Building sage-9.0 fails in Ubuntu

[E Poen]

I'm running Ubuntu 18.04, and wanted to build Sage 9.0 from source. However, I get the errors in eclib, singular and suitesparse packages:

**eclib:**

/usr/bin/ld: _ZN3NTL8ZZ_pInfoE: TLS reference in .libs/polys.o mismatches non-TLS reference in /usr/lib/gcc/x86_64-linux-gnu/7/../../../../lib/libflint.so

/usr/lib/gcc/x86_64-linux-gnu/7/../../../../lib/libflint.so: error adding symbols: Bad value

collect2: error: ld returned 1 exit status

Makefile:471: recipe for target 'libec.la' failed

make[5]: *** [libec.la] Error 1

make[5]: Leaving directory '/home/myuser/app/sage-9.0/local/var/tmp/sage/build/eclib-20190909/src/libsrc'

Makefile:465: recipe for target 'all-recursive' failed

make[4]: *** [all-recursive] Error 1

make[4]: Leaving directory '/home/myuser/app/sage-9.0/local/var/tmp/sage/build/eclib-20190909/src'

**singular:**

/usr/bin/ld: _ZN3NTL9ZZ_pEInfoE: TLS reference in .libs/NTLconvert.o mismatches non-TLS reference in /usr/lib/gcc/x86_64-linux-gnu/7/../../../../lib/libflint.so

/usr/lib/gcc/x86_64-linux-gnu/7/../../../../lib/libflint.so: error adding symbols: Bad value

collect2: error: ld returned 1 exit status

Makefile:1063: recipe for target 'libfactory.la' failed

make[8]: *** [libfactory.la] Error 1

make[8]: Leaving directory '/home/myuser/app/sage-9.0/local/var/tmp/sage/build/singular-4.1.1p2.p0/src/factory'

Makefile:1271: recipe for target 'all-recursive' failed

**suitsparse:**

gcc: error: /usr/local/cuda/lib64/libcublas.so: No such file or directory

Makefile:541: recipe for target '/home/myuser/app/sage-9.0/local/var/tmp/sage/build/suitesparse-5.6.0/inst/home/myuser/app/sage-9.0/local/lib/libcholmod.so.3.0.13' failed

make[6]: *** [/home/myuser/app/sage-9.0/local/var/tmp/sage/build/suitesparse-5.6.0/inst/home/myuser/app/sage-9.0/local/lib/libcholmod.so.3.0.13] Error 1

I had NTL and FLINT manually installed before. So, I tried to also configure with and without the option "--without-system-ntl". However, I guess the problem here 

is not NTL but rather FLINT. Any ideas what the actual problem is?