Given the code below:
<<snip>>
jlfdiaz@narcea:/tmp$ cat foo1.c
int foo1() {}
jlfdiaz@narcea:/tmp$ gcc -c -o foo1.o foo1.c
[code]....
Is possible to know with "nm", "ldd", "ar" or other unix similar command that executable "a.out" is statically linked with "libfoo1.a".
Libraries have always been ambiguous to me. I would love to have a clear understanding of them. Here's what I know so far... Ok I know that libraries are a bunch of functions and definitions in C that binaries use. I also understand that static libraries are used by the binaries in /sbin:/usr/sbin:/usr/local/sbin and dynamically linked libraries are used by the binaries in /bin:/usr/bin:/usr/local/bin So why have statically linked and dynamically linked libraries? I know that dynamically linked libraries are used to save space. Otherwise each binary would need its own private copy of a library. So dynamically libraries are used to save space.
1. Where are the static libraries and the dynamically linked libraries located in the file structure?
2. Where does ldconfig fit into all of this?
3. Would a rootkit affect both statically and dynamically linked libraries? I would think yes unless the libraries only have read permissions.
4. If the above is true, is there any reason for your libraries to have write permission other than when you want to edit them?
I'm interested in modding an open-source turn based game called Advanced Strategic Command or ASC, but to do that I need bunch of libraries. Installing those libraries is very easy in linux, I know but the thing is I'm working with windows in which the building of the libraries is a bit more complex, as you probably know. One of those libraries is the ligsigc++, I'm using VC++ but haven't been successful in building the libsigc++ in VC++. I considered making my life easier with Cygwin (a unix shell for windows) and simply executing ./Configure, Make. I's worked like a charm and the library dll it produced is named cygsigc-2.0-0.dll which made me wonder is compiling a library in cygwin to be linked with VC++ perfectly ok? That is is there any difference in compiling in cygwin and VC++?
View 2 Replies View RelatedTo create a static library, or to add additional objectiles to an existing static library, I can use a command like this:ar rcs my_library.a file1.o file2.oBut how to add an existing static library to my own static library. I have created my own static library using the command above and want to link against the library libuuid.a (placed in /usr/lib/).
View 6 Replies View RelatedI'm reading about shared, static, and dynamic libraries. What is SDL? Is it static, shared, or dynamic?
I always thought a library would be a lot of .h and .cpp files compiled separately into .o files and then if you compiled your own program you could use the -l parameter to link the library and it was all compiled together. Now I'm not so sure.
I don't even see any SDL .cpp files in my system anywhere. All I have are lots of SDL .h files in /usr/include/SDL and I don't really understand the code in them.
I'm making a wild guess here: SDL is a shared library. SDL itself is NOT compiled into my program, therefore SDL must be on any system my program tries to run on. When I compile and link SDL all it needs is the header files to know what SDL function and objects it can use. And then on every system it uses an already compiled SDL shared library thingy somewhere.
So... where is that part of SDL? All I can find are header files.
I'm thinking the advantage of shared libraries is that someone could say update SDL on their own system and take advantage of the new features without having to download new executables with the new version of SDL compiled into them for every program that uses SDL.
So if I'm making an editor and a game engine and they both use a lot of the same .cpp and .h files that I wrote and I'm tired of updating one and then the other and I need to turn them into a library, then a shared library might be kind of a silly solution. I could just make a static library. Right? Because it's not SDL. Nobody else is ever going to use this library.
I've got a shared (Windows/multiuser Linux) laptop, and I've got installed World of Warcraft and some steam games in Windows. With steam games, there is (almost) no problems. I've installed steam in Linux, and soft linked the 'steamapps' directory (per-game compatibility is another issue). With WoW, the problem is different. I would like to have almost (but not) all files. Under World of Warcraft, every file and directory must be linked except the Interface directory and WTF/config.wtf file (so every user can play with their own settings and addons). How can I have a mix of linked and not linked files without linking every file? If I link manually every file/dir, when updating from Linux other users and Windows Wow is not updated; when updating from Windows, new files remains "unlinked".
View 3 Replies View RelatedThis is the error I receive when I try to install a library. I really do not know If I could do something to skip this error message.
As you might see below. I receive the following error message
Error in dyn.load(file, DLLpath = DLLpath, ...) :
unable to load shared library '/home/apa/R/x86_64-unknown-linux-gnu-library/2.11/RandomFields/libs/RandomFields.so':
/usr/lib64/R/lib/libRlapack.so: undefined symbol: _gfortran_concat_string
[Code].....
How can we convert a dynamic library (filename.so) to a static library (filename.a) using gnu gcc . Can we get a static library form a dynamic library . I saw a few post in which the conversion form a static library to a dynamic library is mentioned but, unfortunately, not the other way.
View 4 Replies View RelatedThis is the error I receive when I try to install a library. I really do not know If I could do something to skip this error message.As you might see below. I receive the following error message Error in dyn.load(file, DLLpath = DLLpath, ...):unable to load shared library '/home/apa/R/x86_64-unknown-linux-gnu-library2.11/RandomFields/libs/RandomFields.so': /usr/lib64/R/lib/libRlapack.so: undefined symbol: _gfortran_concat_string
This is the full error log
Bash | [CODE]* installing *source* - Anonymous - d4DH09Wx - Pastebin.com
My code needs to link to some libraries. In my project file, I specify linker to link to abc library, for example. By default, does gcc link to libabc.a or libabc.so ? What if I really need to specify static or shared, how do I do that?
View 4 Replies View RelatedThe following is my Makefile, I wanted to add a staic library named libtimer.a. I'm using the following Makefile. Please let me know how to add this static library:
Makefile:-
Quote:
all:gcc -Wall -lrt -lm -pthread usbserialapp.c usbserialinit.c environ.c -o usbserial
It produces "usbserial" executable.
I have been working on this for a long time.
I could get the static libcurl library ( a "libcurl.lib" file and a "curl.h" file), which supposed to be working under Windows.
Yet I tried Visual c++ 6.0 but it wasn't working at all.
Some idea on that ? I don't mind to try MinGW and Dev C++ if it will really work. (Cygwin is not good since it require client to have cygwin.dll in run-time folder).
Can someone tell me what the number '2' refers to in function calls, for example fork(2).
View 3 Replies View RelatedApache doesn't start with libedit.so.0.0.34 ( from libedit0-3.0.snap20090923-4.1.x86_64 ).
Code:
[Tue Dec 15 16:20:51 2009] [warn] Init: Session Cache is not configured [hint: SSLSessionCache]
PHP Warning: Directive 'register_long_arrays' is deprecated in PHP 5.3 and greater in Unknown on line 0
/usr/sbin/httpd2-prefork: symbol lookup error: /usr/lib64/libedit.so.0: undefined symbol: tgetent
Solution: I copied /usr/lib64/libedit.so.0.0.27 from a previous install and symlinked /usr/lib64/libedit.so.0 to it.
ive made a slight mistake on my Ubuntu 9.10 64bit. I was trying to get Voodoo Motion Tracking software to work, and it was having trouble locating some Qt Libs, so I decided it was a good idea to move its included libs into /user/lib32 directory. Voodoo now works, but Skype instead comes up with:
Code:
skype: symbol lookup error: /usr/lib32/libQtDBus.so.4: undefined symbol: _ZN14QObjectPrivate15checkWindowRoleEv Skype was installed using their own provided 64bit .deb - it was previously working fine.
The most recent update impacted my thunderbird-3.0. When launched I get these error messages
/usr/lib/thunderbird-3.0.3pre/thunderbird-bin: Symbol `SSL_ImplementedCiphers' has different size in shared object, consider re-linking
/usr/lib/thunderbird-3.0.3pre/thunderbird-bin: symbol lookup error: /usr/lib/libnssutil3.so.1d: undefined symbol: PL_ClearArenaPool
I can only assume the libnssutil3 library was upgraded and this broke the library call in the thunderbird-3.0.
I performed a yum update and now my yum is not working and I am unable to start my apache processes (in a dmz configuration).This is the error I am getting from yum.
yum clean
Traceback (most recent call last):
File "/usr/bin/yum", line 4, in ?
import yum
[code]....
I'm running Ubuntu 10.10 and was looking for software to mix mp3's. I want to try mixxx (found here) I installed the most recent package by using the ppa of the project (as described here) Install seems to be ok (no error messages)But when I try to run mixxx from the menu nothing happens. Nothing. Running it from the terminal with the command
Code:
mixxx
I get this error message:
Quote:
mixxx: symbol lookup error: /usr/lib/libQtNetwork.so.4: undefined symbol: _ZN16QIODevicePrivate4peekEPcx
By issuing the 'nm' command on shared library (internally using one static library), the functions exposed by static library is also being listed, Which allows to use internal functions which is of course not intended. I have one static library having A(), B() and C() functions. Creating one shared library which has function XYS() that is using A() and B() functions from Static library. While doing 'nm' on shared library, all the static library function are being listed.
Static Lib:
#include<stdio.h>
void A(char *msg)
{
printf("
[code]....
I downloaded the iwatch tgz file [URL]... I unzipped them and so have a directory called iwatch that contains several files, but I do not know how to install it, or even if I do not need to. But the readme refers to an iwatch.pid file, that is not there, so I am not sure what to do. Has anyone installed and used iwatch that could help me get it working, as I want to monitor a directory and be alerted of changes.
View 3 Replies View RelatedI can't seem to find a way to do this, so maybe it's not actually possible, but I was wondering if there was a way to list all files that link to a file.
For example.
touch a
ln a b
ln a c
I want to find out what files link to a (not symlinks, mind you), assuming that this is more complicated (they are spread around to different directories).
I kind of understand about the filesystem storing links in one area and data in another, so I understand it probably takes more work to find a link from a file location than the other way around.
Previously after doing aptitude upgrade, my pidgin seems broken with no gui shown. So I decided to download the latest source from pidgin website and build it from source, but I think I made situation worse because it then complained that ssl lib was needed. Then I removed the libpurple (e.g. aptitude purge libpurple0 libpurple-bin libpurple-dev) and reinstalled pidgin (aptitude install pidgin). Now it shows the error
pidgin: symbol lookup error: pidgin: undefined symbol: purple_media_element_info_get_type
I searched on the internet and can not find a solution. The clues on the internet says that's because the piding I use is the older version of libpurple. But I think I've removed all with purge and reinstalled it. Maybe some legacy binary is referenced. What or where it might be? Or where there may contain related information.
I am trying to setup the wlan access for my Fedora 9 system. I installed ndiswrapper. But when I run
Code:
ndiswrapper -l
i am getting the error
Code:
/usr/bin/perl: symbol lookup error: /usr/bin/perl: undefined symbol: PL_use_safe_putenv
currently i am wanted to clean up my proj area but the problem with rm i am facing is some copy remain in disk with linked i am meaning soft link
A linked to B
B linked to C
C which is on other directory
A & B are on same folder
know when i run
rm -rf A
it removes only A & B but the C remain on the disk how i can remove C from the disk.. using the the same command..
Which command will tell me whether a directory is a symbolic link or not?
if it is a symbolic link, is there another command to show me which directories it is linked to?
How is Motion Detection software interpreted, and who is responsible for the interpretation operation? Is motion.conf linked to a specific libraries?
View 10 Replies View RelatedOK. I've successfully mirrored the Karmic Koala repositories. Now I have, and will have as time goes on, various computers I'll want to install Ubuntu on and point at the repository mirrors (Karmic now, Lucid later). Can I create a modified Live CD that will set up out computers from the beginning with /etc/apt/sources.list pointing at our mirrors, so we don't have to edit it later or tell people to edit it later? I've looked around and not found instructions on how to do it so far.
View 1 Replies View RelatedI changed my internet source from wireless to wired cable which came with a new IP address. Subsequently anytime I try checking for updates from the update manager it still refers me to my old IP address for wireless and here is the results I get:
[Code].....
./configure script fails to configure libsf. Please check the following last few lines of configure script error.
But find command shows the following;
It seems the file libdb does exist. man dbopen displays man page for dbopen. I also tried to ln -s /usr/lib/libdb.a and libdb.so /lib dir but all were in vain.
I have a list of email address's that I need to sift through to identify only the domain name.
xyz@yo.com
abs@yo.com
clahclah@test.com
I want to remove everything before the @ symbol and only print the domain name. Can anyone assist with this?