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fresh git cloned repository. Compilation fails with the spurious error as in https://trac.sagemath.org/ticket/28513. Running ./sage crashes with the error

ImportError: /home/user/sage/local/lib/liblinbox.so.0: undefined symbol: GOMP_loop_ull_maybe_nonmonotonic_runtime_next

But the symbols are there:

$ nm /usr/lib/libgomp.so | grep GOMP_loop_ull_maybe_
0000000000010070 T GOMP_loop_ull_maybe_nonmonotonic_runtime_next
000000000000f210 T GOMP_loop_ull_maybe_nonmonotonic_runtime_start

fresh git cloned repository. Compilation fails with the spurious error as in https://trac.sagemath.org/ticket/28513. Running ./sage crashes with the error

ImportError: /home/user/sage/local/lib/liblinbox.so.0: undefined symbol: GOMP_loop_ull_maybe_nonmonotonic_runtime_next

But the symbols are there:

$ nm /usr/lib/libgomp.so | grep GOMP_loop_ull_maybe_
0000000000010070 T GOMP_loop_ull_maybe_nonmonotonic_runtime_next
000000000000f210 T GOMP_loop_ull_maybe_nonmonotonic_runtime_start

$uname -a 
Linux host 5.3.5-arch1-1-ARCH #1 SMP PREEMPT Mon Oct 7 19:03:08 UTC 2019 x86_64 GNU/Linux
$ gcc --version
gcc (GCC) 9.2.0

fresh git cloned repository. Compilation fails with the spurious error as in https://trac.sagemath.org/ticket/28513. Running ./sage crashes with the error

ImportError: /home/user/sage/local/lib/liblinbox.so.0: undefined symbol: GOMP_loop_ull_maybe_nonmonotonic_runtime_next

But the symbols are there:

$ nm /usr/lib/libgomp.so | grep GOMP_loop_ull_maybe_
0000000000010070 T GOMP_loop_ull_maybe_nonmonotonic_runtime_next
000000000000f210 T GOMP_loop_ull_maybe_nonmonotonic_runtime_start

This is on Arch

$uname -a 
Linux host 5.3.5-arch1-1-ARCH #1 SMP PREEMPT Mon Oct 7 19:03:08 UTC 2019 x86_64 GNU/Linux
$ gcc --version
gcc (GCC) 9.2.0