Autoconf 2.50 in 2001 made several macros obsolete. These include also macros for temporary changing the language. Instead of these the AC_LANG_PUSH and AC_LANG_POP macros should be used with later Autoconf versions.
Since PHP 5.4 to 7.1 require to have Autoconf 2.59+ and PHP 7.2 and later require Autoconf 2.64+ the upgrade is fairly safe and most systems should already be supported.
petk
commented
6 years ago
Hello,
Autoconf 2.50 in 2001 made several macros obsolete. These include also macros for temporary changing the language. Instead of these the
AC_LANG_PUSHandAC_LANG_POPmacros should be used with later Autoconf versions.Since PHP 5.4 to 7.1 require to have Autoconf 2.59+ and PHP 7.2 and later require Autoconf 2.64+ the upgrade is fairly safe and most systems should already be supported.
Refs:
Thanks.