[clang][lit] Allow test cases to use the compiler that are used to compile Clang

Required by D83660.
Test cases may want to use the host compiler to compile some mocks for the
test case.

This patch adds two substitutions `%host_cc` and `%host_cxx` to use the host
compilers set via variable `CMAKE_C_COMPILER` and `CMAKE_CXX_COMPILER`.

Patch by Ella Ma!

Reviewed By: steakhal

Differential Revision: https://reviews.llvm.org/D98918

diff --git a/clang/test/lit.cfg.py b/clang/test/lit.cfg.py
index 863ab44..f9f49d7 100644 (file)
--- a/clang/test/lit.cfg.py
+++ b/clang/test/lit.cfg.py
@@ -92,6 +92,9 @@ config.substitutions.append(
     ('%hmaptool', "'%s' %s" % (config.python_executable,
                              os.path.join(config.clang_tools_dir, 'hmaptool'))))
 
+config.substitutions.append(('%host_cc', config.host_cc))
+config.substitutions.append(('%host_cxx', config.host_cxx))
+
 
 # Plugins (loadable modules)
 if config.has_plugins and config.llvm_plugin_ext:

diff --git a/clang/test/lit.site.cfg.py.in b/clang/test/lit.site.cfg.py.in
index c3382e2..85526b9 100644 (file)
--- a/clang/test/lit.site.cfg.py.in
+++ b/clang/test/lit.site.cfg.py.in
@@ -15,6 +15,7 @@ config.clang_src_dir = path(r"@CLANG_SOURCE_DIR@")
 config.clang_tools_dir = path(r"@CLANG_TOOLS_DIR@")
 config.host_triple = "@LLVM_HOST_TRIPLE@"
 config.target_triple = "@TARGET_TRIPLE@"
+config.host_cc = "@CMAKE_C_COMPILER@"
 config.host_cxx = "@CMAKE_CXX_COMPILER@"
 config.llvm_use_sanitizer = "@LLVM_USE_SANITIZER@"
 config.have_zlib = @LLVM_ENABLE_ZLIB@