An autoconf macro for its associated module.

[gnulib.git] / m4 / canon-host.m4

diff --git a/m4/canon-host.m4 b/m4/canon-host.m4
new file mode 100644 (file)
index 0000000..0c46494
--- /dev/null
+++ b/m4/canon-host.m4
@@ -0,0 +1,22 @@
+# canon-host.m4 serial 1
+dnl Copyright (C) 2002 Free Software Foundation, Inc.
+dnl This file is free software, distributed under the terms of the GNU
+dnl General Public License.  As a special exception to the GNU General
+dnl Public License, this file may be distributed as part of a program
+dnl that contains a configuration script generated by Autoconf, under
+dnl the same distribution terms as the rest of that program.
+
+AC_DEFUN([gl_CANON_HOST],
+[
+  dnl Prerequisites of lib/canon-host.c.
+  AC_CHECK_HEADERS_ONCE(stdlib.h string.h unistd.h)
+  AC_CHECK_HEADERS(netdb.h sys/socket.h netinet/in.h arpa/inet.h)
+
+  dnl Add any libraries as early as possible.
+  dnl In particular, inet_ntoa needs -lnsl at least on Solaris5.5.1,
+  dnl so we have to add -lnsl to LIBS before checking for that function.
+  AC_SEARCH_LIBS(gethostbyname, [inet nsl])
+
+  dnl These come from -lnsl on Solaris5.5.1.
+  AC_CHECK_FUNCS(gethostbyname gethostbyaddr inet_ntoa)
+])