Implemented printf and friends

tests/CMakeLists.txt

@@ -3,7 +3,7 @@ file(GLOB test_sources ${CMAKE_CURRENT_SOURCE_DIR}/*.c)
 foreach (test ${test_sources})
     get_filename_component(test_name ${test} NAME_WE)
     add_executable(${test_name} ${test} $<TARGET_OBJECTS:crt>)
-    target_compile_options(${test_name} PRIVATE -ffreestanding -nostdlib -nostdinc)
+    target_compile_options(${test_name} PRIVATE -ffreestanding -nostdlib)
     target_include_directories(${test_name} PRIVATE
         ${CMAKE_CURRENT_BINARY_DIR}/../sysroot/usr/include)
     target_link_libraries(${test_name} c)

tests/start.c

@@ -3,6 +3,6 @@
 
 int main(int argc, char **argv)
 {
-    fputs("Hello, world!\n", stdout);
+    printf("Hello, world!\n");
     return 0;
 }