FAQ: Update LD_LIBRARY_PATH and PYTHONPATH

libbcc.so is actually installed to /usr/lib64 instead of
/usr/local/lib in my computer system:

$ find /usr -name libbcc.so
/usr/lib64/libbcc.so

And also we can find out bcc-python:

$ find /usr/lib -name bcc
/usr/lib/python2.7/site-packages/bcc

It is better to use one line command to export environment
variable LD_LIBRARY_PATH and PYTHONPATH.

Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>

diff --git a/FAQ.txt b/FAQ.txt
index e21a83243f829dcc391ea3a56d680267d51bdbd2..83b66ebdd3ac5ad91a76b9ca1416fef77251b999 100644 (file)
--- a/FAQ.txt
+++ b/FAQ.txt
@@ -8,13 +8,13 @@ Q: hello_world.py fails with:
    OSError: libbcc.so: cannot open shared object file: No such file or directory
 A: make sure to 'make install' and add the directory
    where libbcc.so was installed into your LD_LIBRARY_PATH
-   export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH
+   export LD_LIBRARY_PATH=$(dirname `find /usr -name libbcc.so`):$LD_LIBRARY_PATH
 
 Q: hello_world.py fails with:
    ImportError: No module named bcc
 A: checkout "sudo make install" output to find out bpf package installation site,
    add it to the PYTHONPATH env variable before running the program.
-   sudo bash -c 'PYTHONPATH=/usr/lib/python2.7/site-packages python examples/hello_world.py'
+   export PYTHONPATH=$(dirname `find /usr/lib -name bcc`):$PYTHONPATH
 
 Q: hello_world.py still fails with:
    bpf: Operation not permitted