From 8a8793fd2d64ea850283aa7dd939c81441664385 Mon Sep 17 00:00:00 2001
From: Bananymous <bananymousosq@gmail.com>
Date: Thu, 6 Apr 2023 00:23:02 +0300
Subject: [PATCH] BuildSystem: you can now build the toolchain with cmake

---
 BAN/CMakeLists.txt    |  7 ++++++-
 CMakeLists.txt        | 13 +++++++++++++
 kernel/CMakeLists.txt |  8 ++++++--
 libc/CMakeLists.txt   |  7 ++++++-
 toolchain/build.sh    | 10 ++++------
 5 files changed, 35 insertions(+), 10 deletions(-)

diff --git a/BAN/CMakeLists.txt b/BAN/CMakeLists.txt
index 78d8aed7..49e239ec 100644
--- a/BAN/CMakeLists.txt
+++ b/BAN/CMakeLists.txt
@@ -2,7 +2,12 @@ cmake_minimum_required(VERSION 3.26)
 
 project(BAN CXX)
 
-add_custom_target(ban-install
+add_custom_target(ban-headers
 	COMMAND cp -r ${CMAKE_CURRENT_SOURCE_DIR}/include/* ${BANAN_INCLUDE}
 	DEPENDS sysroot
 )
+
+add_custom_target(ban-install
+	DEPENDS ban-headers
+)
+
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 46598c6e..1c4de99f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,6 +21,7 @@ set(BANAN_SYSROOT ${CMAKE_BINARY_DIR}/sysroot)
 set(BANAN_INCLUDE ${BANAN_SYSROOT}/usr/include)
 set(BANAN_BOOT ${BANAN_SYSROOT}/boot)
 set(DISK_IMAGE_PATH ${CMAKE_BINARY_DIR}/banan-os.img)
+set(TOOLCHAIN_PREFIX ${CMAKE_SOURCE_DIR}/toolchain/local)
 
 add_subdirectory(kernel)
 add_subdirectory(BAN)
@@ -33,6 +34,18 @@ add_custom_target(sysroot
 	COMMAND cp -r ${CMAKE_SOURCE_DIR}/base/* ${BANAN_SYSROOT}/
 )
 
+add_custom_target(headers
+	DEPENDS kernel-headers
+	DEPENDS ban-headers
+	DEPENDS libc-headers
+)
+
+add_custom_target(toolchain
+	COMMAND ${CMAKE_COMMAND} -E env SYSROOT="${BANAN_SYSROOT}" PREFIX="${TOOLCHAIN_PREFIX}" ARCH="${BANAN_ARCH}" ${CMAKE_SOURCE_DIR}/toolchain/build.sh
+	DEPENDS headers
+	USES_TERMINAL
+)
+
 add_custom_target(image
 	COMMAND ${CMAKE_COMMAND} -E env SYSROOT="${BANAN_SYSROOT}" DISK_IMAGE_PATH="${DISK_IMAGE_PATH}" ${CMAKE_SOURCE_DIR}/image.sh
 	DEPENDS kernel-install
diff --git a/kernel/CMakeLists.txt b/kernel/CMakeLists.txt
index eb3ea459..f9ff2ce4 100644
--- a/kernel/CMakeLists.txt
+++ b/kernel/CMakeLists.txt
@@ -122,10 +122,14 @@ endif()
 
 target_link_options(kernel PUBLIC -ffreestanding -nostdlib -O2)
 
-add_custom_target(kernel-install
+add_custom_target(kernel-headers
 	COMMAND cp -r ${CMAKE_CURRENT_SOURCE_DIR}/include/* ${BANAN_INCLUDE}/
-	COMMAND cp ${CMAKE_CURRENT_BINARY_DIR}/kernel ${BANAN_BOOT}/banan-os.kernel
 	DEPENDS sysroot
+)
+
+add_custom_target(kernel-install
+	COMMAND cp ${CMAKE_CURRENT_BINARY_DIR}/kernel ${BANAN_BOOT}/banan-os.kernel
+	DEPENDS kernel-headers
 	DEPENDS kernel
 )
 
diff --git a/libc/CMakeLists.txt b/libc/CMakeLists.txt
index c7b9b0e8..0205a5ad 100644
--- a/libc/CMakeLists.txt
+++ b/libc/CMakeLists.txt
@@ -2,7 +2,12 @@ cmake_minimum_required(VERSION 3.26)
 
 project(libc CXX)
 
-add_custom_target(libc-install
+add_custom_target(libc-headers
 	COMMAND cp -r ${CMAKE_CURRENT_SOURCE_DIR}/include/* ${BANAN_INCLUDE}
 	DEPENDS sysroot
 )
+
+add_custom_target(libc-install
+	DEPENDS libc-headers
+)
+
diff --git a/toolchain/build.sh b/toolchain/build.sh
index 81415b7d..2012acde 100755
--- a/toolchain/build.sh
+++ b/toolchain/build.sh
@@ -4,11 +4,7 @@ set -e
 BINUTILS_VERSION="binutils-2.39"
 GCC_VERSION="gcc-12.2.0"
 
-SYSROOT="$HOME/dev/banan-os/build/sysroot"
-PREFIX="$(pwd)/local"
-ARCH="x86_64"
-
-TARGET="${ARCH}-banan_os"
+cd $(dirname "$0")
 
 if [[ -z $SYSROOT ]]; then
 	echo "You must set the SYSROOT environment variable" >&2
@@ -20,11 +16,13 @@ if [[ -z $PREFIX ]]; then
 	exit 1
 fi
 
-if [[ -z $BANAN_AR ]]; then
+if [[ -z $ARCH ]]; then
 	echo  "You must set the ARCH environment variable" >&2
 	exit 1
 fi
 
+TARGET="${ARCH}-banan_os"
+
 if [ ! -f ${PREFIX}/bin/${TARGET}-ld ]; then
 
 	echo "Building ${BINUTILS_VERSION}"