From 403a4ef8e1c9101ace84097872f1840cfa731e03 Mon Sep 17 00:00:00 2001
From: Guillaume Pasero <guillaume.pasero@c-s.fr>
Date: Mon, 30 Apr 2018 12:47:47 +0200
Subject: [PATCH] BUG: #1574: fix detection of std::isnan in GEOS
---
SuperBuild/patches/GEOS/geos-2-isnan-all.diff | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
create mode 100644 SuperBuild/patches/GEOS/geos-2-isnan-all.diff
diff --git a/SuperBuild/patches/GEOS/geos-2-isnan-all.diff b/SuperBuild/patches/GEOS/geos-2-isnan-all.diff
new file mode 100644
index 0000000000..52c99bb4c5
--- /dev/null
+++ b/SuperBuild/patches/GEOS/geos-2-isnan-all.diff
@@ -0,0 +1,17 @@
+--- GEOS-orig/CMakeLists.txt 2018-04-30 12:38:44.089392211 +0200
++++ GEOS/CMakeLists.txt 2018-04-30 12:41:18.754980452 +0200
+@@ -189,7 +189,13 @@
+ include(CheckPrototypeExists)
+ include(CheckSymbolExists)
+
+-check_prototype_exists(isnan cmath HAVE_STD_ISNAN)
++CHECK_CXX_SOURCE_COMPILES("
++#include <cmath>
++int main()
++{
++ bool a = std::isnan(3.14);
++ return 0;
++}" HAVE_STD_ISNAN)
+ if(NOT HAVE_STD_ISNAN)
+ if(MSVC)
+ check_prototype_exists(_isnan float.h HAVE_ISNAN)
--
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