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Check whether compiler supports byte bit-fields. If so, we can enable slirp

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emulation code since it pure C+sockets code.
This commit is contained in:
gbeauche 2006-01-27 23:41:43 +00:00
parent e9e3ad9a4b
commit 9d984b3b34
1 changed files with 34 additions and 1 deletions
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35
BasiliskII/src/Unix/configure.ac
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@ -446,6 +446,35 @@ if [[ "$ac_cv_nonblocking_io" = "FIONBIO" ]]; then
AC_DEFINE(USE_FIONBIO, 1, [Define if BSD-style non-blocking I/O is to be used])
fi
dnl Check whether compiler supports byte bit-fields
AC_CACHE_CHECK([whether compiler supports byte bit-fields],
ac_cv_have_byte_bitfields, [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_RUN([
struct A {
unsigned char b1:4;
unsigned char b2:4;
unsigned char c;
unsigned short s;
unsigned char a[4];
};
int main(void) {
A a;
return ! (sizeof(A) == 8 && &a.c == ((unsigned char *)&a + 1));
}],
[ac_cv_have_byte_bitfields=yes],
[ac_cv_have_byte_bitfields=no],
dnl When cross-compiling, assume only GCC supports this
[if [[ "$GCC" = "yes" ]]; then
ac_cv_have_byte_bitfields="guessing yes"
else
ac_cv_have_byte_bitfields="guessing no"
fi]
)
AC_LANG_RESTORE
])
dnl AC_CHECK_FRAMEWORK($1=NAME, $2=INCLUDES)
AC_DEFUN([AC_CHECK_FRAMEWORK], [
@ -516,7 +545,6 @@ solaris*)
DEFINES="$DEFINES -DBSD_COMP -D_POSIX_PTHREAD_SEMANTICS"
;;
irix*)
ETHERSRC=ether_unix.cpp
AUDIOSRC=Irix/audio_irix.cpp
EXTRASYSSRCS=Irix/unaligned.c
LIBS="$LIBS -laudio"
@ -549,6 +577,11 @@ cygwin*)
esac
dnl Is the slirp library supported?
case "$ac_cv_have_byte_bitfields" in
yes|"guessing yes")
ETHERSRC=ether_unix.cpp
;;
esac
if [[ "x$ETHERSRC" = "xether_unix.cpp" ]]; then
AC_DEFINE(HAVE_SLIRP, 1, [Define if slirp library is supported])
SLIRP_SRCS="\