[PULL 25/46] meson: fix migration/stress compilation with glibc>=2.30

[Paolo Bonzini]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

gettid() was introduced with glibc 2.30.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20200828110734.1638685-16-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 meson.build              | 3 +++
 tests/migration/stress.c | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/meson.build b/meson.build
index 7c714bb49c..b71f561c96 100644
--- a/meson.build
+++ b/meson.build
@@ -413,6 +413,8 @@ endif
 keyutils = dependency('libkeyutils', required: false,
                       method: 'pkg-config', static: enable_static)
 
+has_gettid = cc.has_function('gettid')
+
 # Create config-host.h
 
 config_host_data.set('CONFIG_SDL', sdl.found())
@@ -423,6 +425,7 @@ config_host_data.set('CONFIG_VNC_PNG', png.found())
 config_host_data.set('CONFIG_VNC_SASL', sasl.found())
 config_host_data.set('CONFIG_XKBCOMMON', xkbcommon.found())
 config_host_data.set('CONFIG_KEYUTILS', keyutils.found())
+config_host_data.set('CONFIG_GETTID', has_gettid)
 config_host_data.set('QEMU_VERSION', '"@0@"'.format(meson.project_version()))
 config_host_data.set('QEMU_VERSION_MAJOR', 
meson.project_version().split('.')[0])
 config_host_data.set('QEMU_VERSION_MINOR', 
meson.project_version().split('.')[1])
diff --git a/tests/migration/stress.c b/tests/migration/stress.c
index 05d85051e3..0c72a420be 100644
--- a/tests/migration/stress.c
+++ b/tests/migration/stress.c
@@ -29,10 +29,12 @@ const char *argv0;
 
 #define PAGE_SIZE 4096
 
+#ifndef CONFIG_GETTID
 static int gettid(void)
 {
     return syscall(SYS_gettid);
 }
+#endif
 
 static __attribute__((noreturn)) void exit_failure(void)
 {
-- 
2.26.2