Re: c99

[vishnu]

On Sat, Oct 13, 2001 at 09:07:54PM +0200, Guido Draheim wrote:
> make a macro (after AC_PROG_CC) that includes a check  like
> TESTC99DECLARATIONS
> if notOK and test $GCC = yes ::
>   save_CFLAGS="$CFLAGS"
>   CFLAGS="$CFLAGS -std=gnu99"
>   TESTC99DECLARATIONS
>   if stillnotOK ::
>     CFLAGS=save_CFLAGS ; echo BAD (or bail out)
>   else
>     echo "OK (with -std=gnu99)"
>   fi
> else
>   echo BAD (or bail out)
> fi

Is this stylistically acceptable?

define(TEST_C99_DECL, AC_TRY_COMPILE([],[
  int x=0; x+=1; int y=0;
  for (int z=0; z < 2; z++);
],[C99=yes],[C99=no]))

AC_MSG_CHECKING([whether $CC accepts C99 declarations])
TEST_C99_DECL
if test $C99 = no -a $GCC = yes; then
  save_CFLAGS="$CFLAGS"
  CFLAGS="$CFLAGS -std=gnu99"
  TEST_C99_DECL
  if test $C99 = no; then
    CFLAGS="$save_CFLAGS"
  else
    C99_COMMENT=', with -std=gnu99'
  fi
fi

if test $C99 = yes; then
  echo "yes$C99_COMMENT"
else
  AC_MSG_RESULT(no)
  AC_MSG_ERROR([
*** This package requires a C compiler with C99 support.  Please
*** consider trying a recent release of GCC.])
]  fi
fi

-- 
Victory to the Divine Mother!!
  http://sahajayoga.org