extras: tools: add .m4 dependency for .buildautoconf (!4808) · Merge requests · VideoLAN / VLC

Alexandre Janniaux requested to merge alexandre-janniaux/vlc:m4-tools/1 into master Jan 17, 2024

Autoconf will require m4 to build correctly, and will complain with the following error, at least starting with Autoconf 2.72, when the system provided m4 is too old:

GNU M4 1.4.8 or later is required; 1.4.16 or newer is recommended.
GNU M4 1.4.15 uses a buggy replacement strstr on some systems.
Glibc 2.9 - 2.12 and GNU M4 1.4.11 - 1.4.15 have another strstr bug.
yes
checking whether stricmp is declared... make: *** [.buildautoconf] Error 1
make: *** Waiting for unfinished jobs....

Ensure that whenever we need to build m4, we build it before autoconf.

extras: tools: add .m4 dependency for .buildautoconf

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