lit support for REQUIRES: asserts.

Take #2. Don't piggyback on the existing config.build_mode. Instead,
define a new lit feature for each build feature we need (currently
just "asserts"). Teach both autoconf'd and cmake'd Makefiles to define
this feature within test/lit.site.cfg. This doesn't require any lit
harness changes and should be more robust across build systems.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@133665 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Makefile b/test/Makefile
index e5d538b..4fdafe1 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -42,7 +42,6 @@
 	@$(ECHOPATH) s=@LLVM_BINARY_DIR@=$(LLVM_OBJ_ROOT)=g >> lit.tmp
 	@$(ECHOPATH) s=@LLVM_TOOLS_DIR@=$(ToolDir)=g >> lit.tmp
 	@$(ECHOPATH) s=@LLVM_LIBS_DIR@=$(LibDir)=g >> lit.tmp
-	@$(ECHOPATH) s=@LLVM_BUILD_MODE@=$(BuildMode)=g >> lit.tmp
 	@$(ECHOPATH) s=@CLANG_SOURCE_DIR@=$(PROJ_SRC_DIR)/..=g >> lit.tmp
 	@$(ECHOPATH) s=@CLANG_BINARY_DIR@=$(PROJ_OBJ_DIR)/..=g >> lit.tmp
 	@$(ECHOPATH) s=@TARGET_TRIPLE@=$(TARGET_TRIPLE)=g >> lit.tmp
diff --git a/test/lit.site.cfg.in b/test/lit.site.cfg.in
index 9943ba3..df90b81 100644
--- a/test/lit.site.cfg.in
+++ b/test/lit.site.cfg.in
@@ -5,7 +5,6 @@
 config.llvm_tools_dir = "@LLVM_TOOLS_DIR@"
 config.llvm_libs_dir = "@LLVM_LIBS_DIR@"
 config.lit_tools_dir = "@LLVM_LIT_TOOLS_DIR@"
-config.llvm_build_modes = "@LLVM_BUILD_MODE@".split('+')
 config.clang_obj_root = "@CLANG_BINARY_DIR@"
 config.target_triple = "@TARGET_TRIPLE@"