On 06/12/2015 07:06 PM, Burton, Ross wrote:

On 12 June 2015 at 04:23, Robert Yang <[email protected]
<mailto:[email protected]>> 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
--
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