GNU implementation of the traditional m4 Unix macro processor.
Mostly SVR4 compatible with some extensions (for example, handling more than
9 positional macro parameters), also has built-in functions for including
files, running shell commands, doing arithmetic, and so on.
For more information see the project home pages:
https://savannah.gnu.org/projects/m4/
https://www.gnu.org/software/m4/
The following packages have been upgraded in the Cygwin distribution:
- m4 1.4.21
For changes since the previous Cygwin release, see below or read
/usr/share/doc/m4/NEWS after installation; for complete details see:
https://lists.gnu.org/archive/html/m4-announce/2026-02/msg00000.html
/usr/share/doc/m4/ChangeLog
https://cgit.git.savannah.gnu.org/cgit/m4.git/log/?h=v1.4.21
2026-02-06 1.4.21
- 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.
--
*** CYGWIN-ANNOUNCE UNSUBSCRIBE INFO ***
The easiest way to unsubscribe is to visit
<https://cygwin.com/mailman/options/cygwin-announce>, and click 'Unsubscribe'.
If you need more information on unsubscribing, start reading here:
<https://sourceware.org/lists.html#unsubscribe>.
