[Bug 292672] lang/clisp: fix build with clang >= 20

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292672

--- Comment #3 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/ports/commit/?id=d8ec68ea76d97ff43e709b813629c862a6bf8211

commit d8ec68ea76d97ff43e709b813629c862a6bf8211
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2026-01-23 09:33:18 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2026-02-10 19:28:50 +0000

    lang/clisp: fix build with clang >= 20

    With clang 20 or higher lang/clisp fails to build, with errors similar to:

        ./lisp.run -B . -N locale -E UTF-8 -Emisc 1:1 -Epathname 1:1 -norc -m
2MW -M interpreted.mem -q -c compiler.lisp -o ./
        ;; Compiling file
/wrkdirs/usr/ports/lang/clisp/work/clisp-c3ec11bab87cfdbeba01523ed88ac2a16b22304d/src/compiler.lisp
...
        *** - LIST-INIT-START: start index 44801 too large for
               (#(NIL
                  #S(HASH-TABLE :TEST STABLEHASH-EQ
                  #:WARN-IF-NEEDS-REHASH-AFTER-GC T
                     (#<BUILT-IN-CLASS SYMBOL> .
                      #<COMPILED-FUNCTION CLOS::MAKE-INSTANCE-<EMF-1>-1>)
                     (#<STANDARD-CLASS FUNCALLABLE-STANDARD-CLASS> .
                      #<SYSTEM-FUNCTION CLOS::%MAKE-INSTANCE>)
                     (#<STANDARD-CLASS STANDARD-CLASS> .
                      #<SYSTEM-FUNCTION CLOS::%MAKE-INSTANCE>)))
                CLOS::COMPUTE-APPLICABLE-METHODS-EFFECTIVE-METHOD
                #<STANDARD-GENERIC-FUNCTION MAKE-INSTANCE>)

        0 errors, 0 warnings
        *** Error code 1

    The problems are caused by clisp's usage of -fwrapv, where the
    developers implicitly assume this also makes pointer wrapping defined.

    After https://github.com/llvm/llvm-project/commit/1295aa2e814 however,
    -fwrapv no longer implies that, and you either have to add a clang
    specific -fwrapv-pointer option, or use -fno-strict-overflow, which
    works for both clang and gcc.

    PR:             292672
    Approved by:    maintainer timeout (2 weeks)
    MFH:            2026Q1

 lang/clisp/files/patch-src__makemake.in | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

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