6 files changed, 14 insertions, 76 deletions
diff --git a/tools/build/Makefile.build b/tools/build/Makefile.build
index 89430338a3d9..fac42486a8cf 100644
--- a/tools/build/Makefile.build
+++ b/tools/build/Makefile.build
@@ -117,6 +117,16 @@ $(OUTPUT)%.s: %.c FORCE
 	$(call rule_mkdir)
 	$(call if_changed_dep,cc_s_c)
 
+# bison and flex files are generated in the OUTPUT directory
+# so it needs a separate rule to depend on them properly
+$(OUTPUT)%-bison.o: $(OUTPUT)%-bison.c FORCE
+	$(call rule_mkdir)
+	$(call if_changed_dep,$(host)cc_o_c)
+
+$(OUTPUT)%-flex.o: $(OUTPUT)%-flex.c FORCE
+	$(call rule_mkdir)
+	$(call if_changed_dep,$(host)cc_o_c)
+
 # Gather build data:
 #   obj-y        - list of build objects
 #   subdir-y     - list of directories to nest
diff --git a/tools/build/feature/Makefile b/tools/build/feature/Makefile
index f0c5de018a95..dad79ede4e0a 100644
--- a/tools/build/feature/Makefile
+++ b/tools/build/feature/Makefile
@@ -340,7 +340,7 @@ $(OUTPUT)test-jvmti-cmlr.bin:
 	$(BUILD)
 
 $(OUTPUT)test-llvm.bin:
-	$(BUILDXX) -std=gnu++14 				\
+	$(BUILDXX) -std=gnu++17 				\
 		-I$(shell $(LLVM_CONFIG) --includedir) 		\
 		-L$(shell $(LLVM_CONFIG) --libdir)		\
 		$(shell $(LLVM_CONFIG) --libs Core BPF)		\
@@ -348,17 +348,15 @@ $(OUTPUT)test-llvm.bin:
 		> $(@:.bin=.make.output) 2>&1
 
 $(OUTPUT)test-llvm-version.bin:
-	$(BUILDXX) -std=gnu++14					\
+	$(BUILDXX) -std=gnu++17					\
 		-I$(shell $(LLVM_CONFIG) --includedir)		\
 		> $(@:.bin=.make.output) 2>&1
 
 $(OUTPUT)test-clang.bin:
-	$(BUILDXX) -std=gnu++14					\
+	$(BUILDXX) -std=gnu++17					\
 		-I$(shell $(LLVM_CONFIG) --includedir) 		\
 		-L$(shell $(LLVM_CONFIG) --libdir)		\
-		-Wl,--start-group -lclangBasic -lclangDriver	\
-		  -lclangFrontend -lclangEdit -lclangLex	\
-		  -lclangAST -Wl,--end-group 			\
+		-Wl,--start-group -lclang-cpp -Wl,--end-group	\
 		$(shell $(LLVM_CONFIG) --libs Core option)	\
 		$(shell $(LLVM_CONFIG) --system-libs)		\
 		> $(@:.bin=.make.output) 2>&1
diff --git a/tools/build/feature/test-clang.cpp b/tools/build/feature/test-clang.cpp
deleted file mode 100644
index 7d87075cd1c5..000000000000
--- a/tools/build/feature/test-clang.cpp
+++ /dev/null
@@ -1,28 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include "clang/Basic/Version.h"
-#if CLANG_VERSION_MAJOR < 8
-#include "clang/Basic/VirtualFileSystem.h"
-#endif
-#include "clang/Driver/Driver.h"
-#include "clang/Frontend/TextDiagnosticPrinter.h"
-#include "llvm/ADT/IntrusiveRefCntPtr.h"
-#include "llvm/Support/ManagedStatic.h"
-#if CLANG_VERSION_MAJOR >= 8
-#include "llvm/Support/VirtualFileSystem.h"
-#endif
-#include "llvm/Support/raw_ostream.h"
-
-using namespace clang;
-using namespace clang::driver;
-
-int main()
-{
-	IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
-	IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();
-
-	DiagnosticsEngine Diags(DiagID, &*DiagOpts);
-	Driver TheDriver("test", "bpf-pc-linux", Diags);
-
-	llvm::llvm_shutdown();
-	return 0;
-}
diff --git a/tools/build/feature/test-cxx.cpp b/tools/build/feature/test-cxx.cpp
deleted file mode 100644
index 396aaedd2418..000000000000
--- a/tools/build/feature/test-cxx.cpp
+++ /dev/null
@@ -1,16 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <iostream>
-#include <memory>
-
-static void print_str(std::string s)
-{
-	std::cout << s << std::endl;
-}
-
-int main()
-{
-	std::string s("Hello World!");
-	print_str(std::move(s));
-	std::cout << "|" << s << "|" << std::endl;
-	return 0;
-}
diff --git a/tools/build/feature/test-llvm-version.cpp b/tools/build/feature/test-llvm-version.cpp
deleted file mode 100644
index 8a091625446a..000000000000
--- a/tools/build/feature/test-llvm-version.cpp
+++ /dev/null
@@ -1,12 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <cstdio>
-#include "llvm/Config/llvm-config.h"
-
-#define NUM_VERSION (((LLVM_VERSION_MAJOR) << 16) + (LLVM_VERSION_MINOR << 8) + LLVM_VERSION_PATCH)
-#define pass int main() {printf("%x\n", NUM_VERSION); return 0;}
-
-#if NUM_VERSION >= 0x030900
-pass
-#else
-# error This LLVM is not tested yet.
-#endif
diff --git a/tools/build/feature/test-llvm.cpp b/tools/build/feature/test-llvm.cpp
deleted file mode 100644
index 88a3d1bdd9f6..000000000000
--- a/tools/build/feature/test-llvm.cpp
+++ /dev/null
@@ -1,14 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include "llvm/Support/ManagedStatic.h"
-#include "llvm/Support/raw_ostream.h"
-#define NUM_VERSION (((LLVM_VERSION_MAJOR) << 16) + (LLVM_VERSION_MINOR << 8) + LLVM_VERSION_PATCH)
-
-#if NUM_VERSION < 0x030900
-# error "LLVM version too low"
-#endif
-int main()
-{
-	llvm::errs() << "Hello World!\n";
-	llvm::llvm_shutdown();
-	return 0;
-}