Re: [Zope] Backslash as line continuation in C (Unix)
On Tue, Sep 12, 2000 at 09:45:53PM -0700, Hung Jung Lu wrote: I am trying to build a third-party utility in Linux. I ran into troubles in the compilation process because of the usage of backslash \ as line continuation. (This is used in #def preprocessor macro statements.) When I remove the backslashes and join the lines, it compiles fine. (I know backslashes are fine in Windows Visual C++.) Do the lines really END with a backslash? There should be no problems with standard C constructs, but for the backslash to work as expected it really must be the last character in the line; there must be no white space characters after it. If your files are properly processed by some Windows compiler and have problems under Linux, I can think of two explanations: Either the Windows compiler is being "tolerant" with improper white space after the "\"... Or your source files get white space after the "\" only when transported to Linux; this may happen if under Linux the lines of your source files still end with CR-LF (carriage return, line feed) as they do in Windows, instead of only LF (the expected end of line character in Unix). For all the other lines, perhaps the compiler doesn't care about the extra CRs (they just count as white space), but they may become critical for line continuation: where you are expecting a line to end with "\", your Linux compiler may in fact see \ CR LF [the last (pre-LF) line character is CR, not "\" as expected] instead of the proper sequence \ LF[the last (pre-LF) line character is "\", marking continuation] If you have in Linux a small program called "fromdos", try to convert your source files with it; the same conversion of line endings can also be easily made with "tr", for instance. -- jmce: +351 919838775 ~ http://artenumerica.com/ ~ http://artenumerica.org/ ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Backslash as line continuation in C (Unix)
Or your source files get white space after the "\" only when transported to Linux; this may happen if under Linux the lines of your source files still end with CR-LF (carriage return, line feed) as they do in Windows, instead of only LF (the expected end of line character in Unix). Yeap yeap, this is exactly the problem. :) I have written a small Python program and got rid of the CR characters. The problem must have happened when the original author FTP'ed the files in binary mode from Windows onto a Unix machine. Thanks to everyone that have helped! Hung Jung _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Backslash as line continuation in C (Unix)
Hung Jung Lu writes: ... I ran into troubles in the compilation process because of the usage of backslash \ as line continuation. (This is used in #def preprocessor macro statements.) When I remove the backslashes and join the lines, it compiles fine Does anyone know any other better solution than go into the code and explicitly remove the backslashes? Is there any gcc option that recognizes backslashes are line-joining characters? Or is there another character used in gcc for joining lines? Any other suggestions? Backslashes *ARE* line-joining characters for gcc -- without any options! I expect, that your backslashes are not immediately followed by "\n" (not "\r\n"!). Then, they would not be "line joining"! This very easily happens, if you transfer a Windows source onto a Unix system. I do not know, which editor you are using under Linux. If you use "vim", then you would not see the "\r" preceeding the "\n" but you would see a "textmode" in the status line. Use ":set notextmode" and then write the file back. This would remove the "\r". You may use the "tr" utility, too, for the "\r" removal, once you determined that this indeed is the problem. Dieter ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
[Zope] Backslash as line continuation in C (Unix)
Hi, This is a Unix C question. But since I am doing something that ultimately results in a Zope product, I might as well ask the question here. :) I am trying to build a third-party utility in Linux. I ran into troubles in the compilation process because of the usage of backslash \ as line continuation. (This is used in #def preprocessor macro statements.) When I remove the backslashes and join the lines, it compiles fine. (I know backslashes are fine in Windows Visual C++.) Does anyone know any other better solution than go into the code and explicitly remove the backslashes? Is there any gcc option that recognizes backslashes are line-joining characters? Or is there another character used in gcc for joining lines? Any other suggestions? regards, Hung Jung _ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
