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xserver_xorg-server: Change default to X.org modular server

PATCH New Bernd Kuhls 4 participants 7 messages Apr 11, 2015 – Apr 13, 2015

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#0 lore raw

PATCH v2 1/1 xserver_xorg-server: Change default to X.org modular server

---
v2: Change default for all toolchain configurations (Thomas)

 package/x11r7/xserver_xorg-server/Config.in |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
package/x11r7/xserver_xorg-server/Config.in +1 -1
index 1123f3b..54d7c24 100644
@@ -58,7 +58,7 @@ if BR2_PACKAGE_XSERVER_XORG_SERVER
 
 choice
 	prompt "X Window System server type"
-	default BR2_PACKAGE_XSERVER_XORG_SERVER_KDRIVE
+	default BR2_PACKAGE_XSERVER_XORG_SERVER_MODULAR
 	help
 	  Select the X Window System server to use
 
Signature · 1 line
1.7.10.4
#1 lore raw

PATCH v2 1/1 xserver_xorg-server: Change default to X.org modular server

Dear Bernd Kuhls,

Quoted 4 lines · Bernd Kuhls

---
v2: Change default for all toolchain configurations (Thomas)

Well, it's not actually changing the default for all toolchain configurations, since the modular X.org variant requires C++ support, while the KDrive variant does not.

However, probably this doesn't matter. On such a change, I'd like to have a Acked-by from a few other Buildroot developers. Yann, Arnout, Gustavo, what do you think?

Best regards,

Thomas

Signature · 3 lines
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
#2 lore raw

PATCH v2 1/1 xserver_xorg-server: Change default to X.org modular server

Thomas, Bernd, All,

On 2015-04-11 19:58 +0200, Thomas Petazzoni spake thusly:

Quoted 6 lines · Bernd Kuhls
Quoted 4 lines

---
v2: Change default for all toolchain configurations (Thomas)

Quoted 7 lines

Well, it's not actually changing the default for all toolchain configurations, since the modular X.org variant requires C++ support, while the KDrive variant does not.

However, probably this doesn't matter. On such a change, I'd like to have a Acked-by from a few other Buildroot developers. Yann, Arnout, Gustavo, what do you think?

I would not mind much doing the switch to the modular Xserver by default. But that would mean proper dependency propagation (i.e. C++).

However, an alternative solution would be to remove the 'default' clause altogether from the choice:

- if C++ is available, the modular Xserver is enabled by default,

    being the first option in the choice;

- if C++ is not enabled, then KDrive is enabled, being the only option in the choice.

Regards,
Yann E. MORIN.

Signature · 6 lines
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| +33 662 376 056 | Software  Designer | \ / CAMPAIGN     |  ___               |
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#3 lore raw

PATCH v2 1/1 xserver_xorg-server: Change default to X.org modular server

Dear Yann E. MORIN,

Quoted 2 lines · Yann E. MORIN

I would not mind much doing the switch to the modular Xserver by default. But that would mean proper dependency propagation (i.e. C++).

I don't understand what you mean here.

Quoted 8 lines

However, an alternative solution would be to remove the 'default' clause altogether from the choice:

- if C++ is available, the modular Xserver is enabled by default,

    being the first option in the choice;

- if C++ is not enabled, then KDrive is enabled, being the only option in the choice.

Well, Bernd's patch is doing that in a perfectly fine way. If C++ is available, the default on modular will work. If C++ is not available, since the modular option will not be available, the only remaining option in the choice will be Kdrive, and it will be the selected option.

Am I missing something?

Thomas

Signature · 3 lines
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
#4 lore raw

PATCH v2 1/1 xserver_xorg-server: Change default to X.org modular server

Thomas, All,

On 2015-04-11 20:18 +0200, Thomas Petazzoni spake thusly:

Quoted 8 lines

Dear Yann E. MORIN,

Quoted 2 lines · Yann E. MORIN

I would not mind much doing the switch to the modular Xserver by default. But that would mean proper dependency propagation (i.e. C++).

I don't understand what you mean here.

See below...

Quoted 9 lines
Quoted 8 lines

However, an alternative solution would be to remove the 'default' clause altogether from the choice:

- if C++ is available, the modular Xserver is enabled by default,

    being the first option in the choice;

- if C++ is not enabled, then KDrive is enabled, being the only option in the choice.

Quoted 6 lines

Well, Bernd's patch is doing that in a perfectly fine way. If C++ is available, the default on modular will work. If C++ is not available, since the modular option will not be available, the only remaining option in the choice will be Kdrive, and it will be the selected option.

Am I missing something?

No, not really.

Even though 'default' in Kconfig is not authoritative, and that's not even a warning to default to an option that has unmet dependencies, I still find it odd to default to that option.

And since the default is defaulting to the first entry in the choice, it is no longer needed at all.

At best, we could add a comment summarising the situation.

Regards,
Yann E. MORIN.

Signature · 6 lines
.-----------------.--------------------.------------------.--------------------.
|  Yann E. MORIN  | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: |
| +33 662 376 056 | Software  Designer | \ / CAMPAIGN     |  ___               |
| +33 223 225 172 `------------.-------:  X  AGAINST      |  \e/  There is no  |
| http://ymorin.is-a-geek.org/ | _/*\_ | / \ HTML MAIL    |   v   conspiracy.  |
'------------------------------^-------^------------------^--------------------'
#5 lore raw

PATCH v2 1/1 xserver_xorg-server: Change default to X.org modular server

Quoted 32 lines · Yann E. MORIN

Thomas, All,

On 2015-04-11 20:18 +0200, Thomas Petazzoni spake thusly:

Quoted 8 lines

Dear Yann E. MORIN,

Quoted 2 lines · Yann E. MORIN

I would not mind much doing the switch to the modular Xserver by default. But that would mean proper dependency propagation (i.e. C++).

I don't understand what you mean here.

See below...

Quoted 9 lines
Quoted 8 lines

However, an alternative solution would be to remove the 'default' clause altogether from the choice:

- if C++ is available, the modular Xserver is enabled by default,

    being the first option in the choice;

- if C++ is not enabled, then KDrive is enabled, being the only optionhttp://patchwork.ozlabs.org/patch/400833/ in the choice.

Quoted 6 lines

Well, Bernd's patch is doing that in a perfectly fine way. If C++ is available, the default on modular will work. If C++ is not available, since the modular option will not be available, the only remaining option in the choice will be Kdrive, and it will be the selected option.

Am I missing something?

No, not really.

Quoted 8 lines

Even though 'default' in Kconfig is not authoritative, and that's not even a warning to default to an option that has unmet dependencies, I still find it odd to default to that option.

And since the default is defaulting to the first entry in the choice, it is no longer needed at all.

At best, we could add a comment summarising the situation.

Then it's better to go for Bernd's original patch [1] because it explicitly
gives the different defaults for the different situations.

ThomasP's comment to that was that it is strange that a choice default depends
on the toolchain options. It makes sense to make a default depend on the arch options, because we consider that something that can't be controlled by the user, but changing the default based on toolchain options sounds a bit weird.

But of course, we already have a bunch of those, although it's not as explicit
as in [1]. E.g. the media backend of dvdrw-tools defaults to cdrkit if kernel-headers >= 3.0, else it defaults to xorriso; gpu-amd-bin-mx51 output defaults to X11 if X11 is selected, else it defaults to framebuffer.

So I'm in favour of going back to [1].

Regards,
Arnout

[1] http://patchwork.ozlabs.org/patch/400833/

Signature · 6 lines
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
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