[Analysis] Only run plugins tests if plugins are actually enabled

When plugins aren't enabled, don't try to run plugins tests. Don't
enable plugins unconditionally based on the platform, instead check
if LLVM shared library is actually being built which may not be the
case for every host configuration, even if the host itself supports
plugins.

This addresses test failures introduced by r360891/D59464.

Differential Revision: https://reviews.llvm.org/D62050

llvm-svn: 360991

clang/test/Analysis/checker-plugins.c

@@ -1,9 +1,9 @@
+// REQUIRES: plugins
+
 // RUN: %clang_analyze_cc1 -verify %s \
 // RUN:   -load %llvmshlibdir/SampleAnalyzerPlugin%pluginext \
 // RUN:   -analyzer-checker='example.MainCallChecker'
 
-// REQUIRES: plugins
-
 // Test that the MainCallChecker example analyzer plugin loads and runs.
 
 int main();

clang/test/CMakeLists.txt

@@ -24,7 +24,8 @@ llvm_canonicalize_cmake_booleans(
   CLANG_ENABLE_STATIC_ANALYZER
   ENABLE_BACKTRACES
   HAVE_LIBZ
-  LLVM_ENABLE_PER_TARGET_RUNTIME_DIR)
+  LLVM_ENABLE_PER_TARGET_RUNTIME_DIR
+  LLVM_ENABLE_PLUGINS)
 
 configure_lit_site_cfg(
   ${CMAKE_CURRENT_SOURCE_DIR}/lit.site.cfg.py.in

clang/test/lit.cfg.py

@@ -85,13 +85,7 @@ config.substitutions.append(
                              os.path.join(config.clang_tools_dir, 'hmaptool'))))
 
 # Plugins (loadable modules)
-# TODO: This should be supplied by Makefile or autoconf.
-if sys.platform in ['win32', 'cygwin']:
-    has_plugins = config.enable_shared
-else:
-    has_plugins = True
-
-if has_plugins and config.llvm_plugin_ext:
+if config.has_plugins and config.llvm_plugin_ext:
     config.available_features.add('plugins')
 
 # Set available features we allow tests to conditionalize on.

clang/test/lit.site.cfg.py.in

@@ -27,6 +27,7 @@ config.enable_backtrace = @ENABLE_BACKTRACES@
 config.host_arch = "@HOST_ARCH@"
 config.python_executable = "@PYTHON_EXECUTABLE@"
 config.use_z3_solver = lit_config.params.get('USE_Z3_SOLVER', "@USE_Z3_SOLVER@")
+config.has_plugins = @LLVM_ENABLE_PLUGINS@
 
 # Support substitution of the tools and libs dirs with user parameters. This is
 # used when we can't determine the tool dir at configuration time.

llvm/cmake/modules/HandleLLVMOptions.cmake

@@ -920,14 +920,10 @@ endif()
 
 # Plugin support
 # FIXME: Make this configurable.
-if(WIN32 OR CYGWIN)
-  if(BUILD_SHARED_LIBS OR LLVM_BUILD_LLVM_DYLIB)
-    set(LLVM_ENABLE_PLUGINS ON)
-  else()
-    set(LLVM_ENABLE_PLUGINS OFF)
-  endif()
-else()
+if(BUILD_SHARED_LIBS OR LLVM_BUILD_LLVM_DYLIB)
   set(LLVM_ENABLE_PLUGINS ON)
+else()
+  set(LLVM_ENABLE_PLUGINS OFF)
 endif()
 
 # By default we should enable LLVM_ENABLE_IDE only for multi-configuration