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Date: Mon, 15 Jun 2015 13:21:04 +0800
From: Robert Yang <liezhi.yang@windriver.com>
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To: "Burton, Ross" <ross.burton@intel.com>
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Cc: OE-core <openembedded-core@lists.openembedded.org>
Subject: Re: [PATCH 1/2] insane.bbclass: check invalid ac_cv value
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On 06/12/2015 07:06 PM, Burton, Ross wrote:
>
> On 12 June 2015 at 04:23, Robert Yang <liezhi.yang@windriver.com
> <mailto:liezhi.yang@windriver.com>> wrote:
>
>     +        for var in tocheck.split():
>     +            if var.startswith('ac_cv_'):
>     +                varname = var.split('=')[0]
>     +                cfgscript=d.expand("${S}/configure")
>     +                if os.path.exists(cfgscript):
>     +                    statement = "grep -q -F %s  %s > /dev/null" % (varname,
>     cfgscript)
>
>
> So your assumption that ac_cv_* variables are referenced in full in configure is
> bad.  This is what strace has for the giant AC_CHECK_HEADERS block:

Yes, it doesn't work well, I will try to figure out other ways.

// Robert

>
> for ac_header in asm/cachectl.h asm/sysmips.h bluetooth/bluetooth.h elf.h
> inttypes.h ioctls.h linux/bsg.h linux/falloc.h linux/filter.h linux/hiddev.h
> linux/mmtimer.h linux/perf_event.h linux/seccomp.h linux/securebits.h
> linux/utsname.h mqueue.h netinet/sctp.h poll.h scsi/sg.h stropts.h sys/conf.h
> sys/epoll.h sys/fanotify.h sys/filio.h sys/ioctl.h sys/poll.h sys/reg.h
> sys/vfs.h sys/xattr.h
> do :
>    as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
> ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header"
> "$ac_includes_default"
>
> The variable name is constructed, so this test can't work.
>
> Ross