From 355c62ce02d7d1a5fb7d28c829ee918df3983ad5 Mon Sep 17 00:00:00 2001
From: Edward Smith-Rowland <3dw4rd@verizon.net>
Date: Thu, 29 Nov 2018 15:17:17 +0000
Subject: [PATCH] Only include bits/stl_algo.h for C++20.

2018-11-29  Edward Smith-Rowland  <3dw4rd@verizon.net>

	Only include bits/stl_algo.h for C++20.
	* include/std/deque: Only include bits/stl_algo.h for C++20.
	* include/std/string: Ditto.
	* include/std/vector: Ditto.

From-SVN: r266624
---
 libstdc++-v3/ChangeLog          | 7 +++++++
 libstdc++-v3/include/std/deque  | 4 +++-
 libstdc++-v3/include/std/string | 4 +++-
 libstdc++-v3/include/std/vector | 4 +++-
 4 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 82a6e532f90..037325ea554 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,10 @@
+2018-11-29  Edward Smith-Rowland  <3dw4rd@verizon.net>
+
+	Only include bits/stl_algo.h for C++20.
+	* include/std/deque: Only include bits/stl_algo.h for C++20.
+	* include/std/string: Ditto.
+	* include/std/vector: Ditto.
+
 2018-11-29  Edward Smith-Rowland  <3dw4rd@verizon.net>
 
 	Fix erasure goofs.
diff --git a/libstdc++-v3/include/std/deque b/libstdc++-v3/include/std/deque
index 764e1f17948..25de200cefd 100644
--- a/libstdc++-v3/include/std/deque
+++ b/libstdc++-v3/include/std/deque
@@ -58,7 +58,9 @@
 #pragma GCC system_header
 
 #include <bits/stl_algobase.h>
-#include <bits/stl_algo.h> // For remove and remove_if
+#if __cplusplus > 201703L
+#  include <bits/stl_algo.h> // For remove and remove_if
+#endif // C++20
 #include <bits/allocator.h>
 #include <bits/stl_construct.h>
 #include <bits/stl_uninitialized.h>
diff --git a/libstdc++-v3/include/std/string b/libstdc++-v3/include/std/string
index 33cb5e6738c..87b31839fcf 100644
--- a/libstdc++-v3/include/std/string
+++ b/libstdc++-v3/include/std/string
@@ -48,7 +48,9 @@
 #include <bits/stl_function.h> // For less
 #include <ext/numeric_traits.h>
 #include <bits/stl_algobase.h>
-#include <bits/stl_algo.h> // For remove and remove_if
+#if __cplusplus > 201703L
+#  include <bits/stl_algo.h> // For remove and remove_if
+#endif // C++20
 #include <bits/range_access.h>
 #include <bits/basic_string.h>
 #include <bits/basic_string.tcc>
diff --git a/libstdc++-v3/include/std/vector b/libstdc++-v3/include/std/vector
index 720e0eb9cc3..ef04d759d53 100644
--- a/libstdc++-v3/include/std/vector
+++ b/libstdc++-v3/include/std/vector
@@ -58,7 +58,9 @@
 #pragma GCC system_header
 
 #include <bits/stl_algobase.h>
-#include <bits/stl_algo.h> // For remove and remove_if
+#if __cplusplus > 201703L
+#  include <bits/stl_algo.h> // For remove and remove_if
+#endif // C++20
 #include <bits/allocator.h>
 #include <bits/stl_construct.h>
 #include <bits/stl_uninitialized.h>