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-rw-r--r--win32/setup.mak10
1 files changed, 10 insertions, 0 deletions
diff --git a/win32/setup.mak b/win32/setup.mak
index 0733e99bbb..0d9990ae8e 100644
--- a/win32/setup.mak
+++ b/win32/setup.mak
@@ -204,6 +204,16 @@ RUBY_SO_NAME = $(RUBY_SO_NAME)
$(ARCH) = x64
!elseif "$(PROCESSOR_ARCHITECTURE)" == "IA64"
$(ARCH) = ia64
+!elseif defined(PROCESSOR_ARCHITEW6432)
+$(BANG)if "$$(TARGET_OS)" == "mswin64"
+!if "$(PROCESSOR_ARCHITECTURE)" == "IA64"
+$(ARCH) = ia64
+!else
+$(ARCH) = x64
+!endif
+$(BANG)else
+$(ARCH) = $(PROCESSOR_ARCHITECTURE)
+$(BANG)endif
!else
$(ARCH) = $(PROCESSOR_ARCHITECTURE)
!endif