C Error Undefined Reference To Pthread_create
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the following demo off the web from https://computing.llnl.gov/tutorials/pthreads/ #include here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow undefined reference to `pthread_create' cmake the company Business Learn more about hiring developers or posting ads with us Stack undefined reference to pthread_create code blocks Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of undefined reference to pthread_create' makefile 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Undefined reference to 'pthread_create' — linker command option order (libraries before/after object files?) [duplicate] up vote 10 http://stackoverflow.com/questions/1662909/undefined-reference-to-pthread-create-in-linux down vote favorite 6 This question already has an answer here: undefined reference to pthread_create in Linux 8 answers When I try to compile that, I receive a particular error. But, it's not possible because I use the right flag. In server.c there is the library pthread.h. So, how can I resolve my linking problem? I'm using Linux (Ubuntu). make gcc -c -Wall -Wunused -ansi -pedantic -ggdb -o Server1.o Server.c gcc -c http://stackoverflow.com/questions/9253200/undefined-reference-to-pthread-create-linker-command-option-order-libraries -Wall -Wunused -ansi -pedantic -ggdb Util.c gcc -o Server1.exe -Wall -Wunused -ansi -pedantic -ggdb -lpthread -lm Server1.o Util.o Server1.o: In function `main': /home/ruggero/ruggero_fine/Server.c:1002: undefined reference to `pthread_create' collect2: ld returned 1 exit status make: *** [Server1.exe] Errore 1 c ubuntu linker pthreads share|improve this question edited Mar 9 at 17:34 Jonathan Leffler 438k61508821 asked Feb 12 '12 at 22:09 rschirin 47331231 marked as duplicate by alkc Users with the c badge can single-handedly close c questions as duplicates and reopen them as needed. May 2 '15 at 17:10 This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question. 3 Did you try -pthread (without 'l')? See stackoverflow.com/questions/1662909/… –Zeta Feb 12 '12 at 22:13 1 The header is pthread.h; that is not the library, though. The library would have a name such as libpthread.so (at link time; and a name such as libpthread.so.1 at runtime). –Jonathan Leffler Feb 12 '12 at 22:20 add a comment| 2 Answers 2 active oldest votes up vote 29 down vote accepted List libraries after the object files When linking only object files and libraries, list the libraries after the object files: gcc -o Server1.exe -Wall -Wunused -ansi -pedantic -ggdb Server1.o Util.o -lpthrea DOS Aptitude Questions C Aptitude Questions C++ Aptitude Questions Java Aptitude Questions DBMS Aptitude Questions Interview Questions C Interview http://www.includehelp.com/c-programming-questions/error-undefined-reference-to-pthread-create-in-linux.aspx Questions Java Interview Questions SEO Interview Questions Solved Programs C Solved Programs C++ Solved Programs Data Structure Programs Java Solved Programs Other Links Number SystemsConversion Online https://github.com/mmp/pbrt-v3/issues/24 ASCII Table Number Systems& Conversions Home C Popular & Interesting Questions Error - undefined reference to 'pthread_create' in Linux. Fixing undefined reference to 'pthread_create' in undefined reference Linux This is a common error while compiling C program in GCC/G++ Linux. This error occurs when you are using pthread_create function to create threads in your programs. To fix this problem ensure following points: Include header file pthread.h in your program. Add –lpthread linker flag with compilation command. 1- Include Header undefined reference to file #include Support Search GitHub This repository Watch 128 Star 625 Fork 172 mmp/pbrt-v3 Code Issues 18 Pull requests 1 Projects 0 Pulse Graphs New issue undefined reference to 'pthread_create', won't build #24 Closed thorn0906 opened this Issue Aug 5, 2015 · 7 comments Projects None yet Labels None yet Milestone No milestone Assignees No one assigned 3 participants thorn0906 commented Aug 5, 2015 I'm building pbrt-v3 under Arch Linux x86_64, gcc 5.2.0, and it won't build. It says in the function ParallelFor() in parallel.cpp.o in libpbrt.a there's an undefined reference to 'pthread_create'. I tried editing CXXFLAGS in CMakeFiles/pbrt.dir/flags.make and adding -pthread, then I tried -lpthread, same problem. It might be I'm just doing something wrong, but then, it should work without me messing with the makefiles anyway, shouldn't it? Thanks in advance! (By the way, I'll copy the whole error log here if it might help: Linking CXX executable exrdiff libpbrt.a(parallel.cpp.o): In function `ParallelFor(std::function