Remove TSRM_CHECK_GCC_ARG and LIBZEND_CPLUSPLUS_CHECKS

This removes two old Autoconf macro definitions since they are not used
anymore.

TSRM/tsrm.m4

@@ -1,27 +1,5 @@
 m4_include([TSRM/m4/ax_func_which_gethostbyname_r.m4])
 
-dnl TSRM_CHECK_GCC_ARG(ARG, ACTION-IF-FOUND, ACTION-IF-NOT_FOUND)
-AC_DEFUN([TSRM_CHECK_GCC_ARG],[
-  gcc_arg_name=[ac_cv_gcc_arg]translit($1,A-Z-,a-z_)
-  AC_CACHE_CHECK([whether $CC supports $1], [ac_cv_gcc_arg]translit($1,A-Z-,a-z_), [
-  echo 'void somefunc() { };' > conftest.c
-  cmd='$CC $1 -c conftest.c'
-  if eval $cmd 2>&1 | egrep -e $1 >/dev/null ; then
-    ac_result=no
-  else
-    ac_result=yes
-  fi
-  eval $gcc_arg_name=$ac_result
-  rm -f conftest.*
-  ])
-  if eval test "\$$gcc_arg_name" = "yes"; then
-    $2
-  else
-    :
-    $3
-  fi
-])
-
 AC_DEFUN([TSRM_BASIC_CHECKS],[
 
 AC_REQUIRE([AC_PROG_CC])dnl

UPGRADING.INTERNALS

@@ -179,7 +179,8 @@ PHP 7.3 INTERNALS UPGRADE NOTES
 ========================
 
   a. Unix build system changes
-    - PHP_PROG_LEX macro has been removed.
+    - PHP_PROG_LEX, TSRM_CHECK_GCC_ARG, and LIBZEND_CPLUSPLUS_CHECKS Autoconf
+      macros have been removed.
 
   b. Windows build system changes
     - ZEND_WIN32_FORCE_INLINE doesn't affect C++ anymore. zend_always_inline is

Zend/Zend.m4

@@ -192,7 +192,6 @@ test -n "$DEBUG_CFLAGS" && CFLAGS="$CFLAGS $DEBUG_CFLAGS"
 if test "$ZEND_MAINTAINER_ZTS" = "yes"; then
   AC_DEFINE(ZTS,1,[ ])
   CFLAGS="$CFLAGS -DZTS"
-  LIBZEND_CPLUSPLUS_CHECKS
 fi
 
 changequote({,})
@@ -388,10 +387,6 @@ AC_MSG_RESULT($ZEND_SIGNALS)
 
 ])
 
-AC_DEFUN([LIBZEND_CPLUSPLUS_CHECKS],[
-
-])
-
 AC_MSG_CHECKING(whether /dev/urandom exists)
 if test -r "/dev/urandom" && test -c "/dev/urandom"; then
   AC_DEFINE([HAVE_DEV_URANDOM], 1, [Define if the target system has /dev/urandom device])

acinclude.m4

@@ -283,7 +283,6 @@ dnl If successful, adds -rdynamic to PHP_LDFLAGS.
 dnl
 AC_DEFUN([PHP_TARGET_RDYNAMIC],[
   if test -n "$GCC"; then
-    dnl we should use a PHP-specific macro here
     PHP_CHECK_GCC_ARG(-rdynamic, gcc_rdynamic=yes)
     if test "$gcc_rdynamic" = "yes"; then
       PHP_LDFLAGS="$PHP_LDFLAGS -rdynamic"