Manvendra Bhangui writes:
On Wed, 1 Jun 2022 at 09:39, Sam Varshavchik <mr...@courier-mta.com> wrote: > > Download: https://www.courier-mta.org/download.html > > New development builds of all packages. > > Changes: >> > - all: updates for gcc 12, autotools, and OpenSSL 3.0. > Not very important, but I thought it could help someone still using ancient distros to compile courier-imap. The latest autotools changes to configure.ac removing AC_PROG_CC_C99 has broken compilation on the following distributions. CentOS7 RHEL7 SLE12 and all SLE12 variants Ubuntu 16.04 I had to do 4 minor changes to make courier-imap compile on all distributions, including the above 3
Autoconf deprecated the AC_PROG_CC_C99 macro, for the ostensibly reason that all currently supported major platforms don't need it.
There's automation on Github to automatically build everything on every commit, using containers. The CentOS 7 container had no issues building a courier-imap centos 7 rpm:
https://github.com/svarshavchik/courier/runs/6764330421?check_suite_focus=trueThe likely explanation is that the original compiler that was released for CentOS 7 did not default to c++11/C99 by default, but was updated over CentOS 7's lifetime to a newer version that does, now.
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