Apr 22, 2014 f1.cpp:(.text+0xc): undefined reference to `foo' and if you compile f2.cpp on its own, you get this even more frightening one: crt0c.c:(.text.startup+0x39): undefined reference to `WinMain@16. In this situation, you need to compile both the the source files on the same command line, for example, using GCC: $ g f1.cpp f2.cpp -o myprog. You are not linking against helloworld.c. An easy way to do this is to run this compilation command: cc -o main main.c helloworld.c. More complicated projects often use build scripts or make files that separate the compilation and linking commands, but the above command (combining both steps) should do fine for small projects. Aug 28, 2012 In C main is an int, so you can return 0; in main when you want to exit the program. Hope that helps. All the best, NwN. Showing links to tutorials is useless, we need to see, what you did. Were you able to build the opencv libs? (in that case it's only a problem of 'how to use them' now. (and probably noone else is using dev-cpp here, so don't expect much, if it is related to that). If I remember correctly exit is a C function - so there are better ways of doing this. I would also not exit the program from another function than main, this can be very hard to debug in larger scale programs. In C main is an int, so you can return 0; in main when you want to exit the program. Hope that helps. All the best, NwN. Aug 17, 2018 若使用的是系統裝的函式庫 X，裝上 X-dev 後會有 header，然後看有沒有帶 pkg-config 的設定檔。有的話用 pkg-config 可以得知該下什麼參數找到 header。.
hello all
working on a class project in C++ using eclipse and g++ stuck a zip of the project as an attachment but here is the basics
i get 'undefined reference to 'complex()' errors on the complex() lines
and 'undefined reference to 'file()' errors on the file() lines
then when i try to use array lists in side the objects compiler says 'undefined reference to 'Complex::complexList()' complexList being a vector in my complex object.
slimier issues inside other sub objects
any help would be much appreciated:?:
- 2 Contributors
- forum 9 Replies
- 256 Views
- 10 Hours Discussion Span
- commentLatest Postby theABCasianLatest Post
Undefined Reference To C++ Error
jonsca1,059
You don't need the () when using a default constructor nor do you need them on the object when invoking a method (you do need them on the method call itself)
The second part of your question I'm not sure of, but if you are dynamically allocating those objects then you'd need to take care of that in the constructor of the object being called.
Undefined Reference To
P: n/a | I'm rather new to C++ programing. I'm using the dev-C++ program on a
windows XP OS. I'm trying to compile the code for a multi user dungeon
(MUD) called circle-mud.
When I compile I get the following errors:
----
Compiler: Default compiler
Building Makefile: 'C:EvoMudcircle-3.1srcMakefile.win'
Executing make...
make.exe -f 'C:EvoMudcircle-3.1srcMakefile.win' all
g++.exe act.comm.o act.informative.o act.item.o act.movement.o
act.offensive.o act.other.o act.social.o act.wizard.o alias.o ban.o
boards.o bsd-snprintf.o castle.o class.o comm.o config.o constants.o
db.o fight.o graph.o handler.o house.o interpreter.o limits.o magic.o
mail.o mobact.o modify.o objsave.o olc.o random.o shop.o spec_assign.o
spec_procs.o spell_parser.o spells.o utils.o weather.o -o 'EvoMud.exe'
-L'C:/Dev-Cpp/lib'
comm.o(.text+0x4ec):comm.c: undefined reference to `closesocket@4'
comm.o(.text+0x570):comm.c: undefined reference to `WSAStartup@8'
comm.o(.text+0x5db):comm.c: undefined reference to `socket@12'
comm.o(.text+0x5ec):comm.c: undefined reference to `WSAGetLastError@0'
comm.o(.text+0x639):comm.c: undefined reference to `setsockopt@20'
comm.o(.text+0x6a2):comm.c: undefined reference to `setsockopt@20'
comm.o(.text+0x6e2):comm.c: undefined reference to `htons@4'
comm.o(.text+0x70d):comm.c: undefined reference to `bind@12'
comm.o(.text+0x72b):comm.c: undefined reference to `closesocket@4'
comm.o(.text+0x758):comm.c: undefined reference to `listen@8'
comm.o(.text+0x846):comm.c: undefined reference to `select@20'
comm.o(.text+0xb4f):comm.c: undefined reference to `select@20'
comm.o(.text+0xb7c):comm.c: undefined reference to `__WSAFDIsSet@8'
comm.o(.text+0xbd2):comm.c: undefined reference to `__WSAFDIsSet@8'
comm.o(.text+0xd28):comm.c: undefined reference to `__WSAFDIsSet@8'
comm.o(.text+0x1080):comm.c: undefined reference to `__WSAFDIsSet@8'
comm.o(.text+0x1f65):comm.c: undefined reference to `htonl@4'
comm.o(.text+0x1fa9):comm.c: undefined reference to `htonl@4'
comm.o(.text+0x1fbd):comm.c: undefined reference to `htonl@4'
comm.o(.text+0x1fe3):comm.c: undefined reference to `inet_ntoa@4'
comm.o(.text+0x200f):comm.c: undefined reference to `inet_addr@4'
comm.o(.text+0x2071):comm.c: undefined reference to `setsockopt@20'
comm.o(.text+0x20c8):comm.c: undefined reference to `accept@12'
comm.o(.text+0x2111):comm.c: undefined reference to `closesocket@4'
comm.o(.text+0x216a):comm.c: undefined reference to `closesocket@4'
comm.o(.text+0x21cf):comm.c: undefined reference to `gethostbyaddr@12'
comm.o(.text+0x21fb):comm.c: undefined reference to `inet_ntoa@4'
comm.o(.text+0x2269):comm.c: undefined reference to `closesocket@4'
comm.o(.text+0x278d):comm.c: undefined reference to `send@16'
comm.o(.text+0x27c1):comm.c: undefined reference to `WSAGetLastError@0'
comm.o(.text+0x27cd):comm.c: undefined reference to `WSAGetLastError@0'
comm.o(.text+0x289f):comm.c: undefined reference to `recv@16'
comm.o(.text+0x28d3):comm.c: undefined reference to `WSAGetLastError@0'
comm.o(.text+0x28df):comm.c: undefined reference to `WSAGetLastError@0'
comm.o(.text+0x3108):comm.c: undefined reference to `closesocket@4'
comm.o(.text+0x35a8):comm.c: undefined reference to `ioctlsocket@12'
collect2: ld returned 1 exit status
make.exe: *** [EvoMud.exe] Error 1
Execution terminated
----
comm.o is some sort of encrypted file. I had never even heard of
'.o' files before.
Thanks!
|
|