feat(userspace): add dummy libstdc++ library

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

Fennix Userspace.code-workspace

@@ -19,7 +19,8 @@
 			"devcontainer",
 			"userspace/libs",
 			"userspace/apps/test",
-			"userspace/apps/usr"
+			"userspace/apps/usr",
+			"userspace"
 		]
 	}
 }

Userspace/libs/Makefile

@@ -2,9 +2,11 @@ build:
 	cp -a $(CURDIR)/include/. $(WORKSPACE_DIR)/out/include
 	make -C libgcc build
 	make -C libm build
+	make -C libstdc++ build
 	make -C libexample build
 
 clean:
 	make -C libgcc clean
 	make -C libm clean
+	make -C libstdc++ clean
 	make -C libexample clean

Userspace/libs/libstdc++/Makefile

@@ -0,0 +1,48 @@
+default:
+	$(error Do not run this Makefile directly!)
+
+DYNAMIC_NAME := $(notdir $(shell pwd)).so
+STATIC_NAME := $(notdir $(shell pwd)).a
+
+OUTPUT_DIR=$(WORKSPACE_DIR)/out/lib/
+SYSROOT = --sysroot=$(WORKSPACE_DIR)/out/
+
+S_SOURCES = $(shell find ./ -type f -name '*.S')
+C_SOURCES = $(shell find ./ -type f -name '*.c')
+CXX_SOURCES = $(shell find ./ -type f -name '*.cpp')
+OBJ = ${S_SOURCES:.S=.o} ${C_SOURCES:.c=.o} ${CXX_SOURCES:.cpp=.o}
+
+CFLAGS := -fvisibility=hidden -fPIC -I../include -I$(WORKSPACE_DIR)/out/include -DLIBC_GIT_COMMIT='"$(shell git rev-parse HEAD)"'
+
+ifeq ($(DEBUG), 1)
+	CFLAGS += -DDEBUG -ggdb3 -O0 -fdiagnostics-color=always
+endif
+
+build: $(DYNAMIC_NAME) $(STATIC_NAME)
+
+.PHONY: $(DYNAMIC_NAME) $(STATIC_NAME)
+
+$(DYNAMIC_NAME): $(OBJ)
+	$(info Linking $@)
+	$(CC) -nostdlib -shared -fPIC -fPIE -Wl,-soname,$(DYNAMIC_NAME) $(SYSROOT) $(OBJ) -o $(DYNAMIC_NAME)
+	cp $(DYNAMIC_NAME) $(OUTPUT_DIR)$(DYNAMIC_NAME)
+
+$(STATIC_NAME): $(OBJ)
+	$(info Linking $@)
+	$(AR) -rcs $(STATIC_NAME) $(OBJ)
+	cp $(STATIC_NAME) $(OUTPUT_DIR)$(STATIC_NAME)
+
+%.o: %.c
+	$(info Compiling $<)
+	$(CC) $(CFLAGS) -std=c17 -c $< -o $@
+
+%.o: %.cpp
+	$(info Compiling $<)
+	$(CC) $(CFLAGS) -std=c++20 -c $< -o $@
+
+%.o: %.S
+	$(info Compiling $<)
+	$(AS) -c $< -o $@
+
+clean:
+	rm -f $(OBJ) $(DYNAMIC_NAME) $(STATIC_NAME)

Userspace/libs/libstdc++/libstdc++.c

@@ -0,0 +1,18 @@
+/*
+	This file is part of Fennix Userspace.
+
+	Fennix Userspace 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.
+
+	Fennix Userspace 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 Fennix Userspace. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+/* dummy file */