LGMT, built with Clang 7 and GCC 8.

No, I now get this warning with Clang 7

../liboctave/external/blas-xtra/xerbla.c:65:12: warning: format specifies type 'int' but the argument has type 'long' [-Wformat]
           (long) (*info));
           ^~~~~~~~~~~~~~

I think you shouldn't have dropped the '%ld', the warning message was about the '*' in the '%.*s' format conversion.

I guess I was a little too smart using size_t here.  This string won't be long (usually less than 9 characters), so it is probably fine to use int for the value.

While compiling stable with

parent: 25523:5daeb4049088 tip
 gui: fix editor rendering on some displays, disable QScintilla buffered drawing
branch: stable

I get the following compilation warning.

liboctave/external/blas-xtra/xerbla.c: In function ‘xerbla_’:
liboctave/external/blas-xtra/xerbla.c:64:19: warning: field precision specifier ‘.*’ expects argument of type ‘int’, but argument 3 has type ‘size_t {aka long unsigned int}’ [-Wformat=]
   fprintf (stderr, "%.*s: parameter number %ld is invalid\n", slen, s,

Seems easy enough to fix, and should be done before 4.4.1 release.