Trying to compile a c project then encountered error like below
undefined reference to `__llvm_profile_instrument_target'
undefined reference to `llvm_gcda_start_file'
undefined reference to `llvm_gcov_init'
This is due to using the wrong compiler! gcov is meants to be built with GCC. Therefore switching the compiler to GCC fixed the build
It works with llvm compiler too, just add --coverage.
https://clang.llvm.org/docs/SourceBasedCodeCoverage.html
Related
while compiling the code with compiler flag -fsanitize=bounds for clang-4.0 , i seem to be getting this linking error although there is no out of bound access that the code is doing.
Any help here when does the compiler throw this error - undefined reference to __ubsan_handle_out_of_bounds_abort.
Most likely you forgot to add -fsanitize=bounds to your linker flags.
I have some core libraries compiled in icc and I am using those libraries to build my code with the help of gcc.
I have included the -lm in linking command but I am still getting he following undefined references:
undefined reference to __libm_sse2_sin
undefined reference to __libm_sse2_sincos
undefined reference to __libm_sse2_pow
Does anyone know how to resolve this? According to my investigation this is happening due to use of different compilers but using icc instead of gcc is not an option for me.
Is there any extra library I need to add which have definition for these undefined references?
I've been transitioning to SDL 2 from 1.2 and I seem to have finally fixed all incompatibilities within my code. However, I am still getting some compile errors that appear to be about linking, but I have tried everything I know of to fix the linker directories and don't know what to do now.
Since warnings, the compile directory, the program name, and repeats of the same compiler output line don't matter in this situation, I've omitted warnings, changed the compile directory to "C:\", changed the program name to "program", and removed duplicated compiler output lines.
C:\program.program.cpp|| undefined reference to `SDL_DestroyWindow'|
C:\program.o:program.cpp|| undefined reference to `SDL_DestroyRenderer'|
C:\program.o:program.cpp|| undefined reference to `SDL_DestroyTexture'|
C:\program.o:program.cpp|| undefined reference to `SDL_CreateWindow'|
C:\program.o:program.cpp|| undefined reference to `SDL_CreateRenderer'|
C:\program.o:program.cpp|| undefined reference to `SDL_CreateTexture'|
C:\program.o:program.cpp|| undefined reference to `SDL_LockTexture'|
C:\program.o:program.cpp|| undefined reference to `SDL_UnlockTexture'|
C:\program.o:program.cpp|| undefined reference to `SDL_GetMouseFocus'|
I'd think that if it were a problem with including the library then many of the other SDL functions would freak out, but the audio functions, LoadBMP, and LoadWAV seem to be fine.
Is it possible that I am still linking the old SDL 1.2 libraries?
It turns out that I was actually linking the x64 libraries when I was supposed to be linking the i686 libraries. I'm not sure why I can't use the 64-bit ones, but apparently MinGW likes for them to be 32-bit.
I am coding in C an optimization problem on linux. I am using CPLEX to solve this optimization problem.
I wrote my code and everything, but when i'm trying to compile in the terminal, I am getting such errors:
etc.... I am trying to change in my code the CPX to CPXX but still
I have a 64-bit machine
model.c is the name of my C file.model.c:(.text+0x115c): undefined reference to "CPXnewrows"
model.c:(.text+0x121b): undefined reference to "CPXchgcoeflist"
model.c:(.text+0xd62): undefined reference to "CPXnewcols"
Please any help would be more than grateful!!!
Those are linker errors. You need to link the CPLEX library with model.c.
This link might have some applicable information on how to do this on Linux.
I'm writing a program dealing with threads that I've almost got working completely. Unfortunately, I'm hitting an error (repeated 4 times) who's syntax I'm not familiar with. Here's a quick snip-it of my compile commands, and the errors that follow:
gcc -o threads threads.cpp -pthread<br>
/tmp/ccy8maS0.o: In function `tenPercentA()':
threads.cpp:(.text+0xde): undefined reference to `ceil'
/tmp/ccy8maS0.o: In function `tenPercentB()':
threads.cpp:(.text+0x1c6): undefined reference to `ceil'
/tmp/ccy8maS0.o: In function `fiftPercentC()':
threads.cpp:(.text+0x2ae): undefined reference to `ceil'
/tmp/ccy8maS0.o: In function `fiftPercentD()':
threads.cpp:(.text+0x396): undefined reference to `ceil'
/tmp/ccy8maS0.o:(.eh_frame+0x12): undefined reference to `__gxx_personality_v0'
collect2: ld returned 1 exit status
I've already included the math.h library in my program, and I'm using the correct syntax for the call:
ceil(tempA);
Where tempA is a double holding the value I need to be rounded up.
Any suggestions? I've tried Google'ing these errors but, like most errors, it's hard to find specific examples with the same pattern as yours.
EDIT: I've solved all of the ceil related errors (using -lm on the command line) however the last error still remains, and I have no idea what it means, or how to fix it.
Referring the undefined reference to ceil():
You seem to be missing to link against libm.
Adding the option -lm to your call to gcc should solve this problem.
#includeing math.h is for the compiler to get to know ceil()'s defintion. The linker then later needs to know where ceil()'s implementation actually resides, namely in libm.