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path: root/community/gcc6/002_all_default-relro.patch
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# Turn on -Wl,-z,relro,-z,now by default.

---
 gcc/doc/invoke.texi |    3 +++
 gcc/gcc.c           |    1 +
 2 files changed, 4 insertions(+), 0 deletions(-)

Index: b/gcc/doc/invoke.texi
===================================================================
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -11424,6 +11424,9 @@ For example, @option{-Wl,-Map,output.map
 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
Index: b/gcc/gcc.c
===================================================================
--- a/gcc/gcc.c
+++ b/gcc/gcc.c
@@ -890,6 +890,7 @@ proper position among the other output f
    "%{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:%{!nostartfiles:%S}} " VTABLE_VERIFICATION_SPEC " \
     %{static:} %{L*} %(mfwrap) %(link_libgcc) " SANITIZER_EARLY_SPEC " %o\