1 dnl Like AC_TRY_EVAL but also errors out if the compiler generates
2 dnl _any_ output. Some compilers might issue warnings which we want
4 AC_DEFUN([AC_TRY_EVAL2],
5 [{ (eval echo configure:__oline__: \"[$]$1\") 1>&AC_FD_CC; dnl
6 (eval [$]$1) 2>&AC_FD_CC; _out=`eval [$]$1 2>&1` && test "x$_out" = x; }])
8 dnl Like AC_TRY_COMPILE but calls AC_TRY_EVAL2 instead of AC_TRY_EVAL
9 AC_DEFUN([AC_TRY_COMPILE2],
10 [cat > conftest.$ac_ext <<EOF
11 [#]line __oline__ "configure"
18 if AC_TRY_EVAL2(ac_compile); then
19 ifelse([$3], , :, [rm -rf conftest*
22 echo "configure: failed program was:" >&AC_FD_CC
23 cat conftest.$ac_ext >&AC_FD_CC
24 ifelse([$4], , , [ rm -rf conftest*