build: add support for GRUB in the build process

Signed-off-by: EnderIce2 <enderice2@protonmail.com>

tools/Makefile

@@ -5,6 +5,7 @@ export PATH := $(CROSS_DIR):$(PATH)
 BINUTILS_TAG = binutils-2_43_1
 GCC_TAG = releases/gcc-14.2.0
 QEMU_TAG = v9.2.0
+GRUB_TAG = grub-2.12
 
 default:
 	$(error Please specify a target)
@@ -68,6 +69,18 @@ else
 	$(info > TOOLS: Operation completed for gcc)
 endif
 
+__clone_grub:
+ifeq ("$(wildcard ./grub)", "")
+	git clone --depth 1 -b $(GRUB_TAG) https://git.savannah.gnu.org/git/grub.git grub
+else
+	$(info > TOOLS: Reseting grub...)
+	cd grub && \
+	git fetch origin && \
+	git reset --hard $(GRUB_TAG) && \
+	git clean -dfx
+	$(info > TOOLS: Operation completed for grub)
+endif
+
 __patch_cross_binutils: __clone_binutils
 	$(info > TOOLS: Patching binutils-gcc)
 	cd binutils-gdb && git apply ../binutils-gdb.patch
@@ -81,18 +94,22 @@ __patch_cross_gcc: __clone_gcc
 	$(info > TOOLS: Running autoconf for gcc/libstdc++-v3)
 	cd gcc/libstdc++-v3 && autoconf
 
+__patch_cross_grub: __clone_grub
+	$(info > TOOLS: Patching grub)
+	cd grub && git apply ../grub.patch
+
 __patch_cross_qemu: __clone_qemu
 	$(info > TOOLS: Patching qemu)
 	cd qemu && git apply ../qemu.patch
 
-__patch_cross: __patch_cross_binutils __patch_cross_gcc
+__patch_cross: __patch_cross_binutils __patch_cross_gcc __patch_cross_grub
 
 __prep_cross:
 	mkdir -p cross
 	mkdir -p binutils-gdb/__build
 	mkdir -p gcc/__build
 
-__clone_all_no_qemu: __clone_binutils __clone_gcc
+__clone_all_no_qemu: __clone_grub __clone_binutils __clone_gcc
 
 __clone_all: __clone_qemu __clone_all_no_qemu
 
@@ -114,6 +131,9 @@ endif
 ifeq ("$(wildcard ./qemu.patch.bk)", "")
 	mv qemu.patch qemu.patch.bk
 endif
+ifeq ("$(wildcard ./grub.patch.bk)", "")
+	mv grub.patch grub.patch.bk
+endif
 # binutils-gdb
 	cd binutils-gdb && \
 	git add . && \
@@ -126,6 +146,10 @@ endif
 	cd qemu && \
 	git add . && \
 	git diff --cached > ../qemu.patch
+# grub
+	cd grub && \
+	git add . && \
+	git diff --cached > ../grub.patch
 
 do_qemu:
 	$(MAKE) __patch_cross_qemu
@@ -139,6 +163,7 @@ do_qemu:
 	make --quiet -j$(shell nproc) && make --quiet install
 
 __do_binutils_x86_64:
+	mkdir -p binutils-gdb/__build
 	cd binutils-gdb/__build && \
 	../configure --target=x86_64-fennix \
 	--prefix="$(CROSS_DIR)" --disable-nls --quiet \
@@ -147,6 +172,7 @@ __do_binutils_x86_64:
 	make --quiet install
 
 __do_binutils_i386:
+	mkdir -p binutils-gdb/__build
 	cd binutils-gdb/__build && \
 	../configure --target=i386-fennix \
 	--prefix="$(CROSS_DIR)" --disable-nls --quiet \
@@ -155,6 +181,7 @@ __do_binutils_i386:
 	make --quiet install
 
 __do_binutils_arm:
+	mkdir -p binutils-gdb/__build
 	cd binutils-gdb/__build && \
 	../configure --target=arm-fennix \
 	--prefix="$(CROSS_DIR)" --disable-nls --quiet \
@@ -163,6 +190,7 @@ __do_binutils_arm:
 	make --quiet install
 
 __do_binutils_aarch64:
+	mkdir -p binutils-gdb/__build
 	cd binutils-gdb/__build && \
 	../configure --target=aarch64-fennix \
 	--prefix="$(CROSS_DIR)" --disable-nls --quiet \
@@ -185,6 +213,7 @@ do_binutils:
 	$(MAKE) __do_binutils_aarch64
 
 __do_gcc_x86_64:
+	mkdir -p gcc/__build
 	cd gcc/__build && \
 	../configure --target=x86_64-fennix --quiet \
 	--prefix="$(CROSS_DIR)" --disable-nls --enable-default-pie \
@@ -195,6 +224,7 @@ __do_gcc_x86_64:
 	make --quiet install-target-libgcc -j$(shell nproc)
 
 __do_gcc_i386:
+	mkdir -p gcc/__build
 	cd gcc/__build && \
 	../configure --target=i386-fennix --quiet \
 	--prefix="$(CROSS_DIR)" --disable-nls --enable-default-pie \
@@ -205,6 +235,7 @@ __do_gcc_i386:
 	make --quiet install-target-libgcc -j$(shell nproc)
 
 __do_gcc_arm:
+	mkdir -p gcc/__build
 	cd gcc/__build && \
 	../configure --target=arm-fennix --quiet \
 	--prefix="$(CROSS_DIR)" --disable-nls --enable-default-pie \
@@ -237,3 +268,53 @@ do_gcc:
 	$(MAKE) __do_gcc_arm
 	$(MAKE) __reset_gcc
 	$(MAKE) __do_gcc_aarch64
+
+__do_grub_x86_64:
+	cd grub && ./bootstrap
+	mkdir -p grub/__build
+	cd grub/__build && \
+	../configure --target=x86_64-linux \
+	--disable-nls && \
+	make all -j$(shell nproc) && \
+	make install
+
+__do_grub_i386:
+	cd grub && ./bootstrap
+	mkdir -p grub/__build
+	cd grub/__build && \
+	../configure --target=i386-linux \
+	--disable-nls && \
+	make all -j$(shell nproc) && \
+	make install
+
+__do_grub_arm:
+	cd grub && ./bootstrap
+	mkdir -p grub/__build
+	cd grub/__build && \
+	../configure --target=arm-linux \
+	--disable-nls && \
+	make all -j$(shell nproc) && \
+	make install
+
+__do_grub_aarch64:
+	cd grub && ./bootstrap
+	mkdir -p grub/__build
+	cd grub/__build && \
+	../configure --target=aarch64-linux \
+	--disable-nls && \
+	make all -j$(shell nproc) && \
+	make install
+
+__reset_grub:
+	$(MAKE) __patch_cross_grub
+	$(MAKE) __prep_cross
+
+do_grub:
+	$(MAKE) __reset_grub
+	$(MAKE) __do_grub_x86_64
+	$(MAKE) __reset_grub
+	$(MAKE) __do_grub_i386
+	$(MAKE) __reset_grub
+	$(MAKE) __do_grub_arm
+	$(MAKE) __reset_grub
+	$(MAKE) __do_grub_aarch64

tools/grub.patch

@@ -0,0 +1,9 @@
+diff --git a/.gitignore b/.gitignore
+index 2105d87..58fe53f 100644
+--- a/.gitignore
++++ b/.gitignore
+@@ -281,3 +281,4 @@ widthspec.bin
+ /xfs_test
+ /xzcompress_test
+ /zfs_test
++/__build