[Bf-blender-cvs] [8efe90f] blender-v2.77-release: CMAKE / msvc openmp, delay loading of openmp dll so we can set environment variable before it is loaded

[Martijn Berger]

Commit: 8efe90f0a01fa3fcae68c02952aefb9c15c7c0d0
Author: Martijn Berger
Date:   Thu Mar 31 13:45:33 2016 +0200
Branches: blender-v2.77-release
https://developer.blender.org/rB8efe90f0a01fa3fcae68c02952aefb9c15c7c0d0

CMAKE / msvc openmp, delay loading of openmp dll so we can set environment
variable before it is loaded

===================================================================

M	CMakeLists.txt
M	source/creator/creator.c

===================================================================

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9028f94..198995a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1292,6 +1292,17 @@ elseif(WIN32)
 
 		set(PLATFORM_LINKFLAGS_DEBUG "/IGNORE:4099 /NODEFAULTLIB:libcmt.lib /NODEFAULTLIB:libc.lib")
 
+		# Use dynamic loading for OpenMP
+		if(WITH_OPENMP)
+			if(MSVC_VERSION EQUAL 1800)
+				set(OPENMP_DLL_NAME "vcomp120")
+			else()
+				set(OPENMP_DLL_NAME "vcomp140")
+			endif()
+			set(PLATFORM_LINKFLAGS "${PLATFORM_LINKFLAGS} /DELAYLOAD:${OPENMP_DLL_NAME}.dll delayimp.lib")
+			set(PLATFORM_LINKFLAGS_DEBUG "${PLATFORM_LINKFLAGS_DEBUG} /DELAYLOAD::${OPENMP_DLL_NAME}d.dll delayimp.lib")
+		endif()
+
 		if(NOT DEFINED LIBDIR)
 
 			# Setup 64bit and 64bit windows systems
diff --git a/source/creator/creator.c b/source/creator/creator.c
index b2bfe7f..bf8347d 100644
--- a/source/creator/creator.c
+++ b/source/creator/creator.c
@@ -1816,6 +1816,11 @@ int main(
 
 
 #ifdef WIN32
+	/* We delay loading of openmp so we can set the policy here. */
+# if defined(_MSC_VER)
+	_putenv_s("OMP_WAIT_POLICY", "PASSIVE");
+# endif
+
 	/* FMA3 support in the 2013 CRT is broken on Vista and Windows 7 RTM (fixed in SP1). Just disable it. */
 #  if defined(_MSC_VER) && defined(_M_X64)
 	_set_FMA3_enable(0);