| 422 |
|
dnl (end of code from openssh-3.2.2p1 configure.ac) |
| 423 |
|
|
| 424 |
|
|
| 425 |
+ |
dnl Check for systems where POSIX-style non-blocking I/O (O_NONBLOCK) |
| 426 |
+ |
dnl doesn't work or is unimplemented. On these systems (mostly older |
| 427 |
+ |
dnl ones), use the old BSD-style FIONBIO approach instead. [tcl.m4] |
| 428 |
+ |
AC_CACHE_CHECK([FIONBIO vs. O_NONBLOCK for non-blocking I/O], |
| 429 |
+ |
ac_cv_nonblocking_io, [ |
| 430 |
+ |
case "$host" in |
| 431 |
+ |
*-*-osf*) |
| 432 |
+ |
ac_cv_nonblocking_io=FIONBIO |
| 433 |
+ |
;; |
| 434 |
+ |
*-*-sunos4*) |
| 435 |
+ |
ac_cv_nonblocking_io=FIONBIO |
| 436 |
+ |
;; |
| 437 |
+ |
*-*-ultrix*) |
| 438 |
+ |
ac_cv_nonblocking_io=FIONBIO |
| 439 |
+ |
;; |
| 440 |
+ |
*) |
| 441 |
+ |
ac_cv_nonblocking_io=O_NONBLOCK |
| 442 |
+ |
;; |
| 443 |
+ |
esac |
| 444 |
+ |
]) |
| 445 |
+ |
if [[ "$ac_cv_nonblocking_io" = "FIONBIO" ]]; then |
| 446 |
+ |
AC_DEFINE(USE_FIONBIO, 1, [Define if BSD-style non-blocking I/O is to be used]) |
| 447 |
+ |
fi |
| 448 |
+ |
|
| 449 |
+ |
dnl Check whether compiler supports byte bit-fields |
| 450 |
+ |
AC_CACHE_CHECK([whether compiler supports byte bit-fields], |
| 451 |
+ |
ac_cv_have_byte_bitfields, [ |
| 452 |
+ |
AC_LANG_SAVE |
| 453 |
+ |
AC_LANG_CPLUSPLUS |
| 454 |
+ |
AC_TRY_RUN([ |
| 455 |
+ |
struct A { |
| 456 |
+ |
unsigned char b1:4; |
| 457 |
+ |
unsigned char b2:4; |
| 458 |
+ |
unsigned char c; |
| 459 |
+ |
unsigned short s; |
| 460 |
+ |
unsigned char a[4]; |
| 461 |
+ |
}; |
| 462 |
+ |
|
| 463 |
+ |
int main(void) { |
| 464 |
+ |
A a; |
| 465 |
+ |
return ! (sizeof(A) == 8 && &a.c == ((unsigned char *)&a + 1)); |
| 466 |
+ |
}], |
| 467 |
+ |
[ac_cv_have_byte_bitfields=yes], |
| 468 |
+ |
[ac_cv_have_byte_bitfields=no], |
| 469 |
+ |
dnl When cross-compiling, assume only GCC supports this |
| 470 |
+ |
[if [[ "$GCC" = "yes" ]]; then |
| 471 |
+ |
ac_cv_have_byte_bitfields="guessing yes" |
| 472 |
+ |
else |
| 473 |
+ |
ac_cv_have_byte_bitfields="guessing no" |
| 474 |
+ |
fi] |
| 475 |
+ |
) |
| 476 |
+ |
AC_LANG_RESTORE |
| 477 |
+ |
]) |
| 478 |
+ |
|
| 479 |
|
dnl AC_CHECK_FRAMEWORK($1=NAME, $2=INCLUDES) |
| 480 |
|
AC_DEFUN([AC_CHECK_FRAMEWORK], [ |
| 481 |
|
AS_VAR_PUSHDEF([ac_Framework], [ac_cv_framework_$1])dnl |
| 545 |
|
DEFINES="$DEFINES -DBSD_COMP -D_POSIX_PTHREAD_SEMANTICS" |
| 546 |
|
;; |
| 547 |
|
irix*) |
| 494 |
– |
ETHERSRC=ether_unix.cpp |
| 548 |
|
AUDIOSRC=Irix/audio_irix.cpp |
| 549 |
|
EXTRASYSSRCS=Irix/unaligned.c |
| 550 |
|
LIBS="$LIBS -laudio" |
| 577 |
|
esac |
| 578 |
|
|
| 579 |
|
dnl Is the slirp library supported? |
| 580 |
< |
if [[ "x$ETHERSRC" = "xether_unix.cpp" ]]; then |
| 580 |
> |
case "$ac_cv_have_byte_bitfields" in |
| 581 |
> |
yes|"guessing yes") |
| 582 |
> |
CAN_SLIRP=yes |
| 583 |
> |
ETHERSRC=ether_unix.cpp |
| 584 |
> |
;; |
| 585 |
> |
esac |
| 586 |
> |
if [[ -n "$CAN_SLIRP" ]]; then |
| 587 |
|
AC_DEFINE(HAVE_SLIRP, 1, [Define if slirp library is supported]) |
| 588 |
|
SLIRP_SRCS="\ |
| 589 |
|
../slirp/bootp.c ../slirp/ip_output.c ../slirp/tcp_input.c \ |
| 1096 |
|
dnl A dummy program that returns always true |
| 1097 |
|
AC_PATH_PROG([BLESS], "true") |
| 1098 |
|
|
| 1099 |
+ |
dnl Check for linker script support |
| 1100 |
+ |
case $target_os:$target_cpu in |
| 1101 |
+ |
linux*:i?86) LINKER_SCRIPT_FLAGS="-Wl,-T,ldscripts/linux-i386.ld";; |
| 1102 |
+ |
linux*:x86_64) LINKER_SCRIPT_FLAGS="-Wl,-T,ldscripts/linux-x86_64.ld";; |
| 1103 |
+ |
esac |
| 1104 |
+ |
if [[ -n "$LINKER_SCRIPT_FLAGS" ]]; then |
| 1105 |
+ |
AC_CACHE_CHECK([whether linker script is usable], |
| 1106 |
+ |
ac_cv_linker_script_works, [ |
| 1107 |
+ |
AC_LANG_SAVE |
| 1108 |
+ |
AC_LANG_CPLUSPLUS |
| 1109 |
+ |
saved_LDFLAGS="$LDFLAGS" |
| 1110 |
+ |
LDFLAGS="$LDFLAGS $LINKER_SCRIPT_FLAGS" |
| 1111 |
+ |
AC_TRY_RUN( |
| 1112 |
+ |
[int main() {if ((char *)&main < (char *)0x70000000) return 1;}], |
| 1113 |
+ |
[ac_cv_linker_script_works=yes], |
| 1114 |
+ |
[ac_cv_linker_script_works=no], |
| 1115 |
+ |
dnl When cross-compiling, assume it works |
| 1116 |
+ |
[ac_cv_linker_script_works="guessing yes"] |
| 1117 |
+ |
) |
| 1118 |
+ |
AC_LANG_RESTORE |
| 1119 |
+ |
if [[ "$ac_cv_linker_script_works" = "no" ]]; then |
| 1120 |
+ |
LDFLAGS="$saved_LDFLAGS" |
| 1121 |
+ |
LINKER_SCRIPT_FLAGS="" |
| 1122 |
+ |
fi |
| 1123 |
+ |
]) |
| 1124 |
+ |
fi |
| 1125 |
+ |
AC_TRANSLATE_DEFINE(HAVE_LINKER_SCRIPT, "$ac_cv_linker_script_works", |
| 1126 |
+ |
[Define if there is a linker script to relocate the executable above 0x70000000.]) |
| 1127 |
+ |
|
| 1128 |
|
dnl Determine the addressing mode to use |
| 1129 |
|
if [[ "x$WANT_NATIVE_M68K" = "xyes" ]]; then |
| 1130 |
|
ADDRESSING_MODE="real" |
