[PATCH nfs-utils 2/2] configure: check for rpc/rpc.h presence

From: Roland Hieber <rhi@pengutronix.de>
To: Steve Dickson <steved@redhat.com>
Cc: linux-nfs@vger.kernel.org, Roland Hieber <rhi@pengutronix.de>
Subject: [PATCH nfs-utils 2/2] configure: check for rpc/rpc.h presence
Date: Tue, 25 May 2021 13:27:29 +0200	[thread overview]
Message-ID: <20210525112729.29062-2-rhi@pengutronix.de> (raw)
In-Reply-To: <20210525112729.29062-1-rhi@pengutronix.de>

Recent versions of glibc (since 2.26?) no longer supply rpc/rpc.h, and
in previous versions, RPC was optional. Detect such cases and prompt the
user to build with libtirpc instead.

Signed-off-by: Roland Hieber <rhi@pengutronix.de>
---
 configure.ac | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/configure.ac b/configure.ac
index f2e1bd30d0f2..25e988dfa33c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -335,6 +335,13 @@ AC_CHECK_HEADERS([sched.h], [], [])
 AC_CHECK_FUNCS([unshare fstatat statx], [] , [])
 AC_LIBPTHREAD([])
 
+# rpc/rpc.h can come from the glibc or from libtirpc
+nfsutils_save_CPPFLAGS="${CPPFLAGS}"
+CPPFLAGS="${CPPFLAGS} ${TIRPC_CFLAGS}"
+AC_CHECK_HEADER(rpc/rpc.h, ,
+                AC_MSG_ERROR([Header file rpc/rpc.h not found - maybe try building with --enable-tirpc]))
+CPPFLAGS="${nfsutils_save_CPPFLAGS}"
+
 if test "$enable_nfsv4" = yes; then
   dnl check for libevent libraries and headers
   AC_LIBEVENT
-- 
2.29.2

