On Mon, 20 Jan 2020, Sébastien Hinderer wrote:

Vincent Blondel (2020/01/20 15:10 +0100):
both ..._stdcxxx.m4 files are in the m4 subfolder ... is that not
enough ?

As far as I know each .m4 file needs to be included explicitly.

That does appear to be the case. For example, my configure.ac uses acx_pthread.m4 and so the aclocal.m4 file includes this line

m4_include([m4/acx_pthread.m4])

Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
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