For PR797:

1. Actually turn on -fno-exceptions in libraries that do not have the
   REQUIRES_EH option in their Makefile. The following library file size
   savings were made (DEBUG):
      libLLVMDataStructure.a  525K
      libLLVMCore.a           380K
      libLLVMCodeGen.a        350K
      libLLVMTransformUtils.a 305K
      libLLVMScalarOpts.a     270K
      libLLVMAnalysis.a       247K
      libLLVMSelectionDAG.a   233K
      libLLVMipo.a            175K
      LLVMX86.o               123K
      LLVMPPC.o                81K
      libLLVMipa.a             17K
                 TOTAL      2,706K
      Note that the savings is actually a little larger than this because
      I didn't count any of the libraries that had small changes.

2. Remove REQUIRES_EH from the AsmParser library as it is now exception
   free. This resulted in a nearly 78K drop in the size of the debug
   library for AsmParser.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29767 91177308-0d34-0410-b5e6-96231b3b80d8

Makefile.rules

@@ -249,6 +249,11 @@ else
   C.Flags   += -D_DEBUG
 endif
 
+# IF REQUIRES_EH=1 is specified then don't disable exceptions
+ifndef REQUIRES_EH
+  CXX.Flags += -fno-exceptions
+endif
+
 CXX.Flags     += $(CXXFLAGS)
 C.Flags       += $(CFLAGS)
 CPP.BaseFlags += $(CPPFLAGS)

lib/AsmParser/Makefile

@@ -10,7 +10,6 @@
 LEVEL = ../..
 LIBRARYNAME := LLVMAsmParser
 BUILD_ARCHIVE = 1
-REQUIRES_EH := 1
 EXTRA_DIST := Lexer.cpp.cvs Lexer.l.cvs \
               llvmAsmParser.cpp.cvs llvmAsmParser.h.cvs llvmAsmParser.y.cvs