BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  help building, using static library          BorlandTalk.com Forum Index -> C++ Builder (Command Line Tools) View previous topic :: View next topic   Author Message Guest Posted: Tue Jan 30, 2007 1:21 am    Post subject: help building, using static library I am trying to gain some understanding in builing and using libraries. I have the following files. // ----- hello.h ----- #ifndef HELLO_H #define HELLO_H void SayHello(); #endif // ----- hello.cpp ----- #include "hello.h" #include <iostream> void SayHello() { std::cout << "Hello there!" << std::endl; } // ----- main.cpp ----- #include <iostream> #include "hello.h" int main() { std::cout << "Begin program..." << std::endl; SayHello(); std::cout << "End program..." << std::endl; return 0; } What I am trying to do as a learning exercise is build a static library containing SayHello() and then create a console app which uses that library. To keep the size of the console application down, I'm interested in targeting the cc3250.dll. Here are the commands I ran and their output: C:\MyCode\libtest>bcc32 -c hello.cpp Borland C++ 5.5.1 for Win32 Copyright (c) 1993, 2000 Borland hello.cpp: C:\MyCode\libtest>tlib /C Hello.lib -+hello.obj TLIB 4.5 Copyright (c) 1987, 1999 Inprise Corporation Warning: 'hello' not found in library C:\MyCode\libtest>bcc32 -c -WCR main.cpp Borland C++ 5.5.1 for Win32 Copyright (c) 1993, 2000 Borland main.cpp: C:\MyCode\libtest>ilink32 /Tpe/ap/Gn/x/c c0x32 main.obj, myprog.exe, , Hello.lib import32.lib cw32i.lib Turbo Incremental Link 5.00 Copyright (c) 1997, 2000 Borland As you can see, no errors are reported (the warning reported by tlib is apparently normal), but when I try to run myprog.exe, "Begin program..." is output to my screen, but then an error window pops up, saying "myprog.exe has encountered a problem and needs to close." Clearly, I'm doing something wrong. Given when the run-time error occurs, I believe my problem has to do with the fact that my library invokes std::cout from the standard libary and that I've somehow failed to link to it properly. That's just a guess -- I'm a complete novice when it comes to static and dynamic libraries. So is the general premise of my goal -- building a static library and using it within an application that targets the cc3250.dll -- flawed? If not, do I have to link something else into my library to have cout available within it? Any help would be appreciated. Thanks. Back to top Alan Bellingham Guest Posted: Tue Jan 30, 2007 2:32 am    Post subject: Re: help building, using static library mark_ngp (AT) yahoo (DOT) com wrote: Quote: As you can see, no errors are reported (the warning reported by tlib is apparently normal), but when I try to run myprog.exe, "Begin program..." is output to my screen, but then an error window pops up, saying "myprog.exe has encountered a problem and needs to close." This could be down to something as basic as not using exactly the same compilation options on the application and the library. For instance, different packing options might do nasty things. What does -WCR do (this machine doesn't currently have bcc installed)? Are you sure you can link code with and without it defined? (It appears to make the app use the DLL runtime. If part of your code uses the DLL runtime, and part the static runtime, you'll have interesting punchups.) Alan Bellingham -- Team Thai Kingdom <url:http://www.borland.com/newsgroups/> Borland newsgroup descriptions <url:http://www.borland.com/newsgroups/netiquette.html> netiquette Back to top Ed Mulroy Guest Posted: Tue Jan 30, 2007 4:00 am    Post subject: Re: help building, using static library FYI: Quote: ...What does -WCR do ... -WCR is equivalent to saying -WR -WC, dynamic linked, console mode. Quote: ...If part of your code uses the DLL runtime, and part the static runtime... He used cw32i.lib, the dynamic version of the runtime library. .. Ed Quote: Alan Bellingham wrote in message news:j2msr2554ht7t17274qm4o1ibe8lk9natc (AT) 4ax (DOT) com... This could be down to something as basic as not using exactly the same compilation options on the application and the library. For instance, different packing options might do nasty things. What does -WCR do (this machine doesn't currently have bcc installed)? Are you sure you can link code with and without it defined? (It appears to make the app use the DLL runtime. If part of your code uses the DLL runtime, and part the static runtime, you'll have interesting punchups.) Back to top Guest Posted: Tue Jan 30, 2007 4:10 am    Post subject: Re: help building, using static library On Jan 29, 3:32 pm, Alan Bellingham <a...@episys.com> wrote: Quote: What does -WCR do (this machine doesn't currently have bcc installed)? Are you sure you can link code with and without it defined? (It appears to make the app use the DLL runtime. If part of your code uses the DLL runtime, and part the static runtime, you'll have interesting punchups.) This is precisely what I'm trying to grasp. I'm wondering if it's possible to create a static library that uses functionality from the standard library, but in such a that my library does not itself contain the standard library. Or in other words, if my intent when building my final executable is to target the cc3250.dll (which as I understand it contains what's needed at runtime for cout, cin, etc.), then how can I compile and link a static library that relies on that functionality being available via cc3250.dll? Or does the use of standard-library functions and objects in my library then force me to make my library a DLL? As I mentioned, I'm a beginner when it comes to creating and using libraries, so perhaps my understanding is flawed. I'm trying to really understand libraries, which is why I'm attempting to explicitly invoke the compiler and the linker as shown in my original post. I want to see and understand the "ugly details", if you will, rather than have those details hidden away from me by implicit calling of the linker. Thanks. Back to top Ed Mulroy Guest Posted: Tue Jan 30, 2007 4:12 am    Post subject: Re: help building, using static library You forgot the -WCR on the line where you compiled hello.cpp C:\MyCode\libtest>bcc32 -c -WCR hello.cpp instead of C:\MyCode\libtest>bcc32 -c hello.cpp Here is a screen capture: ----------------------------------------------------------------------------- C:\Documents and Settings\Edward\My Documents\lookat\q203 Quote: build C:\Documents and Settings\Edward\My Documents\lookat\q203 Quote: bcc32 -v -c -WCR hello.cpp Borland C++ 5.6.4 for Win32 Copyright (c) 1993, 2002 Borland hello.cpp: C:\Documents and Settings\Edward\My Documents\lookat\q203 Quote: tlib /C Hello.lib -+hello.obj TLIB 4.5 Copyright (c) 1987, 1999 Inprise Corporation C:\Documents and Settings\Edward\My Documents\lookat\q203 Quote: bcc32 -v -c -WCR main.cpp Borland C++ 5.6.4 for Win32 Copyright (c) 1993, 2002 Borland main.cpp: C:\Documents and Settings\Edward\My Documents\lookat\q203 Quote: ilink32 /Tpe/ap/Gn/x/c/v c0x32 main.obj, myprog.exe, ,Hello.lib import32.lib cw32i.lib Turbo Incremental Link 5.66 Copyright (c) 1997-2002 Borland C:\Documents and Settings\Edward\My Documents\lookat\q203 Quote: myprog Begin program... Hello there! End program... C:\Documents and Settings\Edward\My Documents\lookat\q203 Quote: ----------------------------------------------------------------------------- .. Ed Quote: mark_ngp wrote in message news:1170098514.405938.288330 (AT) v45g2000cwv (DOT) googlegroups.com... I am trying to gain some understanding in builing and using libraries. I have the following files. // ----- hello.h ----- #ifndef HELLO_H #define HELLO_H void SayHello(); #endif // ----- hello.cpp ----- #include "hello.h" #include <iostream void SayHello() { std::cout << "Hello there!" << std::endl; } // ----- main.cpp ----- #include <iostream #include "hello.h" int main() { std::cout << "Begin program..." << std::endl; SayHello(); std::cout << "End program..." << std::endl; return 0; } What I am trying to do as a learning exercise is build a static library containing SayHello() and then create a console app which uses that library. To keep the size of the console application down, I'm interested in targeting the cc3250.dll. Here are the commands I ran and their output: C:\MyCode\libtest>bcc32 -c hello.cpp Borland C++ 5.5.1 for Win32 Copyright (c) 1993, 2000 Borland hello.cpp: C:\MyCode\libtest>tlib /C Hello.lib -+hello.obj TLIB 4.5 Copyright (c) 1987, 1999 Inprise Corporation Warning: 'hello' not found in library C:\MyCode\libtest>bcc32 -c -WCR main.cpp Borland C++ 5.5.1 for Win32 Copyright (c) 1993, 2000 Borland main.cpp: C:\MyCode\libtest>ilink32 /Tpe/ap/Gn/x/c c0x32 main.obj, myprog.exe, , Hello.lib import32.lib cw32i.lib Turbo Incremental Link 5.00 Copyright (c) 1997, 2000 Borland As you can see, no errors are reported (the warning reported by tlib is apparently normal), but when I try to run myprog.exe, "Begin program..." is output to my screen, but then an error window pops up, saying "myprog.exe has encountered a problem and needs to close." Clearly, I'm doing something wrong. Given when the run-time error occurs, I believe my problem has to do with the fact that my library invokes std::cout from the standard libary and that I've somehow failed to link to it properly. That's just a guess -- I'm a complete novice when it comes to static and dynamic libraries. So is the general premise of my goal -- building a static library and using it within an application that targets the cc3250.dll -- flawed? If not, do I have to link something else into my library to have cout available within it? Any help would be appreciated. Thanks. Back to top Guest Posted: Tue Jan 30, 2007 5:01 am    Post subject: Re: help building, using static library On Jan 29, 5:12 pm, "Ed Mulroy" <dont_email...@bitbuc.ket> wrote: Quote: You forgot the -WCR on the line where you compiled hello.cpp C:\MyCode\libtest>bcc32 -c -WCR hello.cpp instead of C:\MyCode\libtest>bcc32 -c hello.cpp Thanks, Ed. You kindly suggest I forgot the -WCR option, however I'll fully admit that my error was one born more of ignorance than forgetfulness. In any case, I rebuilt everything, this time including the -WCR option where you specified, and everything of course works like a charm. Thanks for all your help to the community in the way of your frequent contributions to this group and your helpful website. Back to top wasknijper Guest Posted: Wed Jan 31, 2007 12:40 am    Post subject: Re: help building, using static library mark_ngp (AT) yahoo (DOT) com wrote: Quote: #include <iostream Could it be that the commandline compiler only knows <iostream.h>? w. Back to top Ed Mulroy Guest Posted: Wed Jan 31, 2007 1:24 am    Post subject: Re: help building, using static library Quote: #include <iostream Could it be that the commandline compiler only knows <iostream.h>? As you can see from the screen capture below, C++ Builder 5.5 does understand it. .. Ed ---------------------------- C:\Documents and Settings\Edward\My Documents\lookat\q203 Quote: build55 C:\Documents and Settings\Edward\My Documents\lookat\q203 Quote: \borland\bcc55\bin\bcc32 -v -c -WCR hello.cpp Borland C++ 5.5.1 for Win32 Copyright (c) 1993, 2000 Borland hello.cpp: C:\Documents and Settings\Edward\My Documents\lookat\q203 Quote: \borland\bcc55\bin\tlib /C Hello.lib -+hello.obj TLIB 4.5 Copyright (c) 1987, 1999 Inprise Corporation Warning: 'hello' not found in library C:\Documents and Settings\Edward\My Documents\lookat\q203 Quote: \borland\bcc55\bin\bcc32 -v -c -WCR main.cpp Borland C++ 5.5.1 for Win32 Copyright (c) 1993, 2000 Borland main.cpp: C:\Documents and Settings\Edward\My Documents\lookat\q203 Quote: \borland\bcc55\bin\ilink32 /Tpe/ap/Gn/x/c/v c0x32 main.obj, myprog.exe, ,Hello.lib \borland\bcc55\lib\import32.lib \borland\bcc55\lib\cw32i.lib Turbo Incremental Link 5.66 Copyright (c) 1997-2002 Borland C:\Documents and Settings\Edward\My Documents\lookat\q203 Quote: myprog Begin program... Hello there! End program... C:\Documents and Settings\Edward\My Documents\lookat\q203 Quote: ---------------------------- Quote: wasknijper wrote in message news:45bf90d8$1 (AT) newsgroups (DOT) borland.com... 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