Re: SIGSEGV signal on Darwin OS X (Intel) when using version matching (nmap 4.01)

["Kurt Grutzmacher" <grutz () jingojango net>]

On 3/10/06, Fyodor <fyodor () insecure org> wrote:
> Great!  If this is related to a coding problem in Nmap or one if its
> libraries, then it would be best to fix that underlying issue.  One
> the other hand, it may be a bug in this gcc optimization, at least on
> that platform.  So unless anyone has ideas about changes to Nmap or
> its libraries to resolve this, the best approach may be adding
> -fno-thread-jumps on the X86 Apple platform.  Do you think you could
> send a patch to the configure.ac files which adds that flag?


This seemed to work well. libpcre doesn't seem to use CXXFLAGS so it's just
appended to CFLAGS and the AC_CANNONICAL_HOST macro comes back as
i386-apple-darwin8 for some strange reason. Otherwise right as rain:

--- ../nmap-4.02Alpha2.orig/libpcre/configure.ac        2006-03-10 12:48:
34.000000000 -0800
+++ libpcre/configure.ac        2006-03-10 12:49:33.000000000 -0800
@@ -169,6 +169,18 @@
   UTF8=-DSUPPORT_UTF8
 fi

+dnl MacOSX on Intel Hack to remove thread-jumps
+AC_CANONICAL_HOST
+
+case "$host" in
+  i386-apple-darwin*)
+     macosx=yes
+     AC_DEFINE(MACOSX)
+     needs_cpp_precomp=yes
+     CFLAGS="$CFLAGS -fno-thread-jumps"
+     ;;
+esac
+
 dnl "Export" these variables

 AC_SUBST(BUILD_EXEEXT)
@@ -191,6 +203,7 @@
 AC_SUBST(POSIX_MALLOC_THRESHOLD)
 AC_SUBST(UCP)
 AC_SUBST(UTF8)
+AC_SUBST(CFLAGS)

 AC_SUBST(POSIX_OBJ)
 AC_SUBST(POSIX_LOBJ)


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