php8.2 build error: implicit declaration of function ‘memrchr’; did you mean ‘memchr’

[scramatte]

Hello,

I'm trying to build pthreads with php8.2 on debian 11 I've got a working php8.2 zts enabled version installed on the server.

root@sandbox-debian11:/usr/src/pthreads# php -r "echo PHP_ZTS;"
1

root@sandbox-debian11:/usr/src/pthreads# make
/bin/bash /usr/src/pthreads/libtool --mode=compile cc -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1 -Werror=implicit-function-declaration -I. -I/usr/src/pthreads -DPHP_ATOM_INC -I/usr/src/pthreads/include -I/usr/src/pthreads/main -I/usr/src/pthreads -I/usr/include/php/20220829 -I/usr/include/php/20220829/main -I/usr/include/php/20220829/TSRM -I/usr/include/php/20220829/Zend -I/usr/include/php/20220829/ext -I/usr/include/php/20220829/ext/date/lib -I/usr/src/pthreads/.  -DHAVE_CONFIG_H  -g -O2   -c /usr/src/pthreads/php_pthreads.c -o php_pthreads.lo 
mkdir .libs
 cc -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1 -Werror=implicit-function-declaration -I. -I/usr/src/pthreads -DPHP_ATOM_INC -I/usr/src/pthreads/include -I/usr/src/pthreads/main -I/usr/src/pthreads -I/usr/include/php/20220829 -I/usr/include/php/20220829/main -I/usr/include/php/20220829/TSRM -I/usr/include/php/20220829/Zend -I/usr/include/php/20220829/ext -I/usr/include/php/20220829/ext/date/lib -I/usr/src/pthreads/. -DHAVE_CONFIG_H -g -O2 -c /usr/src/pthreads/php_pthreads.c  -fPIC -DPIC -o .libs/php_pthreads.o
In file included from /usr/include/php/20220829/Zend/zend.h:409,
                 from /usr/include/php/20220829/main/php.h:31,
                 from ./src/pthreads.h:39,
                 from /usr/src/pthreads/php_pthreads.c:19:
/usr/include/php/20220829/Zend/zend_operators.h: In function ‘zend_memrchr’:
/usr/include/php/20220829/Zend/zend_operators.h:205:22: error: implicit declaration of function ‘memrchr’; did you mean ‘memchr’? [-Werror=implicit-function-declaration]
  205 |  return (const void*)memrchr(s, c, n);
      |                      ^~~~~~~
      |                      memchr
/usr/include/php/20220829/Zend/zend_operators.h:205:9: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
  205 |  return (const void*)memrchr(s, c, n);
      |         ^
cc1: some warnings being treated as errors
make: *** [Makefile:194: php_pthreads.lo] Error 1
root@sandbox-debian11:/usr/src/pthreads# 

Any idea of what occurs here?

[dktapps]

Hi, this doesn't look like a pthreads error at all. It's coming from some random header included from the generic php.h.

[scramatte]

I've rebuilt php 8.2.4 with ZTS from sury debian packages. It looks that is required to add "-D_GNU_SOURCE" but I don't know how where

Regards

[scramatte]

I've edit Makefile and I add "-D_GNU_SOURCE" to "DEFS" and finally I've been able to build module.

DEFS = -DPHP_ATOM_INC -D_GNU_SOURCE -I$(top_builddir)/include -I$(top_builddir)/main -I$(top_srcdir)

It would be nice to take in count this issue to have seamless compilation process everywhere.

[dktapps]

As I said, this isn't a pthreads issue.