Date: Sat, 20 Oct 2012 03:02:12 GMT From: Richard Yao <ryao@gentoo.org> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/172894: Out-of-tree kernel module compilation with GNU xargs in $PATH Message-ID: <201210200302.q9K32Clh084121@red.freebsd.org> Resent-Message-ID: <201210200310.q9K3A1GU086237@freefall.freebsd.org>
next in thread | raw e-mail | index | archive | help
>Number: 172894
>Category: kern
>Synopsis: Out-of-tree kernel module compilation with GNU xargs in $PATH
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sat Oct 20 03:10:01 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator: Richard Yao
>Release: FreeBSD 9.1-BETA1
>Organization:
Gentoo BSD Team
>Environment:
FreeBSD freebsd 9.1-BETA1 FreeBSD 9.1-BETA1 #0: Fri Jul 20 21:39:23 EDT 2012 root@freebsd:/usr/obj/usr/src/sys/GENERIC amd64
>Description:
I was working on a port of a Linux kernel module to FreeBSD. I decided to
rebase on FreeBSD 9.1-BETA1. I installed Gentoo Prefix so that I would
be able to work on this port in a more familiar development environment.
Unfortunately, there was an issue where /usr/src/sys/conf/kmod.mk invokes
xargs with -J, which Gentoo Prefix's GNU xargs does not support. I have
written a patch for kmod.mk that will attempt shell substitution in
place of xargs when the current command that relies on xargs fails.
This report was originally submitted to hackers@FreeBSD.org three months ago. Eitan Adler requested that I file a problem report.
>How-To-Repeat:
1. Install Gentoo Prefix
2. Start Prefix Shell (to put GNU xargs in $PATH)
3. Try building an out-of-tree kernel module.
>Fix:
--- /usr/src/sys/conf/kmod.mk.orig 2012-08-02 23:49:09.749192513 -0400
+++ /usr/src/sys/conf/kmod.mk 2012-08-04 08:57:25.719110508 -0400
@@ -217,7 +217,8 @@ ${FULLPROG}: ${OBJS}
grep -v '^#' < ${EXPORT_SYMS} > export_syms
.endif
awk -f ${SYSDIR}/conf/kmod_syms.awk ${.TARGET} \
- export_syms | xargs -J% ${OBJCOPY} % ${.TARGET}
+ export_syms | xargs -J% ${OBJCOPY} % ${.TARGET} || \
+ ${OBJCOPY} $(awk -f ${SYSDIR}/conf/kmod_syms.awk ${.TARGET} export_syms) ${.TARGET}
.endif
.endif
.if !defined(DEBUG_FLAGS) && ${__KLD_SHARED} == no
>Release-Note:
>Audit-Trail:
>Unformatted:
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201210200302.q9K32Clh084121>