Log message:
m4: remove unneeded patch

Fixed differently upstream

https://gitweb.git.savannah.gnu.org/gitweb/?p=gnulib.git;a=commitdiff;h=676177182056adb6424757ae8fd4d099d394795b

Log message:
m4: remove unneeded patch

fixed differently upstream

https://gitweb.git.savannah.gnu.org/gitweb/?p=gnulib.git;a=commitdiff;h=676177182056adb6424757ae8fd4d099d394795b

Log message:
m4: update to 1.4.21.

* Noteworthy changes in release 1.4.21 (2026-02-06) [stable]

** Fix the `eval' builtin to reject input like `0x' that C does not
   accept as an integer literal, rather than silently treating it as zero
   (present since "the beginning").

** Fix the `define' and `pushdef' builtins to always warn when attempting
   to concatenate the result of using the `defn' macro on a builtin macro
   with anything else.  This is a counterpart to the change in m4 1.4.11
   that issues a warning when `defn' with multiple arguments attempts to
   perform concatenation.  Attempting to use the output of `defn' anywhere
   other than a lone argument during macro definition has never been
   portable, but now the outcome is always the remaining text, rather
   than being dependent on whether `defn' was used before or after the
   other text (present since "the beginning").

** Port to glibc 2.43, which implements functions like strchr as macros
   when compiled with a C23 compiler.

* Noteworthy changes in release 1.4.20 (2025-05-10) [stable]

** Fix a bug in the `eval' builtin where it does not suppress warnings
   about division by zero that occurs within a more complex expression on
   the right hand side of || or && (present since short-circuiting was
   introduced in 1.4.8b).

** The `syscmd' and `esyscmd' builtins no longer mishandle a command line
   starting with `-' or `+' (present since "the beginning").

** Fix regression introduced in 1.4.19 where trace output (such as with
   `debugmode(t)') could read invalid memory when tracing a series of
   pushed macros that are popped during argument collection.

** Fix regression introduced in 1.4.19 where the `format' builtin
   inadvertently took on locale-dependent parsing and output of floating
   point numbers as a side-effect of introducing message translations.
   While it would be nice for m4 to be fully locale-aware, such a behavior
   change belongs in a major version release such as 1.6, and not a minor
   release.

** Fix regression introduced in 1.4.11 where the experimental `changeword'
   builtin could cause a crash if given a regex that does not match all
   one-byte prefixes of valid longer matches.  As a reminder, `changeword'
   is not recommended for production use, and will likely not be present
   in the next major version release.

** On non-Unix platforms where binary files differ from text, loading a
   frozen file (which should be cross-platform compatible) now correctly
   uses binary mode.

** Several documentation improvements to the manual.

** Update to comply with newer C standards, and inherit portability
   improvements from gnulib.

Log message:
m4: fix build w/ GCC 15

Log message:
m4: Fix build on UnixWare 7.

Log message:
m4: Improve macOS patch compatibility.

This should now work across all versions, and fix the build problem
raised in NetBSD/pkgsrc#158.  Tested locally against the 10.4 SDK.

From Jonathan Perkin <jperkin@smartos.org>
via drecklypkg commit 05d082ecd383bb9abfeebc219de0ff7ee50645c8

Log message:
devel/m4: Fix build on QNX

Log message:
Use older register names on MacOS X 10.4 "Tiger", taken from MacPorts