[lldb] Add early CMake check for 'make' tool (#111531)

Many LLDB's dotest.py based tests require the `make` tool. If it's not found in Path, they fail with an obscure error and show up as `UNRESOLVED`. On Windows, llvm-lit takes care of MSYS based testing tools like cat, printf, etc., but `make` is not part of that. Let's catch the situation early and check for it at configuration time.

This error isn't fatal: It should fail the build, but not immediately stop the configuration process. There might be other issues further down the line that can be caught in the same buildbot run.

lldb/packages/Python/lldbsuite/test/dotest.py

@@ -268,10 +268,6 @@ def parseOptionsAndInitTestdirs():
 
     if args.make:
         configuration.make_path = args.make
-    elif platform_system == "FreeBSD" or platform_system == "NetBSD":
-        configuration.make_path = "gmake"
-    else:
-        configuration.make_path = "make"
 
     if args.dsymutil:
         configuration.dsymutil = args.dsymutil

lldb/test/API/CMakeLists.txt

@@ -49,6 +49,20 @@ set(LLDB_DEFAULT_TEST_EXECUTABLE "${LLVM_RUNTIME_OUTPUT_INTDIR}/lldb${CMAKE_EXEC
 
 set(LLDB_DEFAULT_TEST_DSYMUTIL "${LLVM_TOOLS_BINARY_DIR}/dsymutil${CMAKE_EXECUTABLE_SUFFIX}")
 
+if(LLDB_TEST_MAKE)
+  set(LLDB_DEFAULT_TEST_MAKE ${LLDB_TEST_MAKE})
+else()
+  find_program(LLDB_DEFAULT_TEST_MAKE make gmake)
+  if(LLDB_DEFAULT_TEST_MAKE)
+    message(STATUS "Found make: ${LLDB_DEFAULT_TEST_MAKE}")
+  else()
+    message(STATUS "Not found: make")
+    message(SEND_ERROR
+          "LLDB tests require 'make' tool. Please pass via `LLDB_TEST_MAKE` "
+          "(or otherwise disable tests with `LLDB_INCLUDE_TESTS=OFF`)")
+  endif()
+endif()
+
 if (TARGET clang)
   set(LLDB_DEFAULT_TEST_COMPILER "${LLVM_TOOLS_BINARY_DIR}/clang${CMAKE_EXECUTABLE_SUFFIX}")
 else()
@@ -58,6 +72,7 @@ endif()
 set(LLDB_TEST_EXECUTABLE "${LLDB_DEFAULT_TEST_EXECUTABLE}" CACHE PATH "lldb executable used for testing")
 set(LLDB_TEST_COMPILER "${LLDB_DEFAULT_TEST_COMPILER}" CACHE PATH "C Compiler to use for building LLDB test inferiors")
 set(LLDB_TEST_DSYMUTIL "${LLDB_DEFAULT_TEST_DSYMUTIL}" CACHE PATH "dsymutil used for generating dSYM bundles")
+set(LLDB_TEST_MAKE "${LLDB_DEFAULT_TEST_MAKE}" CACHE PATH "make tool used for building test executables")
 
 if ("${LLDB_TEST_COMPILER}" STREQUAL "")
   message(FATAL_ERROR "LLDB test compiler not specified. Tests will not run.")

lldb/test/API/lit.cfg.py

@@ -250,6 +250,9 @@ if is_configured("test_compiler"):
 if is_configured("dsymutil"):
     dotest_cmd += ["--dsymutil", config.dsymutil]
 
+if is_configured("make"):
+    dotest_cmd += ["--make", config.make]
+
 if is_configured("llvm_tools_dir"):
     dotest_cmd += ["--llvm-tools-dir", config.llvm_tools_dir]
 

lldb/test/API/lit.site.cfg.py.in

@@ -34,6 +34,7 @@ config.lldb_executable = lit_config.substitute('@LLDB_TEST_EXECUTABLE@')
 config.test_arch = '@LLDB_TEST_ARCH@'
 config.test_compiler = lit_config.substitute('@LLDB_TEST_COMPILER@')
 config.dsymutil = lit_config.substitute('@LLDB_TEST_DSYMUTIL@')
+config.make = lit_config.substitute('@LLDB_TEST_MAKE@')
 config.has_libcxx = @LLDB_HAS_LIBCXX@
 config.libcxx_libs_dir = "@LIBCXX_LIBRARY_DIR@"
 config.libcxx_include_dir = "@LIBCXX_GENERATED_INCLUDE_DIR@"