[patch] v2-0002-scripts-gen_symbol_header.awk-undefine-libc-symbo.patch

v2-0002-scripts-gen_symbol_header.awk-undefine-libc-symbo.patch (text/plain), 1.18 KB, created by Sergei Trofimovich (RETIRED) on 2019-06-24 21:00:54 UTC

From 4a2b2ee1c14bfe05abe58cf5d414e527191b50fe Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <[e-mail]>
Date: Sun, 23 Jun 2019 21:50:54 +0100
Subject: [PATCH v2 2/2] scripts/gen_symbol_header.awk: undefine libc symbol
 aliases

Avoid libc's symbol rename via #define. musl defines aliases as:
   #define mkstemp64 mkstemp
   #define mkstemps64 mkstemps

This causes libsandbox's aliases to clash with one another,
like mkstemp and mkstemp64.

The change does not break glibc and restores musl support.

Signed-off-by: Sergei Trofimovich <[e-mail]>
---
 scripts/gen_symbol_header.awk | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/scripts/gen_symbol_header.awk b/scripts/gen_symbol_header.awk
index c9af7f9..3f23134 100644
--- a/scripts/gen_symbol_header.awk
+++ b/scripts/gen_symbol_header.awk
@@ -117,6 +117,10 @@ END {
 				gsub(/@|\./, "_", sym_real_name);
 			}
 
+			# Avoid libc's symbol rename via #define. musl defines aliases as:
+			# #define mkstemp64 mkstemp
+			# #define mkstemps64 mkstemps
+			printf("#undef %s\n", sym_index);
 			printf("#define symname_%s \"%s\"\n", sym_real_name, sym_index);
 
 			# We handle non-versioned libc's by setting symver_*
-- 
2.22.0