[Discuss-gnuradio] Compiling standalone apps

[Dan Halperin]

Hi,

I must be doing something really stupid. I'm trying to figure out how to 
compile against the C++ libraries.

I copied test_usrp_standard_tx.cc, timestuff.h, and timestuff.c to a new 
folder, then I compiled the application using

   g++ test_usrp_standard_tx.cc timestuff.c -lusrp -Wall

and that created an a.out file just fine. However, when I run ./a.out, I 
get the following error:

   ./a.out: error while loading shared libraries: libusrp.so.0: cannot 
open shared object file: No such file or directory

The outputs of the relevant locates are:

$ locate usrp_standard.h
/usr/local/include/usrp_standard.h
$ locate usrp_bytesex.h
/usr/local/include/usrp_bytesex.h
$ locate libusrp
/usr/local/lib/libusrp.so
/usr/local/lib/libusrp.so.0
/usr/local/lib/libusrp.la
/usr/local/lib/libusrp.so.0.0.0

/usr/local/lib looks like this:

$ ls -l
total 20292
-rwxr-xr-x  1 root root      851 Oct 10 13:13 libgnuradio-core.la
-rwxr-xr-x  1 root root      919 Oct 10 13:13 libgnuradio-core-qa.la
lrwxrwxrwx  1 root root       28 Oct 10 13:13 libgnuradio-core-qa.so -> 
libgnuradio-core-qa.so.0.0.0
lrwxrwxrwx  1 root root       28 Oct 10 13:13 libgnuradio-core-qa.so.0 
-> libgnuradio-core-qa.so.0.0.0
-rwxr-xr-x  1 root root  1607312 Oct 10 13:13 libgnuradio-core-qa.so.0.0.0
lrwxrwxrwx  1 root root       25 Oct 10 13:13 libgnuradio-core.so -> 
libgnuradio-core.so.0.0.0
lrwxrwxrwx  1 root root       25 Oct 10 13:13 libgnuradio-core.so.0 -> 
libgnuradio-core.so.0.0.0
-rwxr-xr-x  1 root root 16297556 Oct 10 13:13 libgnuradio-core.so.0.0.0
-rwxr-xr-x  1 root root      852 Oct 10 13:14 libmblock.la
-rwxr-xr-x  1 root root      922 Oct 10 13:14 libmblock-qa.la
-rwxr-xr-x  1 root root     4170 Oct 10 13:14 libmblock-qa.so
-rwxr-xr-x  1 root root   119553 Oct 10 13:14 libmblock.so
-rwxr-xr-x  1 root root      767 Oct 10 13:14 libpmt.la
-rwxr-xr-x  1 root root      825 Oct 10 13:14 libpmt-qa.la
-rwxr-xr-x  1 root root  1067008 Oct 10 13:14 libpmt-qa.so
-rwxr-xr-x  1 root root  1016420 Oct 10 13:14 libpmt.so
-rwxr-xr-x  1 root root      779 Oct 10 13:14 libradar.la
-rwxr-xr-x  1 root root   123817 Oct 10 13:14 libradar.so
-rwxr-xr-x  1 root root      802 Oct 10 13:14 libusrp.la
lrwxrwxrwx  1 root root       16 Oct 10 13:14 libusrp.so -> libusrp.so.0.0.0
lrwxrwxrwx  1 root root       16 Oct 10 13:14 libusrp.so.0 -> 
libusrp.so.0.0.0
-rwxr-xr-x  1 root root   437064 Oct 10 13:14 libusrp.so.0.0.0
drwxrwxr-x  2 root root     4096 Oct 10 13:14 pkgconfig
drwxrwxr-x  3 root root     4096 Oct 10 13:13 python2.4

During install, I ran make, make check and make install, and all of 
these seemed to pass just fine. Why would the app compile and then not 
run? Did I install the libraries incorrectly? Is there some weird path 
thing I need to do to make the executable find libusrp? Find /usr/local/lib?

Thanks for your help,

Dan