aboutsummaryrefslogtreecommitdiffstats
path: root/main/gcc/0003-Turn-on-Wl-z-relro-z-now-by-default.patch
blob: ab9cc6d94f0a3d6cb5a04a30e62d3f4806fa505e (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
From 77e75a23e9bdf8863823225567c509b6fed49e6e Mon Sep 17 00:00:00 2001
From: Ariadne Conill <ariadne@dereferenced.org>
Date: Fri, 21 Aug 2020 06:45:49 +0000
Subject: [PATCH 03/39] 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 86e57038042..87ff404bc20 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -14645,6 +14645,9 @@ 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} \
-- 
2.28.0