diff -ur php7-source.orig/build/php.m4 php7-source/build/php.m4

--- php7-source.orig/build/php.m4	2020-06-09 13:57:09.000000000 +0300

+++ php7-source/build/php.m4	2020-07-10 09:50:17.753222636 +0300

@@ -754,14 +754,7 @@

 dnl

 dnl PHP_REQUIRE_CXX

 dnl

-AC_DEFUN([PHP_REQUIRE_CXX],[

-  if test -z "$php_cxx_done"; then

-    AC_PROG_CXX

-    AC_PROG_CXXCPP

-    PHP_ADD_LIBRARY(stdc++)

-    php_cxx_done=yes

-  fi

-])

+AC_DEFUN([PHP_REQUIRE_CXX])

 dnl

 dnl PHP_BUILD_SHARED

Только в php7-source/build: php.m4~