I have problem which was mentioned here multiple times, but i still cant find out how to relsove it.
I want use ceil() function in NetBeans-IDE, but still getting error Undefined reference to 'ceil'. I tried add -lm into gcc compiler by project properties but no success.
Can someone help me how to solve this specific problem?
Related
I am building C++ code using wasm(emsdk version 3.1.3) and cmake(3.15.5) and am getting the following error: -
wasm-ld: error: /Users/...somePath.../boost/boost_thread/libboost_thread.a(thread.obj): undefined symbol: __wasm_lpad_context
Anyone has any idea how to fix this?
I was able to find the answer. You need to add the flag -fwasm-exceptions to your list of compiler and linker flags.
I seem to be getting the rookie error where it says, undefined reference to 'check', as shown below:
This should not be a problem, as I have in fact made a check.h and included in hiker.c, as shown below:
Does anybody know the source of this problem? I have just started using MinGW(as I wanted to learn programming C on Windows).
Here is a picture of the main function. I can add the code too if necessary:
I guess that check function is implemented in a file check.c
You must link that file also, because of your check.h export the prototype to let the compiler know how the check function is structured, but the linker needs the check function code compiled and reachable.
What you need is to compile using a command like this:
gcc -Wall hiker.c check.c -o hiker.exe
Take also note that linker is giving you another error about WinMain#16
This means that you started a windows application project, I guess you must change your project to console project type.
I'm trying to compile a C program using libxml2 in Eclipse. It seems like my code doesn't have problems, but there are errors when I build my project.
The error output is in this screenshot: https://drive.google.com/file/d/0BwV-0_2diIaaQlZHM2Fwa2R0LWc/edit
Before this error, I had an “Undefined reference to” error, but it was because I forgot to link the library libxml2. Now it's the problem in the screenshot. I don't what to do.
[EDITED]
I solved my problem I just need to put -nostartfiles in the linker flags.
I solved my problem I just need to write -nostartfiles in the Linker Flags box :D
To find "Linker Flags" box go to Your Project > Properties > C/C++Build > Settings > GCC C Linker > Miscellaneous
That's it.
Thanks for help.
I don't think your solution is acceptable, I think it will lead to the same problem when your project is executed in other environment (another eclipse configuration, running it from console, etc)
That error occurs when you have defined the same function more than one time in your project, and I bet it's because you have defined the same function you already had in a library.
For example, if I have lib1.h with a function called hello() and then write the same function in your main.c (having that library linked) that problem will occur.
In fact, in your image, I can see "multiple definition of __data_start"
So I think you just have to change the problematic function name and it will be fixed.
In addition, this problem will be caused if you include the same library more than once in your program, but it can be solved using preprocessor (if you are interested in this, google it, since it would be off-topic and make my answer too long)
I'm basically a java developer and i have a web services created using java. Now I need a client coded with C , to consume that java WS. After surfing a lot, I landed with gSOAP cos of its support of WS.
Now, I was able to generate the header file and also the corresponding stub classes. I also have created a main class that will invoke the actual proxy method., but for some reasons my code is not getting compiled at all.
Steps of what am I doing:
wsdl2h.exe -c -o calc.h calc.wsdl
soapcpp2.exe -C calc.h
gcc.exe -o CalcClient CalcClient.c soapC.c soapClient.c stdsoap2.c
The first two steps are fine, but its only the 3 step thats giving the trouble with the undefined references error. Please note that am running the above in windows platform and the gcc compiler is provided by Bloodshed Dev tool.
The error that i get when performing step 3 is (copied a few lines..),
CalcClient.C:5: undefined reference to soap_new_LIBRARY_VERSION_REQUIRED_20816'
CalcClient.C:7: undefined reference tosoap_call_ns2__add'
CalcClient.C:10: undefined reference to soap_print_fault'
CalcClient.C:11: undefined reference tosoap_end'
and
C:\TEMP/ccS0iaaa.o(.text+0x129):stdsoap2.c: undefined reference to sendto#24'
C:\TEMP/ccS0iaaa.o(.text+0x154):stdsoap2.c: undefined reference tosend#16'
C:\TEMP/ccS0iaaa.o(.text+0x224):stdsoap2.c: undefined reference to sendto#24'
C:\TEMP/ccS0iaaa.o(.text+0x24f):stdsoap2.c: undefined reference tosend#16'
C:\TEMP/ccS0iaaa.o(.text+0x28b):stdsoap2.c: undefined reference to WSAGetLastError#0'
C:\TEMP/ccS0iaaa.o(.text+0x4a9b):stdsoap2.c: undefined reference toinet_addr#4
I know am definitely doing something wrong (as i'm new to C).I tried all the options which I can think of, Could you please help me out here?
I had the similar problem. It was mainly because i was not including stdsoap2.cpp or stdsoap2.c. I coppied stdsoap2.cpp file into the project folder from gsoap folder, then i ran the program and it worked fine.
When I try to compile a little lua program, I get these errors :
/usr/lib//liblua52.so: undefined reference to `dlsym'
/usr/lib//liblua52.so: undefined reference to `dlerror'
/usr/lib//liblua52.so: undefined reference to `dlopen'
/usr/lib//liblua52.so: undefined reference to `dlclose'
Of course, I link with -ldl. I have lua5.2-dev installed on my ubuntu.
If you need any more infos ask me.
Thanks!
When I try to compile a little lua program, I get these errors
No. You get these errors when you link the program.
The fix is to add -ldl at the end of your link line.
The easy way to get this error is to have your PLAT variable set wrong in the Makefile. You need to set it in the top level Makefile and the src/Makefile.
The legal values show up about 10 lines down from the definition.
Ensure -ldl is exactly at the end of your link line as Employed Russian mentioned