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(, [{ (eval echo configure:__oline__: "[$]$1") 1>&AS_MESSAGE_LOG_FD; dnl (eval [$]$1) 2>&AS_MESSAGE_LOG_FD; _out=`eval [$]$1 2>&1` && test “x$_out” = x; }])

dnl Like AC_TRY_COMPILE but calls AC_TRY_EVAL2 instead of AC_TRY_EVAL AC_DEFUN(, [cat > conftest.$ac_ext <<EOF [#]line __oline__ “configure” include “confdefs.h”

$1

int main(void) {

$2

; return 0; } EOF if AC_TRY_EVAL2(ac_compile); then

ifelse([$3], , :, [rm -rf conftest*
$3])

else

echo "configure: failed program was:" >&AS_MESSAGE_LOG_FD
cat conftest.$ac_ext >&AS_MESSAGE_LOG_FD

ifelse(, , , [ rm -rf conftest*

$4

])dnl fi rm -f conftest*])