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We don't actually check that -Wno-attribute does what
we think it does. On clang it doesn't since it happily
seems to recognize but ignore the attribute.
This patch factors out a silent version of CAIRO_CC_TRY_FLAG
which accepts an optional program argument and actually tests
that the compiler doesn't produce any warning messages. It
is then used to check that -Wno-attribute doesn't complain
when the __warn_unused_result__ attribute is applied to
void functions or variables.
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As the number of places where we add valgrind client requests grows, it
becomes imperative that we should be able to disable them with a simple
configure time option.
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We need to add --coverage to LDFLAGS, so create CAIRO_LDFLAGS and use that
to populate AM_LDFLAGS.
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Rename the temporary variable in line with the convention used by the rest
of the build system.
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Add the core support to cairo-test for running the test-suite under a
malloc fault injector. This commit contains the adjustments to
cairo_test_run() to repeat the test if it detects a failure due to fault
injection and complains if it detects unreported faults or memory leaks.
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--coverage is a synonym for "--fprofile-arcs --ftest-coverage" during
compilation *and* "--lgcov" during linking. One might think this would
be a perfect workaround for the broken debian libtool which stopped the
linker seeing -lgcov - but they strip CFLAGS as well. Oh well.
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Also rename configure.in to configure.ac (finally)
configure.in -> configure.ac
build/analysis.ac -> build/configure.ac.analysis
build/enable.ac -> build/configure.ac.enable
build/system.ac -> build/configure.ac.system
build/tools.ac -> build/configure.ac.tools
build/version.ac -> build/configure.ac.version
build/warnings.ac -> build/configure.ac.warnings
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