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What library to be to be used to avoid undefined reference to `pthread_atfork'


What library to be to be used to avoid undefined reference to `pthread_atfork'

By : user3851222
Date : October 17 2020, 11:12 AM
I hope this helps . pthread_atfork() is part of the POSIX spec, so it should be there in the regular pthread library.
You may have to specify options to both the compiler & linker to build with pthreads. For example, with gcc/linux:
code :


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Undefined reference error using static library to build shared library

Undefined reference error using static library to build shared library


By : Jappi Patel
Date : March 29 2020, 07:55 AM
wish of those help I am confused If I am doing something wrong while using the static library.
code :
include $(ROOT_DIR)/PAL/Sources/Android.mk
include $(ROOT_DIR)/mtwist-0.7/Android.mk
include $(ROOT_DIR)/boost/libs/thread/src/Android.mk
include $(ROOT_DIR)/boost/libs/thread/src/Android.mk
include $(ROOT_DIR)/mtwist-0.7/Android.mk
include $(ROOT_DIR)/PAL/Sources/Android.mk
LOCAL_SHARED_LIBRARIES := boostthread
LOCAL_STATIC_LIBRARIES := mtwist
make recipe to link to avoid undefined reference to WinMain@16

make recipe to link to avoid undefined reference to WinMain@16


By : user2291597
Date : March 29 2020, 07:55 AM
How do I change my makefile to avoid the undefined reference to a function in the maths library?

How do I change my makefile to avoid the undefined reference to a function in the maths library?


By : Alberto Quero
Date : March 29 2020, 07:55 AM
Hope this helps I'm trying to install PintOS on my local Ubuntu 14.04 machine. When I try to run make to compile the utilities. I get the following error.
code :
gcc -lm  setitimer-helper.o   -o setitimer-helper
gcc -o setitimer-helper setitimer-helper.o  -lm
undefined reference to function in shared library created directly from static library

undefined reference to function in shared library created directly from static library


By : Dan T
Date : March 29 2020, 07:55 AM
To fix this issue I have figured it out. My feeling was correct -- it is a stupid mistake:
The declaration of the sim() function in main.c needs to be put into a extern "C" block, since I am using g++ as the compiler.
code :
extern "C" {
  extern uint64_t sim(uint64_t *a1, uint64_t *a2, uint64_t *a3, uint64_t len);
}
int main(int argc, char **argv)
{
  ... // preparing a1, a2, a3, len
  uint64_t act_sum = sim(a1, a2, a3, len);
  ...
}
extern "C" uint64_t sim(uint64_t *a1, uint64_t *a2, uint64_t *a3, uint64_t len);
In function `uv__signal_global_init': ... undefined reference to `pthread_atfork'

In function `uv__signal_global_init': ... undefined reference to `pthread_atfork'


By : Luke
Date : March 29 2020, 07:55 AM
To fix the issue you can do After scouring the internet, I found the solution in an obscure post from Ben Noordhuis in a Google group post.
#tl;dr
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