For example, add $(AM_CFLAGS) to mumble_CFLAGS. Since $(WARN_CFLAGS) is
only added to $(AM_CFLAGS), this fixes the lack of inclusion of the
compiler warning flags in the compilation of half of flatpak.
Note that $(AM_*) variables are only used by automake if a more specific
(per-target) special variable is not defined instead. So if you define
mumble_CFLAGS, AM_CFLAGS will not be used for that target unless
explicitly included in mumble_CFLAGS.
See
https://www.gnu.org/software/automake/manual/html_node/Flag-Variables-Ordering.html.
Do the same for $(AM_LIBADD), $(AM_LDFLAGS), etc. These are not
currently defined, but it’s good practice to include them in
mumble_LIBADD (etc.) just in case they’re defined in future. Hopefully
their inclusions will be cargo-culted to any new targets which are
added, retaining full coverage of the code base.
Signed-off-by: Philip Withnall <withnall@endlessm.com>
Changes to the Makefile could include changes to the options passed
to gdbus-codegen, which would invalidate the output.
Signed-off-by: Simon McVittie <smcv@collabora.com>
A rule of the form
foo.c foo.h: foo.in
some-generator --output=foo foo.in
is essentially equivalent to writing the same rule once for each target:
foo.c: foo.in
some-generator --output=foo foo.in
foo.h: foo.in
some-generator --output=foo foo.in
In a parallel build, this can result in some-generator being run more
than once with the same inputs and outputs, leading to unpredictable
results if the outputs are overwritten in-place by two parallel copies
(particularly if the generator does not use the standard atomic-writing
trick of writing out a temporary file and renaming it over the top of
the intended name, which gdbus-codegen does not).
gdbus-codegen happens to write the .h file before the .c file, so
use the real build rules to generate the .c file, and consider the
.h file to be a side-effect.
Signed-off-by: Simon McVittie <smcv@collabora.com>
If flatpak is built from a separate build directory, code generation
fails because the directory structure is not in place. Create the
necessary directories before code generation.
Philip Withnall