Build fails on 32-bit Linux and FreeBSD with Clang

Description

The following code:

./buildconf
./configure
make

Resulted in this output on FreeBSD 14 32-bit with Clang 16.0.6 (default compiler selected by the system):

ld: error: relocation R_386_32 cannot be used against local symbol; recompile with -fPIC
>>> defined in ext/opcache/.libs/zend_accelerator_debug.o
>>> referenced by zend_accelerator_debug.c:58 (ext/opcache/zend_accelerator_debug.c:58)
>>>               ext/opcache/.libs/zend_accelerator_debug.o:(zend_accel_error_va_args)

make: stopped in .../php-src

But I expected this output instead:

# builds successfullly

On Debian 32-bit with Clang this happens:

ext/standard/base64.o: unsupported non-PIC call to IFUNC `php_base64_encode_ex'
/usr/bin/ld: failed to set dynamic section sizes: bad value
/usr/bin/ld: /usr/bin/ld: ext/standard/base64.o: unsupported non-PIC call to IFUNC `ext/standard/base64.ophp_base64_encode_ex: unsupported non-PIC call to IFUNC `'php_base64_encode_ex

When using GCC it works ok. Issue is that there is a check to disable PIC mode for shared extensions on 32-bit Linux and FreeBSD: https://github.com/php/php-src/blob/bbbe56eecc6ff6b3971ba4f924d51c9aa11955c5/configure.ac#L242-L257

(Probably solution would be to skip the non-PIC mode for Clang on 32-bit)

PHP Version

PHP 8.2, 8.3 and 8.4-dev

Operating System

32-bit Linux and FreeBSD

使用 Clang 在 32 位 Linux 或 FreeBSD 上通过 ./buildconf、./configure 和 make 重现该失败。首先检查 configure.ac 的第 242-257 行附近，以及受影响的 ext/opcache 和 ext/standard 构建输出。当 PHP 源代码能够在报告的 32 位系统上使用 Clang 成功构建，且没有 relocation 或 non-PIC 错误时，即表示完成。