From 52e2beb320d9323f95373719dba26b15424b299b Mon Sep 17 00:00:00 2001
From: Bill Somerville <g4wjs@classdesign.com>
Date: Tue, 10 Feb 2015 14:04:38 +0000
Subject: [PATCH] Adjust CMake script for OpenMP on Mac

The native Mac C/C++ compilers (Clang) do not support OpenMP so CMake by
default disables OpenMP for the project since it requires all project compilers
to support it. This means that we have to hack the build script on Mac to
compile the Fortran sources with OpenMP turned on and manually link in the
required OpenMP run time support to the executables.

This hack presumes that the Fortran compiler on Mac is gfortran.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@4947 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
---
 CMakeLists.txt | 54 +++++++++++++++++++++++++++++++++-----------------
 1 file changed, 36 insertions(+), 18 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8b4434ec0..86f748212 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -710,16 +710,24 @@ endif (WIN32)
 #
 
 # build a library of package functionality (without and optionally with OpenMP support)
-add_library (wsjt STATIC ${wsjt_CSRCS} ${wsjt_CXXSRCS} ${wsjt_FSRCS})
-if (${OPENMP_FOUND})
-  add_library (wsjt_omp STATIC ${wsjt_CSRCS} ${wsjt_CXXSRCS} ${wsjt_FSRCS})
-  file (MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/fortran_modules_omp)
-  set_target_properties (wsjt_omp
+add_library (wsjt_cxx STATIC ${wsjt_CSRCS} ${wsjt_CXXSRCS})
+add_library (wsjt_fort STATIC ${wsjt_FSRCS})
+if (${OPENMP_FOUND} OR APPLE)
+  add_library (wsjt_fort_omp STATIC ${wsjt_FSRCS})
+  set_target_properties (wsjt_fort_omp
     PROPERTIES
     COMPILE_FLAGS "${OpenMP_C_FLAGS}"
     Fortran_MODULE_DIRECTORY ${CMAKE_BINARY_DIR}/fortran_modules_omp
     )
-endif (${OPENMP_FOUND})
+  file (MAKE_DIRECTORY ${CMAKE_BINARY_DIR}/fortran_modules_omp)
+  if (APPLE)
+    # nasty hack to use OpenMP only on Fortran files - assumes gfortran being used
+    set_target_properties (wsjt_fort_omp
+      PROPERTIES
+      COMPILE_FLAGS "-fopenmp"
+      )
+  endif (APPLE)
+endif (${OPENMP_FOUND} OR APPLE)
 
 # build a library of package Qt functionality
 add_library (wsjt_qt STATIC ${wsjt_qt_CXXSRCS} ${wsjt_qt_GENUISRCS} ${GENAXSRCS})
@@ -729,29 +737,39 @@ if (WIN32)
 endif (WIN32)
 
 add_executable (jt9sim lib/jt9sim.f90 wsjtx.rc)
-target_link_libraries (jt9sim wsjt)
+target_link_libraries (jt9sim wsjt_fort wsjt_cxx)
 
 add_executable (jt65code lib/jt65code.f90 wsjtx.rc)
-target_link_libraries (jt65code wsjt)
+target_link_libraries (jt65code wsjt_fort wsjt_cxx)
 
 add_executable (jt9code lib/jt9code.f90 wsjtx.rc)
-target_link_libraries (jt9code wsjt)
+target_link_libraries (jt9code wsjt_fort wsjt_cxx)
 
 add_executable (jt9 lib/jt9.f90 lib/jt9a.f90 lib/jt9b.f90 lib/jt9c.f90 ${jt9_CXXSRCS} wsjtx.rc)
-target_link_libraries (jt9 wsjt ${FFTW3_LIBRARIES})
+target_link_libraries (jt9 wsjt_fort wsjt_cxx ${FFTW3_LIBRARIES})
 qt5_use_modules (jt9 Core)
 
-if (${OPENMP_FOUND})
+if (${OPENMP_FOUND} OR APPLE)
   add_executable (jt9_omp lib/jt9.f90 lib/jt9a.f90 lib/jt9b.f90 lib/jt9c.f90 ${jt9_CXXSRCS} wsjtx.rc)
+  if (APPLE)
+    set_target_properties (jt9_omp
+      PROPERTIES
+      COMPILE_FLAGS "-fopenmp"
+      LINK_LIBRARIES "gomp;gcc_s.1"
+      )
+  else (APPLE)
+    set_target_properties (jt9_omp
+      PROPERTIES
+      COMPILE_FLAGS "${OpenMP_C_FLAGS}"
+      )
+  endif (APPLE)
   set_target_properties (jt9_omp
     PROPERTIES
-    COMPILE_FLAGS "${OpenMP_C_FLAGS}"
     Fortran_MODULE_DIRECTORY ${CMAKE_BINARY_DIR}/fortran_modules_omp
-    LINK_FLAGS "${OpenMP_C_FLAGS} ${_extra_omp_link_flags}"
     )
-  target_link_libraries (jt9_omp wsjt_omp ${FFTW3_LIBRARIES})
+  target_link_libraries (jt9_omp wsjt_fort_omp wsjt_cxx ${FFTW3_LIBRARIES})
   qt5_use_modules (jt9_omp Core)
-endif (${OPENMP_FOUND})
+endif (${OPENMP_FOUND} OR APPLE)
 
 # build configuration dialog and transceiver interface test application
 #add_executable (ConfigTest ${ConfigTest_CXXSRCS} ${ConfigTest_GENUISRCS} wsjtx.rc)
@@ -812,7 +830,7 @@ set_target_properties (wsjtx PROPERTIES
   MACOSX_BUNDLE_GUI_IDENTIFIER "org.k1jt.wsjtx"
   )
 
-target_link_libraries (wsjtx wsjt wsjt_qt ${hamlib_LIBRARIES} ${FFTW3_LIBRARIES})
+target_link_libraries (wsjtx wsjt_fort wsjt_cxx wsjt_qt ${hamlib_LIBRARIES} ${FFTW3_LIBRARIES})
 
 #
 # installation
@@ -827,12 +845,12 @@ install (TARGETS jt9 jt65code jt9code
   BUNDLE DESTINATION ${WSJT_BIN_DESTINATION} COMPONENT runtime
   )
 
-if (${OPENMP_FOUND})
+if (${OPENMP_FOUND} OR APPLE)
   install (TARGETS jt9_omp
     RUNTIME DESTINATION ${WSJT_BIN_DESTINATION} COMPONENT runtime
     BUNDLE DESTINATION ${WSJT_BIN_DESTINATION} COMPONENT runtime
     )
-endif (${OPENMP_FOUND})
+endif (${OPENMP_FOUND} OR APPLE)
 
 if (WSJT_INCLUDE_KVASD)
   install (PROGRAMS