The compilation is very easy, but I'll show it here for those who feel nervous about compiling their own programmes:
mkdir ~/tmp
cd ~/tmp
The wget takes a while to figure out where to download from -- be patient:
wget http://sourceforge.net/projects/strace/files/latest/download?source=files
unxz strace-4.6.tar.xz
tar -xvf strace-4.6.tar
cd strace-4.6/
./configure
make
sudo make install
How to use:
While I've spent a couple of years with Debian I'm a CentOS newbie, and I keep being confused about the location of the libs -- for my compiles I need to put libs in /usr/lib, but to execute I seem to need to put symlinks in /usr/lib64. strace can help you track where a program is looking for its libs
e.g. to see what the program sinfo is up to
strace -o sinfo.log sinfo
Here is a snippet from sinfo.log:
open("/lib64/libc.so.6", O_RDONLY) = 3
open("/usr/local/lib/sinfo/librt.so.1", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/opt/openmpi/lib/librt.so.1", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/lib64/librt.so.1", O_RDONLY) = 3
open("/usr/local/lib/sinfo/libdl.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/opt/openmpi/lib/libdl.so.2", O_RDONLY) = -1 ENOENT (No such file or directory)
open("/lib64/libdl.so.2", O_RDONLY) = 3
You can see that it e.g. looks for libdl.so.2 first in /usr/local/lib/sinfo, then in /opt/openmpi/lib/ and finally finds it in /lib64
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