CMake build system

cmake/utils/arch.cmake

@@ -0,0 +1,23 @@
+include_guard(GLOBAL)
+
+set(DETECT_ARCH_C ${CMAKE_BINARY_DIR}/detect_arch.c)
+
+file(WRITE ${DETECT_ARCH_C}
+"#include \"${SOURCE_DIR}/qcommon/q_platform.h\"
+#include <stdio.h>
+int main()
+{
+    puts(ARCH_STRING);
+    return 0;
+}
+")
+
+try_run(RUN_EXITCODE COMPILE_SUCCESS
+    ${CMAKE_BINARY_DIR} ${DETECT_ARCH_C}
+    RUN_OUTPUT_VARIABLE ARCH)
+
+string(STRIP ${ARCH} ARCH)
+
+if(NOT COMPILE_SUCCESS OR RUN_EXITCODE OR NOT ARCH)
+    message(FATAL_ERROR "Architecture detection failed")
+endif()