libcamera: base: Wrap <regex.h>

Provide a wrapper for regex.h to work around the false-positive
compilation errors that crop up in some versions of gcc.

Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Daniel Scally <dan.scally@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Stefan Klug <stefan.klug@ideasonboard.com>
Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>

include/libcamera/base/meson.build

@@ -24,6 +24,7 @@ libcamera_base_private_headers = files([
     'message.h',
     'mutex.h',
     'private.h',
+    'regex.h',
     'semaphore.h',
     'thread.h',
     'thread_annotations.h',

include/libcamera/base/regex.h

@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2025, Ideas on Board Oy
+ *
+ * std::regex wrapper for gcc
+ */
+
+#pragma GCC diagnostic push
+#if defined __SANITIZE_ADDRESS__ && defined __OPTIMIZE__
+#pragma GCC diagnostic ignored "-Wmaybe-uninitialized"
+#endif
+#include <regex>
+#pragma GCC diagnostic pop