Mail Archives: djgpp/2000/03/27/15:19:20
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Damian Yerrick schrieb in Nachricht ...
> _____________ _____________ _____________ _____________ _____________
>Read Me Third: The Short DJGPP FAQ List
>Most Frequently Asked Questions in comp.os.msdos.djgpp
>By Damian Yerrick
>(updated 14 February 2000)
>
>Because many people do not have time to browse through the whole 200-
>page DJGPP FAQ list, I created this extremely condensed version based
>on the most common DJGPP questions on c.o.m.d and c.o.m.p.
>Read the original at http://www.delorie.com/djgpp/v2faq/
>Read the latest short FAQ at
> http://www.rose-hulman.edu/~yerricde/minifaq.txt
>
>To be included in this list, a question must be related to DJGPP and
>discussed in at least five separate threads in comp.os.msdos.djgpp
>and/or comp.os.msdos.programmer. If a question is also answered in the
>full FAQ, these five questions must have come within five weeks.
>
>
> 1. Why DJGPP?
> 2. Location of Info-ZIP
> 3. I know C++. How do I enter my code into DJGPP?
> 4. C++: linker "undefined reference" to everything
> 5. C++: linker "cannot open -lstdcx"
> 6. Long file names
> 7. How do I do (graphics)? How do I do (sound)? What is "spilled"?
> 8. What is DPMI?
> 9. Program crashes in _free
>10. Help!
>11. Locations of various commonly requested files
>
>
>Q: I'm looking for a DOS compiler. Why DJGPP?
>
>A: Watcom C++ was a payware C/C++ compiler that made 32-bit DOS
>binaries. You can recognize a program built with Watcom because it
>will generally come with the DOS extender DOS4GW.EXE. According to
>Sascha Bendinger <digana AT t-online DOT de>, it has been shelved and is
>no longer developed.
>
>DJGPP, on the other hand, is a free C/C++ compiler that makes 32-bit
>DOS binaries. DJGPP programs often come with a DPMI host called
>CWSDPMI, but a compatible extender is built into enhanced mode
>Windows 3.1 and later. Because DJGPP is a port of the popular GNU C++
>Compiler, programs developed with DJGPP will be more portable (Davin
>McCall <DavMac AT iname DOT com>). And its C library fully supports long
>filenames where the host DOS provides them, i.e. under Windows 95, 98,
>and 2000 (note: not NT <= 4).
>
>
>Q: WinZip wants to put each zipfile's contents into a new folder. How
>do I unzip everything into C:\DJGPP?
>Q: WinZip wants to make long filenames on my Windows NT. How do I
>turn them off?
>
>A: Get unzip32 from the DJGPP Zip Picker, at
> http://www.delorie.com/djgpp/
>Then install everything as directed in the README.
>
>
>Q: How do I enter my code into DJGPP?
>
>A: You can use any text editor and then use gcc from the command line:
> C:\>gcc hello.c -o hello.exe
>Or you can use RHIDE, Robert Hoehne's Integrated Development
>Environment, which works almost exactly like Borland Turbo C++ for
>DOS. If you downloaded it from Pavenis's web site
> http://www.lanet.lv/~pavenis/rhide.html
>and you installed DJGPP to c:\djgpp, RHIDE should be at
> c:\djgpp\bin\rhide.exe
>Many people use a text editor (Emacs and vi are popular) to edit
>their code and GNU Make, a scripting language for file translation
>dependencies, to manage compilation.
> C:\>info make
>
>
>Q: I can compile and link C code just fine, but when I try to
>compile and link a C++ program from the command line, I get
>"undefined reference" errors all over the place.
>
>A: Use gpp instead of gcc. gpp knows about the
>extra libraries that C++ programs need.
>
>
>Q: When I try to compile and link a C++ program in RHIDE, I get
> Error: C:/djgpp/bin/ld.exe: cannot open -lstdcx: No such file or
> directory (ENOENT)
>
>A: RHIDE 1.4 has a slight bug with long filenames in C++. See section
>8.8 of the full FAQ list for a full explanation. A fix for this
>problem has been integrated into DJGPP 2.03; get it at the
>zip picker.
>
>
>Q: Why can't the C++ compiler find streambuf.h or -lstdcxx?
>Q: Why can't I use long file names under NT or plain DOS?
>
>A: MS-DOS by itself does not support long file names such as
>s t r e a m b u f . h
>and neither does Windows NT 4's DOS emulator. You probably used WinZip
>under Windows to unzip DJGPP (giving stream~1.h according to plain
>DOS). Try reinstalling DJGPP using unzip32, as described above. See
>also sections 8.3 and 22.18 of the full FAQ list.
>
>
>Q: How do I do (graphics)?
>Q: How do I do (sound)?
>Q: How do I do (mouse)?
>
>A: The Allegro library by Shawn Hargreaves et al. handles the
>keyboard, mouse, joystick, graphics, waves, and MIDI. Version 3.931
>works on MinGW, Linux, DJGPP, Watcom C++, and even dreaded
>Microsoft Visual C++ and Borland C++Builder. Get it at
> http://www.talula.demon.co.uk/allegro/
>
>Note: Allegro, when built for DOS, will not be able to use SVGA
>resolutions (anything over 320x200) under Windows NT because NT
>prohibits the sort of direct access required for SVGA. However, if you
>build with Micro$oft Visual C++ or MinGW, you'll get a Win32 program
>that uses DirectX.
>
>
>Q: What is DPMI?
>Q: When I try to run my program on my other computer, it gives me
>Load error: no DPMI; get csdpmi*b.zip
>
>A: DPMI, or the DOS Protected Mode Interface, is a method of
>communication between 32-bit DJGPP programs and 16-bit PC DOS (MS-DOS,
>DR DOS, FreeDOS). To run DJGPP programs in DOS mode (booting straight
>into DOS as opposed to a DOS emulation box in Windows), you'll need a
>DPMI host such as CWSDPMI. Download it from the DJGPP Zip Picker; then
>unzip cwsdpmi.exe into a folder on your PATH.
>
>
>Q: My program crashes. When I symify the traceback, the first EIP
>is inside the _free function.
>Q: I can run a program under Windows 95. Why does it SIGSEGV under
>plain DOS?
>Q: Why do I get different results if I run a program more than once?
>I didn't use any pseudorandom number generators.
>
>A. Your program most likely wrote beyond the end of a block or tried
>to access uninitialized memory or dereference a NULL pointer. Try a
>memory debugger such as YAMD. For more information, see section 9.2
>of the full DJGPP FAQ list.
>
>
>Q: My program doesn't work. Can someone on c.o.m.d help?
>
>A: The general consensus is that we'll help if you provide these five
>things:
>
>1. Version number of DJGPP, gcc, binutils, and any add-ons
> (Allegro, RSXNTDJ, etc.) you are using.
>2. Your operating system (DOS? Sin95? 98? NT? Linux cross-compiler?)
>3. The smallest source code fragment that produces the error. Often,
> trying to isolate the problem leads to an easy fix.
>4. The command line you are using to make the program.
>5. The exact error messages you get, either the error output from GCC
> (if you can't compile) or the output from symify.exe if there is a
> list of traceback EIPs (that is, if your program crashes at
> runtime).
>
>Otherwise, we're not psychics. :-)
>
>
>If you have any questions or comments, post them at
>comp.os.msdos.djgpp *or* mail them to djgpp AT delorie DOT com; if they're
>the most frequently asked, they may become part of this short FAQ
>list.
>
>Damian Yerrick
>
>
>11. Commonly Requested Files
>
>Allegro, a game I/O library
> http://www.talula.demon.co.uk/allegro/
>DLM, a dynamic linking package
> http://members.xoom.com/dosuser/dlm20b.zip
>RHIDE, an IDE for GCC
> http://www.lanet.lv/~pavenis/rhide.html
>
>Hate spam?
> http://spamcop.net/
>Looking for tetris?
> http://fordms2.student.rose-hulman.edu/~tetris/
>Looking for a book? Try Barnes & Noble.
>http://bn.bfast.com/booklink/click?sourceid=9831085&categoryid=homepage
>
>
>--
>Damian Yerrick
>"I refuse to listen to those who refuse to listen to reason."
>See the whole sig: http://www.rose-hulman.edu/~yerricde/sig.html
>
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