From 8410abb3d9e16bdc9331c5a4842a5de0210bd9f6 Mon Sep 17 00:00:00 2001
From: mintsuki <mintsuki@protonmail.com>
Date: Fri, 18 Sep 2020 21:38:59 +0200
Subject: [PATCH] Build gzip and nasm as part of the toolchain to ensure
 reproducibility

---
 Makefile                    |  2 +-
 decompressor/Makefile       |  6 ++---
 stage2/Makefile             |  6 ++---
 toolchain/make_toolchain.sh | 51 ++++++++++++++++++++++++-------------
 4 files changed, 40 insertions(+), 25 deletions(-)

diff --git a/Makefile b/Makefile
index 669c8c89..f6a1301b 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,6 @@
 CC = cc
 CFLAGS = -O2 -pipe -Wall -Wextra
+PATH := $(shell pwd)/toolchain/bin:$(PATH)
 
 .PHONY: all clean stage2 stage2-clean decompressor decompressor-clean toolchain test.img echfs-test ext2-test fat32-test
 
@@ -10,7 +11,6 @@ all: stage2 decompressor
 clean: stage2-clean decompressor-clean
 	rm -f stage2/stage2.bin.gz
 	rm -f limine-install
-	# We don't remove limine.bin because not everyone wants to build the bootloader themselves.
 
 stage2:
 	$(MAKE) -C stage2 all
diff --git a/decompressor/Makefile b/decompressor/Makefile
index 734a309b..4fd006c5 100644
--- a/decompressor/Makefile
+++ b/decompressor/Makefile
@@ -1,6 +1,6 @@
-CC = ../toolchain/bin/i386-elf-gcc
-LD = ../toolchain/bin/i386-elf-gcc
-OBJCOPY = ../toolchain/bin/i386-elf-objcopy
+CC = i386-elf-gcc
+LD = i386-elf-gcc
+OBJCOPY = i386-elf-objcopy
 
 CFLAGS = -flto -Os -pipe -Wall -Wextra
 
diff --git a/stage2/Makefile b/stage2/Makefile
index e54cf336..1e998921 100644
--- a/stage2/Makefile
+++ b/stage2/Makefile
@@ -1,6 +1,6 @@
-CC = ../toolchain/bin/i386-elf-gcc
-LD = ../toolchain/bin/i386-elf-gcc
-OBJCOPY = ../toolchain/bin/i386-elf-objcopy
+CC = i386-elf-gcc
+LD = i386-elf-gcc
+OBJCOPY = i386-elf-objcopy
 
 CFLAGS = -flto -Os -pipe -Wall -Wextra
 
diff --git a/toolchain/make_toolchain.sh b/toolchain/make_toolchain.sh
index 00eb5230..f743d282 100755
--- a/toolchain/make_toolchain.sh
+++ b/toolchain/make_toolchain.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 
 set -e
 set -x
@@ -7,6 +7,8 @@ PREFIX="$(pwd)"
 TARGET=i386-elf
 BINUTILSVERSION=2.35
 GCCVERSION=10.2.0
+NASMVERSION=2.15.05
+GZIPVERSION=1.10
 
 if [ -z "$MAKEFLAGS" ]; then
 	MAKEFLAGS="$1"
@@ -15,29 +17,27 @@ export MAKEFLAGS
 
 export PATH="$PREFIX/bin:$PATH"
 
-if [ -x "$(command -v gmake)" ]; then
-    mkdir -p "$PREFIX/bin"
-    cat <<EOF >"$PREFIX/bin/make"
-#!/usr/bin/env sh
-gmake "\$@"
-EOF
-    chmod +x "$PREFIX/bin/make"
-fi
-
-mkdir -p build
-cd build
-
 if [ ! -f binutils-$BINUTILSVERSION.tar.gz ]; then
-    wget -4 https://ftp.gnu.org/gnu/binutils/binutils-$BINUTILSVERSION.tar.gz # Force IPv4 otherwise wget hangs
+    wget https://ftp.gnu.org/gnu/binutils/binutils-$BINUTILSVERSION.tar.gz
 fi
 if [ ! -f gcc-$GCCVERSION.tar.gz ]; then
-    wget -4 https://ftp.gnu.org/gnu/gcc/gcc-$GCCVERSION/gcc-$GCCVERSION.tar.gz # Same as above
+    wget https://ftp.gnu.org/gnu/gcc/gcc-$GCCVERSION/gcc-$GCCVERSION.tar.gz
+fi
+if [ ! -f nasm-$NASMVERSION.tar.gz ]; then
+    wget https://www.nasm.us/pub/nasm/releasebuilds/$NASMVERSION/nasm-$NASMVERSION.tar.gz
+fi
+if [ ! -f gzip-$GZIPVERSION.tar.gz ]; then
+    wget https://ftp.gnu.org/gnu/gzip/gzip-$GZIPVERSION.tar.gz
 fi
 
-tar -xf binutils-$BINUTILSVERSION.tar.gz
-tar -xf gcc-$GCCVERSION.tar.gz
+rm -rf build
+mkdir build
+cd build
 
-rm -rf build-gcc build-binutils
+tar -xf ../binutils-$BINUTILSVERSION.tar.gz
+tar -xf ../gcc-$GCCVERSION.tar.gz
+tar -xf ../nasm-$NASMVERSION.tar.gz
+tar -xf ../gzip-$GZIPVERSION.tar.gz
 
 mkdir build-binutils
 cd build-binutils
@@ -56,3 +56,18 @@ make all-gcc
 make all-target-libgcc
 make install-gcc
 make install-target-libgcc
+cd ..
+
+mkdir build-nasm
+cd build-nasm
+../nasm-$NASMVERSION/configure --prefix="$PREFIX"
+make
+make install
+cd ..
+
+mkdir build-gzip
+cd build-gzip
+../gzip-$GZIPVERSION/configure --prefix="$PREFIX"
+make
+make install
+cd ..