# 3.7.8 build problem 'cannot find -lcblas'

**URL:** <https://www.ruby-forum.com/t/3-7-8-build-problem-cannot-find-lcblas/243000>\
**Category:** GNU Radio\
**Created:** [August 14, 2015, 1:51am UTC](https://www.ruby-forum.com/t/3-7-8-build-problem-cannot-find-lcblas/243000 "2015-08-14T01:51:15Z")\
**Posts on this page:** 8\
**Page:** 1

<div class="post-metadata">

**Author:** ![Sadaf\_N](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/858c86/32.png) [@Sadaf\_N](https://www.ruby-forum.com/u/Sadaf_N)\
**Post date:** [August 14, 2015, 1:51am UTC](https://www.ruby-forum.com/t/3-7-8-build-problem-cannot-find-lcblas/243000/1 "2015-08-14T01:51:15Z")

</div>

Trying to update our Mageia package to 3.7.8 using the release tarball,  
we are hitting this:

[70%] Building CXX object  
gr-wavelet/lib/CMakeFiles/gnuradio-wavelet.dir/wvps\_ff\_impl.cc.o  
Linking CXX shared library libgnuradio-wavelet-3.7.8.so  
/usr/bin/ld: cannot find -lcblas  
collect2: error: ld returned 1 exit status

Any ideas?

libatlas-devel is installed.

---

<div class="post-metadata">

**Author:** ![aramisbear](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/f17d59/32.png) [@aramisbear](https://www.ruby-forum.com/u/aramisbear)\
**Post date:** [August 14, 2015, 4:47am UTC](https://www.ruby-forum.com/t/3-7-8-build-problem-cannot-find-lcblas/243000/2 "2015-08-14T04:47:41Z")

</div>

$ dpkg -S /usr/lib/libcblas.\*  
libatlas-base-dev: /usr/lib/libcblas.a  
libatlas-base-dev: /usr/lib/libcblas.so  
libatlas3-base: /usr/lib/libcblas.so.3  
libatlas3-base: /usr/lib/libcblas.so.3gf

$ dpkg -S /usr/lib/pkgconfig/_blas_pc  
libatlas-base-dev: /usr/lib/pkgconfig/blas-atlas.pc  
libblas-dev: /usr/lib/pkgconfig/blas-netlib.pc  
libopenblas-dev: /usr/lib/pkgconfig/blas-openblas.pc  
dpkg-query: no path found matching pattern /usr/lib/pkgconfig/blas.pc  
libopenblas-dev: /usr/lib/pkgconfig/lapack-openblas.pc

1. is the correct package installed?
2. is there a libcblas.\* in your linker path?
3. did cmake not find the right pkgconfig file?
4. you could rerun make with more verbose output (add “V=1”) to see  
what exactly failed.

On Thu, Aug 13, 2015 at 4:17 PM, Barry J. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
wrote:

> libatlas-devel is installed.
> 
> * * *
> 
> Discuss-gnuradio mailing list  
> [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
> [Discuss-gnuradio Info Page](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio)

–  
GDB has a ‘break’ feature; why doesn’t it have ‘fix’ too?

---

<div class="post-metadata">

**Author:** ![aramisbear](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/f17d59/32.png) [@aramisbear](https://www.ruby-forum.com/u/aramisbear)\
**Post date:** [August 14, 2015, 12:39pm UTC](https://www.ruby-forum.com/t/3-7-8-build-problem-cannot-find-lcblas/243000/3 "2015-08-14T12:39:58Z")

</div>

Thanks for your reply.

On 14/08/15 03:46, Chris K. wrote:

> dpkg-query: no path found matching pattern /usr/lib/pkgconfig/blas.pc  
> libopenblas-dev: /usr/lib/pkgconfig/lapack-openblas.pc
> 
> 1. is the correct package installed?

[baz@localhost gnuradio]$ urpmf /usr/lib64/atlas/libcblas.so  
lib64atlas3-x86\_64:/usr/lib64/atlas/libcblas.so.3  
lib64atlas3-x86\_64:/usr/lib64/atlas/libcblas.so.3.0  
libatlas-x86\_64-devel:/usr/lib64/atlas/libcblas.so \<\<=====

[baz@localhost gnuradio]$ urpmq --provides libatlas-x86\_64-devel  
libatlas-devel[== 3.8.4-6.mga5] \<\<==provided by libatlas-devel  
libatlas-x86\_64-devel[== 3.8.4-6.mga5]  
libatlas-x86\_64-devel(x86-64)[== 3.8.4-6.mga5]  
[baz@localhost gnuradio]$

> 1. is there a libcblas.\* in your linker path?  
> [root@localhost baz]# ldconfig -p | grep cblas  
> libptcblas.so.3 (libc6,x86-64) =\> /usr/lib64/atlas/libptcblas.so.3  
> libptcblas.so (libc6,x86-64) =\> /usr/lib64/atlas/libptcblas.so  
> libgslcblas.so.0 (libc6,x86-64) =\> /lib64/libgslcblas.so.0  
> libgslcblas.so (libc6,x86-64) =\> /lib64/libgslcblas.so  
> libcblas.so.3 (libc6,x86-64) =\> /usr/lib64/atlas/libcblas.so.3  
> libcblas.so (libc6,x86-64) =\> /usr/lib64/atlas/libcblas.so

> 1. did cmake not find the right pkgconfig file?  
> I don’t see anything to say either way - and I’m not very familiar with  
> cmake.  
> grepping build dir for cblas finds:

[baz@localhost build]$ grep -r cblas  
gr-wavelet/swig/CMakeFiles/\_wavelet\_swig.dir/link.txt:/usr/bin/c++  
-fPIC -O2 -g -pipe -Wformat -Werror=format-security  
-Wp,-D\_FORTIFY\_SOURCE=2 -fstack-protector --param=ssp-buffer-size=4  
-fPIC -fvisibility=hidden -Wsign-compare -Wall -Wno-uninitialized -O3  
-DNDEBUG -Wl,–as-needed -Wl,-z,relro -Wl,-O1 -Wl,–build-id  
-Wl,–enable-new-dtags -shared -Wl,-soname,\_wavelet\_swig.so -o  
\_wavelet\_swig.so  
CMakeFiles/\_wavelet\_swig.dir/wavelet\_swigPYTHON\_wrap.cxx.o -lm -lpthread  
-lpython2.7 ../lib/libgnuradio-wavelet-3.7.8.so.0.0.0 -L/usr/lib64/atlas  
-lgsl -lcblas -lm ../../gr-blocks/lib/libgnuradio-blocks-3.7.8.so.0.0.0  
../../gnuradio-runtime/lib/libgnuradio-runtime-3.7.8.so.0.0.0  
../../gnuradio-runtime/lib/pmt/libgnuradio-pmt-3.7.8.so.0.0.0 -lrt  
../../volk/lib/libvolk.so.1.0.2 -ldl -lorc-0.4 -lboost\_date\_time  
-lboost\_program\_options -lboost\_filesystem -lboost\_system -lboost\_thread  
-lgsl -lcblas -lm -lpthread  
gr-wavelet/lib/CMakeFiles/gnuradio-wavelet.dir/link.txt:/usr/bin/c++  
-fPIC -O2 -g -pipe -Wformat -Werror=format-security  
-Wp,-D\_FORTIFY\_SOURCE=2 -fstack-protector --param=ssp-buffer-size=4  
-fPIC -fvisibility=hidden -Wsign-compare -Wall -Wno-uninitialized -O3  
-DNDEBUG -Wl,–no-as-needed -Wl,–as-needed -Wl,–no-undefined  
-Wl,-z,relro -Wl,-O1 -Wl,–build-id -Wl,–enable-new-dtags -shared  
-Wl,-soname,libgnuradio-wavelet-3.7.8.so.0.0.0 -o  
libgnuradio-wavelet-3.7.8.so.0.0.0  
CMakeFiles/gnuradio-wavelet.dir/squash\_ff\_impl.cc.o  
CMakeFiles/gnuradio-wavelet.dir/wavelet\_ff\_impl.cc.o  
CMakeFiles/gnuradio-wavelet.dir/wvps\_ff\_impl.cc.o -lm -lpthread  
../../gnuradio-runtime/lib/libgnuradio-runtime-3.7.8.so.0.0.0  
../../gr-blocks/lib/libgnuradio-blocks-3.7.8.so.0.0.0 -lboost\_date\_time  
-lboost\_program\_options -lboost\_filesystem -lboost\_system -lboost\_thread  
-lgsl -lcblas -lm  
../../gnuradio-runtime/lib/libgnuradio-runtime-3.7.8.so.0.0.0  
../../gnuradio-runtime/lib/pmt/libgnuradio-pmt-3.7.8.so.0.0.0 -lrt  
-lboost\_date\_time -lboost\_program\_options -lboost\_filesystem  
-lboost\_system -lboost\_thread ../../volk/lib/libvolk.so.1.0.2 -ldl  
-lorc-0.4 -lm -lpthread  
CMakeCache.txt:\_wavelet\_swig\_LIB\_DEPENDS:STATIC=general;m;general;pthread;general;/usr/lib64/libpython2.7.so;general;gnuradio-wavelet;general;-L/usr/lib64/atlas;general;-lgsl;general;-lcblas;general;-lm;  
CMakeCache.txt:gnuradio-wavelet\_LIB\_DEPENDS:STATIC=general;m;general;pthread;general;gnuradio-runtime;general;gnuradio-blocks;general;/usr/lib64/libboost\_date\_time.so;general;/usr/lib64/libboost\_program\_options.so;general;/usr/lib64/libboost\_filesystem.so;general;/usr/lib64/libboost\_system.so;general;/usr/lib64/libboost\_thread.so;general;gsl;general;cblas;general;m;  
CMakeCache.txt:FIND\_PACKAGE\_MESSAGE\_DETAILS\_GSL:INTERNAL=[gsl;cblas;m][/usr/include][/usr/lib64][v()]  
CMakeCache.txt:GSL\_LDFLAGS:INTERNAL=-L/usr/lib64/atlas;-lgsl;-lcblas;-lm  
CMakeCache.txt:GSL\_LIBRARIES:INTERNAL=gsl;cblas;m  
CMakeCache.txt:GSL\_STATIC\_LDFLAGS:INTERNAL=-L/usr/lib64/atlas;-lgsl;-lcblas;-lm  
CMakeCache.txt:GSL\_STATIC\_LIBRARIES:INTERNAL=gsl;cblas;m

> 1. you could rerun make with more verbose output (add “V=1”) to see  
> what exactly failed.

With %cmake -DCMAKE\_VERBOSE\_MAKEFILE=ON I get the following which may be  
of use, but I can’t see it, unless it’s to do with the --no-as-needed  
which seems to be reversed later. This is probably done by our %cmake  
macro.

make[2]: Entering directory  
‘/home/baz/BLD\_Mga6\_5/gnuradio/BUILD/gnuradio-3.7.8/build’  
Linking CXX shared library libgnuradio-wavelet-3.7.8.so  
cd  
/home/baz/BLD\_Mga6\_5/gnuradio/BUILD/gnuradio-3.7.8/build/gr-wavelet/lib  
&& /usr/bin/cmake -E cmake\_link\_script  
CMakeFiles/gnuradio-wavelet.dir/link.txt --verbose=1  
/usr/bin/c++ -fPIC -O2 -g -pipe -Wformat -Werror=format-security  
-Wp,-D\_FORTIFY\_SOURCE=2 -fstack-protector --param=ssp-buffer-size=4  
-fPIC -fvisibility=hidden -Wsign-compare -Wall -Wno-uninitialized -O3  
-DNDEBUG -Wl,–no-as-needed -Wl,–as-needed -Wl,–no-undefined  
-Wl,-z,relro -Wl,-O1 -Wl,–build-id -Wl,–enable-new-dtags -shared  
-Wl,-soname,libgnuradio-wavelet-3.7.8.so.0.0.0 -o  
libgnuradio-wavelet-3.7.8.so.0.0.0  
CMakeFiles/gnuradio-wavelet.dir/squash\_ff\_impl.cc.o  
CMakeFiles/gnuradio-wavelet.dir/wavelet\_ff\_impl.cc.o  
CMakeFiles/gnuradio-wavelet.dir/wvps\_ff\_impl.cc.o -lm -lpthread  
../../gnuradio-runtime/lib/libgnuradio-runtime-3.7.8.so.0.0.0  
../../gr-blocks/lib/libgnuradio-blocks-3.7.8.so.0.0.0 -lboost\_date\_time  
-lboost\_program\_options -lboost\_filesystem -lboost\_system -lboost\_thread  
-lgsl -lcblas -lm  
../../gnuradio-runtime/lib/libgnuradio-runtime-3.7.8.so.0.0.0  
../../gnuradio-runtime/lib/pmt/libgnuradio-pmt-3.7.8.so.0.0.0 -lrt  
-lboost\_date\_time -lboost\_program\_options -lboost\_filesystem  
-lboost\_system -lboost\_thread ../../volk/lib/libvolk.so.1.0.2 -ldl  
-lorc-0.4 -lm -lpthread  
/usr/bin/ld: cannot find -lcblas  
collect2: error: ld returned 1 exit status  
gr-wavelet/lib/CMakeFiles/gnuradio-wavelet.dir/build.make:154: recipe  
for target ‘gr-wavelet/lib/libgnuradio-wavelet-3.7.8.so.0.0.0’ failed  
make[2]: \*\*\* [gr-wavelet/lib/libgnuradio-wavelet-3.7.8.so.0.0.0] Error 1

---

<div class="post-metadata">

**Author:** ![aramisbear](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/f17d59/32.png) [@aramisbear](https://www.ruby-forum.com/u/aramisbear)\
**Post date:** [August 15, 2015, 1:01am UTC](https://www.ruby-forum.com/t/3-7-8-build-problem-cannot-find-lcblas/243000/4 "2015-08-15T01:01:22Z")

</div>

I checked without the %cmake macro so the --no-as-needed did not get  
overridden and the error is the same:

Linking CXX shared library libgnuradio-wavelet-3.7.8.so  
cd  
/home/baz/BLD\_Mga6\_5/gnuradio/BUILD/gnuradio-3.7.8/build/gr-wavelet/lib  
&& /usr/bin/cmake -E cmake\_link\_script  
CMakeFiles/gnuradio-wavelet.dir/link.txt --verbose=1  
/usr/bin/c++ -fPIC -fvisibility=hidden -Wsign-compare -Wall  
-Wno-uninitialized -O3 -DNDEBUG -Wl,–no-as-needed -shared  
-Wl,-soname,libgnuradio-wavelet-3.7.8.so.0.0.0 -o  
libgnuradio-wavelet-3.7.8.so.0.0.0  
CMakeFiles/gnuradio-wavelet.dir/squash\_ff\_impl.cc.o  
CMakeFiles/gnuradio-wavelet.dir/wavelet\_ff\_impl.cc.o  
CMakeFiles/gnuradio-wavelet.dir/wvps\_ff\_impl.cc.o -lm -lpthread  
…/…/gnuradio-runtime/lib/libgnuradio-runtime-3.7.8.so.0.0.0  
…/…/gr-blocks/lib/libgnuradio-blocks-3.7.8.so.0.0.0 -lboost\_date\_time  
-lboost\_program\_options -lboost\_filesystem -lboost\_system -lboost\_thread  
-lgsl -lcblas -lm  
…/…/gnuradio-runtime/lib/libgnuradio-runtime-3.7.8.so.0.0.0  
…/…/gnuradio-runtime/lib/pmt/libgnuradio-pmt-3.7.8.so.0.0.0 -lrt  
-lboost\_date\_time -lboost\_program\_options -lboost\_filesystem  
-lboost\_system -lboost\_thread …/…/volk/lib/libvolk.so.1.0.2 -ldl  
-lorc-0.4 -lm -lpthread  
-Wl,-rpath,/home/baz/BLD\_Mga6\_5/gnuradio/BUILD/gnuradio-3.7.8/build/gnuradio-runtime/lib:/home/baz/BLD\_Mga6\_5/gnuradio/BUILD/gnuradio-3.7.8/build/gr-blocks/lib:/home/baz/BLD\_Mga6\_5/gnuradio/BUILD/gnuradio-3.7.8/build/gnuradio-runtime/lib/pmt:/home/baz/BLD\_Mga6\_5/gnuradio/BUILD/gnuradio-3.7.8/build/volk/lib:

/usr/bin/ld: cannot find -lcblas

---

<div class="post-metadata">

**Author:** ![aramisbear](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/f17d59/32.png) [@aramisbear](https://www.ruby-forum.com/u/aramisbear)\
**Post date:** [August 18, 2015, 12:49pm UTC](https://www.ruby-forum.com/t/3-7-8-build-problem-cannot-find-lcblas/243000/5 "2015-08-18T12:49:52Z")

</div>

Install blas, lapack or something that supplies the missing library.

Philip

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<div class="post-metadata">

**Author:** ![aramisbear](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/f17d59/32.png) [@aramisbear](https://www.ruby-forum.com/u/aramisbear)\
**Post date:** [August 18, 2015, 9:47am UTC](https://www.ruby-forum.com/t/3-7-8-build-problem-cannot-find-lcblas/243000/6 "2015-08-18T09:47:37Z")

</div>

Ping?

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<div class="post-metadata">

**Author:** ![aramisbear](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/f17d59/32.png) [@aramisbear](https://www.ruby-forum.com/u/aramisbear)\
**Post date:** [August 23, 2015, 5:49pm UTC](https://www.ruby-forum.com/t/3-7-8-build-problem-cannot-find-lcblas/243000/7 "2015-08-23T17:49:41Z")

</div>

On 18/08/15 08:58, Philip B. wrote:

> > [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
> > [Discuss-gnuradio Info Page](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio)

Hi Philip,  
Thanks for your reply. Sorry for the delay.

AFAICT the apparently missing library is libcblas.so which is only  
provided by libatlas-devel in Mageia which _is_ being installed.

However 3.7.5.1 builds fine without this so is this a new require?

Barry

---

<div class="post-metadata">

**Author:** ![aramisbear](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/f17d59/32.png) [@aramisbear](https://www.ruby-forum.com/u/aramisbear)\
**Post date:** [August 26, 2015, 11:04am UTC](https://www.ruby-forum.com/t/3-7-8-build-problem-cannot-find-lcblas/243000/8 "2015-08-26T11:04:29Z")

</div>

On 23/08/15 16:48, Barry J. wrote:

> > > Discuss-gnuradio mailing list  
> > > However 3.7.5.1 builds fine without this so is this a new require?
> 
> Barry
> 
> * * *
> 
> Discuss-gnuradio mailing list  
> [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
> [Discuss-gnuradio Info Page](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio)

OK, exporting LDFLAGS=“$LDFLAGS -L%{\_libdir}/atlas” fixes it for now,  
but maybe the cmake setup in gnuradio could handle this better?

Barry