global: update licenses

20 files changed, 431 insertions, 71 deletions

diff --git a/env.sh b/env.sh
index 4341157..4c7ae0b 100644
--- a/env.sh
+++ b/env.sh
@@ -1,5 +1,23 @@
 #!/usr/bin/env bash
 
+#
+# CMOS
+# Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
 dir="$(dirname "$(readlink -f "${BASH_SOURCE[0]}")")"
 
 export PATH="$dir/toolchain/cross/bin:$dir/toolchain/host/bin:$PATH"
diff --git a/kernel/boot/init/boot.s b/kernel/boot/init/boot.s
index 6b40c1c..363f98e 100644
--- a/kernel/boot/init/boot.s
+++ b/kernel/boot/init/boot.s
@@ -1,3 +1,21 @@
+/*
+* CMOS
+* Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 /* Adapted from https://wiki.osdev.org/Bare_Bones */
 
 /* Declare constants for the multiboot header. */
diff --git a/kernel/boot/init/crti.s b/kernel/boot/init/crti.s
index 4e221ab..8ea5c60 100644
--- a/kernel/boot/init/crti.s
+++ b/kernel/boot/init/crti.s
@@ -1,3 +1,21 @@
+/*
+* CMOS
+* Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 .section .init
 .global _init
 .type _init, @function
diff --git a/kernel/boot/init/crtn.s b/kernel/boot/init/crtn.s
index 0d58006..7109b57 100644
--- a/kernel/boot/init/crtn.s
+++ b/kernel/boot/init/crtn.s
@@ -1,3 +1,21 @@
+/*
+* CMOS
+* Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 .section .init
     /* gcc will nicely put the contents of crtend.o's .init section here. */
     popl %ebp
diff --git a/kernel/boot/link.ld b/kernel/boot/link.ld
index e6498d5..75239d2 100644
--- a/kernel/boot/link.ld
+++ b/kernel/boot/link.ld
@@ -1,3 +1,21 @@
+/*
+* CMOS
+* Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 /* The bootloader will look at this image and start execution at the symbol
    designated as the entry point. */
 ENTRY(_start)
diff --git a/kernel/drivers/vga_text_buffer/vga_text_buffer.c b/kernel/drivers/vga_text_buffer/vga_text_buffer.c
index d8013ae..d400f2d 100644
--- a/kernel/drivers/vga_text_buffer/vga_text_buffer.c
+++ b/kernel/drivers/vga_text_buffer/vga_text_buffer.c
@@ -1,3 +1,21 @@
+/*
+* CMOS
+* Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 #include <stddef.h>
 #include <stdint.h>
 #include <stdbool.h>
diff --git a/kernel/include/driver/vga_text_buffer.h b/kernel/include/driver/vga_text_buffer.h
index d292419..7d46b54 100644
--- a/kernel/include/driver/vga_text_buffer.h
+++ b/kernel/include/driver/vga_text_buffer.h
@@ -1,3 +1,21 @@
+/*
+* CMOS
+* Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 #ifndef __drivers_vga_text_buffer_h
 #define __drivers_vga_text_buffer_h
 
diff --git a/kernel/include/libk/io.h b/kernel/include/libk/io.h
index 4de1af9..ac31038 100644
--- a/kernel/include/libk/io.h
+++ b/kernel/include/libk/io.h
@@ -1,3 +1,21 @@
+/*
+* CMOS
+* Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 #ifndef __libk_io_h
 #define __libk_io_h
 
diff --git a/kernel/include/libk/string.h b/kernel/include/libk/string.h
index 7ec7adc..7a92dfa 100644
--- a/kernel/include/libk/string.h
+++ b/kernel/include/libk/string.h
@@ -1,3 +1,21 @@
+/*
+* CMOS
+* Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 #ifndef __libk_string_h
 #define __libk_string_h
 
diff --git a/kernel/kernel/kernel.c b/kernel/kernel/kernel.c
index f5dcf08..a650a31 100644
--- a/kernel/kernel/kernel.c
+++ b/kernel/kernel/kernel.c
@@ -1,3 +1,21 @@
+/*
+* CMOS
+* Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 #include <libk/io.h>
 
 #include <driver/vga_text_buffer.h>
diff --git a/kernel/libk/printk.c b/kernel/libk/printk.c
index b255dbe..4326d01 100644
--- a/kernel/libk/printk.c
+++ b/kernel/libk/printk.c
@@ -1,3 +1,21 @@
+/*
+* CMOS
+* Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 #include <libk/io.h>
 #include <driver/vga_text_buffer.h>
 
diff --git a/kernel/libk/strlen.c b/kernel/libk/strlen.c
index 9fdcec9..656b06f 100644
--- a/kernel/libk/strlen.c
+++ b/kernel/libk/strlen.c
@@ -1,3 +1,21 @@
+/*
+* CMOS
+* Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
 #include <stddef.h>
 
 #include <libk/string.h>
diff --git a/scripts/build-toolchain.sh b/scripts/build-toolchain.sh
index 4a7efce..a59c79c 100755
--- a/scripts/build-toolchain.sh
+++ b/scripts/build-toolchain.sh
@@ -1,5 +1,23 @@
 #!/usr/bin/env bash
 
+#
+# CMOS
+# Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
 set -xe
 
 tar cf - toolchain/host toolchain/cross | pigz > toolchain.tar.gz
diff --git a/scripts/fetch-toolchain.sh b/scripts/fetch-toolchain.sh
index f933131..19b8cdc 100755
--- a/scripts/fetch-toolchain.sh
+++ b/scripts/fetch-toolchain.sh
@@ -1,5 +1,23 @@
 #!/usr/bin/env bash
 
+#
+# CMOS
+# Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
 set -xe
 
 rm -rf toolchain.tar.gz toolchain/host toolchain/cross
diff --git a/toolchain/Makefile b/toolchain/Makefile
index 9a9b70f..142132b 100644
--- a/toolchain/Makefile
+++ b/toolchain/Makefile
@@ -1,10 +1,28 @@
+#
+# CMOS
+# Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
 export ROOT_DIR := $(shell dirname $(realpath $(firstword $(MAKEFILE_LIST))))
 export BUILD_DIR := $(ROOT_DIR)/build
 export OUT_DIR := $(ROOT_DIR)
 export PARALLEL_CORES := 16
 
 all:
-	# $(MAKE) -f host_binutils.mk
-	# $(MAKE) -f host_gcc.mk
-	$(MAKE) -f cross_binutils.mk
-	$(MAKE) -f cross_gcc.mk
+    # $(MAKE) -f host_binutils.mk
+    # $(MAKE) -f host_gcc.mk
+    $(MAKE) -f cross_binutils.mk
+    $(MAKE) -f cross_gcc.mk
diff --git a/toolchain/cross_binutils.mk b/toolchain/cross_binutils.mk
index 721ec85..71ed0d5 100644
--- a/toolchain/cross_binutils.mk
+++ b/toolchain/cross_binutils.mk
@@ -1,3 +1,21 @@
+#
+# CMOS
+# Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
 include utils.mk
 
 VERSION := 2.42
@@ -18,28 +36,28 @@ all: install
 $(call add-to-path,$(shell pwd)/host/bin)
 
 $(FILE):
-	mkdir -p $(DIR)
-	wget $(URL) -O $(FILE)
+    mkdir -p $(DIR)
+    wget $(URL) -O $(FILE)
 
 unpack: $(FILE)
-	tar xf $(FILE) -C $(DIR)
+    tar xf $(FILE) -C $(DIR)
 
 configure: unpack
-	mkdir -p $(BUILD)
-	cd $(BUILD)
-	$(SRC)/configure \
-		--prefix=$(OUT) \
-		--target=$(TOOLCHAIN_TARGET) \
-		--disable-nls \
-		--with-sysroot
+    mkdir -p $(BUILD)
+    cd $(BUILD)
+    $(SRC)/configure \
+	--prefix=$(OUT) \
+	--target=$(TOOLCHAIN_TARGET) \
+	--disable-nls \
+	--with-sysroot
 
 build: configure
-	cd $(BUILD)
-	$(MAKE) -j$(PARALLEL_CORES)
+    cd $(BUILD)
+    $(MAKE) -j$(PARALLEL_CORES)
 
 install: build
-	cd $(BUILD)
-	$(MAKE) install
+    cd $(BUILD)
+    $(MAKE) install
 
 clean:
-	rm -rf $(DIR) $(FILE) $(OUT)
+    rm -rf $(DIR) $(FILE) $(OUT)
diff --git a/toolchain/cross_gcc.mk b/toolchain/cross_gcc.mk
index 35fa8de..f82a6d6 100644
--- a/toolchain/cross_gcc.mk
+++ b/toolchain/cross_gcc.mk
@@ -1,3 +1,21 @@
+#
+# CMOS
+# Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
 include utils.mk
 
 VERSION := 14.2.0
@@ -19,36 +37,36 @@ $(call add-to-path,$(shell pwd)/cross/bin)
 $(call add-to-path,$(shell pwd)/host/bin)
 
 $(FILE):
-	mkdir -p $(DIR)
-	wget $(URL) -O $(FILE)
+    mkdir -p $(DIR)
+    wget $(URL) -O $(FILE)
 
 unpack: $(FILE)
-	tar xf $(FILE) -C $(DIR)
+    tar xf $(FILE) -C $(DIR)
 
 configure: unpack
-	cd $(SRC)
-	./contrib/download_prerequisites
-	mkdir -p $(BUILD)
-	cd $(BUILD)
-	$(SRC)/configure \
-		--prefix=$(OUT) \
-		--target=$(TOOLCHAIN_TARGET) \
-		--disable-nls \
-		--enable-languages=c,c++ \
-		--without-headers \
-		--disable-hosted-libstdcxx
+    cd $(SRC)
+    ./contrib/download_prerequisites
+    mkdir -p $(BUILD)
+    cd $(BUILD)
+    $(SRC)/configure \
+	--prefix=$(OUT) \
+	--target=$(TOOLCHAIN_TARGET) \
+	--disable-nls \
+	--enable-languages=c,c++ \
+	--without-headers \
+	--disable-hosted-libstdcxx
 
 build: configure
-	cd $(BUILD)
-	$(MAKE) -j$(PARALLEL_CORES) all-gcc
-	$(MAKE) -j$(PARALLEL_CORES) all-target-libgcc
-	$(MAKE) -j$(PARALLEL_CORES) all-target-libstdc++-v3
+    cd $(BUILD)
+    $(MAKE) -j$(PARALLEL_CORES) all-gcc
+    $(MAKE) -j$(PARALLEL_CORES) all-target-libgcc
+    $(MAKE) -j$(PARALLEL_CORES) all-target-libstdc++-v3
 
 install: build
-	cd $(BUILD)
-	$(MAKE) install-gcc
-	$(MAKE) install-target-libgcc
-	$(MAKE) install-target-libstdc++-v3
+    cd $(BUILD)
+    $(MAKE) install-gcc
+    $(MAKE) install-target-libgcc
+    $(MAKE) install-target-libstdc++-v3
 
 clean:
-	rm -rf $(DIR) $(FILE) $(OUT)
+    rm -rf $(DIR) $(FILE) $(OUT)
diff --git a/toolchain/host_binutils.mk b/toolchain/host_binutils.mk
index f906238..6d24f88 100644
--- a/toolchain/host_binutils.mk
+++ b/toolchain/host_binutils.mk
@@ -1,3 +1,21 @@
+#
+# CMOS
+# Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
 VERSION := 2.42
 URL := https://ftp.gnu.org/gnu/binutils/binutils-$(VERSION).tar.gz
 
@@ -12,26 +30,26 @@ all: install
 .ONESHELL:
 
 $(FILE):
-	mkdir -p $(DIR)
-	wget $(URL) -O $(FILE)
+    mkdir -p $(DIR)
+    wget $(URL) -O $(FILE)
 
 unpack: $(FILE)
-	tar xf $(FILE) -C $(DIR)
+    tar xf $(FILE) -C $(DIR)
 
 configure: unpack
-	mkdir -p $(BUILD)
-	cd $(BUILD)
-	$(SRC)/configure \
-		--prefix=$(OUT) \
-		--disable-nls
+    mkdir -p $(BUILD)
+    cd $(BUILD)
+    $(SRC)/configure \
+	--prefix=$(OUT) \
+	--disable-nls
 
 build: configure
-	cd $(BUILD)
-	$(MAKE) -j$(PARALLEL_CORES)
+    cd $(BUILD)
+    $(MAKE) -j$(PARALLEL_CORES)
 
 install: build
-	cd $(BUILD)
-	$(MAKE) install
+    cd $(BUILD)
+    $(MAKE) install
 
 clean:
-	rm -rf $(DIR) $(FILE) $(OUT)
+    rm -rf $(DIR) $(FILE) $(OUT)
diff --git a/toolchain/host_gcc.mk b/toolchain/host_gcc.mk
index c30758c..422a96b 100644
--- a/toolchain/host_gcc.mk
+++ b/toolchain/host_gcc.mk
@@ -1,3 +1,21 @@
+#
+# CMOS
+# Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
 VERSION := 14.2.0
 URL := https://ftp.gnu.org/gnu/gcc/gcc-$(VERSION)/gcc-$(VERSION).tar.gz
 
@@ -12,29 +30,29 @@ all: install
 .ONESHELL:
 
 $(FILE):
-	mkdir -p $(DIR)
-	wget $(URL) -O $(FILE)
+    mkdir -p $(DIR)
+    wget $(URL) -O $(FILE)
 
 unpack: $(FILE)
-	tar xf $(FILE) -C $(DIR)
+    tar xf $(FILE) -C $(DIR)
 
 configure: unpack
-	cd $(SRC)
-	./contrib/download_prerequisites
-	mkdir -p $(BUILD)
-	cd $(BUILD)
-	$(SRC)/configure \
-		--prefix=$(OUT) \
-		--disable-nls \
-		--enable-languages=c,c++
+    cd $(SRC)
+    ./contrib/download_prerequisites
+    mkdir -p $(BUILD)
+    cd $(BUILD)
+    $(SRC)/configure \
+	--prefix=$(OUT) \
+	--disable-nls \
+	--enable-languages=c,c++
 
 build: configure
-	cd $(BUILD)
-	$(MAKE) -j$(PARALLEL_CORES)
+    cd $(BUILD)
+    $(MAKE) -j$(PARALLEL_CORES)
 
 install: build
-	cd $(BUILD)
-	$(MAKE) install
+    cd $(BUILD)
+    $(MAKE) install
 
 clean:
-	rm -rf $(DIR) $(FILE) $(OUT)
+    rm -rf $(DIR) $(FILE) $(OUT)
diff --git a/toolchain/utils.mk b/toolchain/utils.mk
index db9d0a3..53724e4 100644
--- a/toolchain/utils.mk
+++ b/toolchain/utils.mk
@@ -1,3 +1,21 @@
+#
+# CMOS
+# Copyright (C) 2024 Raghuram Subramani <raghus2247@gmail.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+
 add_to_path = $(eval PATH := $1:$(PATH))
 current-dir = $(dir $(lastword $(MAKEFILE_LIST)))
 all-makefiles-under = $(wildcard $(1)/*/module.mk)