#195 XeTeX's zlib failed to build with autoconf 2.70+ version

[Xiao Hanyu]

Hello,

I have confirmed that XeTeX failed to build itself with autoconf 2.70+ version due to the following code in source/libs/zlib/configure.ac

AC_HEADER_STDC
if test "x$ac_cv_header_stdc" != xyes; then
  AC_MSG_ERROR([Sorry, can't do anything for you])
fi

The rationale here is, AC_HEADER_STDC has been obsoleted and seems replaced by a no-op in autoconf 2.70+

Some similar issues in other projects:
- https://gerrit.asterisk.org/c/asterisk/+/15359
- https://gitlab.gnome.org/GNOME/libxslt/-/merge_requests/43
- https://gitlab.com/sane-project/backends/-/issues/409

If necessary I can provide a patch for this.

Thanks!

[Dmitriy Alexandrov]

Related MR:
https://sourceforge.net/p/xetex/code/merge-requests/6/

[Anonymous]

Thank you!