diff options
| -rw-r--r-- | acinclude.m4 | 67 |
1 files changed, 66 insertions, 1 deletions
diff --git a/acinclude.m4 b/acinclude.m4 index 127fc77905..338df76287 100644 --- a/acinclude.m4 +++ b/acinclude.m4 @@ -295,6 +295,34 @@ AC_DEFUN([AC_WIRESHARK_SOCKET_LIB_CHECK], ]) # +# AC_WIRESHARK_BREAKLOOP_TRY_LINK +# +AC_DEFUN([AC_WIRESHARK_PCAP_BREAKLOOP_TRY_LINK], +[ + AC_LINK_IFELSE( + [ + AC_LANG_SOURCE( + [[ +# include <pcap.h> + int main(void) + { + pcap_t *pct = NULL; + pcap_breakloop(pct); + return 0; + } + ]]) + ], + [ + ws_breakloop_compiled=yes + ], + [ + ws_breakloop_compiled=no + ]) +]) + + + +# # AC_WIRESHARK_PCAP_CHECK # AC_DEFUN([AC_WIRESHARK_PCAP_CHECK], @@ -437,7 +465,44 @@ and did you also install that package?]])) else AC_MSG_RESULT(no) fi - AC_CHECK_FUNCS(pcap_open_dead pcap_freecode pcap_breakloop) + AC_CHECK_FUNCS(pcap_open_dead pcap_freecode) + # + # pcap_breakloop may be present in the library and not declared in the + # header file. We are therefore testing whether the function is present + # first and then if it is usable. It is usable if it compiles without + # an implicit warning. If it is not usable, we output a warning telling + # the user to update his pcap header. + # + # Ceteris paribus, it should only happen with Mac OS X 10.3[.x] which + # can have an up-to-date pcap library without the corresponding pcap + # header. + # + # However, it might also happen on some others OSes with some erroneous + # system manipulations where multiple versions of libcap might co-exist + # e.g. hand made symbolic link from libpcap.so -> libpcap.so.0.8 but + # having the pcap header version 0.7. + # + AC_MSG_CHECKING([whether pcap_breakloop is present and usable]) + ac_CFLAGS_saved="$CFLAGS" + AC_WIRESHARK_PCAP_BREAKLOOP_TRY_LINK + if test "x$ws_breakloop_compiled" = "xyes"; then + CFLAGS="$CFLAGS -Werror -Wimplicit" + AC_WIRESHARK_PCAP_BREAKLOOP_TRY_LINK + if test "x$ws_breakloop_compiled" = "xyes"; then + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_PCAP_BREAKLOOP, 1, [Define if pcap_breakloop is known]) + else + AC_MSG_RESULT(broken) + AC_MSG_WARN([Your pcap library is more recent than your pcap header.]) + AC_MSG_WARN([Wireshark won't be able to use functions not declared]) + AC_MSG_WARN([in that header. You should install a newer version of]) + AC_MSG_WARN([the header file.]) + fi + CFLAGS="$ac_CFLAGS_saved" + else + AC_MSG_RESULT(function not present) + fi + # # 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, |