configure.ac: Add an option to use scripts/guix.scm's strict CFLAGS

The CFLAGS that are in the %common-strict-cflags in scripts/guix.scm
have been validated with both GCC and CLANG and they are useful to
find potential issues in the code or code that won't compile on
Android.

However while the scripts/guix.scm script is really useful to test
commits once they are ready, it is less convenient to use it when
fixing issues in commits that are still being worked on.

This is because it is not as fast as building libsamsung-ipc directly
because:
- it requires a clean source directory to work (this can be done with
  make distclean) so we can't reuse the current build output
- libsamsung-ipc source code is copied and built 5 times (in different
  configurations)

As for the implementation, AM_CFLAGS was used instead of appending to
the default CFLAGS as CFLAGS is meant to be a variable for users. The
effect is that both are independent, so if users don't want strict
CFLAGS, they would need to not use --enable-strict-cflags.

And it was implemented as a shell script to at the same time:
- Enable to have comments, and good formating of the flags.
- Enable to share the cflags between guix.scm and the autotools.
- Keep the complexity low to keep it working in most situations.

Signed-off-by: Denis 'GNUtoo' Carikli <GNUtoo@cyberdimension.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/tools/ipc-modem/Makefile.am b/tools/ipc-modem/Makefile.am
index 069f082..2f6b537 100644
--- a/tools/ipc-modem/Makefile.am
+++ b/tools/ipc-modem/Makefile.am
@@ -4,6 +4,10 @@ AM_CFLAGS = \
 	-I$(top_srcdir)/include \
 	$(NULL)
 
+if WANT_STRICT_CFLAGS
+AM_CFLAGS += $(STRICT_CFLAGS)
+endif
+
 bin_PROGRAMS = ipc-modem
 
 # TODO: Find a way to make test more modular and represent each run of the