Added more kconfig options

15 files changed, 242 insertions, 90 deletions

diff --git a/.github/FUNDING.yml b/.github/FUNDING.yml
new file mode 100644
index 00000000..ce0ab007
--- /dev/null
+++ b/.github/FUNDING.yml
@@ -0,0 +1 @@
+buy_me_a_coffee: fiedorowico
diff --git a/Kconfig b/Kconfig
index 3713029d..2b4969b2 100644
--- a/Kconfig
+++ b/Kconfig
@@ -1,15 +1,111 @@
 mainmenu "Openlinux Configuration"
 
+config MODULES
+    bool
+    modules
+    default y
+
 menu "General Setup"
+    choice
+        prompt "Select target architecture"
+        default ARCH_X86_64
+    
+        config ARCH_X86_64
+            bool "x86_64"
+            help
+                Target the x86_64 architecture.
+    
+        # config ARCH_AARCH64
+        #     bool "aarch64"
+        #     help
+        #         Target the ARM 64-bit architecture.
+    
+    endchoice
+
+    config LLVM
+        bool "Use LLVM/Clang toolchain"
+        default y
+        help
+            Select this option to use the LLVM/Clang toolchain
+            for building the system instead of GCC.
+
     config WERROR
+	default n
         bool "Compile the system with -Werror"
 	help
 	  If you select this option, all compiler warnings will be treated as errors.
 
     config DEBUG
         bool "Enable Debugging Features"
+	default y
 	help
 	  Enable this option to include debugging symbols and additional debug information in the build.
+
+    choice
+    	prompt "Compiler optimization level"
+    	default OPTIMIZATION_LEVEL_G
+
+
+    config OPTIMIZATION_LEVEL_O0
+    	bool "No optimization (-O0)"
+    	help
+    		Compile the system without any optimization.
+    		This is useful for debugging but results in
+    		slower binaries.
+    
+    config OPTIMIZATION_LEVEL_G
+    	bool "Optimize for debugging (-Og)"
+    	help
+    		Compile the system with optimizations that
+    		are compatible with debugging, providing a
+    		balance between performance and debuggability.
+    
+    config OPTIMIZATION_LEVEL_O1
+    	bool "Optimize for size and speed (-O1)"
+    	help
+    		Compile the system with basic optimizations
+    		that improve performance without significantly
+    		increasing compile time.
+    
+    config OPTIMIZATION_LEVEL_O2
+    	bool "Optimize for speed (-O2)"
+    	help
+    		Compile the system with optimizations that
+    		improve execution speed. This is a good
+    		balance between performance and compile time.
+    
+    config OPTIMIZATION_LEVEL_O3
+    	bool "Optimize for maximum speed (-O3)"
+    	help
+    		Compile the system with aggressive optimizations
+    		that maximize execution speed, potentially at
+    		the cost of longer compile times and larger binaries.
+    
+    config OPTIMIZATION_LEVEL_S
+    	bool "Optimize for size (-Os)"
+    	help
+    		Compile the system with optimizations that
+    		reduce binary size, which is useful for
+    		resource-constrained environments.
+    
+    config OPTIMIZATION_LEVEL_Z
+    	bool "Optimize for minimum size (-Oz)"
+    	help
+    		Compile the system with optimizations that
+    		focus on minimizing binary size as much as
+    		possible, often at the expense of performance.
+    
+    config OPTIMIZATION_LEVEL_FAST
+    	bool "Optimize for maximum speed (Ofast)"
+    	depends on LLVM
+    	help
+    		Compile the system with aggressive optimizations
+    		that may violate strict standards compliance
+    		to achieve the highest possible performance.
+    endchoice
+
 endmenu
 
+source "boot/Kconfig"
+source "lib/Kconfig"
 source "bin/Kconfig"
diff --git a/bin/Kbuild b/bin/Kbuild
index d33a8bbe..b06279b2 100644
--- a/bin/Kbuild
+++ b/bin/Kbuild
@@ -1,13 +1,11 @@
-obj-y += playground/
-
-obj-y += basename/
-obj-y += clear/
-obj-y += echo/
-obj-y += false/
-obj-y += free/
-obj-y += gzip/
-obj-y += pwd/
-obj-y += sleep/
-obj-y += sync/
-obj-y += true/
-obj-y += yes/
+obj-$(CONFIG_BIN_BASENAME) += basename/
+obj-$(CONFIG_BIN_CLEAR)    += clear/
+obj-$(CONFIG_BIN_ECHO)     += echo/
+obj-$(CONFIG_BIN_FALSE)    += false/
+obj-$(CONFIG_BIN_FREE)     += free/
+obj-$(CONFIG_BIN_GZIP)     += gzip/
+obj-$(CONFIG_BIN_PWD)      += pwd/
+obj-$(CONFIG_BIN_SLEEP)    += sleep/
+obj-$(CONFIG_BIN_SYNC)     += sync/
+obj-$(CONFIG_BIN_TRUE)     += true/
+obj-$(CONFIG_BIN_YES)      += yes/
diff --git a/bin/Kconfig b/bin/Kconfig
index 0dcab22e..67e4e63d 100644
--- a/bin/Kconfig
+++ b/bin/Kconfig
@@ -1,46 +1,51 @@
 # bin/Kconfig
 
-menu "Binary Utilities Configuration"
+menu "Command-line tools"
+
 config BIN_CLEAR
     bool "clear"
     default y
+    depends on LIB_LIBC
     help
-      Enable the 'clear' command to clear the terminal screen.
+      Build/Add the 'clear' command to clear the terminal screen.
 
 config BIN_ECHO
     bool "echo"
     default y
+    depends on LIB_LIBC
     help
-      Enable the 'echo' command to display a line of text.
+      Build/Add the 'echo' command to display a line of text.
 
 config BIN_FALSE
     bool "false"
     default y
     help
-      Enable the 'false' command which returns a non-zero exit status.
+      Build/Add the 'false' command which returns a non-zero exit status.
 
 config BIN_FREE
     bool "free"
     default y
+    depends on LIB_LIBC
     help
-      Enable the 'free' command to display memory usage.
+      Build/Add the 'free' command to display memory usage.
 
 config BIN_GZIP
     bool "gzip"
     default n
+    depends on LIB_LIBC && LIB_LIBM
     help
-      Enable the 'gzip' command to compress files using the gzip algorithm.
+      Build/Add the 'gzip' command to compress files using the gzip algorithm.
 
 config BIN_SYNC
     bool "sync"
     default y
     help
-      Enable the 'sync' command to flush filesystem buffers.
+      Build/Add the 'sync' command to flush filesystem buffers.
 
 config BIN_TRUE
     bool "true"
     default y
     help
-      Enable the 'true' command which returns a zero exit status.
+      Build/Add the 'true' command which returns a zero exit status.
 
 endmenu
diff --git a/bin/clear/Kbuild b/bin/clear/Kbuild
index 3e56e161..845df317 100644
--- a/bin/clear/Kbuild
+++ b/bin/clear/Kbuild
@@ -1,4 +1,3 @@
 bin-y := clear
 obj-y += clear.o
 libs-y += $(srctree)/lib/libc/libc.a
-install-y := bin/clear
diff --git a/bin/echo/Kbuild b/bin/echo/Kbuild
index 0f816ddf..00d6ecdd 100644
--- a/bin/echo/Kbuild
+++ b/bin/echo/Kbuild
@@ -1,4 +1,3 @@
 bin-y := echo
 obj-y += echo.o
 libs-y += $(srctree)/lib/libc/libc.a
-install-y := bin/echo
diff --git a/bin/false/Kbuild b/bin/false/Kbuild
index 2f8e102d..122d0838 100644
--- a/bin/false/Kbuild
+++ b/bin/false/Kbuild
@@ -1,4 +1,2 @@
 bin-y := false
 obj-y += arch/
-
-install-y := bin/false
diff --git a/boot/Kbuild b/boot/Kbuild
index 01daa04b..cb673478 100644
--- a/boot/Kbuild
+++ b/boot/Kbuild
@@ -1 +1 @@
-obj-y += init/
+obj-$(CONFIG_BOOT_INIT) += init/
diff --git a/boot/Kconfig b/boot/Kconfig
new file mode 100644
index 00000000..ae77f1cb
--- /dev/null
+++ b/boot/Kconfig
@@ -0,0 +1,8 @@
+menu "Boot"
+
+config BOOT_INIT
+	bool "init"
+	default n
+	depends on LIB_LIBC
+
+endmenu
diff --git a/lib/Kbuild b/lib/Kbuild
index 903a240c..a398e39c 100644
--- a/lib/Kbuild
+++ b/lib/Kbuild
@@ -1,2 +1,2 @@
-obj-y += libc/
-obj-y += libm/
+obj-$(CONFIG_LIB_LIBC) += libc/
+obj-$(CONFIG_LIB_LIBM) += libm/
diff --git a/lib/Kconfig b/lib/Kconfig
new file mode 100644
index 00000000..d5854b78
--- /dev/null
+++ b/lib/Kconfig
@@ -0,0 +1,24 @@
+# lib/Kconfig
+
+menu "Libraries"
+
+config LIB_LIBC
+	tristate "libc"
+	default m
+	help
+		Build/Add the 'libc' library.
+
+config LIB_LIBC_HEADERS
+	bool "libc headers"
+	default n
+	help
+		Add the 'libc' library headers.
+
+
+config LIB_LIBM
+	tristate "libm"
+	default n
+	help
+		Build/Add the 'libm' library.
+
+endmenu
diff --git a/lib/libc/Kbuild b/lib/libc/Kbuild
index 60ab4f8e..762c95aa 100644
--- a/lib/libc/Kbuild
+++ b/lib/libc/Kbuild
@@ -1,5 +1,4 @@
-lib-y := libc.a
-install-y := lib/libc.a
+lib-$(CONFIG_LIB_LIBC) := libc.a
 
 cflags-y += -I $(src)/internal/include
 
diff --git a/lib/libm/Kbuild b/lib/libm/Kbuild
index 7dc47f30..b857231d 100644
--- a/lib/libm/Kbuild
+++ b/lib/libm/Kbuild
@@ -1,5 +1,4 @@
-lib-y := libm.a
-install-y := lib/libm.a
+lib-$(CONFIG_LIB_LIBM) := libm.a
 
 obj-y += __cos.o
 obj-y += __cosdf.o
diff --git a/makefile b/makefile
index a99129e9..b3aed7d6 100644
--- a/makefile
+++ b/makefile
@@ -12,28 +12,6 @@ this-makefile = $(lastword $(MAKEFILE_LIST))
 srctree = $(realpath $(dir $(this-makefile)))
 .DEFAULT_GOAL := all
 
-LLVM ?= 1
-ifneq ($(LLVM),1)
-  ifneq ($(filter %/,$(LLVM)),)
-    LLVM_PREFIX = $(LLVM)
-  else ifneq ($(filter -%,$(LLVM)),)
-    LLVM_SUFFIX = $(LLVM)
-  endif
-endif
-
-# Variables
-ifeq ($(LLVM),1)
-  CC      = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
-  LD      = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX)
-  AR      = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX)
-  STRIP   = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX)
-else
-  CC = $(CROSS_COMPILE)gcc
-  LD = $(CROSS_COMPILE)ld
-  AR = $(CROSS_COMPILE)ar
-  STRIP = $(CROSS_COMPILE)strip
-endif
-
 ifndef ARCH
   ARCH := x86_64
 endif
@@ -65,7 +43,25 @@ KCONFIG_CONFIG ?= .config
 
 -include ${KCONFIG_CONFIG}
 
-# CFLAGS
+ifneq ($(CONFIG_LLVM),1)
+  ifneq ($(filter %/,$(LLVM)),)
+    LLVM_PREFIX = $(LLVM)
+  else ifneq ($(filter -%,$(LLVM)),)
+    LLVM_SUFFIX = $(LLVM)
+  endif
+endif
+
+ifeq ($(CONFIG_LLVM),1)
+  CC      = $(LLVM_PREFIX)clang$(LLVM_SUFFIX)
+  LD      = $(LLVM_PREFIX)ld.lld$(LLVM_SUFFIX)
+  AR      = $(LLVM_PREFIX)llvm-ar$(LLVM_SUFFIX)
+  STRIP   = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX)
+else
+  CC = $(CROSS_COMPILE)gcc
+  LD = $(CROSS_COMPILE)ld
+  AR = $(CROSS_COMPILE)ar
+  STRIP = $(CROSS_COMPILE)strip
+endif
 
 KBUILD_CFLAGS := -x c
 
@@ -99,9 +95,9 @@ endif
 KBUILD_LDFLAGS :=
 KBUILD_ASFLAGS :=
 ifeq ($(CONFIG_DEBUG),y)
-KBUILD_CFLAGS += -g -O0 -fno-omit-frame-pointer -fno-stack-protector
+KBUILD_CFLAGS += -g
 else
-KBUILD_CFLAGS += -O2 -fdata-sections -ffunction-sections
+KBUILD_CFLAGS += -fdata-sections -ffunction-sections
 KBUILD_CFLAGS += -fno-unwind-tables -fomit-frame-pointer
 KBUILD_CFLAGS += -flto
 
@@ -121,21 +117,41 @@ KBUILD_ASFLAGS += -target $(ARCH)-linux-eabi
 KBUILD_ASFLAGS += -I$(srctree)/include
 KUILD_ASFLAGS += -I$(srctree)/include/arch/$(ARCH)
 
+ifdef CONFIG_OPTIMIZATION_LEVEL_O0
+KBUILD_CFLAGS += -O0
+else ifdef CONFIG_OPTIMIZATION_LEVEL_G
+KBUILD_CFLAGS += -Og
+else ifdef CONFIG_OPTIMIZATION_LEVEL_O1
+KBUILD_CFLAGS += -O1
+else ifdef CONFIG_OPTIMIZATION_LEVEL_O2
+KBUILD_CFLAGS += -O2
+else ifdef CONFIG_OPTIMIZATION_LEVEL_O3
+KBUILD_CFLAGS += -O3
+else ifdef CONFIG_OPTIMIZATION_LEVEL_Os
+KBUILD_CFLAGS += -Os
+else ifdef CONFIG_OPTIMIZATION_LEVEL_Oz
+KBUILD_CFLAGS += -Oz
+else ifdef CONFIG_OPTIMIZATION_LEVEL_FAST
+KBUILD_CFLAGS += -Ofast
+endif
+
 PHONY :=
 
 export Q srctree MAKEFLAGS KCONFIG_CONFIG \
        KBUILD_CFLAGS KBUILD_ASFLAGS KBUILD_LDFLAGS
 
 PHONY += install
-all: compile_commands.json
+all:
 	$(Q)$(MAKE) -f scripts/makefile.build obj=$(obj)
 
 PHONY += install
 install: all
 	$(Q)$(MAKE) -f scripts/makefile.build obj=$(obj) install
+ifdef CONFIG_LIB_LIBC_HEADERS
 	mkdir -p $(O)/usr
 	cp -r $(srctree)/include $(O)/usr/
 	rm -rf $(O)/usr/include/arch $(O)/usr/include/generated ${O}/usr/include/config
+endif
 
 PHONY += clean
 clean:
@@ -162,13 +178,16 @@ PHONY += help
 help:
 	@echo "Available make targets:"
 	@echo "  all                  - Build the project (default)"
-	@echo "  install              - Install the built files"
+	@echo "  clang-format         - Format source files using clang-format"
+	@echo "  clang-tidy           - Run clang-tidy on the source files"
 	@echo "  clean                - Clean build files"
 	@echo "  distclean            - Clean all generated files"
-	@echo "  menuconfig           - Launch the menu-based configuration tool"
 	@echo "  include-what-you-use - Run include-what-you-use on the source files"
-	@echo "  clang-tidy           - Run clang-tidy on the source files"
-	@echo "  clang-format         - Format source files using clang-format"
+	@echo "  install              - Install the built files"
+	@echo "  menuconfig           - Launch the menu-based configuration tool"
+	@echo "Flags:"
+	@echo "  o=<dir>/             - Destination directory"
+	@echo "  obj=<dir>/           - Build single target"
 
 compile_commands.json:
 	$(Q)bear -- $(MAKE) -f scripts/makefile.build obj=$(obj) all
diff --git a/scripts/makefile.build b/scripts/makefile.build
index 6467d2ad..e4926b3e 100644
--- a/scripts/makefile.build
+++ b/scripts/makefile.build
@@ -11,6 +11,8 @@ src := $(patsubst %/,%,$(obj))
 
 ifdef lib-y
   export cflags-y
+else ifdef lib-m
+  export cflags-y
 endif
 
 ifdef bin-y
@@ -18,8 +20,16 @@ ifdef bin-y
   export ldflags-y
 endif
 
+ifneq ($(strip $(lib-y) $(lib-m) $(lib-n)),)
+lib = $(lib-y)$(lib-m)$(lib-n)
+endif
+ifneq ($(strip $(bin-y) $(bin-n)),)
+bin = $(bin-y)$(bin-n)
+endif
+
+
 objects := $(filter %.o,$(obj-y))
-subdirs := $(filter %/,$(obj-y))
+subdirs := $(filter %/,$(obj-y)) $(filter %/,$(obj-m))
 
 cflags := $(cflags-y) $(KBUILD_CFLAGS) -MMD -MP
 asflags := $(asflags-y) $(KBUILD_ASFLAGS)
@@ -29,7 +39,8 @@ collect-obj-y = $(foreach e,$(shell echo 'all:; @echo $$(obj-y)' | \
   $(MAKE) -f $(obj)$(1)Kbuild -f - --no-print-directory 2>/dev/null),\
   $(if $(filter %/,$(e)),$(addprefix $(e),$(call collect-obj-y,$(1)$(e))),$(e)))
 
-ifdef lib-y
+
+ifneq ($(strip $(lib-y) $(lib-m)),)
   subdir-objects := $(foreach d,$(subdirs),$(addprefix $(d),$(call collect-obj-y,$(d))))
   all-objects := $(objects) $(subdir-objects)
 else ifdef bin-y
@@ -47,23 +58,26 @@ s-sources := $(wildcard $(addprefix $(obj),$(objects:.o=.s)))
 subdir-c-sources := $(wildcard $(addprefix $(obj),$(subdir-objects:.o=.c)))
 subdir-s-sources := $(wildcard $(addprefix $(obj),$(subdir-objects:.o=.s)))
 
-PHONY := all
+PHONY := all install
 
 ifdef lib-y
 all: $(obj)$(lib-y) $(addprefix $(obj),$(always))
-$(obj)$(lib-y): $(addprefix $(obj),$(all-objects))
+$(obj)$(lib): $(addprefix $(obj),$(all-objects))
 	$(MSG) AR "$@"
 	$(Q)$(AR) rcs $@ $^
 
-$(O)/$(install-y): $(obj)$(lib-y)
-	mkdir -p $(O)/$(dir $(install-y))
-	install -m 0644 $< $(O)/$(install-y)
+$(O)/$(parent)/$(lib-y): $(obj)$(lib-y)
+	$(Q)mkdir -p $(O)/$(dir $@)
+	$(Q)install -m 0644 $< $@
 
-ifdef install-y
-install: $(O)/$(install-y)
-else
-install:
-endif
+install: $(O)/$(parent)/$(lib-y)
+
+else ifdef lib-m
+all: $(obj)$(lib-m) $(addprefix $(obj),$(always))
+
+$(obj)$(lib): $(addprefix $(obj),$(all-objects))
+	$(MSG) AR "$@"
+	$(Q)$(AR) rcs $@ $^
 
 else ifdef bin-y
 all: $(obj)$(bin-y) $(addprefix $(obj),$(always))
@@ -72,16 +86,11 @@ $(obj)$(bin-y): $(addprefix $(obj),$(all-objects)) $(libs-y) ${prereq}
 	$(MSG) LD "$@"
 	$(Q)$(LD) $(ldflags) -o $@ $^
 
-ifdef install-y
-$(O)/$(install-y): $(obj)$(bin-y)
-	mkdir -p $(O)/$(dir $(install-y))
-	install -m 0755 $< $(O)/$(install-y)
-
-install: $(O)/$(install-y)
-else
-install:
-endif
+$(O)/$(parent)/$(bin-y): $(obj)$(bin-y)
+	$(Q)mkdir -p $(O)/$(parent)
+	$(Q)install -m 0755 $< $@
 
+install: $(O)/$(parent)/$(bin-y)
 else
 all: $(addprefix $(obj),$(all-objects)) $(subdirs) $(addprefix $(obj),$(always))
 
@@ -99,29 +108,27 @@ endif
 ifdef all-objects
 	$(Q)rm -f $(addprefix $(obj),$(all-objects))
 endif
-ifdef lib-y
-	$(Q)rm -f $(obj)$(lib-y)
+ifdef lib
+	$(Q)rm -f "$(obj)$(lib)"
 endif
-ifdef bin-y
-	$(Q)rm -f $(obj)$(bin-y)
+ifdef bin
+	$(Q)rm -f $(obj)$(bin)
 endif
 ifdef always
 	$(Q)rm -f $(addprefix $(obj),$(always))
 endif
 
-# Build C sources to objects
 $(filter $(addprefix $(obj),$(all-objects)),$(c-sources:.c=.o) $(subdir-c-sources:.c=.o)): $(obj)%.o: $(obj)%.c
 	$(MSG) CC "$@"
 	$(Q)$(CC) $(cflags) -c $< -o $@
 
-# Build assembly sources to objects
 $(filter $(addprefix $(obj),$(all-objects)),$(s-sources:.s=.o) $(subdir-s-sources:.s=.o)): $(obj)%.o: $(obj)%.s
 	$(MSG) AS "$@"
 	$(Q)$(CC) $(asflags) -c $< -o $@
 
 .PHONY: $(subdirs)
 $(subdirs):
-	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.build obj="$(obj)$@" ${MAKECMDGOALS}
+	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.build obj="$(obj)$@" parent="$(obj)" ${MAKECMDGOALS}
 
 clean-%:
 	$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.build obj="$(obj)$*" clean