Build Error MacOS 11.6 x86_64

[m.tanay]

When trying to build from source I encountered the following errors:

1. ../src/build/libgnuregex/regex.c:4924:5: error: implicit declaration of function 'free' is

invalid in C99 [-Werror,-Wimplicit-function-declaration]

free (preg->buffer);

2. ../src/build/libgnuregex/regex.c:2784:11: error: implicitly declaring library function

'abort' with type 'void (void) attribute((noreturn))' [-Werror,-Wimplicit-function-declaration]

abort (); /* We have listed all the cases. */

Both the errors were in this file: ​https://github.com/haiku/haiku/blob/master/src/build/libgnuregex/regex.c

Possible Fix: I got the error resolved by replacing lines 66-71 in the above file with "#include <stdlib.h>" STDC_HEADERS is not needed as per the following article: ​https://www.gnu.org/software/autoconf/manual/autoconf-2.67/html_node/Particular-Headers.html

I would like to submit a patch if this bug is confirmed and my solution is accepted. Thank you

[alistairmcmillan]

In my own testing ​this patch fixes this build error on macOS.

[korli]

Applied in hrev56025