Lots of work on the build system

tests/CMakeLists.txt

@@ -4,5 +4,7 @@ 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_include_directories(${test_name} PRIVATE
+        ${CMAKE_CURRENT_BINARY_DIR}/../sysroot/usr/include)
     target_link_libraries(${test_name} c)
 endforeach (test)

tests/start.c

@@ -1,3 +1,6 @@
+#include <stdio.h>
+#include <stdint.h>
+
 int main(int argc, char **argv)
 {
     return 42;