Hi!

GCC with enabled algol68 fails to build on i686-linux, the error is
../../gcc/algol68/a68-low-multiples.cc:636:31: error: format ‘%ld’ expects 
argument of type ‘long int’, but argument 2 has type ‘size_t’ {aka ‘unsigned 
int’} [-Werror=format=]
xasprintf is printf family, so it can't use %zd portably, so the
following patch uses what is used elsewhere, the HOST_SIZE_T_PRINT*
macros with (fmt_size_t) cast - the macros pick the smallest of
%d, %ld and %lld depending on SIZE_MAX, but it could still disagree
on the exact type and cause warnings or for hosts with say 24-bit
size_t it could be even larger, so the cast is needed to handle that.

Bootstrapped/regtested on i686-linux, the only failures are:
FAIL: algol68/execute/widening-bits-2.a68 execution test,  *
FAIL: algol68/execute/widening-bits-3.a68 execution test,  *
(where by * I mean it fails at any optimization level).

Ok for trunk?

BTW, I see the algol68 commits had ChangeLog entries in commit
messages, but they were added to toplevel ChangeLog and gcc/ChangeLog.
That is caused by 2 things:
1) contrib/gcc-changelog/gcc_commit.py (default_changelog_locations)
   wasn't updated, if you want gcc/algol68/ChangeLog and
   libga68/ChangeLog, then it needs to be updated
2) almost empty ChangeLog files need to be checked in (with the last
   few lines in only - copyright, and in your case moving there
   stuff from gcc/ChangeLog and libga68/ChangeLog)
3) so that patches are precommit verified, the 1) change needs
   to be propagated to gccadmin's checked out copy

2025-12-01  Jakub Jelinek  <[email protected]>

        PR algol68/122926
        * a68-low-multiples.cc (copy_multiple_dimension_elems): Use
        HOST_SIZE_T_PRINT_DEC in xasprintf format string and cast to
        fmt_size_t.

--- gcc/algol68/a68-low-multiples.cc.jj 2025-11-30 21:49:44.136503080 +0100
+++ gcc/algol68/a68-low-multiples.cc    2025-12-01 00:34:18.147460525 +0100
@@ -633,7 +633,7 @@ copy_multiple_dimension_elems (size_t di
   tree element_type = TREE_TYPE (element_pointer_type);
   tree upb = a68_multiple_upper_bound (from, size_int (dim));
 
-  char *name = xasprintf ("r%ld%%", dim);
+  char *name = xasprintf ("r" HOST_SIZE_T_PRINT_DEC "%%", (fmt_size_t) dim);
   indexes[dim] = a68_lower_tmpvar (name, ssizetype,
                                   a68_multiple_lower_bound (from,
                                                             size_int (dim)));

        Jakub

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