stacktrace, exec amd sys/mman.h are not available in windows

configure.ac

@@ -59,10 +59,11 @@ AC_ARG_ENABLE(dir,
               AS_HELP_STRING([--disable-dir], [disable POSIX directory access]),
               [have_dir="$enableval"])
 AM_CONDITIONAL(HAVE_DIR, test "$have_dir" = "yes")
-AC_ARG_ENABLE(exec,
+AC_ARG_ENABLE(exec,  
               AS_HELP_STRING([--disable-exec],
                              [disable UNIX fork and execute with pipes]),
-              [have_exec="$enableval"])
+              [have_exec="$enableval"],
+              [if "$MINGW" = "1"; then have_exec="no"; else have_exec="yes"; fi])
 AM_CONDITIONAL(HAVE_EXEC, test "$have_exec" = "yes")
 AC_ARG_ENABLE(regexp,
               AS_HELP_STRING([--disable-regexp],
@@ -86,7 +87,8 @@ AC_ARG_ENABLE(dynamicstack,
 AC_ARG_ENABLE(stacktrace,
               AS_HELP_STRING([--disable-stacktrace],
                              [disable stack trace, use this if you cannot compile the library on your system otherwise and you still want to use the other parts]),
-              [have_stacktrace="$enableval"], [have_stacktrace="yes"])
+              [have_stacktrace="$enableval"],
+              [if "$MINGW" = "1"; then have_stacktrace="no"; else have_stacktrace="yes"; fi])
 AM_CONDITIONAL(HAVE_STACKTRACE, test "$have_stacktrace" = "yes")
 if test "$have_stacktrace" = "yes"; then
   # Hack for bug:
@@ -169,8 +171,9 @@ AM_CONDITIONAL(HAVE_BOOST_THREAD, test -n "$BOOST_THREAD_LIB")
 # special dependencies for specific distros
 AX_ALL_BUILD_DEPEND_DEV(binutils)
 AX_ALL_DEPEND_IFEXISTS_DEV(libiberty)
+AX_ALL_DEPEND_IFEXISTS_DEV(liblog4cxx)
+AX_ALL_DEPEND_IFEXISTS_DEV(liblog4cxx10)
 AX_DEB_BUILD_DEPEND(libboost-dev)
-AX_DEB_BUILD_DEPEND(liblog4cxx-dev)
 AX_DEB_BUILD_DEPEND(libz-dev)
 AX_RPM_BUILD_DEPEND(boost-devel)
 AX_RPM_BUILD_DEPEND(zlib-devel)