BuildSystem: userspace has cmake target

userspace/yes/CMakeLists.txt

@@ -0,0 +1,17 @@
+cmake_minimum_required(VERSION 3.26)
+
+project(yes CXX)
+
+set(SOURCES
+	main.cpp
+)
+
+add_executable(yes ${SOURCES})
+target_compile_options(yes PUBLIC -O2 -g)
+add_dependencies(yes libc-install)
+target_link_options(yes PUBLIC -nodefaultlibs -lc)
+
+add_custom_target(yes-install
+	COMMAND cp ${CMAKE_CURRENT_BINARY_DIR}/yes ${BANAN_BIN}/
+	DEPENDS yes
+)

userspace/yes/main.cpp

@@ -0,0 +1,8 @@
+#include <stdio.h>
+
+int main()
+{
+	for (;;)
+		puts("y");
+	return 0;
+}