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From a35a55940c3402f8ebb510ec7d8bc67e85051277 Mon Sep 17 00:00:00 2001
From: Ariadne Conill <ariadne@dereferenced.org>
Date: Fri, 21 Aug 2020 06:45:49 +0000
Subject: [PATCH 03/30] Turn on -Wl,-z,relro,-z,now by default.
---
gcc/doc/invoke.texi | 3 +++
gcc/gcc.c | 1 +
2 files changed, 4 insertions(+)
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index dfed8fd25a8..ca56d52cb05 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -14638,6 +14638,9 @@ For example, @option{-Wl,-Map,output.map} passes @option{-Map output.map} to the
linker. When using the GNU linker, you can also get the same effect with
@option{-Wl,-Map=output.map}.
+NOTE: In Alpine Linux, for LDFLAGS, the option
+@option{-Wl,-z,relro,now} is used. To disable, use @option{-Wl,-z,norelro}.
+
@item -u @var{symbol}
@opindex u
Pretend the symbol @var{symbol} is undefined, to force linking of
diff --git a/gcc/gcc.c b/gcc/gcc.c
index b2200c5185a..625c9ab7902 100644
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -1039,6 +1039,7 @@ proper position among the other output files. */
"%{flto|flto=*:%<fcompare-debug*} \
%{flto} %{fno-lto} %{flto=*} %l " LINK_PIE_SPEC \
"%{fuse-ld=*:-fuse-ld=%*} " LINK_COMPRESS_DEBUG_SPEC \
+ "-z relro -z now " \
"%X %{o*} %{e*} %{N} %{n} %{r}\
%{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!r:%{!nostartfiles:%S}}} \
%{Wno-poison-system-directories:--no-poison-system-directories} \
--
2.27.0
|
