* best way to prevent a cygwin build?
@ 2011-12-02 7:46 Paul Allen Newell
2011-12-02 9:47 ` Csaba Raduly
2011-12-02 17:39 ` Warren Young
0 siblings, 2 replies; 5+ messages in thread
From: Paul Allen Newell @ 2011-12-02 7:46 UTC (permalink / raw)
To: cygwin; +Cc: pnewell
Dear Cygwin:
I have a network of Fedora machines and WinXP running Cygwin. Most of
the projects I work on can be compiled/linked/run under both, but there
are exceptions. As in Maya ...
I am not happy with having to run two separate source trees and would
like a way (as in "best standard") to add something to any Maya makefile
which will prevent execution if it is being compiled on Cygwin. The best
I have been able to come up with is a check under each make directive,
but that's alot of exceptions where I would think only one would be
necessary.
I searched the GNU make docs and googled for such, but the best I could
see were bailout rules under a given make rule directive. I can find out
whether I need to bail by the test "ifeq (Cygwin, $(shell uname -o))"
but can't figure out a way to have the makefile ask this question once
for the entire set of make directives in it.
Any suggestions?
Thanks,
Paul
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: best way to prevent a cygwin build?
2011-12-02 7:46 best way to prevent a cygwin build? Paul Allen Newell
@ 2011-12-02 9:47 ` Csaba Raduly
2011-12-02 18:50 ` Dave Korn
2011-12-02 17:39 ` Warren Young
1 sibling, 1 reply; 5+ messages in thread
From: Csaba Raduly @ 2011-12-02 9:47 UTC (permalink / raw)
To: cygwin; +Cc: pnewell
On Fri, Dec 2, 2011 at 8:46 AM, Paul Allen Newell wrote:
> Dear Cygwin:
>
> I have a network of Fedora machines and WinXP running Cygwin. Most of the
> projects I work on can be compiled/linked/run under both, but there are
> exceptions. As in Maya ...
>
> I am not happy with having to run two separate source trees and would like a
> way (as in "best standard") to add something to any Maya makefile which will
> prevent execution if it is being compiled on Cygwin. The best I have been
> able to come up with is a check under each make directive, but that's alot
> of exceptions where I would think only one would be necessary.
>
> I searched the GNU make docs and googled for such, but the best I could see
> were bailout rules under a given make rule directive. I can find out whether
> I need to bail by the test "ifeq (Cygwin, $(shell uname -o))" but can't
> figure out a way to have the makefile ask this question once for the entire
> set of make directives in it.
ifeq (Cygwin, $(shell uname -o))
PLATFORM := CYGWIN
endif
.
.
.
ifeq ($(PLATFORM), CYGWIN)
# Cygwin-specific stuff
endif
--
GCS a+ e++ d- C++ ULS$ L+$ !E- W++ P+++$ w++$ tv+ b++ DI D++ 5++
The Tao of math: The numbers you can count are not the real numbers.
Life is complex, with real and imaginary parts.
"Ok, it boots. Which means it must be bug-free and perfect. " -- Linus Torvalds
"People disagree with me. I just ignore them." -- Linus Torvalds
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: best way to prevent a cygwin build?
2011-12-02 7:46 best way to prevent a cygwin build? Paul Allen Newell
2011-12-02 9:47 ` Csaba Raduly
@ 2011-12-02 17:39 ` Warren Young
1 sibling, 0 replies; 5+ messages in thread
From: Warren Young @ 2011-12-02 17:39 UTC (permalink / raw)
To: Cygwin-L
On 12/2/2011 12:46 AM, Paul Allen Newell wrote:
>
> I am not happy with having to run two separate source trees and would
> like a way (as in "best standard") to add something to any Maya makefile
> which will prevent execution if it is being compiled on Cygwin.
You might get better answers if you give an example of what you mean by
"prevent execution". Not because we don't know what that means in
general, but because it *is* too general.
For example, if what you were after is to have some programs in a system
compiled conditionally, Automake + Autoconf makes that easy:
https://www.gnu.org/s/hello/manual/automake/Conditional-Programs.html
If you want something else suppressed, the answer might be different.
Generally speaking, any time you want to do some up-front tests for
platform compatibility issues that affect how a program gets built,
Autoconf is probably a good answer. It is not a pretty tool, but it's
one of those tools that keeps getting reinvented poorly, so it remains
the most popular out of lack of better alternatives.
On one of my projects, I use another Automake competitor, Bakefile.
Bakefile builds Autoconf Makefile.in files, generic GNU Makefiles,
Visual C++ project files, Xcode project files, etc., all from a single
high-level description of what you want built. You can include things
conditionally based on platform or pretty much any criterion you can
code up in a Python extension to Bakefile. Bakefile is not in the
Cygwin package repo, however, partly because it doesn't build cleanly on
Cygwin. The native Windows port works just fine with Cygwin, though.
You might also look at cmake, which competes with the Autotools and
Bakefile, and *is* in the Cygwin package repo. I can't tell you
anything more about it.
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* Re: best way to prevent a cygwin build?
2011-12-02 9:47 ` Csaba Raduly
@ 2011-12-02 18:50 ` Dave Korn
2011-12-03 0:34 ` [SOLVED:] " Paul Allen Newell
0 siblings, 1 reply; 5+ messages in thread
From: Dave Korn @ 2011-12-02 18:50 UTC (permalink / raw)
To: cygwin
On 02/12/2011 09:47, Csaba Raduly wrote:
> On Fri, Dec 2, 2011 at 8:46 AM, Paul Allen Newell wrote:
>> I am not happy with having to run two separate source trees and would like a
>> way (as in "best standard") to add something to any Maya makefile which will
>> prevent execution if it is being compiled on Cygwin. The best I have been
>> able to come up with is a check under each make directive, but that's alot
>> of exceptions where I would think only one would be necessary.
>>
>> I searched the GNU make docs and googled for such, but the best I could see
>> were bailout rules under a given make rule directive. I can find out whether
>> I need to bail by the test "ifeq (Cygwin, $(shell uname -o))" but can't
>> figure out a way to have the makefile ask this question once for the entire
>> set of make directives in it.
>
> ifeq (Cygwin, $(shell uname -o))
> PLATFORM := CYGWIN
> endif
Well, in this particular case:
ifeq (Cygwin, $(shell uname -o))
$(error This project does not build in Cygwin)
endif
Can be placed anywhere in the makefile, no need to modify the build rules.
cheers,
DaveK
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^ permalink raw reply [flat|nested] 5+ messages in thread
* [SOLVED:] Re: best way to prevent a cygwin build?
2011-12-02 18:50 ` Dave Korn
@ 2011-12-03 0:34 ` Paul Allen Newell
0 siblings, 0 replies; 5+ messages in thread
From: Paul Allen Newell @ 2011-12-03 0:34 UTC (permalink / raw)
To: cygwin; +Cc: pnewell
On 12/2/2011 10:49 AM, Dave Korn wrote:
>
> Well, in this particular case:
>
> ifeq (Cygwin, $(shell uname -o))
> $(error This project does not build in Cygwin)
> endif
>
> Can be placed anywhere in the makefile, no need to modify the build rules.
>
> cheers,
> DaveK
>
>
Csaba, Warren, and Dave:
Thanks for all of your replies.
The syntax/line:
+++
$(error This project does not build in Cygwin)
+++
is exactly what I was looking for as I didn't know how to force an exit.
I just tried it out and it works like a champ.
I also looked it up in GNU make man pages and it is there ... I don't
know how I missed it last night as I "thought" I checked for error. My
oversight on missing it, it was probably too late in the evening.
Paul
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^ permalink raw reply [flat|nested] 5+ messages in thread
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2011-12-02 7:46 best way to prevent a cygwin build? Paul Allen Newell
2011-12-02 9:47 ` Csaba Raduly
2011-12-02 18:50 ` Dave Korn
2011-12-03 0:34 ` [SOLVED:] " Paul Allen Newell
2011-12-02 17:39 ` Warren Young
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