From 64786ec12a6e648bf64d2e7e76772cf0d2029487 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@musicpd.org>
Date: Tue, 16 May 2017 07:20:47 +0200
Subject: [PATCH] Main: omit "constexpr" on MIN_BUFFER_SIZE with GCC 4.x

---
 NEWS         |  1 +
 src/Main.cxx | 12 ++++++++++--
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/NEWS b/NEWS
index c4aefd52d..f3bc7a04f 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,7 @@
 ver 0.20.8 (not yet released)
 * output
   - osx: fix build failure due to missing "noexcept"
+* fix build failure with GCC 4.x
 
 ver 0.20.7 (2017/05/15)
 * database
diff --git a/src/Main.cxx b/src/Main.cxx
index a431aa4ec..e05afe633 100644
--- a/src/Main.cxx
+++ b/src/Main.cxx
@@ -121,8 +121,16 @@ static constexpr size_t KILOBYTE = 1024;
 static constexpr size_t MEGABYTE = 1024 * KILOBYTE;
 
 static constexpr size_t DEFAULT_BUFFER_SIZE = 4 * MEGABYTE;
-static constexpr size_t MIN_BUFFER_SIZE = std::max(CHUNK_SIZE * 32,
-						   64 * KILOBYTE);
+
+static
+#if GCC_OLDER_THAN(5,0)
+/* gcc 4.x has no "constexpr" for std::max() */
+const
+#else
+constexpr
+#endif
+size_t MIN_BUFFER_SIZE = std::max(CHUNK_SIZE * 32,
+				  64 * KILOBYTE);
 
 static constexpr unsigned DEFAULT_BUFFER_BEFORE_PLAY = 10;