meson.build: Check for statx()

Check whether the glibc provides statx() and if so, define CONFIG_STATX.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20201102161859.156603-4-mreitz@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

meson.build

@@ -736,6 +736,21 @@ if not has_malloc_trim and get_option('malloc_trim').enabled()
   endif
 endif
 
+# Check whether the glibc provides statx()
+
+statx_test = '''
+  #ifndef _GNU_SOURCE
+  #define _GNU_SOURCE
+  #endif
+  #include <sys/stat.h>
+  int main(void) {
+    struct statx statxbuf;
+    statx(0, "", 0, STATX_BASIC_STATS, &statxbuf);
+    return 0;
+  }'''
+
+has_statx = cc.links(statx_test)
+
 #################
 # config-host.h #
 #################
@@ -768,6 +783,7 @@ 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('CONFIG_MALLOC_TRIM', has_malloc_trim)
+config_host_data.set('CONFIG_STATX', has_statx)
 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])