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util: gettid() is Linux-specific

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The manual page clearly states that

  gettid() is Linux-specific and should not be used in programs
  that are intended to be portable.

Unfortunately, it looks like macOS implemented the functionality
and defined SYS_gettid accordingly, only to deprecate syscall()
altogether with 10.12 (Sierra), released last late year.

To avoid compilation errors, call gettid() on Linux only.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
This commit is contained in:
Andrea Bolognani 2017-12-04 16:22:02 +01:00
parent 6dde44c86f
commit 77117e18b7
1 changed files with 1 additions and 1 deletions
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src/util/virthread.c
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@ -268,7 +268,7 @@ bool virThreadIsSelf(virThreadPtr thread)
* the pthread_self() id on Linux. */
unsigned long long virThreadSelfID(void)
{
#if defined(HAVE_SYS_SYSCALL_H) && defined(SYS_gettid)
#if defined(HAVE_SYS_SYSCALL_H) && defined(SYS_gettid) && defined(__linux__)
pid_t tid = syscall(SYS_gettid);
return tid;
#else