[Debian-science-sagemath] Sagemath Build-Depends backported - unfortunately build error (Was: Help needed to backport ipywidgets ... (Was: Backporting sagemath))

[Andreas Tille]

Hi again,

On Wed, Apr 12, 2017 at 11:23:55PM +0100, Tobias Hansen wrote:
> [sagelib-7.4] /usr/bin/ld:
> /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/libgslcblas.a(sgemm.o):
> relocation R_X86_64_32 against `.rodata.str1.1' can not be used when
> making a shared object; recompile with -fPIC
> [sagelib-7.4]
> /usr/lib/gcc/x86_64-linux-gnu/4.9/../../../x86_64-linux-gnu/libgslcblas.a:
> error adding symbols: Bad value
> [sagelib-7.4] collect2: error: ld returned 1 exit status
> 
> The problem seems to be that the shared library libgslcblas0 was removed
> from the package gsl in version 2.3+dfsg-1~bpo8+2 so now the static
> library libgslcblas.a is used which does not work. ("recompile with
> -fPIC" means use the shared library.)

OK, I've uploaded a fix for gsl

diff -Nru gsl-2.3+dfsg/debian/changelog gsl-2.3+dfsg/debian/changelog
--- gsl-2.3+dfsg/debian/changelog       2017-04-04 14:44:59.000000000 +0200
+++ gsl-2.3+dfsg/debian/changelog       2017-04-13 09:40:55.000000000 +0200
@@ -1,3 +1,9 @@
+gsl (2.3+dfsg-1~bpo8+3) jessie-backports; urgency=medium
+
+  * Fix dangling symlink for libgslcblas.so
+
+ -- Andreas Tille <tille at debian.org>  Thu, 13 Apr 2017 09:20:21 +0200
+
 gsl (2.3+dfsg-1~bpo8+2) jessie-backports; urgency=medium

   * Remove libgslcblas0 and depend on libgsl0dbl
diff -Nru gsl-2.3+dfsg/debian/rules gsl-2.3+dfsg/debian/rules
--- gsl-2.3+dfsg/debian/rules   2016-09-04 00:52:40.000000000 +0200
+++ gsl-2.3+dfsg/debian/rules   2017-04-13 09:55:12.000000000 +0200
@@ -265,6 +265,9 @@
        dh_testroot
         #dh_installdebconf
        dh_link
+       # libgsl0dbl package provides libgslcblas.so.0.0.0 in non-multiarch dir
+       # provide symlink to make sure libgslcblas.so will not be a dangling symlink
+       dh_link -p$(devpack) /usr/lib/libgslcblas.so.0.0.0 /usr/lib/$(DEB_HOST_MULTIARCH)/libgslcblas.so.0.0.0
        dh_installdocs
         #dh_installexamples
         #dh_installmenu


which fixes the libgslcblas.so not found issue.  After adapting
versioned Build-Depends of sagemath backport the build went way further
but failed again (see attached log).

Thanks for all your help

       Andreas.

-- 
http://fam-tille.de
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