www.pudn.com > libxml2.rar > acinclude.m4

dnl Like AC_TRY_EVAL but also errors out if the compiler generates
dnl _any_ output. Some compilers might issue warnings which we want
dnl to catch.
AC_DEFUN(AC_TRY_EVAL2,
[{ (eval echo configure:__oline__: \"[$]$1\") 1>&AC_FD_CC; dnl
(eval [$]$1) 2>&AC_FD_CC; _out=`eval [$]$1 2>&1` && test "x$_out" = x; }])

dnl Like AC_TRY_COMPILE but calls AC_TRY_EVAL2 instead of AC_TRY_EVAL
AC_DEFUN(AC_TRY_COMPILE2,
[cat > conftest.$ac_ext <&AC_FD_CC
  cat conftest.$ac_ext >&AC_FD_CC
ifelse([$4], , , [  rm -rf conftest*
  $4
])dnl
fi
rm -f conftest*])