67 lines
2.0 KiB
Diff
67 lines
2.0 KiB
Diff
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Discover monotonic clock using compile-time check
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monotonic clock check does not work when cross-compiling.
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Upstream-Status: Denied [Does not work on OpenBSD]
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Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
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Original patch follows:
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When xorg-xserver is being cross-compiled, there is currently no way
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for us to detect whether the monotonic clock is available on the
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target system, because we aren't able to run a test program on the host
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system. Currently, in this situation, we default to not use the
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monotonic clock. One problem with this situation is that the user will
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be treated as idle when the date is updated.
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To fix this situation, we now use a compile-time check to detect whether the
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monotonic clock is available. This check can run just fine when we are
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cross-compiling.
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Signed-off-by: David James <davidjames at google.com>
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Downloaded from
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https://github.com/openembedded/openembedded-core/blob/master/meta/recipes-graphics/xorg-xserver/xserver-xorg/0001-configure.ac-Fix-check-for-CLOCK_MONOTONIC.patch
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Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
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---
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configure.ac | 17 +++++++----------
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1 file changed, 7 insertions(+), 10 deletions(-)
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diff --git a/configure.ac b/configure.ac
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index f7ab48c..26e85cd 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -1048,19 +1048,16 @@ if ! test "x$have_clock_gettime" = xno; then
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CPPFLAGS="$CPPFLAGS -D_POSIX_C_SOURCE=200112L"
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fi
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- AC_RUN_IFELSE([AC_LANG_SOURCE([
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+ AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
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#include <time.h>
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-
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-int main(int argc, char *argv[[]]) {
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- struct timespec tp;
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-
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- if (clock_gettime(CLOCK_MONOTONIC, &tp) == 0)
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+#include <unistd.h>
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+int main() {
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+#if !(defined(_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 && defined(CLOCK_MONOTONIC))
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+ #error No monotonic clock
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+#endif
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return 0;
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- else
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- return 1;
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}
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- ])], [MONOTONIC_CLOCK=yes], [MONOTONIC_CLOCK=no],
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- [MONOTONIC_CLOCK="cross compiling"])
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+]])],[MONOTONIC_CLOCK=yes], [MONOTONIC_CLOCK=no])
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LIBS="$LIBS_SAVE"
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CPPFLAGS="$CPPFLAGS_SAVE"
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--
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2.1.4
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