[ovs-dev] [PATCH 1/2] automake: Add AM_LDFLAGS while linking ovs-vswitchd.

Ben Pfaff blp at nicira.com
Mon Aug 18 16:51:33 UTC 2014

On Mon, Aug 18, 2014 at 07:48:10AM -0700, Gurucharan Shetty wrote:
> Commit d73105839 (netdev-dpdk: Move to DPDK 1.7.0) added
> 'vswitchd_ovs_vswitchd_LDFLAGS' in acinclude.m4. This caused the
> created Makefile to use 'vswitchd_ovs_vswitchd_LINK' without
> including 'AM_LDFLAGS'. This causes failure while building ovs-vswitchd
> with external libraries (ex: ovs-vswitchd on Windows with openssl.)
> This commit adds 'AM_LDFLAGS' to the new 'vswitchd_ovs_vswitchd_LDFLAGS'.
> Signed-off-by: Gurucharan Shetty <gshetty at nicira.com>

I didn't review commit d73105839 until now.  I don't think it's wise
to substitute an Automake-owned variable that way.  It's not commonly
done, so it might confuse readers (it would confuse me), and I doubt
that Automake guarantees that it will continue to work.

I would rather see acinclude.m4 substitute some variable whose name is
not owned by Automake, e.g. DPDK_LDFLAGS, and then in automake.mk
write vswitchd_ovs_vswitchd_LDFLAGS = $(AM_LDFLAGS) $(DPDK_LDFLAGS).

Does that make sense?



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