The attached patches attempt to fix cross builds. For example, if you
try to use i686-darwin to build for arm-eabi, you'll quickly run into
several false assumptions that the target OS must be the same as the
host OS. These patches split $(OS) into $(HOST_OS) and $(TARGET_OS) to
help builds like "make check" and the test-suite able to cross
compile. Along the way a target of *-unknown-eabi is defined as
"Freestanding" so that TARGET_OS checks have something to work with.

Patch by Sandeep Patel!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79296 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/lib/llvm2cpp.exp b/test/lib/llvm2cpp.exp
index d8a65ff..05d2651 100644
--- a/test/lib/llvm2cpp.exp
+++ b/test/lib/llvm2cpp.exp
@@ -73,7 +73,7 @@
     }
 
     set retval [ catch { 
-      exec -keepnewline gcc -g -D__STDC_LIMIT_MACROS -o $executable $generated -I$srcroot/include -I$objroot/include -L$llvmlibsdir -lLLVMCore -lLLVMSupport -lLLVMbzip2 -lLLVMSystem -lstdc++ } msg ] 
+      exec -keepnewline gcc -g -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -o $executable $generated -I$srcroot/include -I$objroot/include -L$llvmlibsdir -lLLVMCore -lLLVMSupport -lLLVMSystem -lstdc++ } msg ] 
     if { $retval != 0 } {
       fail "$test: gcc returned $retval\n$msg"
       continue