[Boost-commit] svn:boost r41532 - trunk/tools/build/v2/tools

From: ghost_at_[hidden]
Date: 2007-12-01 09:56:23

Author: vladimir_prus
Date: 2007-12-01 09:56:23 EST (Sat, 01 Dec 2007)
New Revision: 41532
URL: http://svn.boost.org/trac/boost/changeset/41532

Log:
Change the detection of 64-bit windows to handle EM64T processors.

Text files modified: 
   trunk/tools/build/v2/tools/msvc.jam |    10 +++++++++-                              
   1 files changed, 9 insertions(+), 1 deletions(-)

Modified: trunk/tools/build/v2/tools/msvc.jam
==============================================================================
--- trunk/tools/build/v2/tools/msvc.jam	(original)
+++ trunk/tools/build/v2/tools/msvc.jam	2007-12-01 09:56:23 EST (Sat, 01 Dec 2007)
@@ -310,8 +310,16 @@
                     # and x86_ia64 is right one.
                     setup-option = x86 x86_amd64 x86_ia64 ;
                     
-                    # Use a native x64 compiler if possible
+                    # When using 64-bit Windows, and targeting 64-bit,
+                    # it's possible to use native 64-bit compiler, which is
+                    # selected by the "amd64" parameter to vcvarsall.bat.
+                    # There are two variables we can use -- 
+                    # PROCESSOR_ARCHITECTURE and PROCESSOR_IDENTIFIER.
+                    # The first reflects processor proper, and the second is
+                    # empirically found to be always x86 when using 32-bit
+                    # windows.                    
                     if [ MATCH ^(AMD64) : [ os.environ PROCESSOR_IDENTIFIER ] ]
+                      || [ MATCH ^(EM64T) : [ os.environ PROCESSOR_IDENTIFIER ] ]
                     {
                         setup-option = x86 amd64 x86_ia64 ;
                     }