From f0fca253c24af2b8e9d12a1adf2ae2ee871377c3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Robert-Andr=C3=A9=20Mauchin?= <zebob.m@gmail.com>
Date: Tue, 26 Mar 2019 16:57:19 +0100
Subject: [PATCH] Work around ppc64le build failure with GNU C++ and -std=c++
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Signed-off-by: Robert-André Mauchin <zebob.m@gmail.com>
---
 CMakeLists.txt | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8a04883..60c51b4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -236,7 +236,11 @@ add_dependencies(w2xc gensrcs)
 
 if(CMAKE_COMPILER_IS_GNUCXX OR ${CMAKE_CXX_COMPILER_ID} MATCHES "^(Apple)?Clang$")
 	set(CMAKE_CXX_STANDARD 17)
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17")
+	if(CMAKE_COMPILER_IS_GNUCXX)
+		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++17")
+	else()
+		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++17")
+	endif()
 	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
 
 	if (${CMAKE_SYSTEM_NAME} STREQUAL "Darwin")
@@ -372,7 +376,7 @@ if(WIN32)
 else()
 	option(INSTALL_MODELS "Install waifu2x RGB models" true)
 endif()
-	
+
 if(INSTALL_MODELS)
 	add_definitions(-DDEFAULT_MODELS_DIRECTORY="${CMAKE_INSTALL_PREFIX}/share/waifu2x-converter-cpp")
 	install(DIRECTORY models_rgb/ DESTINATION share/waifu2x-converter-cpp)
-- 
2.20.1