The `<stdio.h>` header file is part of the standard C89 headers [1]
and on current systems can be included unconditionally.
Since PHP requires at least C89 or greater, the `HAVE_STDIO_H` symbol
defined by Autoconf [2] can be ommitted and simplifed.
Refs:
[1] https://port70.net/~nsz/c/c89/c89-draft.html#4.1.2
[2] https://git.savannah.gnu.org/cgit/autoconf.git/tree/lib/autoconf/headers.m4
-#define HAVE_STDIO_H 1
#define HAVE_MEMORY_H 1
/* #undef HAVE_STRINGS_H */
#define HAVE_STRING_H 1
AC_SEARCH_LIBS(socket, socket)
AC_SEARCH_LIBS(inet_addr, nsl)
- AC_CHECK_HEADERS([fcntl.h stdio.h unistd.h sys/uio.h])
+ AC_CHECK_HEADERS([fcntl.h unistd.h sys/uio.h])
AC_CHECK_HEADERS([sys/select.h sys/socket.h sys/time.h])
AC_CHECK_HEADERS([arpa/inet.h netinet/in.h])
AC_CHECK_HEADERS([sysexits.h])