Re: Problem with gpr file after updating GNAT

[Simon Wright <simon@pushface.org>]

Jerry <list_email@icloud.com> writes:

> And here is the complaint from GNAT when I try to build:
> build.gpr:61:19: "Uniform_Aperture_Sum.adb" is not a source of project "build"
> gprbuild: problems with main sources

I didn't get that, but I did get it if the two filenames were cased
differently (and Egil's 'package Naming' suggestion didn't fix
it). Different casing doesn't cause problems with an x86_64 gprbuild.

The reason is very probably to be found here in the GCC sources:
https://github.com/gcc-mirror/gcc/blob/master/gcc/ada/adaint.c#L599

   __gnat_get_file_names_case_sensitive (void)
   {
     if (file_names_case_sensitive_cache == -1)
       {
         const char *sensitive = getenv ("GNAT_FILE_NAME_CASE_SENSITIVE");

         if (sensitive != NULL
             && (sensitive[0] == '0' || sensitive[0] == '1')
             && sensitive[1] == '\0')
           file_names_case_sensitive_cache = sensitive[0] - '0';
         else
           {
             /* By default, we suppose filesystems aren't case sensitive on
                Windows and Darwin (but they are on arm-darwin).  */
   #if defined (WINNT) || defined (__DJGPP__) \
     || (defined (__APPLE__) && !(defined (__arm__) || defined (__arm64__)))
             file_names_case_sensitive_cache = 0;
   #else
             file_names_case_sensitive_cache = 1;
   #endif
           }
       }
     return file_names_case_sensitive_cache;
   }

which is Wrong; file names are case-insensitive on Darwin, x86_64 or
aarch64 (aka arm64).

On the other hand, it's gprbuild that's complaining.

Anyway, try "export GNAT_FILE_NAME_CASE_SENSITIVE=0".

Or, of course, you could use lower-case filenames for all Ada source.