[nfs-utils PATCH 1/1] Let the configure script find getrpcbynumber in libtirpc

[Petr Vorel <petr.vorel@gmail.com>]

From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

The getrpcbynumber() function may not be available in the C library,
but only in the libtirpc library. Take this into account when checking
for the existence of getrpcbynumber() and getrpcbynumber_r().

Reviewed-by: Petr Vorel <petr.vorel@gmail.com>
[ pvorel: patch taken from Buildroot distribution ]
Signed-off-by: Petr Vorel <petr.vorel@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
---
 configure.ac | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 949ff9fc..e9699752 100644
--- a/configure.ac
+++ b/configure.ac
@@ -534,11 +534,23 @@ AC_FUNC_STAT
 AC_FUNC_VPRINTF
 AC_CHECK_FUNCS([alarm atexit dup2 fdatasync ftruncate getcwd \
                gethostbyaddr gethostbyname gethostname getmntent \
-               getnameinfo getrpcbyname getrpcbynumber getrpcbynumber_r getifaddrs \
+               getnameinfo getrpcbyname getifaddrs \
                gettimeofday hasmntopt inet_ntoa innetgr memset mkdir pathconf \
                ppoll realpath rmdir select socket strcasecmp strchr strdup \
                strerror strrchr strtol strtoul sigprocmask name_to_handle_at])
 
+save_CFLAGS=$CFLAGS
+save_LIBS=$LIBS
+CFLAGS="$CFLAGS $AM_CPPFLAGS"
+LIBS="$LIBS $LIBTIRPC"
+AC_CHECK_FUNCS([getrpcbynumber getrpcbynumber_r])
+CFLAGS=$save_CFLAGS
+LIBS=$save_LIBS
+
+if test "$ac_cv_func_getrpcbynumber_r" != "yes" -a "$ac_cv_func_getrpcbynumber" != "yes"; then
+   AC_MSG_ERROR([Neither getrpcbynumber_r nor getrpcbynumber are available])
+fi
+
 dnl *************************************************************
 dnl Check for data sizes
 dnl *************************************************************
-- 
2.24.0