I installed boost with cmd sudo apt-get install libboost-dev
. I find my boost lib files under /usr/lib
are these:
$ ls /usr/lib | grep boost
libboost_filesystem.so.1.46.1
libboost_iostreams.so.1.46.1
libboost_python-py27.so.1.46.1
libboost_python-py32.so.1.46.1
libboost_regex.a
libboost_regex-mt.a
libboost_regex-mt.so
libboost_regex.so
libboost_regex.so.1.46.1
libboost_serialization.so.1.46.1
libboost_system.so.1.46.1
libboost_thread.so.1.46.1
libboost_wserialization.so.1.46.1
Now I want to link my program with boost.
G++: g++ test.cc -lboost_regex -lboost-iostreams -g -o prog
Result: /usr/bin/ld: cannot find -lboost_iostreams
Does the lib file name libboost_iostreams.so.1.46.1
cause this problem? If so, can I rename it to libboost_iostreams.so
?
And why I have libboost_regex.so
and libboost_regex.so.1.46.1
? Are they the same or not?
I would advise against renaming the library. Creating a soft link is preferable. I am not sure how apt-get
deals with files that are deleted or renamed by a user instead of by apt-get
itself.
libboost_regex.so
is most likely a soft link to libboost_regex.so.1.46.1
It makes more sense to create symbolic links named what you want pointing to the actual files. For example, on the Mac OS X, if I run:
ls -l `which lynx` | more
then I see all of the links. Some of which look like:
c++ -> clang++
cc -> clang
jar -> /System/Library/Frameworks/JavaVM.framework/Versions/Current/Commands/jar
The link creation command is ln
. To make a symbolic link use the -s
option like so:
ln -s /path_to_source_file /path_to_symbolic_link
Example for the boost iostream library path above:
ln -s /usr/lib/libboost_iostreams.so.1.46.1 /usr/lib/libboost_iostreams.so
Be prepared to prepend sudo
in front of the ln
command. Every time I have modified the /usr/..
area, I have had to use sudo
on my MacBook Pro. I expect the same from Ubuntu. To remove a symbolic link type:
rm /path_to_symbolic_link
Keep in mind that sudo
may be necessary again.
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