On Sun, Nov 14, 2021 at 4:27 PM brian m. carlson <sandals@xxxxxxxxxxxxxxxxxxxx> wrote: > +#if __STDC_VERSION__ - 0 < 199901L > +/* > + * Git is in a testing period for mandatory C99 support in the compiler. If > + * your compiler is reasonably recent, you can try to enable C99 support (or, > + * for MSVC, C11 support). If you encounter a problem and can't enable C99 > + * support with your compiler and don't have access to one with this support, > + * such as GCC or Clang, you can remove this #if directive, but please report > + * the details of your system to git@xxxxxxxxxxxxxxx. > + */ > +#error "Required C99 support is in a test phase. Please see git-compat-util.h for more details." You don't need to encapsulate the #error message in double quotes.