Merge branch 'PHP-7.4'

* PHP-7.4:
  Remove AC_PROG_CC_C_O

diff --cc configure.ac
index df31490bd1f1e0499dfbd95de65dd4ef76e4cee3,6b0a24addc8f9689fe9c9b2c267b0163bbec79a3..0772da5b6d4dfd85a61dfa263d75922ba587a230
--- 1/configure.ac
--- 2/configure.ac
+++ b/configure.ac
@@@ -176,8 -176,8 +176,7 @@@ PKG_PROG_PKG_CONFI
  AC_PROG_CC([cc gcc])
  PHP_DETECT_ICC
  PHP_DETECT_SUNCC
- AC_PROG_CC_C_O
 -dnl Change to AC_PROG_CC_STDC when we start requiring a post-2.13 autoconf
 -dnl AC_PROG_CC_STDC
 +AC_PROG_CC_C99
  AC_PROG_CPP
  AC_USE_SYSTEM_EXTENSIONS
  AC_PROG_LN_S