# DP: Turn on -Wl,-z,relro by default.

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

Index: b/src/gcc/doc/invoke.texi
===================================================================
--- a/src/gcc/doc/invoke.texi
+++ b/src/gcc/doc/invoke.texi
@@ -10049,6 +10049,9 @@
 linker.  When using the GNU linker, you can also get the same effect with
 @option{-Wl,-Map=output.map}.
 
+NOTE: In Ubuntu 8.10 and later versions, for LDFLAGS, the option
+@option{-Wl,-z,relro} 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/src/gcc/gcc.c
===================================================================
--- a/src/gcc/gcc.c
+++ b/src/gcc/gcc.c
@@ -741,6 +741,7 @@
    "%{flto|flto=*:%<fcompare-debug*} \
     %{flto} %{flto=*} %l " LINK_PIE_SPEC \
    "%{fuse-ld=*:-fuse-ld=%*}\
+   -z relro\
     %X %{o*} %{e*} %{N} %{n} %{r}\
     %{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}}\
     %{static:} %{L*} %(mfwrap) %(link_libgcc) " SANITIZER_EARLY_SPEC " %o\