| 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__: \"[$]$1\") 1>&AS_MESSAGE_LOG_FD; dnl | |
| (eval [$]$1) 2>&AS_MESSAGE_LOG_FD; _out=`eval [$]$1 2>&1` && test "x$_out" = x; }]) | |
| dnl Like AC_TRY_COMPILE but calls AC_TRY_EVAL2 instead of AC_TRY_EVAL | |
| AC_DEFUN([AC_TRY_COMPILE2], | |
| [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([$4], , , [ rm -rf conftest* | |
| $4 | |
| ])dnl | |
| fi | |
| rm -f conftest*]) |