Description:
------------
php 5.3.x requires ANSIC 99 compliant complier options. php configure 
options can check for this and enable this option accordingly

Reproduce code:
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if we try compile php 5.3.x on gcc 2.96 or other compilers which do not enable ansi c 99 standard and its extensions by default, php build will fail. this is because php now includes such extensions internally.

for example, within configure.in , we could add the following macro
AC_PROG_CC_C99

to ensure that the compiler can support ansi c 99 standard. 

(need to check if this macro is available in autoconf 2.13 - the officially supported macro for php 5.3)

Expected result:
----------------
build passes successfully or fails at the configure state

Actual result:
--------------
configure passes successfully and fails while compiling some programs 
causing confusion to the customers