C99 compatibility fixes for gnupg 1

[Florian Weimer]

Is gnupg 1 still being maintained?  The configure script needs a few
changes to avoid behavioral changes once compilers no longer support
implicit function declarations by default.

Related to:

  <https://fedoraproject.org/wiki/Changes/PortingToModernC>
  <https://fedoraproject.org/wiki/Toolchain/PortingToModernC>

Thanks,
Florian
-------------- next part --------------
A non-text attachment was scrubbed...
Name: gnupg1-configure-c99.patch
Type: text/x-patch
Size: 1294 bytes
Desc: not available
URL: <https://lists.gnupg.org/pipermail/gnupg-devel/attachments/20230127/a4eb20c3/attachment.bin>