I am getting a compile error trying to compile a simple tester program from the documentation.
C:\DOCUME~1\A\LOCALS~1\Temp\ccRsXzHu.o:tester.cpp:(.text+0xa6): undefined reference to `_imp___ZN5boost6thread4joinEv'
C:\DOCUME~1\A\LOCALS~1\Temp\ccRsXzHu.o:tester.cpp:(.text+0xb4): undefined reference to `_imp___ZN5boost6threadD1Ev'
C:\DOCUME~1\A\LOCALS~1\Temp\ccRsXzHu.o:tester.cpp:(.text+0xcf): undefined reference to `_imp___ZN5boost6threadD1Ev'
C:\DOCUME~1\A\LOCALS~1\Temp\ccRsXzHu.o:tester.cpp: (.text$_ZN5boost11this_thread18interruptible_waitEy[boost::this_thread::interruptible_wait( unsigned long long)]+0x4a): undefined reference to `_imp___ZN5boost11this_thread18interruptible_waitEPvNS_6detail7timeoutE'
C:\DOCUME~1\A\LOCALS~1\Temp\ccRsXzHu.o:tester.cpp: (.text$_ZN5boost6threadC1IPFvvEEET_NS_10disable_ifINS_14is_convertibleIRS4_NS_6detail13thre ad_move_tIS4_EEEEPNS0_5dummyEE4typeE[boost::thread::thread<void (*)()>(void (*)(), boost::disable_if<boost::is_convertible<void (*&)(), boost::detail::thread_move_t<void (*)()> >, boost::thread::dummy*>::type)]+0x23): undefined reference to `_imp___ZN5boost6thread12start_threadEv'
collect2: ld returned 1 exit status
I am using mingw 4.5 and g++ 4.5.2 on windows. Boost version v1.4.8.
I hope someone can help me solve this problem.
Thanks.
It looks like you aren't linking to the boost libraries.
Boost doesn't come with windows since it isn't a standard library. You've got to download the headers and libraries, then include the headers in your project and link to the libraries at compile time. Since you're using g++, this means adding a -l line to your compile command. The -l line must be used with each specific library you want to use also, you can't just specify the boost directory.
This page will help you get started on Windows and this page will help you get started on *nix platforms.
Once you've compiled boost, then in your example, you should compile your program with
g++ -o tester.exe -Lpath/to/boost/libraries/ -lboost_thread tester.c
Make sure you've got all your libraries linked properly.
Try putting this line first if your thread library is statically defined
#define BOOST_THREAD_USE_LIB
Also, check out this thread.
Related
This is probably related to
c++ reading fits file using ccfits
which was never answered.
Anyway, I hope my question is easier to reproduce. There is an example program for CCfits at:
http://heasarc.gsfc.nasa.gov/fitsio/CCfits/html/cookbook.html
I am attempting to compile this using:
g++ cookbook.cpp -o cookbook -lCCfits -lcfitsio
The link fails for every CCfits function in the file:
/tmp/cc7hVaju.o: In function main':
cookbook.cpp:(.text+0x14): undefined reference towriteImage()'
cookbook.cpp:(.text+0x31): undefined reference to writeAscii()'
cookbook.cpp:(.text+0x4e): undefined reference towriteBinary()'
cookbook.cpp:(.text+0x6b): undefined reference to copyHDU()'
cookbook.cpp:(.text+0x88): undefined reference toreadHeader()'
cookbook.cpp:(.text+0xa5): undefined reference to readImage()'
cookbook.cpp:(.text+0xc2): undefined reference toreadTable()'
cookbook.cpp:(.text+0xdf): undefined reference to readExtendedSyntax()'
cookbook.cpp:(.text+0xfc): undefined reference toselectRows()'
collect2: error: ld returned 1 exit status
I have tried this with the CCfits package that comes with Ubuntu. I have also tried installing the package myself. Same error.
Strangely, I get similar messages if I do not include the libraries on the command line (i.e., "g++ cookbook.cpp -o cookbook"). The one difference is that I also get this error:
/tmp/ccMVMkSB.o: In function CCfits::FITS::setVerboseMode(bool)':
cookbook.cpp:(.text._ZN6CCfits4FITS14setVerboseModeEb[_ZN6CCfits4FITS14setVerboseModeEb]+0xf): undefined reference toCCfits::FITS::s_verboseMode'
This must be a clue, right? Seems to say that the libraries I have named, although they exist, do not contain all the functions I need.
Thanks for any help,
Charles
Not sure if you got a suitable answer to this question but as far as I can tell the main issue is that you are not including the definitions to the function signatures. These are usually defined in the header files of c++ libraries.
For example, if your library is installed in "/usr/local" on a UNIX system then the header files will be installed in the location "/usr/local/include/CCfits". The corresponding lib files will be installed at "/usr/local/lib". The important thing is that the compiler does not know this and you need to inform it of these locations.
g++ cookbook.cpp -o cookbook -I /usr/local/include/CCfits -L /usr/local/lib -lCCfits -lcfitsio
The "-I /usr/local/include/CCfits" flag and the given parameter inform g++ of the location of the header files that it is looking for. The "-L /usr/local/lib" flag and the given parameter inform g++ of the location of the library files. It is important to note that g++ will search in the standard location for libraries on in your environment as well this is just giving it more locations to search. There are in fact rules for what it should do if it finds multiple libraries which are the same in different locations but I don't explicitly remember those.
Also to be safe, ensure that the libraries are loaded into memory by the OS. These are shared libraries not static so they are not stored into the executable file. This won't make a difference when compiling the source but will prevent the successful execution of the executable. To ensure that the OS has loaded the library into memory run the following command:
sudo ldconfig
Yours Aye,
Omar EQ
Recently I found an example of how to use the expect library in C++. I tried to compile it, but the compiler (g++) said, that tcl8.5/expect.h doesn't exists. So I tried to include tcl8.6/expect.h - still the same error. I checked the /usr/include/ directory and I wasn't surprised when I've noticed, that there is no tcl8.x directory.
I've searched for files with "expect" in their name. Here's what I found:
/usr/include/expect_tcl.h
/usr/include/expect_comm.h
/usr/include/expect.h
Unfortunately when I tried to include any of these I got the following list of errors during compilation:
> g++ test.cpp -Wall -std=c++0x -ltcl8.6 -lglog -o test
/tmp/cce8k1BA.o: In function `task(std::string const&, std::string const&, std::string const&)':
test.cpp:(.text+0x16): undefined reference to `exp_is_debugging'
test.cpp:(.text+0x20): undefined reference to `exp_timeout'
test.cpp:(.text+0x38): undefined reference to `exp_popen'
etc...
How can I solve this problem?
[EDIT]
When I tried to link it with the expect lib (-lexpect) I got the following error:
/usr/bin/ld: cannot find -lexpect
collect2: error: ld returned 1 exit status
I'm sure that both - tcl8.6 and expect 5.45-4 are installed.
The usual way of distributing Expect these days puts the shared library in a non-standard location and loads it dynamically by full pathname. This works well and is minimal fuss for most people, but does make it rather hard to use Expect's C interface in your own code.
The easiest way is going to be to build your own copy from source, especially as that will give you control over how exactly it was built. This can particularly include keeping the majority of symbols in the library instead of stripping them on install, which will help a lot with debugging. You probably ought to use the current supported version. (Yes, it's a release from several years ago. It doesn't need a lot of support effort most of the time.)
You haven't linked to the expect library during your build. Add -lexpect to your g++ command.
Can someone please explain how to use libcurl with C++ on Windows with Eclipse CDT/Code::Blocks or a similar IDE?
I'm very new to C++ but I know my way around Java very well.
I'm using MinGW but I keep getting this error:
C:\Core\src>g++ -I"C:\curl\include\curl" -L"C:\curl\lib64" -lcurldll core.cpp -o
core.exe
C:\Users\Bob\AppData\Local\Temp\cc2BV0HI.o:core.cpp:(.text+0xc81): undefined
reference to `_imp__curl_easy_init'
C:\Users\Bob\AppData\Local\Temp\cc2BV0HI.o:core.cpp:(.text+0xca7): undefined
reference to `_imp__curl_easy_setopt'
C:\Users\Bob\AppData\Local\Temp\cc2BV0HI.o:core.cpp:(.text+0xcc4): undefined
reference to `_imp__curl_easy_setopt'
C:\Users\Bob\AppData\Local\Temp\cc2BV0HI.o:core.cpp:(.text+0xcd1): undefined
reference to `_imp__curl_easy_perform'
C:\Users\Bob\AppData\Local\Temp\cc2BV0HI.o:core.cpp:(.text+0xce1): undefined
reference to `_imp__curl_easy_cleanup
What I've Tried:
If I give the wrong library path/name it will tell me that it can not find the library. So clearly it FOUND the libcurldll.a/libcurl.a files but it isn't linking with them properly.
I've tried putting the actual libcurl.dll file from the bin into every source folder possible in my project.
I've tried going to C/C++ General > Paths and Symbols then added "curl" and "curldll" to libraries and "C:\curl\lib64" to the library search path.
I've tried manually adding the -lcurl, -lcurldll, -DCURL_STATICLIB, -L"C:\curl\lib64" options to the MinGW Linker tool.
This has been stumping me for days. Please help.
I have a problem when using <boost/thread.hpp> in my code. When I try to compile it in Qt, I get these errors:
undefined reference to boost::system::generic_category()
undefined reference to boost::system::generic_category()
undefined reference to boost::system::system_category()
error: ld returned 1 exit status
Anyway, I searched StackOverflow and found this:
Undifined Reference With Boost When I Try To Compile
They say the key to solve this problem is adding -lboost_system. But where should I add this?? :( I'm a newbie in boost and Qt and I want don't wanna compile my programs using command-line directly. Is there a way to add these command-line options to Qt Creator?
I use Qt 5 with MinGW compiler and Boost 1.53. Thanks.
Add it to your .pro file:
LIBS += -L<their location> -lboost_system
I'm assuming that you have the boost_system library installed in a place the compiler will look of course.
I'm trying to set up libusb API on my OS. I downloaded libusb api on libusb.org. I followed the standard installation procedure:
cd into directory
./configure
make
make check //without errors
make install
Then I launched Eclipse C/C++ and copied some code from the tutorial found on the internet. But when trying to build it I got following output:
main.cpp:(.text+0x19): undefined reference to `libusb_init'
main.cpp:(.text+0x76): undefined reference to `libusb_set_debug'
main.cpp:(.text+0x8a): undefined reference to `libusb_get_device_list'
main.cpp:(.text+0x136): undefined reference to `libusb_free_device_list'
main.cpp:(.text+0x142): undefined reference to `libusb_exit'
/tmp/ccOWJGwe.o: In function `printdev(libusb_device*)':
main.cpp:(.text+0x162): undefined reference to `libusb_get_device_descriptor'
main.cpp:(.text+0x28a): undefined reference to `libusb_get_config_descriptor'
main.cpp:(.text+0x4d4): undefined reference to `libusb_free_config_descriptor'
collect2: ld returned 1 exit status
I have libusb.so in /lib and also I have usb.h in /usr/local/include and the link for the .so and libusb.a in /usr/local/lib.
Also the #include inside the code is correct.
I know that problem is in linker but I, kind of, cannot make it work :)
I'm using Fedora 15 operating system and gcc 4.6.0 20110603 (Red Hat 4.6.0-10) version compiler.
So what could I do to resolve these undefined references? Thanks very much for help :)
I did face the same problem. But I was able to solve it by adding '-lusb-1.0' to the linker.
e.g : g++ myfile.cpp -lusb-1.0
you have to set the library linker flag for compilation in the linker,
you can get a full list in the console by executing
pkg-config --list-all
These are the libraries which you have installed on your system and you have to link against the ones you want to use.
so in your example it is libusb so you do
pkg-config --libs libusb
there should be the output
-lusb
or
-lusb-1.0
This gives you the flag you have to pass to the linker. e.g.
g++ myfile.cpp -lusb[-1.0]
Then you edit the configuration of the project and search for the linkerflags, there should be a textfield for that somewhere in the buildoptions. i'm not quite shure where to find it but googling for it suggested:
Project -> Properties -> C/C++
Build -> Miscellaneous -> flags
After you found it, just add the linker flag in the textfield and you should be fine.
EDIT
since my answer is the accepted one, I also added the other flag that seems to work for a lot of people.
What is your linker command line? You need to have -lusb in the linking command; just having the header included won't work.
I don't use Eclipse C/C++ but I am pretty sure the reason is the same that I faced some while ago when setting up a C project in Netbeans.
It's not enough to have the #include in your code and the library at the right location - you also have to tell Eclipse where to look for them and how to use them. This turorial shows you how to set it up in Eclipse.