@R-griset said in Undefined refence to "main": As you told me in one of your first post I need to set "TEMPLATE = lib" instead of "TEMPLATE = app" in my src.pro file. To fix, edit the GCC Path variables your 'localrc' file found in your PGI install's bin directory to the new version. When I run the second command "cmake .. && make", it showed an error, which says "(.text+0x20): undefined reference to `main'". together. * [PATCH AUTOSEL for 4.14 002/161] x86/tsc: Allow TSC calibration without PIT 2018-04-09 0:19 [PATCH AUTOSEL for 4.14 001/161] firewire-ohci: work around oversized DMA reads on JM Doing all of this by hand (via commandline) is nuts. (.text+0x20): undefined reference to `main' - If you used main () function and still the error is there, you must check the spelling of the main () function. So whenever you create any class then do not forgot to add main function in your project and then you can call class functions from main. MarkoSimonovic 17 juillet 2019 19:25:40. [Solved]-(.text+0x20): undefined reference to `main' and undefined Undefined reference to class::function - C++ Forum - cplusplus.com povilas-barrier-bot mentioned this issue on Nov 9, 2021 Linux Build Failure (.text+0x20): undefined reference to `main' input-leap/input-leap#1047 Open Sign up for free to join this conversation on GitHub . I'm not sure if this is a side effect of the GCC paths being incorrect or a different problem altogether. $ (COMPILER) -pthread $ (CCFLAGS) -o $@ producer.o consumer.o AddRemove.o. It says to create a file named producer.o (with -o producer.o), but you want to create a file named main.Please excuse the shouting, but ALWAYS USE $@ TO REFERENCE THE TARGET:. This rule. [Solved] g++ link problems: In function `_start': | 9to5Answer If you have any further doubts please do let me know and i would be happy to help you. In general, if you find yourself repeating a string or name, you're doing it wrong and should use . LinuxQuestions.org - Undefined reference to 'main' error in crt1.o - .. The object for_main.o is part of the compiler runtime, and contains a reference to MAIN__ which, if you do not supply the object file resulting from compiling a Fortran main program, remains unsatisfied. (.text+0x20)'main'_GeYi1998-CSDN_(.text+0x20):'main' There's some other minor issues with the Makefile; for example, -Wall is a compiler option, and thus is not applicable when linking. Importance. Undefined reference to `loop' and 'setup' - PlatformIO Community linux vscode ,helloword Main . [PATCH 4.4 000/168] 4.4.179-stable review - lkml.kernel.org main is the start point for any C based application, and it can't run without it. compile object code in linux error (.text+0x20): undefined reference to With g++, you can do that in one step, for example: g++ list.cpp main.cpp -o main You have to have a main function somewhere. main: producer.o consumer.o AddRemove.o $(COMPILER) -pthread $(CCFLAGS) -o $@ producer.o . undefined reference to 'main' c++ #include <iostream> If you first learned java, this is an understandable manner of confusion since in Java, your code usually looks like the following: //any import statements you have public class Foo { int main () {} } LinuxQuestions.org - [SOLVED] dockapp.c:(.text+0x679): undefined Linux Build Failure (.text+0x20): undefined reference to `main' main: producer.o consumer.o AddRemove.o. Though, the actual error seems to imply that the Fortran main object (pgfmain.o) isn't getting linked in. Already have an account? - polarysekt (.text+0x18): undefined reference to `main' I found one unorthodox solution by copy pasting the entire contents of main.cpp into the conversionform.ui.h file of the application, given below after pasting it:- The text was updated successfully, but these errors were encountered: All reactions Sign up . Since you have zero object files specified this way, the . Comments sorted by Best Top New Controversial Q&A Add a Comment . 1. The errors you were getting about undefined references is normal, as Test is for unit testing, and uses/looks for code in the test directory, not the src directory - resulting in those functions not being used - but being declared as existing. Partage. Do yourself a favor and get an IDE. lkml.kernel.org If you want to build a library, use the former one, if you want to build a program, use "app". Affects. You should have used $^. c - (.text+0x20): undefined reference to `main' and undefined reference to function - Stack Overflow I am having issue getting my makefile to work without errors. (.text+0x20): undefined reference to `main' collect2: error: ld returned 1 exit status what may be causing that? You'll also have to link the resulting object file with main's object file. How to fix error in function `_start': (.text+0x20): undefined AXI Basics 1 - Introduction to AXI; Export IP Invalid Argument / Revision Number Overflow Issue (Y2K22) 65444 - Xilinx PCI Express DMA Drivers and Software Guide Learn how to structure a C file and write a C main function that handles command line arguments like a champ. (.text+0x20)||undefined reference to `main'| - Forum Pasja Informatyki [PATCH 5.19 0000/1157] 5.19.2-rc1 review - lkml.kernel.org undefined reference to `main' Issue #128 dotnet/LLVMSharp . Getting undefined reference to main error?? - LinuxQuestions.org In function `_start': (.text+0x20): undefined reference to `main' collect2: error: ld returned 1 exit status. Ask questions and share information with other developers who use Intel Math Kernel Library. ./waf gives undefined reference to main error - Google Groups , main . How to fix 'undefined reference to `main' collect2: error: ld returned -L$ (NETCDF)/lib -lnetcdff -lnetcdf -qopenmp. linux-next: Tree for Oct 15 - Linux kernel r/cs50 - (.text+0x20): undefined reference to `main' when trying to LKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH 4.4 000/168] 4.4.179-stable review @ 2019-04-24 17:07 Greg Kroah-Hartman [PATCH 4.4 000/168] 4.4.179-stable review @ 2019-04-24 17:07 Greg Kroah-Hartman Thank you. (.text+0x20): undefined reference to `main' and undefined reference to compile error: /usr/lib/crt1.o: In function `_start': (.text Undefined references when compiling MCIP - MCIP - CMAS CENTER FORUM void main() main void . What I can't manage to track down is the cause of this linker error: <artificial>: (.text.startup+0x100): undefined reference to `lcd_init (unsigned char)'. int main() {call_func1(); return 0;} icpc func1.o -shared -o libshare.so icpc main1.c ./libshare.so //OK icpc main1.c //main1.c:(.text+0x29): undefined reference to `call_func1()' This is the way we generally create and use shared libraries. 1 solution Solution 1 This is a linker error, and it's telling you that the main function that it needs in order to run your code isn't there. file auto . Bonjour, je dbute dans la programmation en C, j'ai pour objectif de raliser un petit jeu (celui du plus ou moins . C. As Shahbaz rightly points out, the gmake professionals would also use $^ which expands to all the prerequisites in the rule. Error using MKL: lib64/crt1.o: In function `_start': (.text+0x20 undefined reference to `StitchedMap::get_stitch ()' . c++ - Makefile: (.text+0x20): undefined reference to `main' collect2 The text was updated successfully, but these errors were encountered: All reactions . When building an executable linker (ld) is looking for main() to use it as a function to call / start your program with.Most likely causes would be: You've forgotten to compile the source / link in the object where main is defined. undefined reference to `StitchedMap::get_stitch ()' Assigned to. (.text+0x20): undefined reference to `main' and undefined reference to gettimeofday error on Zedboard with EDK 14.3 - Xilinx the following makefile: is not for your specific directory layout; shows a good (but not great) way to write the makefile; shows one method for creating dependency files (however, gcc can be used directly to produce those files is written for a linux OS Erreur (.text+0x20): undefined reference to `main' LKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH 5.18 0000/1095] 5.18.18-rc1 review @ 2022-08-15 17:49 Greg Kroah-Hartman 2022-08-15 17:50 ` [PATCH 5.18 0001/1095] Makefile: link with -z noexecstack --no-warn-rwx-segments Greg Kroah-Hartman ` (998 more replies) 0 siblings, 999 replies; 1101+ messages in thread From: Greg Kroah-Hartman @ 2022-08-15 17:49 UTC (permalink . [PATCH 5.18 0000/1095] 5.18.18-rc1 review - lkml.kernel.org Bug #1680293 reported by lzyr on 2017-04-06. -o file Place output in file file. In your makefile, the main rule will expand to something like this. Normally I would expect you to have it in doMyAnalysisHeavyIon.C with your Makefile content. system closed March 8, 2022, 12:58pm #3 2. main: producer.o consumer.o AddRemove.o. VagrantVirtualboxUbuntu 18.0.4. Error: Id returned 1 exit status (undefined reference to 'main') . LIBS = -L$ (IOAPI_ROOT)/lib -lioapi. OS used ubuntu 10 . 36,582 As far as I can see you are not compiling file proj1_unittest.cpp (as your code comment has it) / proj1_unittest.c (as your console output implies). linking ERROR: for_main.c:(.text+0x2a): undefined reference to `MAIN gcc -pthread -Wall -o producer.o consumer.o AddRemove.o. g++ -Wall -o "main" "main.cpp" You will need to compile whatever cpp file has those functions. (.text+0x20): undefined reference to `main' Building from the command line works perfect, so I looked what libraries the executable is linked to: linux-vdso.so.1 => (0x00007fff331ff000) How to fix 'undefined reference to `main' collect2: error: ld returned aha_1980 Lifetime Qt Champion 27 Dec 2019, 02:09 @R.griset. (.text+0x20): undefined reference to `main' #2 - GitHub In any c++ program main () function is necessary to start a program. Generally this error occurs when we forgot not define main () function in program. 6. (.text+0x20): undefined reference to `main' #1 - GitHub c++ link error: undefined reference to `main' - Intel It is however listed as prerequisite to be compiled and linked into . Pull the .o file that was compiled from the Fortran file containing the main program out of the .a file. Given that all your source code is in Fortran, your post is a bit out of place in this thread! 08-28-2010 03:13 AM. 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