From 76052545d2907913a643aab5cab0c9db1d74e393 Mon Sep 17 00:00:00 2001
From: Eric Botcazou <ebotcazou@adacore.com>
Date: Sat, 3 Jun 2017 08:23:22 +0000
Subject: [PATCH] configure.ac (*-*-linux-android*): Set target_makefile_frag.

	* configure.ac (*-*-linux-android*): Set target_makefile_frag.
	* configure: Regenerate.
config/
	* mt-android: New file.
libstdc++-v3/
	* src/filesystem/dir.cc (fs::_Dir::advance): Use std::exchange.

From-SVN: r248853
---
 ChangeLog                          | 5 +++++
 config/ChangeLog                   | 4 ++++
 config/mt-android                  | 1 +
 configure                          | 3 +++
 configure.ac                       | 3 +++
 libstdc++-v3/ChangeLog             | 4 ++++
 libstdc++-v3/src/filesystem/dir.cc | 3 ++-
 7 files changed, 22 insertions(+), 1 deletion(-)
 create mode 100644 config/mt-android

diff --git a/ChangeLog b/ChangeLog
index 775d72e7eb1..4794e5e3c52 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2017-06-03  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* configure.ac (*-*-linux-android*): Set target_makefile_frag.
+	* configure: Regenerate.
+
 2017-05-31  Martin Liska  <mliska@suse.cz>
 
 	* configure.ac: Add handling of stage2_werror_flags to
diff --git a/config/ChangeLog b/config/ChangeLog
index 020032b62fa..4d543535007 100644
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -1,3 +1,7 @@
+2017-06-03  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* mt-android: New file.
+
 2017-02-13  Richard Biener  <rguenther@suse.de>
 
 	* isl.m4: Remove support for ISL 0.14.
diff --git a/config/mt-android b/config/mt-android
new file mode 100644
index 00000000000..0db854f81d4
--- /dev/null
+++ b/config/mt-android
@@ -0,0 +1 @@
+CXXFLAGS_FOR_TARGET += -D_GNU_SOURCE -fexceptions -frtti
diff --git a/configure b/configure
index 2cbb4b7ab9d..084986f475e 100755
--- a/configure
+++ b/configure
@@ -6930,6 +6930,9 @@ case "${target}" in
   nios2-*-elf*)
     target_makefile_frag="config/mt-nios2-elf"
     ;;
+  *-*-linux-android*)
+    target_makefile_frag="config/mt-android"
+    ;;
   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
     target_makefile_frag="config/mt-gnu"
     ;;
diff --git a/configure.ac b/configure.ac
index 82faf06946d..0cf052b2c75 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2521,6 +2521,9 @@ case "${target}" in
   nios2-*-elf*)
     target_makefile_frag="config/mt-nios2-elf"
     ;;
+  *-*-linux-android*)
+    target_makefile_frag="config/mt-android"
+    ;;
   *-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
     target_makefile_frag="config/mt-gnu"
     ;;
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 4d9148437d5..1f8ac8a267e 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,7 @@
+2017-06-03  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* src/filesystem/dir.cc (fs::_Dir::advance): Use std::exchange.
+
 2017-06-02  Jonathan Wakely  <jwakely@redhat.com>
 
 	PR libstdc++/80624
diff --git a/libstdc++-v3/src/filesystem/dir.cc b/libstdc++-v3/src/filesystem/dir.cc
index c8457bde102..9aecd8042a5 100644
--- a/libstdc++-v3/src/filesystem/dir.cc
+++ b/libstdc++-v3/src/filesystem/dir.cc
@@ -146,7 +146,8 @@ fs::_Dir::advance(error_code* ec, directory_options options)
 
   int err = std::exchange(errno, 0);
   const auto entp = readdir(dirp);
-  std::swap(errno, err);
+  // std::swap cannot be used with Bionic's errno
+  err = std::exchange(errno, err);
 
   if (entp)
     {
-- 
2.30.2