On Wednesday, June 1, 2016 at 12:26:31 AM UTC+1, Volker Braun wrote:
>
> Yes, there is not much we can do about the case-sensitivity "feature" in 
> OSX. Probably the best course of action would be to raise an error as soon 
> as possible instead of attempting to build.
>

I just asked : 
http://apple.stackexchange.com/questions/240245/checking-path-capitalization-of-pwd

We'll see, if there will be no reply, we'd work out ourselves a quick check 
that we can do in the top makefile or some more appropriate way.
 

>
>
> On Tuesday, May 31, 2016 at 9:05:37 PM UTC+2, Dima Pasechnik wrote:
>>
>> in more detail, build scrips routinely use `pwd` to figure out the 
>> current directory. Now, watch this (on OSX):
>>
>> nash:~ dima$ cd desktop
>>
>> nash:desktop dima$ pwd
>>
>> /Users/dima/desktop
>>
>> nash:desktop dima$ cd    
>>
>> nash:~ dima$ cd Desktop 
>>
>> nash:Desktop dima$ pwd
>> /Users/dima/Desktop 
>>
>> No wonder these "slightly wrong" paths get into configurations, and then 
>> some tools, which are case-sensitive, choke on them...
>>
>>
>> On Tuesday, May 31, 2016 at 7:48:16 PM UTC+1, Dima Pasechnik wrote:
>>>
>>>
>>>
>>> On Tuesday, May 31, 2016 at 7:37:09 PM UTC+1, paulmasson wrote:
>>>>
>>>> I have a partial answer as to what is causing these errors. Before 
>>>> starting 'make' I switched to the Sage directory using 'cd desktop/sage', 
>>>> as you can see by the small 'd' in 'desktop'. On a Mac that directory is 
>>>> most properly 'Desktop' with a capital 'D'. I revisited the build that 
>>>> halted by switching to the Sage directory with 'cd Desktop/sage' and again 
>>>> running 'make', and now everything copies and builds just fine.
>>>>
>>>
>>> oy gevalt :-( Well, OSX case-insensitive file systems (legacy of OSY 
>>> with Y<10) lend you a very helping hand to shoot yourself in the foot.
>>>
>>>>
>>>> That leaves open the question of why the build process is allowed to 
>>>> mostly work with the slightly wrong directory name, and how to flag the 
>>>> error before building starts.
>>>>
>>>
>>> well, it's because of inability to distinguish right from wrong, 
>>> apparently, due to oh so helpful case-insensitivity "feature".
>>>
>>>>
>>>>
>>>> On Sunday, May 29, 2016 at 3:02:31 PM UTC-7, paulmasson wrote:
>>>>>
>>>>> Turns out this issue has nothing to do with the Github copy. I 
>>>>> downloaded a 7.2 tarball and had the same issue a total of nine times. 
>>>>> Here 
>>>>> are the successive error messages:
>>>>>
>>>>> /Users/Masson/desktop/sage/src/build/cythonized/sage/combinat/partitions.cpp:323:26:
>>>>>  
>>>>> fatal error: partitions_c.h: No such file or directory
>>>>>
>>>>>  #include "partitions_c.h"
>>>>>
>>>>> /Users/Masson/desktop/sage/src/build/cythonized/sage/combinat/matrices/dancing_links.cpp:319:29:
>>>>>  
>>>>> fatal error: dancing_links_c.h: No such file or directory
>>>>>
>>>>>  #include "dancing_links_c.h"
>>>>>
>>>>> /Users/Masson/desktop/sage/src/build/cythonized/sage/graphs/base/boost_graph.cpp:314:31:
>>>>>  
>>>>> fatal error: boost_interface.cpp: No such file or directory
>>>>>
>>>>>  #include "boost_interface.cpp"
>>>>>
>>>>> /Users/Masson/desktop/sage/src/build/cythonized/sage/libs/ecl.c:324:20: 
>>>>> fatal error: eclsig.h: No such file or directory
>>>>>
>>>>>  #include "eclsig.h"
>>>>>
>>>>> /Users/Masson/desktop/sage/src/build/cythonized/sage/libs/ppl.cpp:336:23: 
>>>>> fatal error: ppl_shim.hh: No such file or directory
>>>>>
>>>>>  #include "ppl_shim.hh"
>>>>>
>>>>> /Users/Masson/desktop/sage/src/build/cythonized/sage/libs/eclib/mwrank.cpp:356:20:
>>>>>  
>>>>> fatal error: wrap.cpp: No such file or directory
>>>>>
>>>>>  #include "wrap.cpp"
>>>>>
>>>>> /Users/Masson/desktop/sage/src/build/cythonized/sage/matroids/matroid.c:296:22:
>>>>>  
>>>>> fatal error: minorfix.h: No such file or directory
>>>>>
>>>>>  #include "minorfix.h"
>>>>>
>>>>> /Users/Masson/desktop/sage/src/build/cythonized/sage/misc/darwin_utilities.c:290:33:
>>>>>  
>>>>> fatal error: darwin_memory_usage.h: No such file or directory
>>>>>
>>>>>  #include "darwin_memory_usage.h"
>>>>>
>>>>> /Users/Masson/desktop/sage/src/build/cythonized/sage/symbolic/pynac.cpp:334:22:
>>>>>  
>>>>> fatal error: pynac_cc.h: No such file or directory
>>>>>
>>>>>  #include "pynac_cc.h"
>>>>>
>>>>> After each failed build I manually copied each missing file to the 
>>>>> appropriate directory and ran 'make' again. I now have a running build of 
>>>>> 7.2. Yippee!
>>>>>
>>>>> A friend has suggested that the errors might be caused by bad line 
>>>>> endings that only show up on a Mac. Any other explanations for such 
>>>>> apparently random behavior?
>>>>>
>>>>>
>>>>> On Saturday, May 28, 2016 at 5:55:04 PM UTC-7, paulmasson wrote:
>>>>>>
>>>>>> Running OS X El Capitan on a year-old Macbook.
>>>>>>
>>>>>> Deleted my entire Sage directory. Did a clean clone from 
>>>>>> github.com/sagemath/sage.git. Immediately changed to Sage directory 
>>>>>> and ran make. Same error as previously:
>>>>>>
>>>>>> error: command 'gcc' failed with exit status 1
>>>>>>
>>>>>> /Users/Masson/downloads/github/sage/src/build/cythonized/sage/combinat/partitions.cpp:323:26:
>>>>>>  
>>>>>> fatal error: partitions_c.h: No such file or directory
>>>>>>
>>>>>>  #include "partitions_c.h"
>>>>>>
>>>>>>                           ^
>>>>>>
>>>>>> compilation terminated.
>>>>>>
>>>>>> make[3]: *** [sage] Error 1
>>>>>>
>>>>>>
>>>>>> Is there a problem building from the github copy?
>>>>>>
>>>>>

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