I am having trouble installing pyipopt on ubuntu 12.04. During linking, I receive the error:
/usr/bin/ld: cannot find -lcoinhsl
Even though I know that this library is installed and the .so and .la files are available in /home/mostafa/MyBuilds/CoinIpopt/build/lib/
does anyone have a solution for this?
below is the complete return of running setup.py build:
root@ubuntu:~/MyBuilds/pyipopt# sudo python setup.py build running build running build_ext building 'pyipopt' extension gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/lib/python2.7/dist-packages/numpy/core/include -I/home/mostafa/MyBuilds/CoinIpopt/build/include/coin/ -I/usr/include/python2.7 -c src/callback.c -o build/temp.linux-x86_64-2.7/src/callback.o gcc -pthread -fno-strict-aliasing -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -fPIC -I/usr/lib/python2.7/dist-packages/numpy/core/include -I/home/mostafa/MyBuilds/CoinIpopt/build/include/coin/ -I/usr/include/python2.7 -c src/pyipopt.c -o build/temp.linux-x86_64-2.7/src/pyipopt.o src/pyipopt.c: In function ‘set_intermediate_callback’: src/pyipopt.c:452:15: warning: variable ‘myowndata’ set but not used [-Wunused-but-set-variable] gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relrobuild/temp.linux-x86_64-2.7/src/callback.o build/temp.linux-x86_64-2.7/src/pyipopt.o -L/home/mostafa/MyBuilds/CoinIpopt/build/lib/ -lipopt -lblas -lcoinhsl -lcoinmetis -llapack -ldl -lm -o build/lib.linux-x86_64-2.7/pyipopt.so -Wl,--rpath -Wl,/home/mostafa/MyBuilds/CoinIpopt/build/lib/ /usr/bin/ld: cannot find -lcoinhsl collect2: ld returned 1 exit status error: command 'gcc' failed with exit status 1
-Ldir
Add directory dir to the list of directories to be searched for -l.
You may install your coinhsl library in one of your standard libraries directories and run 'ldconfig` before doing your ppyipopt install
I had a similar problem with another library and the reason why it didn't found it, was that I didn't run the make install (after running ./configure and make) for that library. The make install may require root privileges (in this case use: sudo make install). After running the make install you should have the so files in the correct folder, i.e. here /usr/local/lib and not in the folder mentioned by you.
you can add the Path to coinhsl lib to LD_LIBRARY_PATH variable. May be that will help.
export LD_LIBRARY_PATH=/xx/yy/zz:$LD_LIBRARY_PATH
where /xx/yy/zz represent the path to coinhsl lib.
来源：https://stackoverflow.com/questions/12107422/ld-cannot-find-llibrary