From 31afba6b4415db8ed4a18a5393a9f5b8bc356bfc Mon Sep 17 00:00:00 2001
From: Bernhard Manfred Gruber <bernhardmgruber@gmail.com>
Date: Mon, 31 Oct 2022 12:41:06 +0100
Subject: [PATCH] Define _USE_MATH_DEFINES for MSVC when alpaka is found

---
 CMakeLists.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d1f4d51c71..19446ef27c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -32,6 +32,11 @@ if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
 	set_property(CACHE CMAKE_BUILD_TYPE PROPERTY VALUE "Release")
 endif()
 
+if (MSVC)
+	# FIXME(bgruber): alpaka uses M_PI, so we need to make it available on MSVC. This may be fixed in alpaka 1.0.0.
+	target_compile_definitions(llama INTERFACE _USE_MATH_DEFINES)
+endif()
+
 # tests
 option(BUILD_TESTING "" OFF)
 include(CTest)