Decide whether to enable plugin tests based on cmake variables

[john.brawn]

Summary

Clang plugins work when either LLVM_ENABLE_PLUGINS or LLVM_EXPORT_SYMBOLS_FOR_PLUGINS is ON, so enable the 'plugins' test feature when that is the case.

[john.brawn]

Ping.

[reames]

I know very little about our cmake infrastructure.

[• ehsan]

I also don't know enough about the build system to review this, sorry!

[john.brawn]

Abandoning this old obsolete patch.

test/lit.cfg

def inferClang(PATH):
 
     return clang
 
 config.clang = inferClang(config.environment['PATH']).replace('\\', '/')
 if not lit_config.quiet:
     lit_config.note('using clang: %r' % config.clang)
 
 # Plugins (loadable modules)
-# TODO: This should be supplied by Makefile or autoconf.
-if sys.platform in ['win32', 'cygwin']:
-    has_plugins = (config.enable_shared == 1)
-else:
-    has_plugins = True
-
+has_plugins = (config.llvm_enable_plugins == "ON" or
+               config.llvm_export_symbols_for_plugins == "ON")
 if has_plugins and config.llvm_plugin_ext:
     config.available_features.add('plugins')
 
 config.substitutions.append( ('%llvmshlibdir', config.llvm_shlib_dir) )
 config.substitutions.append( ('%pluginext', config.llvm_plugin_ext) )
 config.substitutions.append( ('%PATH%', config.environment['PATH']) )
 
 if config.clang_examples:

test/lit.site.cfg.in

 @LIT_SITE_CFG_IN_HEADER@
 
 import sys
 
 config.llvm_src_root = "@LLVM_SOURCE_DIR@"
 config.llvm_obj_root = "@LLVM_BINARY_DIR@"
 config.llvm_tools_dir = "@LLVM_TOOLS_DIR@"
 config.llvm_libs_dir = "@LLVM_LIBS_DIR@"
 config.llvm_shlib_dir = "@SHLIBDIR@"
+config.llvm_enable_plugins = "@LLVM_ENABLE_PLUGINS@"
+config.llvm_export_symbols_for_plugins = "@LLVM_EXPORT_SYMBOLS_FOR_PLUGINS@"
 config.llvm_plugin_ext = "@LLVM_PLUGIN_EXT@"
 config.lit_tools_dir = "@LLVM_LIT_TOOLS_DIR@"
 config.clang_obj_root = "@CLANG_BINARY_DIR@"
 config.clang_tools_dir = "@CLANG_TOOLS_DIR@"
 config.host_triple = "@LLVM_HOST_TRIPLE@"
 config.target_triple = "@TARGET_TRIPLE@"
 config.llvm_use_sanitizer = "@LLVM_USE_SANITIZER@"
 config.have_zlib = "@HAVE_LIBZ@"