Import very modest Userland.

Userland/Makefile

@@ -0,0 +1,27 @@
+OBJS = \
+       id.o
+
+ARCH_FLAGS =
+STANDARD_FLAGS = -std=c++17 -nostdinc++ -nostdlib
+USERLAND_FLAGS = -ffreestanding -fno-stack-protector -fno-ident
+WARNING_FLAGS = -Wextra -Wall -Wundef -Wcast-qual -Wwrite-strings
+FLAVOR_FLAGS = -fomit-frame-pointer -mregparm=3 -march=i386 -m32 -fno-exceptions -fno-rtti -ffunction-sections -fdata-sections -fmerge-all-constants -fno-unroll-loops -falign-functions=1 -falign-jumps=1 -falign-loops=1 -fno-pie -fno-pic
+OPTIMIZATION_FLAGS = -Os -fno-asynchronous-unwind-tables
+INCLUDE_FLAGS = -I.. -I.
+
+DEFINES = -DSERENITY -DSANITIZE_PTRS
+
+CXXFLAGS = $(WARNING_FLAGS) $(OPTIMIZATION_FLAGS) $(USERLAND_FLAGS) $(FLAVOR_FLAGS) $(ARCH_FLAGS) $(STANDARD_FLAGS) $(INCLUDE_FLAGS) $(DEFINES)
+CXX = g++
+LD = ld
+AR = ar
+LDFLAGS = -T linker.ld --strip-debug -melf_i386 --gc-sections --build-id=none -z norelro -z now
+
+all: $(OBJS)
+
+.cpp.o:
+	@echo "CXX $<"; $(CXX) $(CXXFLAGS) -o $@ -c $<
+
+clean:
+	@echo "CLEAN"; rm -f $(LIBRARY) $(OBJS)
+

Userland/id.cpp

@@ -0,0 +1,12 @@
+#include <LibC/unistd.h>
+#include <LibC/stdio.h>
+
+int main(int c, char** v)
+{
+    uid_t uid = getuid();
+    gid_t gid = getgid();
+    pid_t pid = getpid();
+    printf("uid=%u, gid=%u, pid=%u\n", uid, gid, pid);
+    return 0;
+}
+