probably you need to rebuild at least sagelib.
./sage -f sagelib

On Wed, Jan 15, 2020 at 1:18 PM 'Martin R' via sage-release
<sage-release@googlegroups.com> wrote:
>
> For the record:
>
> ImportError: /usr/lib/x86_64-linux-gnu/libgsl.so.23: undefined symbol: 
> cblas_ctrmv
>
>
> Am Mittwoch, 15. Januar 2020 14:16:39 UTC+1 schrieb Martin R:
>>
>> I'm afraid I was celebrating too early.  make build succeeded, but sage 
>> doesn't start anymore now.  I guess I should start from scratch. :-(
>>
>> Am Mittwoch, 15. Januar 2020 14:07:49 UTC+1 schrieb Martin R:
>>>
>>> BINGO!!!
>>>
>>> Many many many thanks!
>>>
>>> Martin
>>>
>>> Am Mittwoch, 15. Januar 2020 14:00:29 UTC+1 schrieb Dima Pasechnik:
>>>>
>>>> Note that you need to uninstall bzip2, xz, pcre, readline, curl before
>>>> the corresponding system
>>>> versions are picked up by ./configure (of course all this is not
>>>> needed for fresh builds...)
>>>>
>>>> if this does not help please post config.log
>>>>
>>>> On Wed, Jan 15, 2020 at 12:53 PM 'Martin R' via sage-release
>>>> <sage-r...@googlegroups.com> wrote:
>>>> >
>>>> >
>>>> >
>>>> > Am Mittwoch, 15. Januar 2020 13:23:17 UTC+1 schrieb Dima Pasechnik:
>>>> >>
>>>> >> On Wed, Jan 15, 2020 at 12:13 PM 'Martin R' via sage-release
>>>> >> <sage-r...@googlegroups.com> wrote:
>>>> >> >
>>>> >> > Oh dea, this is becoming strange:
>>>> >> >
>>>> >> > The output of configure says that
>>>> >> >
>>>> >> > atlas, openblas, iconv will NOT be installed, but
>>>> >> >
>>>> >> > bzip2-1.0.6-20150304.p0
>>>> >> > readline-6.3.008.p0
>>>> >> > xz-5.2.2.p0
>>>> >> > pcre-8.40.p2
>>>> >> > curl-7.62.0.p0
>>>> >> >
>>>> >> > However, I certainly have bzip2, xz, pcre and curl on my system, and 
>>>> >> > I guess also readline.
>>>> >> >
>>>> >> > Might there be a bug in configure?
>>>> >>
>>>> >> You need development versions of these, see
>>>> >> https://doc.sagemath.org/html/en/installation/source.html#linux-recommended-installation
>>>> >>
>>>> >> So, on Ubuntu:
>>>> >>
>>>> >> libbz2-dev
>>>> >> libreadline-dev (seems to be missing in docs)
>>>> >> liblzma-dev (this is the xz lib, iirc)
>>>> >> libpcre3-dev
>>>> >> libcurl4-openssl-dev
>>>> >
>>>> >
>>>> >>
>>>> >> the last of these, libcurl4-openssl-dev was indeed missing, but 
>>>> >> configure still wants to build r :-(
>>>> >
>>>> >
>>>> > Martin
>>>> >>
>>>> >>
>>>> >>
>>>> >> >
>>>> >> > Martin
>>>> >> >
>>>> >> > Am Mittwoch, 15. Januar 2020 13:00:51 UTC+1 schrieb Dima Pasechnik:
>>>> >> >>
>>>> >> >> On Wed, Jan 15, 2020 at 11:35 AM 'Martin R' via sage-release
>>>> >> >> <sage-r...@googlegroups.com> wrote:
>>>> >> >> >
>>>> >> >> > Am Mittwoch, 15. Januar 2020 12:02:30 UTC+1 schrieb Dima Pasechnik:
>>>> >> >> >>
>>>> >> >> >> On Wed, Jan 15, 2020 at 10:37 AM 'Martin R' via sage-release
>>>> >> >> >> <sage-r...@googlegroups.com> wrote:
>>>> >> >> >> >
>>>> >> >> >> > Thanks again!  It still tries to build R and fails
>>>> >> >> >> >
>>>> >> >> >> > I checked that system R starts, it does (R version 3.4.4)
>>>> >> >> >> Please also make sure that
>>>> >> >> >>
>>>> >> >> >> pkg-config --modversion libR
>>>> >> >> >>
>>>> >> >> >> outputs the version.
>>>> >> >> >>
>>>> >> >> > Yes, it does.
>>>> >> >> >
>>>> >> >> >>
>>>> >> >> >> However there is just no "checking for R" message in your 
>>>> >> >> >> config.log,
>>>> >> >> >> it indicates that there are still remains of R left
>>>> >> >> >> in your installation.
>>>> >> >> >>
>>>> >> >> >> I've opened https://trac.sagemath.org/ticket/29016
>>>> >> >> >> to deal with R being hard to clean away - feel free to try it.
>>>> >> >> >>
>>>> >> >> >> Maybe you also need to run
>>>> >> >> >>
>>>> >> >> >> make r-clean
>>>> >> >> >
>>>> >> >> >
>>>> >> >> > I did that, it says that there is no legacy uninstaller for r, and 
>>>> >> >> > that there is nothing to do.  I checked for the files in the 
>>>> >> >> > ticket, but none of them exists. :-(
>>>> >> >> >
>>>> >> >> > The config.log contains the lines
>>>> >> >> >
>>>> >> >> > configure:18950: checking installing any of atlas openblas iconv 
>>>> >> >> > readline bzip2 xz pcre curl?
>>>> >> >> > configure:18954: result: yes; install r as well
>>>> >> >> >
>>>> >> >> > but I do not know how to find out which of those (atlas openblas 
>>>> >> >> > iconv readline bzip2 xz pcre curl) is the problem.
>>>> >> >>
>>>> >> >> The easiest is to look at the output of ./configure
>>>> >> >> It should contain lines like
>>>> >> >>
>>>> >> >> atlas-3.10.2.p3 will not be installed (configure check)
>>>> >> >>
>>>> >> >> for each of the packages in that list.
>>>> >> >> So for any of these that are not marked this way, please install the
>>>> >> >> corresponding system package
>>>> >> >> and re-run configure.
>>>> >> >>
>>>> >> >>
>>>> >> >>
>>>> >> >> >
>>>> >> >> > Martin
>>>> >> >> >
>>>> >> >> > --
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>>>> >> >> > send an email to sage-r...@googlegroups.com.
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>>>> >> >> > https://groups.google.com/d/msgid/sage-release/5d105000-cea2-48a5-8840-aeb405a6cb71%40googlegroups.com.
>>>> >> >
>>>> >> > --
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>
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