__private.h'
libtoolize: copying file './libltdl/lt__strl.h'
libtoolize: copying file './libltdl/lt_dlloader.h'
libtoolize: copying file './libltdl/lt_error.h'
libtoolize: copying file './libltdl/lt_system.h'
libtoolize: copying file './libltdl/slist.h'
libtoolize: copying file './loaders/dld_link.c'
libtoolize: copying file './loaders/dlopen.c'
libtoolize: copying file './loaders/dyld.c'
libtoolize: copying file './loaders/load_add_on.c'
libtoolize: copying file './loaders/loadlibrary.c'
libtoolize: copying file './loaders/preopen.c'
libtoolize: copying file './loaders/shl_load.c'
libtoolize: copying file './lt__alloc.c'
libtoolize: copying file './lt__argz.c'
libtoolize: copying file './lt__dirent.c'
libtoolize: copying file './lt__strl.c'
libtoolize: copying file './lt_dlloader.c'
libtoolize: copying file './lt_error.c'
libtoolize: copying file './ltdl.c'
libtoolize: copying file './ltdl.h'
libtoolize: copying file './slist.c'
libtoolize: Remember to add 'LTDL_INIT' to configure.ac.
autoreconf: configure.ac: not using Intltool
autoreconf: configure.ac: not using Gtkdoc
autoreconf: running: aclocal --force -I m4
autoreconf: running: /usr/bin/autoconf --force
autoreconf: running: /usr/bin/autoheader --force
autoreconf: running: automake --add-missing --copy --force-missing
autoreconf: Leaving directory 'libltdl'
autoreconf: running: libtoolize --copy --force --ltdl --ltdl
libtoolize: putting auxiliary files in AC_CONFIG_AUX_DIR, 'libltdl/config'.
libtoolize: copying file 'libltdl/config/compile'
libtoolize: copying file 'libltdl/config/config.guess'
libtoolize: copying file 'libltdl/config/config.sub'
libtoolize: copying file 'libltdl/config/depcomp'
libtoolize: copying file 'libltdl/config/install-sh'
libtoolize: copying file 'libltdl/config/missing'
libtoolize: copying file 'libltdl/config/ltmain.sh'
libtoolize: putting macros in 'libltdl/m4'.
libtoolize: copying file 'libltdl/m4/libtool.m4'
libtoolize: copying file 'libltdl/m4/ltargz.m4'
libtoolize: You should add the contents of 'libltdl/m4/ltargz.m4' to 'aclocal.m4'.
libtoolize: copying file 'libltdl/m4/ltdl.m4'
libtoolize: copying file 'libltdl/m4/ltoptions.m4'
libtoolize: copying file 'libltdl/m4/ltsugar.m4'
libtoolize: copying file 'libltdl/m4/ltversion.m4'
libtoolize: copying file 'libltdl/m4/lt~obsolete.m4'
libtoolize: putting libltdl files in 'libltdl'.
libtoolize: copying file 'libltdl/COPYING.LIB'
libtoolize: creating file 'libltdl/Makefile.am'
libtoolize: copying file 'libltdl/README'
libtoolize: creating file 'libltdl/configure.ac'
libtoolize: creating file 'libltdl/aclocal.m4'
libtoolize: creating file 'libltdl/Makefile.in'
libtoolize: copying file 'libltdl/config-h.in'
libtoolize: creating file 'libltdl/configure'
libtoolize: copying file 'libltdl/libltdl/lt__alloc.h'
libtoolize: copying file 'libltdl/libltdl/lt__argz_.h'
libtoolize: copying file 'libltdl/libltdl/lt__dirent.h'
libtoolize: copying file 'libltdl/libltdl/lt__glibc.h'
libtoolize: copying file 'libltdl/libltdl/lt__private.h'
libtoolize: copying file 'libltdl/libltdl/lt__strl.h'
libtoolize: copying file 'libltdl/libltdl/lt_dlloader.h'
libtoolize: copying file 'libltdl/libltdl/lt_error.h'
libtoolize: copying file 'libltdl/libltdl/lt_system.h'
libtoolize: copying file 'libltdl/libltdl/slist.h'
libtoolize: copying file 'libltdl/loaders/dld_link.c'
libtoolize: copying file 'libltdl/loaders/dlopen.c'
libtoolize: copying file 'libltdl/loaders/dyld.c'
libtoolize: copying file 'libltdl/loaders/load_add_on.c'
libtoolize: copying file 'libltdl/loaders/loadlibrary.c'
libtoolize: copying file 'libltdl/loaders/preopen.c'
libtoolize: copying file 'libltdl/loaders/shl_load.c'
libtoolize: copying file 'libltdl/lt__alloc.c'
libtoolize: copying file 'libltdl/lt__argz.c'
libtoolize: copying file 'libltdl/lt__dirent.c'
libtoolize: copying file 'libltdl/lt__strl.c'
libtoolize: copying file 'libltdl/lt_dlloader.c'
libtoolize: copying file 'libltdl/lt_error.c'
libtoolize: copying file 'libltdl/ltdl.c'
libtoolize: copying file 'libltdl/ltdl.h'
libtoolize: copying file 'libltdl/slist.c'
libtoolize: Remember to add 'LTDL_INIT' to configure.in.
libtoolize: Remember to add 'LT_CONFIG_LTDL_DIR([libltdl])' to 'configure.in'.
libtoolize: Consider adding 'AC_CONFIG_MACRO_DIRS([libltdl/m4])' to configure.in,
libtoolize: and rerunning libtoolize and aclocal.
autoreconf: configure.in: not using Intltool
autoreconf: configure.in: not using Gtkdoc
autoreconf: running: aclocal --force -I libltdl/m4
aclocal: warning: autoconf input should be named 'configure.ac', not 'configure.in'
autoreconf: running: /usr/bin/autoconf --force
configure.in:51: warning: AC_PROG_LEX without either yywrap or noyywrap is obsolete
./lib/autoconf/programs.m4:743: _AC_PROG_LEX is expanded from...
./lib/autoconf/programs.m4:736: AC_PROG_LEX is expanded from...
configure.in:51: the top level
configure.in:125: warning: The preprocessor macro 'STDC_HEADERS' is obsolete.
configure.in:125:   Except in unusual embedded environments, you can safely include all
configure.in:125:   C89 headers unconditionally.
configure.in:512: warning: Update your code to rely only on HAVE_SYS_TIME_H,
configure.in:512: then remove this warning and the obsolete code below it.
configure.in:512: All current systems provide time.h; it need not be checked for.
configure.in:512: Not all systems provide sys/time.h, but those that do, all allow
configure.in:512: you to include it and time.h simultaneously.
configure.in:530: warning: AC_PROG_GCC_TRADITIONAL is obsolete; use AC_PROG_CC
configure.in:533: warning: ac_ext=c
configure.in:533: ac_cpp='$CPP $CPPFLAGS'
configure.in:533: ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
configure.in:533: ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
configure.in:533: ac_compiler_gnu=$ac_cv_c_compiler_gnu
configure.in:533: if test -n "$ac_tool_prefix"; then
configure.in:533:   # Extract the first word of "${ac_tool_prefix}gcc", so it can be a program name with args.
configure.in:533: set dummy ${ac_tool_prefix}gcc; ac_word=$2
configure.in:533: { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
configure.in:533: printf %s "checking for $ac_word... " >&6; }
configure.in:533: if test ${ac_cv_prog_CC+y}
configure.in:533: then :
configure.in:533:   printf %s "(cached) " >&6
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configure.in:533: do
configure.in:533:   IFS=$as_save_IFS
configure.in:533:   case $as_dir in #(((
configure.in:533:     '') as_dir=./ ;;
configure.in:533:     */) ;;
configure.in:533:     *) as_dir=$as_dir/ ;;
configure.in:533:   esac
configure.in:533:     for ac_exec_ext in '' $ac_executable_extensions; do
configure.in:533:   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
configure.in:533:     ac_cv_prog_CC="${ac_tool_prefix}gcc"
configure.in:533:     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
configure.in:533:     break 2
configure.in:533:   fi
configure.in:533: done
configure.in:533:   done
configure.in:533: IFS=$as_save_IFS
configure.in:533:
configure.in:533: fi ;;
configure.in:533: esac
configure.in:533: fi
configure.in:533: CC=$ac_cv_prog_CC
configure.in:533: if test -n "$CC"; then
configure.in:533:   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CC" >&5
configure.in:533: printf "%s\n" "$CC" >&6; }
configure.in:533: else
configure.in:533:   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
configure.in:533: printf "%s\n" "no" >&6; }
configure.in:533: fi
configure.in:533:
configure.in:533:
configure.in:533: fi
configure.in:533: if test -z "$ac_cv_prog_CC"; then
configure.in:533:   ac_ct_CC=$CC
configure.in:533:   # Extract the first word of "gcc", so it can be a program name with args.
configure.in:533: set dummy gcc; ac_word=$2
configure.in:533: { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
configure.in:533: printf %s "checking for $ac_word... " >&6; }
configure.in:533: if test ${ac_cv_prog_ac_ct_CC+y}
configure.in:533: then :
configure.in:533:   printf %s "(cached) " >&6
configure.in:533: else case e in #(
configure.in:533:   e) if test -n "$ac_ct_CC"; then
configure.in:533:   ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
configure.in:533: else
configure.in:533: as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
configure.in:533: for as_dir in $PATH
configure.in:533: do
configure.in:533:   IFS=$as_save_IFS
configure.in:533:   case $as_dir in #(((
configure.in:533:     '') as_dir=./ ;;
configure.in:533:     */) ;;
configure.in:533:     *) as_dir=$as_dir/ ;;
configure.in:533:   esac
configure.in:533:     for ac_exec_ext in '' $ac_executable_extensions; do
configure.in:533:   if as_fn_executable_p "$as_dir$ac_word$ac_exec_ext"; then
configure.in:533:     ac_cv_prog_ac_ct_CC="gcc"
configure.in:533:     printf "%s\n" "$as_me:${as_lineno-$LINENO}: found $as_dir$ac_word$ac_exec_ext" >&5
configure.in:533:     break 2
configure.in:533:   fi
configure.in:533: done
configure.in:533:   done
configure.in:533: IFS=$as_save_IFS
configure.in:533:
configure.in:533: fi ;;
configure.in:533: esac
configure.in:533: fi
configure.in:533: ac_ct_CC=$ac_cv_prog_ac_ct_CC
configure.in:533: if test -n "$ac_ct_CC"; then
configure.in:533:   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_ct_CC" >&5
configure.in:533: printf "%s\n" "$ac_ct_CC" >&6; }
configure.in:533: else
configure.in:533:   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
configure.in:533: printf "%s\n" "no" >&6; }
configure.in:533: fi
configure.in:533:
configure.in:533:   if test "x$ac_ct_CC" = x; then
configure.in:533:     CC=""
configure.in:533:   else
configure.in:533:     case $cross_compiling:$ac_tool_warned in
configure.in:533: yes: is m4_require'd but not m4_defun'd
./lib/autoconf/programs.m4:189: _AC_TOOL_WARN is expanded from...
./lib/autoconf/programs.m4:221: AC_CHECK_TOOL is expanded from...
./lib/autoconf/c.m4:460: AC_PROG_CC is expanded from...
configure.in:533: the top level
autoreconf: running: /usr/bin/autoheader --force
autoheader: warning: autoconf input should be named 'configure.ac', not 'configure.in'
autoreconf: running: automake --add-missing --copy --force-missing
automake: warning: autoconf input should be named 'configure.ac', not 'configure.in'
Makefile.am:5: warning: 'INCLUDES' is the old name for 'AM_CPPFLAGS' (or '*_CPPFLAGS')
automake: warning: autoconf input should be named 'configure.ac', not 'configure.in'
autoreconf: Leaving directory '.'
cd /usr/src/collectd-4.10.9/libltdl && autoreconf -vfi
autoreconf: export WARNINGS=
autoreconf: Entering directory '.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --force -I m4
autoreconf: configure.ac: tracing
autoreconf: running: libtoolize --copy --force --ltdl
libtoolize: putting auxiliary files in AC_CONFIG_AUX_DIR, 'config'.
libtoolize: copying file 'config/compile'
libtoolize: copying file 'config/config.guess'
libtoolize: copying file 'config/config.sub'
libtoolize: copying file 'config/depcomp'
libtoolize: copying file 'config/install-sh'
libtoolize: copying file 'config/missing'
libtoolize: copying file 'config/ltmain.sh'
libtoolize: putting macros in 'm4'.
libtoolize: copying file 'm4/libtool.m4'
libtoolize: copying file 'm4/ltargz.m4'
libtoolize: copying file 'm4/ltdl.m4'
libtoolize: copying file 'm4/ltoptions.m4'
libtoolize: copying file 'm4/ltsugar.m4'
libtoolize: copying file 'm4/ltversion.m4'
libtoolize: copying file 'm4/lt~obsolete.m4'
libtoolize: putting libltdl files in LT_CONFIG_LTDL_DIR, '.'.
libtoolize: copying file './COPYING.LIB'
libtoolize: creating file './Makefile.am'
libtoolize: copying file './README'
libtoolize: creating file './configure.ac'
libtoolize: creating file './aclocal.m4'
libtoolize: creating file './Makefile.in'
libtoolize: copying file './config-h.in'
libtoolize: creating file './configure'
libtoolize: copying file './libltdl/lt__alloc.h'
libtoolize: copying file './libltdl/lt__argz_.h'
libtoolize: copying file './libltdl/lt__dirent.h'
libtoolize: copying file './libltdl/lt__glibc.h'
libtoolize: copying file './libltdl/lt__private.h'
libtoolize: copying file './libltdl/lt__strl.h'
libtoolize: copying file './libltdl/lt_dlloader.h'
libtoolize: copying file './libltdl/lt_error.h'
libtoolize: copying file './libltdl/lt_system.h'
libtoolize: copying file './libltdl/slist.h'
libtoolize: copying file './loaders/dld_link.c'
libtoolize: copying file './loaders/dlopen.c'
libtoolize: copying file './loaders/dyld.c'
libtoolize: copying file './loaders/load_add_on.c'
libtoolize: copying file './loaders/loadlibrary.c'
libtoolize: copying file './loaders/preopen.c'
libtoolize: copying file './loaders/shl_load.c'
libtoolize: copying file './lt__alloc.c'
libtoolize: copying file './lt__argz.c'
libtoolize: copying file './lt__dirent.c'
libtoolize: copying file './lt__strl.c'
libtoolize: copying file './lt_dlloader.c'
libtoolize: copying file './lt_error.c'
libtoolize: copying file './ltdl.c'
libtoolize: copying file './ltdl.h'
libtoolize: copying file './slist.c'
libtoolize: Remember to add 'LTDL_INIT' to configure.ac.
libtoolize: Consider adding 'AC_CONFIG_MACRO_DIRS([m4])' to configure.ac,
libtoolize: and rerunning libtoolize and aclocal.
autoreconf: configure.ac: not using Intltool
autoreconf: configure.ac: not using Gtkdoc
autoreconf: running: aclocal --force -I m4
autoreconf: running: /usr/bin/autoconf --force
autoreconf: running: /usr/bin/autoheader --force
autoreconf: running: automake --add-missing --copy --force-missing
autoreconf: Leaving directory '.'

Regards,
Adolf.

> 
>> On 13 Nov 2024, at 10:30, Adolf Belka <adolf.belka(a)ipfire.org> wrote:
>>
>> Hi All,
>>
>> I did an update run with autoconf taking it from 2.71 to 2.72
>>
>> autoconf built without any problems, however collectd then failed for a syntax error in the configure file.
>>
>> Confirmed that this was due to autoconf by changing the versions back and forward and the problem went away and then came back again.
>>
>> The collectd build error message is
>>
>> checking for size_t... yes
>> checking for uid_t... yes
>> checking for gid_t... yes
>> ./configure: line 18710: syntax error near unexpected token `newline'
>> ./configure: line 18710: `yes:'
>> make: *** [collectd:120: /usr/src/log/collectd-4.10.9] Error 2
>>
>> The section around line 18710 in the configure file is
>>
>> 18707    do :
>> 18708       as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
>> 18709    ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
>> 18710    if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
> 
> There is an extra : here which is probably what causes the syntax error.
> 
>> 18711      cat >>confdefs.h <<_ACEOF
>> 18712    #define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
>> 18713    _ACEOF
>> 18714
>> 18715    else
>> 18716      with_libiptc="no (header file missing)"
>> 18717    fi
>>
>> However there are 15 occurrences of the exact same text as line 18710 in the configure file so I am not convinced if that line is the root cause for the syntax error but some other earlier error that causes a knock-on effect.
>>
>> However, my knowledge of the coding syntax is definitely not enough to figure out what needs to be fixed/changed.
>>
>> As collectd is a very old version it is likely that some structural coding or syntax was fine in the past but now with the change from autoconf-2.71 to 2.72 it is no longer allowed, or is flagged up when in the past it was just ignored.
>>
>> There are quite a few changes in autoconf-2.72 with some being marked as backwards compatibilities. All of them except one say that existing configure scripts will continue working. The one that doesn't mention that is the following change:-
>>
>>    Configure scripts no longer support pre-1989 C compilers.
>>    Specifically, compilers that *only* implement the original “K&R”
>>    function definition syntax, and not the newer “prototyped” syntax,
>>    will not be able to parse the test programs now emitted by
>>    AC_CHECK_FUNC, AC_LANG_CALL, and similar macros.  AC_PROG_CC still
>>    accepts such compilers, but this may change in the near future.
>>
>>    This change was necessary in order to support the upcoming 2024
>>    edition of the C standard (often referred to as “C23”), which will
>>    officially remove the function declaration syntax used by
>>    AC_CHECK_FUNC in Autoconf 2.71 and earlier.  We feel that support
>>    for compilers that support only C 2024 is more useful, nowadays,
>>    than support for compilers that don’t implement a core feature of
>>    C 1989.
>>
>> However I am unable to figure out from this if the problem I am experiencing is related to this or not. I would not have thought so as I don't believe we are using a pre-1989 C compiler.
>>
>> Any ideas from anyone on how to fix this issue?
>>
>> There is nothing critical from a security or other vulnerability aspect in autoconf-2.72 but it would be nice to figure this out before we get to a stage where it has to be made to work.
>>
>>
>> Regards,
>>
>> Adolf.
>>
>