From 0a0f66e4af5526771ba714077758f66c0cfd001d Mon Sep 17 00:00:00 2001
From: Piotr Kubaj <pkubaj@FreeBSD.org>
Date: Tue, 14 Mar 2023 19:03:55 +0000
Subject: [PATCH] graphics/perceptualdiff: fix build without libomp

CMake Error at /usr/local/share/cmake/Modules/FindOpenMP.cmake:261 (try_compile):
  Failed to generate test project build system.
Call Stack (most recent call first):
  /usr/local/share/cmake/Modules/FindOpenMP.cmake:537 (_OPENMP_GET_FLAGS)
  CMakeLists.txt:25 (find_package)
This warning is for project developers.  Use -Wno-dev to suppress it.
---
 graphics/perceptualdiff/Makefile | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/graphics/perceptualdiff/Makefile b/graphics/perceptualdiff/Makefile
index df3bfab968a7..59b2c744af1d 100644
--- a/graphics/perceptualdiff/Makefile
+++ b/graphics/perceptualdiff/Makefile
@@ -17,6 +17,11 @@ PLIST_FILES=	bin/perceptualdiff
 USE_GITHUB=	yes
 GH_ACCOUNT=	myint
 
-USES=		cmake compiler:c++0x
+USES=		cmake
+.if !exists(/usr/include/omp.h)
+USES+=		compiler:gcc-c++11-lib
+.else
+USES+=		compiler:c++0x
+.endif
 
 .include <bsd.port.mk>