To your first point, the development headers are not installed. That can be 
remedied easily.
To your second point, yes, pkg-config is installed. There is no 
openblas.pc, apart from that in the sage-9.3 directory tree.

BTW, I had no problem with Sage-9.2, which also built openblas (0.3.9) from 
source.

On Monday, May 17, 2021 at 9:08:07 AM UTC-7 dim...@gmail.com wrote:

>
>
> On Mon, 17 May 2021, 16:42 Richard_L, <rich...@lozestech.com> wrote:
>
>> What I find in common for the 7 failures is:
>> "/home/rllozes/sage-9.3/local/lib/libopenblas.so.0(zgemm_kernel_n+0x9d)[0x7f2b0f8c549d]",
>>  
>> and further
>> "0x00007f2b0f8c549d in zgemm_kernel_n () at 
>> ../kernel/x86_64/zgemm_kernel_1x4_nehalem.S:214"
>> indicating an openblas error. 
>> The install.log shows that we built openblas with correct detection of 
>> AVX (yes), AVX2 (no), and AVX-512 (no), which was once a common root cause 
>> for openblas failures (ca. 2012). OTOH, the system already supplies an 
>> openblas in /usr/lib64, which configure did not find.
>>
>
> you might need the development headers etc for system openblas installed.
> Or, perhaps, they are installed, but pkg-config does not know about it.
>
> Do you have system wide pkg-config installed?
>
>
>
>
>
>>
>> On Monday, May 17, 2021 at 2:32:59 AM UTC-7 dim...@gmail.com wrote:
>>
>>> On Sun, May 16, 2021 at 4:26 PM Richard_L <rich...@lozestech.com> 
>>> wrote: 
>>> > 
>>> > 'make ptestlong' gave the following error summary on a new build from 
>>> source: 
>>> > 
>>> > ---------------------------------------------------------------------- 
>>> > sage -t --long --warn-long 103.3 --random-seed=0 
>>> src/sage/calculus/riemann.pyx # Killed due to illegal instruction 
>>>
>>>
>>> this kind of error indicates that a component is using CPU 
>>> instructions not understood by your CPU. 
>>> It could be either something you installed from the system, or 
>>> something that you built from source as a part of Sage. 
>>> You can look in logs/ptestlong.log to locate more precise errors/stack 
>>> dumps. 
>>>
>>>
>>>
>>>
>>> > sage -t --long --warn-long 103.3 --random-seed=0 
>>> src/sage/schemes/riemann_surfaces/riemann_surface.py # Killed due to 
>>> illegal instruction 
>>> > sage -t --long --warn-long 103.3 --random-seed=0 
>>> src/sage/matrix/matrix2.pyx # Killed due to illegal instruction 
>>> > sage -t --long --warn-long 103.3 --random-seed=0 
>>> src/sage/misc/functional.py # Killed due to illegal instruction 
>>> > sage -t --long --warn-long 103.3 --random-seed=0 
>>> src/sage/calculus/interpolators.pyx # Killed due to illegal instruction 
>>> > sage -t --long --warn-long 103.3 --random-seed=0 
>>> src/sage/matrix/matrix_double_dense.pyx # Killed due to illegal instruction 
>>> > sage -t --long --warn-long 103.3 --random-seed=0 
>>> src/sage/schemes/affine/affine_homset.py # Killed due to illegal 
>>> instruction 
>>> > sage -t --long --warn-long 103.3 --random-seed=0 
>>> src/sage/modular/modform/numerical.py # Killed due to illegal instruction 
>>> > ---------------------------------------------------------------------- 
>>> > Total time for all tests: 3514.1 seconds 
>>> > cpu time: 22425.1 seconds 
>>> > cumulative wall time: 27133.4 seconds 
>>> > make: *** [Makefile:201: ptestlong] Error 16 
>>> > 
>>> > I allowed the package to build Python 3.9.2. The OS is openSUSE Leap 
>>> 15.2. There were 8 threads active during testing. 
>>> > 
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>>>  
>>>
>>>
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>>  
>> <https://groups.google.com/d/msgid/sage-devel/0d3ad5a5-891b-4005-b75a-07c378406d7dn%40googlegroups.com?utm_medium=email&utm_source=footer>
>> .
>>
>

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