1 files changed, 38 insertions, 0 deletions
diff --git a/m4/libwrap.m4 b/m4/libwrap.m4
new file mode 100644
index 0000000..895c067
--- /dev/null
+++ b/m4/libwrap.m4
@@ -0,0 +1,38 @@
+AC_DEFUN([DOVECOT_LIBWRAP], [
+  have_libwrap=no
+  if test $want_libwrap != no; then
+    AC_CHECK_HEADER(tcpd.h, [
+      old_LIBS=$LIBS
+  
+      AC_CACHE_CHECK([whether we have libwrap],i_cv_have_libwrap,[
+        AC_TRY_COMPILE([
+          #include <tcpd.h>
+          int allow_severity = 0;
+          int deny_severity = 0;
+        ], [
+          request_init((void *)0);
+        ], [
+          i_cv_have_libwrap=yes
+        ], [
+          i_cv_have_libwrap=no
+        ])
+      ])
+      if test $i_cv_have_libwrap = yes; then
+        AC_DEFINE(HAVE_LIBWRAP,, [Define if you have libwrap])
+        LIBWRAP_LIBS=-lwrap
+        AC_SUBST(LIBWRAP_LIBS)
+        have_libwrap=yes
+      else
+        if test "$want_libwrap" = "yes"; then
+          AC_ERROR([Can't build with libwrap support: libwrap not found])
+        fi
+      fi
+      LIBS=$old_LIBS
+    ], [
+      if test "$want_libwrap" = "yes"; then
+        AC_ERROR([Can't build with libwrap support: tcpd.h not found])
+      fi
+    ])
+  fi
+  AM_CONDITIONAL(TCPWRAPPERS, test "$have_libwrap" = "yes")
+])