From 5c7bd853c8703f65904083778712ef625c3f3814 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Sun, 27 Mar 2016 20:31:50 -0700
Subject: [PATCH 56/57] Enable libc provide ssp and
 gcc_cv_target_dl_iterate_phdr for musl

        * configure.ac (gcc_cv_libc_provides_ssp): Add *-*-musl*.
        (gcc_cv_target_dl_iterate_phdr): Add *-linux-musl*.
        * configure: Regenerate.

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
Upstream-Status: Backport

 gcc/configure    | 7 +++++++
 gcc/configure.ac | 7 +++++++
 2 files changed, 14 insertions(+)

diff --git a/gcc/configure b/gcc/configure
index fcb05e7..81a449c 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -27814,6 +27814,9 @@ if test "${gcc_cv_libc_provides_ssp+set}" = set; then :
 else
   gcc_cv_libc_provides_ssp=no
     case "$target" in
+       *-*-musl*)
+        # All versions of musl provide stack protector
+        gcc_cv_libc_provides_ssp=yes;;
        *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
       # glibc 2.4 and later provides __stack_chk_fail and
       # either __stack_chk_guard, or TLS access to stack guard canary.
@@ -27846,6 +27849,7 @@ fi
 	 # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
 	 # simply assert that glibc does provide this, which is true for all
 	 # realistically usable GNU/Hurd configurations.
+	 # All supported versions of musl provide it as well
 	 gcc_cv_libc_provides_ssp=yes;;
        *-*-darwin* | *-*-freebsd*)
 	 ac_fn_c_check_func "$LINENO" "__stack_chk_fail" "ac_cv_func___stack_chk_fail"
@@ -27942,6 +27946,9 @@ case "$target" in
       gcc_cv_target_dl_iterate_phdr=no
     fi
     ;;
+  *-linux-musl*)
+    gcc_cv_target_dl_iterate_phdr=yes
+    ;;
 esac
 
 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
diff --git a/gcc/configure.ac b/gcc/configure.ac
index 923bc9a..b08e3dc 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -5291,6 +5291,9 @@ AC_CACHE_CHECK(__stack_chk_fail in target C library,
       gcc_cv_libc_provides_ssp,
       [gcc_cv_libc_provides_ssp=no
     case "$target" in
+       *-*-musl*)
+        # All versions of musl provide stack protector
+        gcc_cv_libc_provides_ssp=yes;;
        *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
       # glibc 2.4 and later provides __stack_chk_fail and
       # either __stack_chk_guard, or TLS access to stack guard canary.
@@ -5317,6 +5320,7 @@ AC_CACHE_CHECK(__stack_chk_fail in target C library,
 	 # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
 	 # simply assert that glibc does provide this, which is true for all
 	 # realistically usable GNU/Hurd configurations.
+	 # All supported versions of musl provide it as well
 	 gcc_cv_libc_provides_ssp=yes;;
        *-*-darwin* | *-*-freebsd*)
 	 AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
@@ -5390,6 +5394,9 @@ case "$target" in
       gcc_cv_target_dl_iterate_phdr=no
     fi
     ;;
+  *-linux-musl*)
+    gcc_cv_target_dl_iterate_phdr=yes
+    ;;
 esac
 GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
 if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
-- 
2.7.4