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Building for 32-bit x86 with clang (tested: clang 21.1.8, `-m32`) fails to link: ``` ld: ext/mbstring/mbstring.o: unsupported non-PIC call to IFUNC `mb_fast_check_utf8' ``` clang calls an ifunc defined in the same translation unit directly (`R_386_PC32`) instead of through the PLT, which the linker rejects for PIE output. `php_addslashes` and `php_base64_*` are affected the same way. Such calls exist since PHP 7.3. Fix: don't use ifunc resolvers with clang on i386, falling back to the existing function-pointer dispatch. GCC and x86-64 are unchanged.
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Building for 32-bit x86 with clang (tested: clang 21.1.8,
-m32) fails to link:clang calls an ifunc defined in the same translation unit directly (
R_386_PC32) instead of through the PLT, which the linker rejects for PIE output.php_addslashesandphp_base64_*are affected the same way. Such calls exist since PHP 7.3.Fix: don't use ifunc resolvers with clang on i386, falling back to the existing function-pointer dispatch. GCC and x86-64 are unchanged.