tree 94a9ee76224b7e783208f83dcd8917a8d0d4fa09
parent 3050864b7360cc7a168a850f7a1d839a805c54a9
author Neels Hofmeyr <neels@hofmeyr.de> 1520278990 +0100
committer Neels Hofmeyr <neels@hofmeyr.de> 1520278990 +0100

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: Id659512d2d9fb3f28584ec5f071907f6b6e72e0d