From: Dongsheng Song <dongsheng.song@gmail.com>
Date: Tue, 14 Feb 2023 11:51:29 +0000 (+0100)
Subject: Fix musl build on Linux
X-Git-Tag: basepoints/gcc-14~1223
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a16fc9333f1762d9b5a9da7239fe6a5cc9a6d190;p=thirdparty%2Fgcc.git

Fix musl build on Linux

The commit "ada: Add PIE support to backtraces on Linux" uses
_r_debug under Linux unconditionally. It is incorrect since musl
libc does not define _r_debug like glibc.

gcc/ada/
	* adaint.c [Linux]: Include <features.h>.
	(__gnat_get_executable_load_address) [Linux]: Enable only for
	glibc and uClibc.
---

diff --git a/gcc/ada/adaint.c b/gcc/ada/adaint.c
index 1c23d15846b1..8522094164e0 100644
--- a/gcc/ada/adaint.c
+++ b/gcc/ada/adaint.c
@@ -3526,6 +3526,7 @@ __gnat_cpu_set (int cpu, size_t count ATTRIBUTE_UNUSED, cpu_set_t *set)
 #if defined (__APPLE__)
 #include <mach-o/dyld.h>
 #elif defined (__linux__)
+#include <features.h>
 #include <link.h>
 #endif
 
@@ -3535,7 +3536,7 @@ __gnat_get_executable_load_address (void)
 #if defined (__APPLE__)
   return _dyld_get_image_header (0);
 
-#elif defined (__linux__)
+#elif defined (__linux__) && (defined (__GLIBC__) || defined (__UCLIBC__))
   struct link_map *map = _r_debug.r_map;
   return (const void *)map->l_addr;