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Fix the following build failure without threads raised since switch to meson-package in commit1fa58814c0which wrongly removed -DCAIRO_NO_MUTEX=1: In file included from ../src/cairo-mutex-type-private.h:45, from ../src/cairo-scaled-font-private.h:45, from ../src/cairoint.h:415, from ../src/cairo-arc.c:37: ../src/cairo-mutex-impl-private.h:231:3: error: #error "XXX: No mutex implementation found. Cairo will not work with multiple threads. Define CAIRO_NO_MUTEX to 1 to acknowledge and accept this limitation and compile cairo without thread-safety support." 231 | # error "XXX: No mutex implementation found. Cairo will not work with multiple threads. Define CAIRO_NO_MUTEX to 1 to acknowledge and accept this limitation and compile cairo without thread-safety support." | ^~~~~ Note that prior to1fa58814c0, the condition was: ifeq ($(BR2_TOOLCHAIN_HAS_THREADS_NPTL),) CAIRO_CONF_ENV += CPPFLAGS="$(TARGET_CPPFLAGS) -DCAIRO_NO_MUTEX=1" endif but that was in fact wrong, because it meant that toolchain with linuxthreads (not NPTL) would have thread support, but a thread-unsafe cairo library. The condition was changed from BR2_TOOLCHAIN_HAS_THREADS to BR2_TOOLCHAIN_HAS_THREADS_NPTL in an older commit,92f14307ba, but now cairo's mutex support builds fine with linuxthreads, so we can use CAIRO_NO_MUTEX=1 only when thread support is not available at all. Fixes:1fa58814c0- http://autobuild.buildroot.org/results/a123355b6d315d2fcda646d3f1c7b588cba78258 Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
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