From f4cd7abdd38aa3d14dcce98cb92dc1054fe97503 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Tue, 9 Mar 2021 12:58:34 +0200
Subject: Add support for compressing/decompressing fdstreams with LZ4

Importing LZ4 code from version 1.9.3.
---
 libbutl/buildfile | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

(limited to 'libbutl/buildfile')

diff --git a/libbutl/buildfile b/libbutl/buildfile
index 6526900..5398f71 100644
--- a/libbutl/buildfile
+++ b/libbutl/buildfile
@@ -27,9 +27,8 @@ windows = ($tclass == 'windows')
 #
 lib{butl}: {hxx ixx cxx}{win32-utility}: include = $windows
 
-# Our C-files are included into sha256.cxx (sha256c.c) and timestamp.cxx
-# (strptime.c timelocal.h timelocal.c), so treat them as files exclude from
-# the compilation.
+# Our C-files are always included into C++-files that wrap the corresponding
+# API so treat them as files exclude from the compilation.
 #
 lib{butl}: file{*.c *.h}
 
@@ -40,6 +39,12 @@ lib{butl}: cxx{uuid-macos}:   include = ($tclass == 'macos')
 lib{butl}: cxx{uuid-windows}: include = $windows
 lib{butl}: cxx{uuid-freebsd}: include = ($tsys == 'freebsd' || $tsys == 'netbsd')
 
+# GCC prior to version 6 has flaky `#pragma GCC diagnostic` so we have to
+# disable certain warnings outright.
+#
+if ($cxx.id == 'gcc' && $cxx.version.major < 6)
+  cc.coptions += -Wno-unused-function
+
 # Additional system libraries.
 #
 switch $tclass, $tsys
-- 
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