Can't find -lgfortran while installing OpenBLAS from source

[AmNotGod]

Hey, I want to use OpenBLAS to accelerate my deep learning program. However, there is something wrong when I tried to install OpenBLAS from source.

---

cblas_zher2 PASSED THE TESTS OF ERROR-EXITS

cblas_zher2 PASSED THE COMPUTATIONAL TESTS ( 577 CALLS)
cblas_zher2 PASSED THE COMPUTATIONAL TESTS ( 577 CALLS)

cblas_zhpr2 PASSED THE TESTS OF ERROR-EXITS

cblas_zhpr2 PASSED THE COMPUTATIONAL TESTS ( 577 CALLS)
cblas_zhpr2 PASSED THE COMPUTATIONAL TESTS ( 577 CALLS)

END OF TESTS
make[1]:正在离开目录 /home/amax/temp/OpenBLAS-0.2.14/ctest' make[1]: 正在进入目录/home/amax/temp/OpenBLAS-0.2.14/exports'
perl ./gensymbol linktest x86_64 _ 0 0 0 0 0 0 "" "" > linktest.c
gcc -O2 -Wall -m64 -DF_INTERFACE_GFORT -fPIC -DSMP_SERVER -DNO_WARMUP -DMAX_CPU_NUMBER=24 -DASMNAME= -DASMFNAME=_ -DNAME=_ -DCNAME= -DCHAR_NAME="_" -DCHAR_CNAME="" -DNO_AFFINITY -I.. -shared -o ../libopenblas_sandybridgep-r0.2.14.so
-Wl,--whole-archive ../libopenblas_sandybridgep-r0.2.14.a -Wl,--no-whole-archive
-Wl,-soname,libopenblas.so.0 -lm -lpthread -lgfortran -lm -lpthread -lgfortran
/usr/bin/ld: cannot find -lgfortran
collect2: ld returned 1 exit status
make[1]: *** [../libopenblas_sandybridgep-r0.2.14.so] 错误 1
make[1]:正在离开目录 `/home/amax/temp/OpenBLAS-0.2.14/exports'
make: *** [shared] 错误 2
amax@amaxa311:/temp/OpenBLAS-0.2.14$ gcc
gcc: fatal error: no input files
compilation terminated.
amax@amaxa311:/temp/OpenBLAS-0.2.14$ gcc --version
gcc (Ubuntu/Linaro 4.6.4-6ubuntu2) 4.6.4
Copyright (C) 2011 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

---

The gcc version on my computer is 4.64 and I am really sure that gfortran has been installed.

---

/usr/bin/gfortran
/usr/bin/gfortran-4.8
/usr/bin/x86_64-linux-gnu-gfortran
/usr/bin/x86_64-linux-gnu-gfortran-4.8
/usr/lib/gcc/x86_64-linux-gnu/4.8/libgfortran.a
/usr/lib/gcc/x86_64-linux-gnu/4.8/libgfortran.so
/usr/lib/gcc/x86_64-linux-gnu/4.8/libgfortran.spec
/usr/lib/gcc/x86_64-linux-gnu/4.8/libgfortranbegin.a
/usr/lib/python2.7/dist-packages/numpy/distutils/mingw/gfortran_vs2003_hack.c
/usr/lib/python3/dist-packages/numpy/distutils/mingw/gfortran_vs2003_hack.c
/usr/lib/scons/SCons/Tool/gfortran.py
/usr/lib/scons/SCons/Tool/gfortran.pyc
/usr/lib/x86_64-linux-gnu/libgfortran.so.3
/usr/lib/x86_64-linux-gnu/libgfortran.so.3.0.0

---

Any help will be appliciated!

[xianyi]

@AmNotGod , I think you don't need LAPACK functions. Thus, please make NO_LAPACK=1 without link -lgfortran.

[AmNotGod]

It is really helpful. I have solved my problem, thank you so much!

[tcfuji]

Ran into this problem too. Should NO_LAPACK=1 be the default?

[martin-frbg]

@tcfuji: If you run into this problem, there is something wrong with your fortran compiler environment (probably missing a seperate gfortran-devel or libgfortran-dev package). NO_LAPACK makes sense as a workaround when it is clear that the only project you need openblas for does not require any of the lapack functions (the only components you would need a working fortran compiler for).