Code::Blocks Forums

User forums => General (but related to Code::Blocks) => Topic started by: kisoft on July 24, 2012, 03:26:44 pm

Title: Environment var "Path" problem
Post by: kisoft on July 24, 2012, 03:26:44 pm

I have a problem with PATH on run my project from Code::Blocks.

You can see a test project into attached archive (MinGW project, Windows XP SP3).

Steps for test:
1. Add element to the PATH environment variable. Element - is relative path(!!!), for ex. "..\dll".
  1.1. For example: "PATH=ABC;"
  1.2. After addition: "PATH=ABC;..\dll;"
2. Start Code::Blocks and load a my test project. Rebuild it and start.
  2.1. Output see like this: "PATH=ABC;Programs\dll" instead "PATH=ABC;..\dll". Wrong. Why Code::Blocks do resolved a ".." to  relative path?
3. Close project and quit from Code::Blocks.
4. Start from command line: gcctest.exe
  4.1. Output see like this: "PATH=ABC;..\dll". Ok.

On revision 7929 Code::Blocks worked by 4.1., on revision 8153 - by 2.1.

Question: Why Code::Blocks do resolved a ".." to relative path?

Windows XP SP3 32-bit.
Code::Blocks rev. 7929 & 8153 (self compiled versions)
wxWidgets 2.8.12
gcc.EXE (tdm-1) 4.5.2

Thanks! Sorry for my bad english.

Title: Re: Environment var "Path" problem
Post by: ollydbg on August 30, 2012, 05:39:44 pm

I can confirm this bug. But no time to dig further, I think you can read and debug the code in compiler plugin

Code

void CompilerGCC::SetupEnvironment()
.....

Title: Re: Environment var "Path" problem
Post by: ollydbg on August 31, 2012, 07:22:29 am

Quote from: ollydbg on August 30, 2012, 05:39:44 pm

I can confirm this bug. But no time to dig further, I think you can read and debug the code in compiler plugin

Code

void CompilerGCC::SetupEnvironment()
.....

This function is called when the compiler plugin was loaded in CB start up.
I just enabled the debug log in this function(it log out the PATH before and after the change), I can confirm that the value "..\dll" was changed to something like "src\dll" like string.

Title: Re: Environment var "Path" problem
Post by: kisoft on August 31, 2012, 08:57:21 am

Thanks, ollydbg!

I will try see this method and debug it.

I have no time too, but will try read and debug.

Good luck!

Title: Re: Environment var "Path" problem
Post by: ollydbg on August 31, 2012, 10:13:34 am

I found the bug, to reproduce this bug, you can try the code below:

Code

    wxPathList pathArray;
    pathArray.AddEnvList(_T("PATH"));  // 1
    pathArray.Add(_T("..\\dll"));           // 2

    wxPathList newPathArray;
    newPathArray.Add(pathArray);       //3

1, if you have "..\\xyz" like string in your PATH, those string will directly added to pathArray without any normalization.
2, wxWidgets will internally call "wxFileName::Normalize" in somewhere to expand the "..", so when this finished, you get a changed value, in my case, ".." was converted to "SomeParentPath", so you get something like "SomeParentPath\\dll" in the pathArray.
3, when running the step 3, wxWidgets will run "Normalize" on every piece of the pathArray, so there will be no ".." in the newPathArray.

Note: In the compiler plugin's source code, there is no such "step 2", so ,initially, the pathArray is OK, but it do have a "step 3", so finally, your ".." will be expanded.