From fd3469029f5679b7cd3cc235aa4781288ee7f0f8 Mon Sep 17 00:00:00 2001
From: Thomas Krijnen <t.krijnen@gmail.com>
Date: Fri, 2 Aug 2019 14:55:55 +0200
Subject: [PATCH] -pthread on unix

---
 cmake/CMakeLists.txt | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index 070f345e57..67a8c2c061 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -266,6 +266,10 @@ endif()
 # resolved. Also add thread and rt libraries.
 get_filename_component(libTKernelExt ${libTKernel} EXT)
 if("${libTKernelExt}" STREQUAL ".a")
+    set(OCCT_STATIC ON)
+endif()
+
+if(OCCT_STATIC)
     find_package(Threads)
     # OPENCASCADE_LIBRARIES repeated three times below in order to fix cyclic dependencies - use --start-group ... --end-group instead?
     set(OPENCASCADE_LIBRARIES ${OPENCASCADE_LIBRARIES} ${OPENCASCADE_LIBRARIES} ${OPENCASCADE_LIBRARIES} ${OPENCASCADE_LIBRARIES} ${OPENCASCADE_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
@@ -561,7 +565,12 @@ set(SCHEMA_AGNOSTIC_FILES ${SCHEMA_AGNOSTIC_H_FILES} ${SCHEMA_AGNOSTIC_CPP_FILES
 
 add_library(IfcGeom ${SCHEMA_AGNOSTIC_FILES})
 set_target_properties(IfcGeom PROPERTIES COMPILE_FLAGS -DIFC_GEOM_EXPORTS)
-TARGET_LINK_LIBRARIES(IfcGeom ${IFCGEOM_SCHEMA_LIBRARIES})
+
+if (UNIX)
+find_package(Threads)
+endif()
+
+TARGET_LINK_LIBRARIES(IfcGeom ${IFCGEOM_SCHEMA_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
 
 endif(BUILD_IFCGEOM)