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https://gitlab.freedesktop.org/pipewire/pipewire/-/commit/240d21282271dce7d2eeff03185a61ffca0c12c5
https://gitlab.freedesktop.org/pipewire/pipewire/-/issues/2526
https://bugs.gentoo.org/857201
From 240d21282271dce7d2eeff03185a61ffca0c12c5 Mon Sep 17 00:00:00 2001
From: Pauli Virtanen <pav@iki.fi>
Date: Sun, 10 Jul 2022 16:05:27 +0300
Subject: [PATCH] pipewire-v4l2: disable _FORTIFY_SOURCE when defining override
functions
_FORTIFY_SOURCE defines always_inline versions of open etc. functions,
which conflict with our exported override versions. Disable it for the
file that defines the override functions.
--- a/pipewire-v4l2/src/v4l2-func.c
+++ b/pipewire-v4l2/src/v4l2-func.c
@@ -22,6 +22,16 @@
* DEALINGS IN THE SOFTWARE.
*/
+
+/*
+ * We need to export open* etc., but _FORTIFY_SOURCE defines conflicting
+ * always_inline versions. Disable _FORTIFY_SOURCE for this file, so we
+ * can define our overrides.
+ */
+#ifdef _FORTIFY_SOURCE
+#undef _FORTIFY_SOURCE
+#endif
+
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
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