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The `<assert.h>` header file is part of the standard C89 headers [1] and on older systems there needed to be also a manual check if header is present. Since PHP requires at least C89 manual check and the `HAVE_ASSERT_H` symbol defined by Autoconf in configure.ac can be both removed [2]. This patch also removes unused <assert.h> includes where c files don't use the `assert()` macro. Refs: [1] https://port70.net/~nsz/c/c89/c89-draft.html#4.2 [2] https://git.savannah.gnu.org/cgit/autoconf.git/tree/lib/autoconf/headers.m4
This is libmbfl, a streamable multibyte character code filter and converter library. The original version of libmbfl is developed and distributed at https://github.com/moriyoshi/libmbfl under the LGPL 2.1 license. The libmbfl library is bundled with PHP as a fork of the original repository and is not in sync with the upstream at https://github.com/moriyoshi/libmbfl. As such, the libmbfl directory is directly modified in the php-src repository. See LICENSE and DISCLAIMER for licensing information.