diff options
| -rw-r--r-- | acinclude.m4 | 54 |
1 files changed, 51 insertions, 3 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index 0c425681a4..d6726b016b 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -419,9 +419,57 @@ and did you also install that package?]])) else AC_MSG_RESULT(no) fi - AC_CHECK_FUNCS(pcap_findalldevs pcap_lib_version pcap_open_dead) - AC_CHECK_FUNCS(pcap_datalink_val_to_name pcap_datalink_name_to_val) - AC_CHECK_FUNCS(pcap_list_datalinks pcap_set_datalink) + AC_CHECK_FUNCS(pcap_open_dead) + # + # Later versions of Mac OS X 10.3[.x] ship a pcap.h that + # doesn't define pcap_if_t but ship an 0.8[.x] libpcap, + # so the library has "pcap_findalldevs()", but pcap.h + # doesn't define "pcap_if_t" so you can't actually *use* + # "pcap_findalldevs()". + # + # That even appears to be true of systems shipped with + # 10.3.4, so it doesn't appear only to be a case of + # Software Update not updating header files. + # + # (You can work around this by installing the 0.8 header + # files.) + # + AC_CACHE_CHECK([whether pcap_findalldevs is present and usable], + [ac_cv_func_pcap_findalldevs], + [ + AC_LINK_IFELSE( + [ + AC_LANG_SOURCE( + [[ + #include <pcap.h> + main() + { + pcap_if_t *devpointer; + char errbuf[1]; + + pcap_findalldevs(&devpointer, errbuf); + } + ]]) + ], + [ + ac_cv_func_pcap_findalldevs=yes + ], + [ + ac_cv_func_pcap_findalldevs=no + ]) + ]) + # + # Don't check for other new routines that showed up after + # "pcap_findalldevs()" if we don't have a usable + # "pcap_findalldevs()", so we don't end up using them if the + # "pcap.h" is crufty and old and doesn't declare them. + # + if test $ac_cv_func_pcap_findalldevs = "yes" ; then + AC_DEFINE(HAVE_PCAP_FINDALLDEVS, 1, + [Define to 1 if you have the `pcap_findalldevs' function and a pcap.h that declares pcap_if_t.']) + AC_CHECK_FUNCS(pcap_datalink_val_to_name pcap_datalink_name_to_val) + AC_CHECK_FUNCS(pcap_list_datalinks pcap_set_datalink pcap_lib_version) + fi LIBS="$ac_save_LIBS" ]) |