omit m4 macros from source tree

[andy-bower]

Similar to build-aux/*, this directory can be sufficiently reconstructed with autoconf -i.

I had to install autoconf-archive on Debian to get the compiler detection working but that was a non-fatal failure anyway:

$ autoreconf -vis
autoreconf: export WARNINGS=
autoreconf: Entering directory '.'
autoreconf: running: autopoint
Creating directory build-aux
Copying file build-aux/config.rpath
Creating directory m4
Copying file m4/codeset.m4
Copying file m4/extern-inline.m4
Copying file m4/fcntl-o.m4
Copying file m4/gettext.m4
Copying file m4/glibc2.m4
Copying file m4/glibc21.m4
Copying file m4/iconv.m4
Copying file m4/intdiv0.m4
Copying file m4/intl.m4
Copying file m4/intldir.m4
Copying file m4/intlmacosx.m4
Copying file m4/intmax.m4
Copying file m4/inttypes-pri.m4
Copying file m4/inttypes_h.m4
Copying file m4/lcmessage.m4
Copying file m4/lib-ld.m4
Copying file m4/lib-link.m4
Copying file m4/lib-prefix.m4
Copying file m4/lock.m4
Copying file m4/longlong.m4
Copying file m4/nls.m4
Copying file m4/po.m4
Copying file m4/printf-posix.m4
Copying file m4/progtest.m4
Copying file m4/size_max.m4
Copying file m4/stdint_h.m4
Copying file m4/threadlib.m4
Copying file m4/uintmax_t.m4
Copying file m4/visibility.m4
Copying file m4/wchar_t.m4
Copying file m4/wint_t.m4
Copying file m4/xsize.m4
autoreconf: running: aclocal -I m4
autoreconf: configure.ac: tracing
autoreconf: configure.ac: not using Libtool
autoreconf: configure.ac: not using Intltool
autoreconf: configure.ac: not using Gtkdoc
autoreconf: running: /usr/bin/autoconf
autoreconf: running: /usr/bin/autoheader
autoreconf: running: automake --add-missing --no-force
configure.ac:16: installing 'build-aux/compile'
configure.ac:16: installing 'build-aux/config.guess'
configure.ac:16: installing 'build-aux/config.sub'
configure.ac:16: installing 'build-aux/install-sh'
configure.ac:19: installing 'build-aux/missing'
src/Makefile.am: installing 'build-aux/depcomp'
autoreconf: Leaving directory '.'

[t-brown]

Yeah, I was thinking the same thing. Also I don't know if I really care about compiler identification. Your output isn't showing any ax_* macros getting copied in (from the autoconf-archive). Interesting.

It also seems I am not actually call the C attribute check.

OK, happy to delete m4, could you also remove line 27 and line 103 from configure.ac?

[andy-bower]

Your output isn't showing any ax_* macros getting copied in (from the autoconf-archive). Interesting.

I noticed that, too, but it did make the configure warnings go away and stop the compiler identification in the summary from being blank!

I wonder if the content of the macros got moved into one of the other definition files.

But I'm with you on this... we don't actually need to know!

[t-brown]

LGTM. Thanks.