[boost] [Boost.Thread] Patch for Intel on Darwin

Subject: [boost] [Boost.Thread] Patch for Intel on Darwin
From: Belcourt, Kenneth (kbelco_at_[hidden])
Date: 2010-05-14 15:33:25

Hi,

The thread library is failing to build with Intel on Darwin with this  
error.

     "/opt/intel/Compiler/11.1/067/bin/intel64/icpc" -xc++ -w1 -O0 -g - 
inline-level=0 -vec-report0 -DBOOST_ALL_NO_LIB=1 - 
DBOOST_THREAD_BUILD_DLL=1 -DBOOST_THREAD_POSIX -I".." -c -o "/Volumes/ 
Scratch/kbelco/boost/results/boost/bin.v2/libs/thread/build/intel- 
darwin-11.1/debug/threading-multi/pthread/thread.o" "../libs/thread/ 
src/pthread/thread.cpp"

../libs/thread/src/pthread/thread.cpp(385): error: identifier  
"get_nprocs" is undefined
           return get_nprocs();
                       ^

The fix is to test for Apple and Intel before the GNU test.

Index: libs/thread/src/pthread/thread.cpp
===================================================================
--- libs/thread/src/pthread/thread.cpp	(revision 61969)
+++ libs/thread/src/pthread/thread.cpp	(working copy)
@@ -381,6 +381,10 @@
      {
  #if defined(PTW32_VERSION) || defined(__hpux)
          return pthread_num_processors_np();
+#elif defined(__APPLE__) && defined (__INTEL_COMPILER)
+        int count;
+        size_t size=sizeof(count);
+        return sysctlbyname("hw.ncpu",&count,&size,NULL,0)?0:count;
  #elif defined(_GNU_SOURCE)
          return get_nprocs();
  #elif defined(__APPLE__) || defined(__FreeBSD__)

This has been tested on Darwin and Linux.  Okay to commit?

-- Noel