wdc: use HAVE_TM_GMTOFF meson configuration variable

Set the variable if the struct tm have a tm_gmtoff field.

Signed-off-by: Tokunori Ikegami <[email protected]>

Author: ikegami-t

meson.build

@@ -176,6 +176,20 @@ conf.set10(
     ),
     description: 'Does struct opal_key have a key_type field?'
 )
+conf.set(
+    'HAVE_TM_GMTOFF',
+    cc.compiles(
+        '''
+           #include <time.h>
+           int main(void) {
+                struct tm tm;
+                tm.tm_gmtoff = 1;
+           }
+        ''',
+        name: 'tm_gmtoff'
+    ),
+    description: 'Does struct tm have a tm_gmtoff field?'
+)
 
 if cc.has_function_attribute('fallthrough')
   conf.set('fallthrough', '__attribute__((__fallthrough__))')

plugins/wdc/wdc-utils.c

@@ -81,11 +81,11 @@ int wdc_UtilsGetTime(PUtilsTimeInfo timeInfo)
 	timeInfo->second		=  currTimeInfo.tm_sec;
 	timeInfo->msecs			=  0;
 	timeInfo->isDST			=  currTimeInfo.tm_isdst;
-#if (defined(__GLIBC__) && !defined(__UCLIBC__) && !defined(__MUSL__)) || defined(__FreeBSD__)
+#ifdef HAVE_TM_GMTOFF
 	timeInfo->zone			= -currTimeInfo.tm_gmtoff / 60;
-#else
+#else /* HAVE_TM_GMTOFF */
 	timeInfo->zone			= -1 * (timezone / SECONDS_IN_MIN);
-#endif
+#endif /* HAVE_TM_GMTOFF */
 
 	return WDC_STATUS_SUCCESS;
 }