tree 3640cc1dd181afe9e9b4f19ff764e71cb0afe2d9
parent 24bb74732e9015d179462d9fab28dbb284f0366c
author Neels Hofmeyr <neels@hofmeyr.de> 1520279069 +0100
committer Neels Hofmeyr <nhofmeyr@sysmocom.de> 1520899432 +0000

configure: add --enable-werror

Provide a sane means of adding the -Werror compiler flag.

Currently, some of our jenkins.sh add -Werror by passing 'CFLAGS="-Werror"',
but that actually *overwrites* all the other CFLAGS we might want to have set.

Maintain these exceptions from -Werror:
a) deprecation (allow upstream to mark deprecation without breaking builds);
b) "#warning" pragmas (allow to remind ourselves of errors without breaking
   builds)

As a last configure step before generating the output files, print the complete
CFLAGS and CPPFLAGS by means of AC_MSG_RESULT.

Change-Id: Ifea235feb073a276302436936e908d9125c77a82