Add OpenMP debug information to conf screen (#869)

* Add OpenMP debug information to conf screen

* Revert casing and whitespace in CMakeLists.txt

* Remove unnecessary comment src/CMakeLists.txt

CMakeLists.txt

@@ -116,7 +116,6 @@ endif()
 
 if(ENABLE_OPENMP)
     find_package( OpenMP REQUIRED )
-    include(FindOpenMP)
     if(OPENMP_FOUND)
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
         message(STATUS "found OpenMP, compiling with flags: " ${OpenMP_CXX_FLAGS} )

src/CMakeLists.txt

@@ -80,7 +80,8 @@ include_directories(
     ${PNG_PNG_INCLUDE_DIR}
     ${FREETYPE_INCLUDE_DIRS}
     ${CAIRO_INCLUDE_DIRS}
-    ${MIMALLOC_INCLUDE_DIR})
+    ${MIMALLOC_INCLUDE_DIR}
+    ${OpenMP_CXX_INCLUDE_DIRS})
 
 if(Backtrace_FOUND)
     include_directories(

src/confscreen.cpp

@@ -5,6 +5,9 @@
 // Copyright 2008-2013 Jonathan Westhues.
 //-----------------------------------------------------------------------------
 #include "solvespace.h"
+#if defined(_OPENMP)
+#include <omp.h>
+#endif
 
 void TextWindow::ScreenChangeLightDirection(int link, uint32_t v) {
     SS.TW.ShowEditControl(8, ssprintf("%.2f, %.2f, %.2f", CO(SS.lightDir[v])));
@@ -389,6 +392,11 @@ void TextWindow::ShowConfiguration() {
         Printf(false, " %Ft   renderer %E%s", gl_renderer);
         Printf(false, " %Ft   version  %E%s", gl_version);
     }
+
+    #if defined(_OPENMP)
+        Printf(false, " %FtOpenMP enabled");
+        Printf(false, " %Ft   threads  %E%d", omp_get_max_threads());
+    #endif
 }
 
 bool TextWindow::EditControlDoneForConfiguration(const std::string &s) {