gentoo-overlay/app-containers/lxc/files/lxc-5.0.0-fix-strerror-r-char-p-musl.patch

https://github.com/lxc/lxc/commit/8ee8879083f40d2d0b9cef46d6a6907c1b5a814b

From 8ee8879083f40d2d0b9cef46d6a6907c1b5a814b Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Thu, 14 Jul 2022 12:31:21 +0200
Subject: [PATCH] src/lxc/log.h: fix STRERROR_R_CHAR_P

STRERROR_R_CHAR_P is always defined to 0 or 1 depending on the value of
have_func_strerror_r_char_p in meson.build so replace #ifdef by #if to
avoid a redefinition build failure if char *strerror_r is not defined

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
---
 src/lxc/log.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/lxc/log.h b/src/lxc/log.h
index 554a2e1d48..fcddc679a8 100644
--- a/src/lxc/log.h
+++ b/src/lxc/log.h
@@ -304,13 +304,13 @@ __lxc_unused static inline void LXC_##LEVEL(struct lxc_log_locinfo* locinfo,	\
  * Helper macro to define errno string.
  */
 #if HAVE_STRERROR_R
-	#ifdef STRERROR_R_CHAR_P
+	#if STRERROR_R_CHAR_P
 	char *strerror_r(int errnum, char *buf, size_t buflen);
 	#else
 	int strerror_r(int errnum, char *buf, size_t buflen);
 	#endif
 
-	#ifdef STRERROR_R_CHAR_P
+	#if STRERROR_R_CHAR_P
 		#define lxc_log_strerror_r                                               \
 			char errno_buf[PATH_MAX / 2] = {"Failed to get errno string"};   \
 			char *ptr = NULL;                                                \