Undefined reference to '_gfortran_concat_string'

[johnmoore4]

Hi developers,

I am trying to link my binary statically (i.e. with the -static flag in gcc) to OpenBLAS, but I get the following error (among others):

/home/john/local/OpenBLAS/install/lib/libopenblas.a(sgesvd.o): In function sgesvd_': sgesvd.f:(.text+0x35f): undefined reference to_gfortran_concat_string'

I'm compiling with the following linking flags:
"-static-libgfortran -static-libgcc -static-libstdc++ -lpthread -Wl,--whole-archive -libverbs -Wl,--no-whole-archive -ldl"

I've tried everything I can think of, and hav been stuck on this issue for days. If I simply remove -static-libgfortran and replace it with -lgfortran, everything works fine. So, it seems like the dynamic version of libgfortran is linked to some other libraries.

I have verified that I have the static version of the libraries listed in the above linking command, so that shouldn't be the issue. Also, this only seems to effect the LAPACK routines, not BLAS.

Do you have any idea what might be going on or suggestions for me to try?

I'm compiling with gcc 4.8.1 un Ubuntu 14.04, if that helps.

Thank you for your time!

[tkelman]

@johnmoore4 the -static-libgfortran flag hasn't worked properly for a while, because libgfortran depends on libquadmath since gcc somewhere around 4.5. Try spelling out the full paths to libgfortran.a and libquadmath.a.

[johnmoore4]

I've tried explicitly linking to the static libraries, and still the same issue. After looking into it a bit more, I found that I had several versions of the gcc/gfortran libraries installed. Therefore, when I used the -lgfortran flag without the -static flag, the compiler was linking to an older version of the static library (i.e. gcc 4.3) which appears to work with openblas.

However, the newer versions of gfortran (4.5+) do not seem to be compatible with OpenBLAS due to deprecated references to _gfortran_concat_string. Can someone else confirm this?

[xianyi]

@johnmoore4 ,
Why not just use -static as following gcc -static -O3 -o test test.c /your_path/OpenBLAS/libopenblas.a -lgfortran -lpthread -lm ?

[xianyi]

I link the test with /usr/lib/gcc/x86_64-linux-gnu/4.8/libgfortran.a, which works fine.

gcc -o test  test.c /your_path/OpenBLAS/libopenblas.a /usr/lib/gcc/x86_64-linux-gnu/4.8/libgfortran.a -static-libgcc -static-libstdc++  -lpthread -Wl,--no-whole-archive -ldl -lm

[zh794390558]

maybe gcc/gfortrian version not match openblas needed? gcc-8 is work for may case.