remove application build support from top level Makefile on Linux

Signed-off-by: Marcel Cornu <marcel.d.cornu@intel.com>

Makefile

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2020-2023, Intel Corporation
+# Copyright (c) 2020-2024, Intel Corporation
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are met:
@@ -25,25 +25,18 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 
-.PHONY: all clean style install uninstall help TAGS
+.PHONY: all clean style install uninstall help TAGS warning build-cmake clean-cmake
 
-all:
+BUILD_DIR ?= build
+
+all: warning
 	$(MAKE) -C lib
-	$(MAKE) -C test
-	$(MAKE) -C perf
-	$(MAKE) -C examples
 
 clean:
 	$(MAKE) -C lib clean
-	$(MAKE) -C test clean
-	$(MAKE) -C perf clean
-	$(MAKE) -C examples clean
 
 style:
 	$(MAKE) -C lib style
-	$(MAKE) -C test style
-	$(MAKE) -C perf style
-	$(MAKE) -C examples style
 
 install:
 	$(MAKE) -C lib install
@@ -57,42 +50,30 @@ help:
 doxy:
 	$(MAKE) -C lib doxy
 
-.PHONY: TAGS
 TAGS:
 	find ./ -name "*.[ch]" -print | etags -
 	find ./ -name '*.asm'  | etags -a -
 	find ./ -name '*.inc'  | etags -a -
 
-# Check spelling in the code with codespell.
-# See https://github.com/codespell-project/codespell for more details.
-# Codespell options explained:
-# -d        -- disable colours (emacs colours it anyway)
-# -L        -- List of words to be ignored
-# -S <skip> -- skip file types
-# -I FILE   -- File containing words to be ignored
-#
-CODESPELL ?= codespell
-CS_IGNORE_WORDS ?= iinclude,struc,fo,ue,od,ba,padd
-
-.PHONY: spellcheck
-spellcheck:
-	$(CODESPELL) -d -L $(CS_IGNORE_WORDS) \
-	-S "*.obj,*.o,*.a,*.so,*.lib,*~,*.so,*.so.*,*.d,imb-perf" \
-	-S "imb-kat,imb-xvalid,imb-acvp,imb-fuzz-api,imb-fuzz-direct-api" \
-	-S "imb-wycheproof" \
-	./lib ./perf ./test README.md SECURITY.md CONTRIBUTING \
-	Makefile win_x64.mak ReleaseNotes.txt LICENSE $(CS_EXTRA_OPTS)
-
 # cppcheck analysis check
 cppcheck:
 	$(MAKE) -C lib cppcheck
-	$(MAKE) -C test cppcheck
-	$(MAKE) -C perf cppcheck
-	$(MAKE) -C examples cppcheck
 
 # cppcheck bughunt analysis check
 bughunt:
 	$(MAKE) -C lib bughunt
-	$(MAKE) -C test bughunt
-	$(MAKE) -C perf bughunt
-	$(MAKE) -C examples bughunt
+
+# build cmake project
+build-cmake:
+	cmake -B $(BUILD_DIR)
+	cmake --build $(BUILD_DIR) --parallel
+
+# clean cmake project
+clean-cmake:
+	cmake --build $(BUILD_DIR) --target clean
+
+warning:
+	@echo "NOTE: Building the project with Makefiles is deprecated since v2.0 (replaced by CMake)."
+	@echo "      Starting from v2.0, only the library can be built using Makefiles and not the applications."
+	@echo "      See INSTALL.md for instructions to build the library and applications using CMake."
+	@echo ""