Detect TLS support in compiler

Author: michaelforney

pkg/e2fsprogs/config.h

@@ -227,7 +227,9 @@
 #endif
 /* #undef STACK_DIRECTION */
 #define STDC_HEADERS 1
-#define TLS __thread
+#ifdef HAVE__THREAD_LOCAL
+# define TLS _Thread_local
+#endif
 #define USE_POSIX_THREADS 1
 /* #undef USE_POSIX_THREADS_WEAK */
 /* #undef USE_PTH_THREADS */

pkg/e2fsprogs/gen.lua

@@ -10,9 +10,10 @@ cflags{
 }
 
 build('cat', '$outdir/config.h', {
-	'$dir/config.h',
+	'$builddir/probe/HAVE__THREAD_LOCAL',
 	'$builddir/probe/SIZEOF_LONG',
 	'$builddir/probe/SIZEOF_TIME_T',
+	'$dir/config.h',
 })
 
 set('subst', {

pkg/util-linux/config.h

@@ -200,7 +200,9 @@
 #define HAVE_TERM_H 1
 #define HAVE_TIMEGM 1
 #define HAVE_TIMER_CREATE 1
-#define HAVE_TLS 1
+#ifdef HAVE__THREAD_LOCAL
+# define HAVE_TLS 1
+#endif
 #define HAVE_TM_GMTOFF 1
 #define HAVE_TM_ZONE 1
 /* #undef HAVE_TZNAME */

pkg/util-linux/gen.lua

@@ -1,12 +1,16 @@
 set('version', '2.34.0')
 cflags{
 	'-include $dir/config.h',
-	'-I $dir',
 	'-I $outdir',
 	'-I $srcdir/include',
 	'-I $srcdir/libuuid/src',
 }
 
+build('cat', '$outdir/config.h', {
+	'$builddir/probe/HAVE__THREAD_LOCAL',
+	'$dir/config.h',
+})
+
 build('sed', '$outdir/libsmartcols.h', '$srcdir/libsmartcols/src/libsmartcols.h.in', {
 	expr='s,@LIBSMARTCOLS_VERSION@,$version,',
 })
@@ -21,6 +25,7 @@ build('sed', '$outdir/libfdisk.h', '$srcdir/libfdisk/src/libfdisk.h.in', {
 
 pkg.hdrs = copy('$outdir/include/uuid', '$srcdir/libuuid/src', {'uuid.h'})
 pkg.deps = {
+	'$outdir/config.h',
 	'$outdir/libsmartcols.h',
 	'$outdir/libfdisk.h',
 }

probe/HAVE__THREAD_LOCAL

@@ -0,0 +1,4 @@
+_Thread_local int x;
+int main(void) {
+	return x;
+}

probe/gen.lua

@@ -4,6 +4,7 @@ end
 
 probe('HAVE_IMMINTRIN_H')
 probe('HAVE__MM_MOVEMASK_EPI8')
+probe('HAVE__THREAD_LOCAL')
 
 local function probesize(var)
 	build('probesize', '$outdir/'..var, {'$dir/'..var, '|', 'scripts/probe-size.sh'}, {var=var})