Mail Archives: cygwin/2004/09/23/12:19:47
> On Thu, 23 Sep 2004, Mikael Åsberg wrote:
>
>> Hello, I am using the latest Cygwin with all packages updated (running
>> Windows XP Professional SP2) and I'm having a problem with a simple C++
>> program that uses the Win32 API to scan a directory (recursively or
>> non-recursively, depending on user input). The code is as follows:
>>
>> [snip]
>> if(strcmp(argv[2], "--non-recursive") == 0) {
>> recursive = false;
>> cout << "Will perform a non-recursive scan of directory "
>> << argv[1] << "." << endl;
>> } else {
>> cerr << "Ignoring unknown option " << argv[2] << "." << endl;
>> }
>> [snip]
>
> Yours was by far not a minimal testcase. The above would have sufficed.
>
>> If I test this program with the following bash script:
>> #!/bin/bash
>> echo "Performing a scan without using recursion"
>> ./directory_scanner.exe c:\\coding\\cygwin\\c++\\ --non-recursive
>
> Does your bash script have DOS line endings? Try "d2u bashscript".
>
>> the output is:
>> Performing a scan without using recursion
>> Ignoring unknown option --non-recursive.
>> [Recursive listing snipped]
>>
>> If I compile the exactly the same code under MSVC++ 7.1 and invoke the
>> executable it produces with the exactly the same script, the output is:
>> Performing a scan without using recursion
>> Will perform a non-recursive scan of directory c:\coding\cygwin\c++\.
>> [Non-recursive listing snipped]
>>
>> What's going on here? Why doesn't strcmp() return 0 if compiled with g++
>> with the input given above?
>
> Apparently MSVCRT's startup code considers \r to be whitespace, and
> Cygwin's doesn't. Use Unix line endings, or put the script on a text
> mount.
> Igor
> --
> http://cs.nyu.edu/~pechtcha/
> |\ _,,,---,,_ pechtcha AT cs DOT nyu DOT edu
> ZZZzz /,`.-'`' -. ;-;;,_ igor AT watson DOT ibm DOT com
> |,4- ) )-,_. ,\ ( `'-' Igor Pechtchanski, Ph.D.
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>
> "Happiness lies in being privileged to work hard for long hours in doing
> whatever you think is worth doing." -- Dr. Jubal Harshaw
>
Lol, you're right, Igor, that test case was far from minimal. Should've cut
it down, of course. On the other hand, I often see people cutting away what
they think is unrelated code or whatnot, when, in fact, they are cutting
away the cause of their problems when posting questions.
Anyway, it's working as expected now. But to tell the truth I don't know
exactly what the problem was. I tinkered some with the script, did a make
clean ; make (again), and, voila, it works. I'm glad that it works, but it's
a bit annoying not understanding what the problem and the rememdy was.
Thanks for on-list replies and private emails
/ Mikael
PS. I remember once having the cygwin mailing list in "usenet style format"
in outlook express, but I can't for the life of me remember what I did.
Anyone knows what I'm talking about? DS.
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