From 2df7f8a1e5adc22b273e5881780457c84d8d18b7 Mon Sep 17 00:00:00 2001
From: Bananymous <bananymousosq@gmail.com>
Date: Fri, 2 Jun 2023 18:39:42 +0300
Subject: [PATCH] BuildSystem: add rule to build libstdc++

We can now build libstdc++ and actually link with g++
---
 CMakeLists.txt           | 6 ++++++
 toolchain/build.sh       | 7 +++++++
 userspace/CMakeLists.txt | 1 -
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9597154a..4984c52f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -54,6 +54,12 @@ add_custom_target(toolchain
 	USES_TERMINAL
 )
 
+add_custom_target(libstdc++
+	COMMAND ${CMAKE_COMMAND} -E env LIBSTDCPP="1" ${CMAKE_SOURCE_DIR}/toolchain/build.sh
+	DEPENDS libc-install
+	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/toolchain/build.sh b/toolchain/build.sh
index 6cdae7da..5524bb22 100755
--- a/toolchain/build.sh
+++ b/toolchain/build.sh
@@ -6,6 +6,13 @@ GCC_VERSION="gcc-12.2.0"
 
 cd $(dirname "$0")
 
+if [[ -n $LIBSTDCPP ]]; then
+	cd build/${GCC_VERSION}/
+	make -j $(nproc) all-target-libstdc++-v3
+	make install-target-libstdc++-v3
+	exit 0
+fi
+
 if [[ -z $SYSROOT ]]; then
 	echo "You must set the SYSROOT environment variable" >&2
 	exit 1
diff --git a/userspace/CMakeLists.txt b/userspace/CMakeLists.txt
index e4a65c69..0138f20e 100644
--- a/userspace/CMakeLists.txt
+++ b/userspace/CMakeLists.txt
@@ -17,7 +17,6 @@ add_custom_target(userspace)
 add_custom_target(userspace-install DEPENDS userspace)
 
 foreach(USERSPACE_PROJECT ${USERSPACE_PROJECTS})
-	target_link_options(${USERSPACE_PROJECT} PUBLIC -nodefaultlibs)
 	add_dependencies(userspace ${USERSPACE_PROJECT})
 	add_dependencies(userspace-install ${USERSPACE_PROJECT}-install)
 endforeach()