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[PATCH 5/7] configure: Unnest detection of -z,relro and -z,now


From: Richard Henderson
Subject: [PATCH 5/7] configure: Unnest detection of -z,relro and -z,now
Date: Tue, 17 Dec 2019 17:19:18 -1000

There is nothing about these options that is related to PIE.
Nor is there anything that specifically ties them to each other.
Use them unconditionally.

Signed-off-by: Richard Henderson <address@hidden>
---
 configure | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/configure b/configure
index 972ce7396f..f8981eec15 100755
--- a/configure
+++ b/configure
@@ -2034,9 +2034,6 @@ if test "$pie" != "no" ; then
     QEMU_CFLAGS="-fPIE -DPIE $QEMU_CFLAGS"
     LDFLAGS="-pie $LDFLAGS"
     pie="yes"
-    if compile_prog "" "-Wl,-z,relro -Wl,-z,now" ; then
-      LDFLAGS="-Wl,-z,relro -Wl,-z,now $LDFLAGS"
-    fi
   else
     if test "$pie" = "yes"; then
       error_exit "PIE not available due to missing toolchain support"
@@ -2047,6 +2044,16 @@ if test "$pie" != "no" ; then
   fi
 fi
 
+# Detect support for DT_BIND_NOW.
+if compile_prog "" "-Wl,-z,now" ; then
+  LDFLAGS="-Wl,-z,now $LDFLAGS"
+fi
+
+# Detect support for PT_GNU_RELRO.
+if compile_prog "" "-Wl,-z,relro" ; then
+  LDFLAGS="-Wl,-z,relro $LDFLAGS"
+fi
+
 ##########################################
 # __sync_fetch_and_and requires at least -march=i486. Many toolchains
 # use i686 as default anyway, but for those that don't, an explicit
-- 
2.20.1




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