feat(app): nolibc hello world

CMakeLists.txt

@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.15)
 project(
   c-libs
   DESCRIPTION "C Libraries for recreational Programming."
-  LANGUAGES C)
+  LANGUAGES C ASM)
 
 add_library(c-libs ${CMAKE_CURRENT_SOURCE_DIR}/src/dyn-arr.c
                    ${CMAKE_CURRENT_SOURCE_DIR}/src/string-view.c)
@@ -17,6 +17,22 @@ target_link_libraries(strings PRIVATE c-libs)
 add_executable(rc ${CMAKE_CURRENT_SOURCE_DIR}/app/rc.c)
 target_link_libraries(rc PRIVATE c-libs)
 
+add_executable(nolibc ${CMAKE_CURRENT_SOURCE_DIR}/app/nolibc.c
+                      ${CMAKE_CURRENT_SOURCE_DIR}/app/entry.s)
+target_compile_options(
+  nolibc PRIVATE -fno-asynchronous-unwind-tables -fno-unwind-tables
+                 -fno-stack-protector -ffunction-sections -fdata-sections)
+target_link_options(
+  nolibc
+  PRIVATE
+  -nostdlib
+  -static
+  -T
+  ${CMAKE_CURRENT_SOURCE_DIR}/app/nolibc.ld
+  -Wl,--strip-all
+  -Wl,--no-dynamic-linker
+  -Wl,--gc-sections)
+
 include(CTest)
 if(BUILD_TESTING)
   find_package(PkgConfig REQUIRED)