Re: [Qemu-devel] [PATCH] configure

Re: [Qemu-devel] [PATCH] configure

[Juergen Keil]

> Thiemo Seufer wrote:
> Jeff Chua wrote:
> [snip]
> > @@ -567,7 +567,8 @@
> >    fi
> > 
> >    # Check if tools are available to build documentation.
> > -if [ -x "`which texi2html`" ] && [ -x "`which pod2man`" ]; then
> > +if [ -x "`which texi2html 2>/dev/null`" \
> > +	-a -x "`which pod2man 2>/dev/null`" ]; then
> 
> Under which circumstances does "which" complain about unavailable
> executables?

 
Isn't the use of "which" wrong, anyway?  

"which" belongs to csh/tcsh, and tells you about csh's/tcsh's idea 
about a command or a csh command alias.

IMO, for a /bin/sh (or bash) script, using the "type" command would
be a better idea.

Re: [Qemu-devel] [PATCH] configure

[Jeff Chua]

On 5/9/07, Juergen Keil <jk@tools.de> wrote:

> Isn't the use of "which" wrong, anyway?
>
> "which" belongs to csh/tcsh, and tells you about csh's/tcsh's idea
> about a command or a csh command alias.
>
> IMO, for a /bin/sh (or bash) script, using the "type" command would
> be a better idea.

"which" returns the first path, "type" returns all paths.

# type awk
awk is /bin/awk
awk is /usr/bin/awk
# which awk
/bin/awk
# type foo
-bash: type: foo: not found


Either way would work, but even with "type", it still needs to be
"type foo 2>/dev/null".

Thanks,
Jeff.

Re: [Qemu-devel] [PATCH] configure

[Andreas Schwab]

"Jeff Chua" <jeff.chua.linux@gmail.com> writes:

> On 5/9/07, Juergen Keil <jk@tools.de> wrote:
>
>> Isn't the use of "which" wrong, anyway?
>>
>> "which" belongs to csh/tcsh, and tells you about csh's/tcsh's idea
>> about a command or a csh command alias.
>>
>> IMO, for a /bin/sh (or bash) script, using the "type" command would
>> be a better idea.
>
> "which" returns the first path, "type" returns all paths.

You want "type -p".

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

Re: [Qemu-devel] [PATCH] configure

[Jeff Chua]

On 5/9/07, Andreas Schwab <schwab@suse.de> wrote:
> "Jeff Chua" <jeff.chua.linux@gmail.com> writes:

> > "which" returns the first path, "type" returns all paths.
>
> You want "type -p".

# type awk
awk is /bin/awk
awk is /usr/bin/awk
# type -p awk
/bin/awk
/usr/bin/awk
# type foo
-bash: type: foo: not found
# type -p foo
#

Interesting. "type -p foo" does the same as "type foo 2>/dev/null",
but only if "foo" is not found. Tried that on "awk" above, and it
prints the paths.

Thanks,
Jeff.

Re: [Qemu-devel] [PATCH] configure

[Andreas Schwab]

"Jeff Chua" <jeff.chua.linux@gmail.com> writes:

> # type awk
> awk is /bin/awk
> awk is /usr/bin/awk
> # type -p awk
> /bin/awk
> /usr/bin/awk

You are not using type, but type -a.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."

Re: [Qemu-devel] [PATCH] configure

[Joachim Henke]

On Wed, 2007-05-09 at 10:51 +0200, Juergen Keil wrote:
> Isn't the use of "which" wrong, anyway?  
> 
> "which" belongs to csh/tcsh, and tells you about csh's/tcsh's idea 
> about a command or a csh command alias.
> 
> IMO, for a /bin/sh (or bash) script, using the "type" command would
> be a better idea.


Yes, 'which' is not reliable.

I already posted a patch regarding Mac OS X here:

http://lists.gnu.org/archive/html/qemu-devel/2007-04/msg00649.html


It fixes gcc detection only, because the other tools, that are detected
by which, are installed anyway. This is of course not clean, but worked
for the time.


-- 
Joachim Henke
http://base91.sourceforge.net/j-o/

Re: [Qemu-devel] [PATCH] configure

[Thiemo Seufer]

Joachim Henke wrote:
> On Wed, 2007-05-09 at 10:51 +0200, Juergen Keil wrote:
> > Isn't the use of "which" wrong, anyway?  
> > 
> > "which" belongs to csh/tcsh, and tells you about csh's/tcsh's idea 
> > about a command or a csh command alias.
> > 
> > IMO, for a /bin/sh (or bash) script, using the "type" command would
> > be a better idea.
> 
> Yes, 'which' is not reliable.

"type" appears to be bash-specific, at least according to the bash
documentation, so I stuck with "which" for now.


Thiemo

[Qemu-devel] Re: [PATCH] configure

[Ben Pfaff]

Thiemo Seufer <ths@networkno.de> writes:

> Joachim Henke wrote:
>> On Wed, 2007-05-09 at 10:51 +0200, Juergen Keil wrote:
>> > Isn't the use of "which" wrong, anyway?  
>> > 
>> > "which" belongs to csh/tcsh, and tells you about csh's/tcsh's idea 
>> > about a command or a csh command alias.
>> > 
>> > IMO, for a /bin/sh (or bash) script, using the "type" command would
>> > be a better idea.
>> 
>> Yes, 'which' is not reliable.
>
> "type" appears to be bash-specific, at least according to the bash
> documentation, so I stuck with "which" for now.

You could use "command -v" from SUSv3.
-- 
Ben Pfaff 
http://benpfaff.org

Re: [Qemu-devel] [PATCH] configure

[Ben Taylor]

---- Jeff Chua <jeff.chua.linux@gmail.com> wrote: 
> For those who does minimal install. In this case,  texi2html would not
> be available on the system. I've seen quite a few systems without
> texi2html.
> 
> Again, the patch is not a MUST, but it's nice not to see unnecessary warning.

I suppose you could do a -n  "`texi2html -verbose 2>&1 | head -1 |grep 'This is texi2html'`"
which would be more representative if you have texi2html or not.

Ben

[Qemu-devel] [PATCH] configure

[Jeff Chua]

Avi had suggest I post this patch here so that it can be included in qemu 
instead of kvm.


Here's a little patch to silent ...
   	- sdl-config when SDK is compiled without static library
   	- texi2html when not found

Thanks,
Jeff


--- kvm/qemu/configure.org	2007-05-07 20:36:59 +0800
+++ kvm/qemu/configure	2007-05-07 20:40:58 +0800
@@ -523,8 +523,8 @@
    # static link with sdl ?
    if test "$sdl" = "yes" ; then
    aa="no"
-`$sdl_config --static-libs | grep \\\-laa > /dev/null` && aa="yes"
-sdl_static_libs=`$sdl_config --static-libs`
+`$sdl_config --static-libs 2>/dev/null | grep \\\-laa > /dev/null` && aa="yes"
+sdl_static_libs=`$sdl_config --static-libs 2>/dev/null`
    if [ "$aa" = "yes" ] ; then
      sdl_static_libs="$sdl_static_libs `aalib-config --static-libs`"
    fi
@@ -567,7 +567,8 @@
    fi

    # Check if tools are available to build documentation.
-if [ -x "`which texi2html`" ] && [ -x "`which pod2man`" ]; then
+if [ -x "`which texi2html 2>/dev/null`" \
+	-a -x "`which pod2man 2>/dev/null`" ]; then
      build_docs="yes"
    fi

Re: [Qemu-devel] [PATCH] configure

[Thiemo Seufer]

Jeff Chua wrote:
[snip]
> @@ -567,7 +567,8 @@
>    fi
> 
>    # Check if tools are available to build documentation.
> -if [ -x "`which texi2html`" ] && [ -x "`which pod2man`" ]; then
> +if [ -x "`which texi2html 2>/dev/null`" \
> +	-a -x "`which pod2man 2>/dev/null`" ]; then

Under which circumstances does "which" complain about unavailable
executables?


Thiemo

Re: [Qemu-devel] [PATCH] configure

[Jeff Chua]

For those who does minimal install. In this case,  texi2html would not
be available on the system. I've seen quite a few systems without
texi2html.

Again, the patch is not a MUST, but it's nice not to see unnecessary warning.

Thanks,
Jeff.


On 5/9/07, Thiemo Seufer <ths@networkno.de> wrote:
> Jeff Chua wrote:
> [snip]
> > @@ -567,7 +567,8 @@
> >    fi
> >
> >    # Check if tools are available to build documentation.
> > -if [ -x "`which texi2html`" ] && [ -x "`which pod2man`" ]; then
> > +if [ -x "`which texi2html 2>/dev/null`" \
> > +     -a -x "`which pod2man 2>/dev/null`" ]; then
>
> Under which circumstances does "which" complain about unavailable
> executables?
>
>
> Thiemo
>

Re: [Qemu-devel] [PATCH] configure

[Thiemo Seufer]

Jeff Chua wrote:
> For those who does minimal install. In this case,  texi2html would not
> be available on the system. I've seen quite a few systems without
> texi2html.
> 
> Again, the patch is not a MUST, but it's nice not to see unnecessary 
> warning.

I don't see a warning for e.g. "which foo" on my system. Could you
describe your system and paste the output the which command produces
there?

> Thanks,
> Jeff.
> 
> 
> On 5/9/07, Thiemo Seufer <ths@networkno.de> wrote:
> >Jeff Chua wrote:
> >[snip]
> >> @@ -567,7 +567,8 @@
> >>    fi
> >>
> >>    # Check if tools are available to build documentation.
> >> -if [ -x "`which texi2html`" ] && [ -x "`which pod2man`" ]; then
> >> +if [ -x "`which texi2html 2>/dev/null`" \
> >> +     -a -x "`which pod2man 2>/dev/null`" ]; then
> >
> >Under which circumstances does "which" complain about unavailable
> >executables?
> >
> >
> >Thiemo
> >

Re: [Qemu-devel] [PATCH] configure

[Jeff Chua]

On 5/9/07, Thiemo Seufer <ths@networkno.de> wrote:

> I don't see a warning for e.g. "which foo" on my system. Could you
> describe your system and paste the output the which command produces
> there?

# which foo
which: no foo in
(/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin:/usr/X11/bin:/usr/local/games:/usr/local/samba/sbin:/usr/local/samba/bin:/etc/rc.d:/root/scripts2:/root/cc2:/usr/local/apache2/bin:/usr/local/squid/sbin:/opt/java/bin:/usr/local/netpbm/bin:/usr/local/ssh/bin:/usr/local/ssl/bin:/usr/lib/yp:.:/usr/vbin:/usr/local/python/bin:/usr/local/tcl/bin:/usr/local/kvm/bin:/usr/local/perl/bin:/db/oracle/db1/bin:/root/oracle2:/usr/local/git/bin:/opt/sybase/bin)
# echo $?
1
# which vi
/usr/bin/vi
# echo $?
0


Thanks,
Jeff.