[runtimes] NFCI: Drop intermediate CMake variable TARGET_TRIPLE

We might as well use the various XXX_TARGET_TRIPLE variables directly.

libcxx/CMakeLists.txt

@@ -480,10 +480,6 @@ elseif(CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN)
   set(LIBCXX_GCC_TOOLCHAIN "${CMAKE_CXX_COMPILER_EXTERNAL_TOOLCHAIN}")
 endif()
 
-if(LIBCXX_TARGET_TRIPLE)
-  set(TARGET_TRIPLE "${LIBCXX_TARGET_TRIPLE}")
-endif()
-
 # Configure compiler.
 include(config-ix)
 

libcxx/lib/abi/CMakeLists.txt

@@ -41,7 +41,7 @@ function(cxx_abi_list_identifier result triple abi_library abi_version unstable
 endfunction()
 
 cxx_abi_list_identifier(abi_list_identifier
-  "${TARGET_TRIPLE}"
+  "${LIBCXX_TARGET_TRIPLE}"
   "${LIBCXX_CXX_ABI_LIBNAME}"
   "${LIBCXX_ABI_VERSION}"
   "${LIBCXX_ABI_UNSTABLE}"

libcxx/test/CMakeLists.txt

@@ -105,8 +105,8 @@ if (NOT LIBCXX_ENABLE_DEBUG_MODE_SUPPORT)
   serialize_lit_param(enable_debug_tests False)
 endif()
 
-if (TARGET_TRIPLE)
-  serialize_lit_param(target_triple "\"${TARGET_TRIPLE}\"")
+if (LIBCXX_TARGET_TRIPLE)
+  serialize_lit_param(target_triple "\"${LIBCXX_TARGET_TRIPLE}\"")
 endif()
 
 if (LLVM_USE_SANITIZER)

libcxxabi/CMakeLists.txt

@@ -273,10 +273,6 @@ elseif(CMAKE_SYSROOT)
   set(LIBCXXABI_SYSROOT "${CMAKE_SYSROOT}")
 endif()
 
-if (LIBCXXABI_TARGET_TRIPLE)
-  set(TARGET_TRIPLE "${LIBCXXABI_TARGET_TRIPLE}")
-endif()
-
 # Configure compiler. Must happen after setting the target flags.
 include(config-ix)
 

libcxxabi/test/CMakeLists.txt

@@ -86,8 +86,8 @@ if (LLVM_USE_SANITIZER)
   serialize_lit_param(use_sanitizer "\"${LLVM_USE_SANITIZER}\"")
 endif()
 
-if (TARGET_TRIPLE)
-  serialize_lit_param(target_triple "\"${TARGET_TRIPLE}\"")
+if (LIBCXXABI_TARGET_TRIPLE)
+  serialize_lit_param(target_triple "\"${LIBCXXABI_TARGET_TRIPLE}\"")
 endif()
 
 if (LIBCXXABI_BUILD_32_BITS)

libunwind/CMakeLists.txt

@@ -167,10 +167,6 @@ elseif(CMAKE_SYSROOT)
   set(LIBUNWIND_SYSROOT "${CMAKE_SYSROOT}")
 endif()
 
-if (LIBUNWIND_TARGET_TRIPLE)
-  set(TARGET_TRIPLE "${LIBUNWIND_TARGET_TRIPLE}")
-endif()
-
 # Configure compiler.
 include(config-ix)
 

libunwind/test/CMakeLists.txt

@@ -36,8 +36,8 @@ if (LLVM_USE_SANITIZER)
   serialize_lit_param(use_sanitizer "\"${LLVM_USE_SANITIZER}\"")
 endif()
 
-if (TARGET_TRIPLE)
-  serialize_lit_param(target_triple "\"${TARGET_TRIPLE}\"")
+if (LIBUNWIND_TARGET_TRIPLE)
+  serialize_lit_param(target_triple "\"${LIBUNWIND_TARGET_TRIPLE}\"")
 endif()
 
 if (LIBUNWIND_BUILD_32_BITS)