[cmake-developers] [CMake 0015487]: Leading double slashes in path cause unparsable Xcode project

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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http://www.cmake.org/Bug/view.php?id=15487 
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Reported By:                Gregor Jasny
Assigned To:                
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Project:                    CMake
Issue ID:                   15487
Category:                   CMake
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
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Date Submitted:             2015-04-01 12:21 EDT
Last Modified:              2015-04-01 12:21 EDT
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Summary:                    Leading double slashes in path cause unparsable
Xcode project
Description: 
If the project source path start with a double slash the resulting Xcode project
cannot be parsed by Xcode.

I got the double slash at the beginning because my build orchestration script
tries to normalize the source path by calling "pwd -P".

So this:
$ pwd
/Volumes/Macintosh HD/Users/jasny/src/pathbug

was translated into 

$ pwd -P
//Users/jasny/src/pathbug

and passed to cmake invocation.

Multiple slashes are discussed here:
http://pubs.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap04.html#tag_04_11

A pathname consisting of a single slash shall resolve to the root directory of
the process. A null pathname shall not be successfully resolved. A pathname that
begins with two successive slashes may be interpreted in an
implementation-defined manner, although more than two leading slashes shall be
treated as a single slash.

I thought about adding a kind of normalization which replaces multiple slashes
with one but I'm unsure if this should be done globally or just in the Xcode
generator. I will also file a bug report with Apple.

Steps to Reproduce: 
project(Foo CXX)
add_library(foo STATIC foo.cpp)

cmake -GXcode //path/to/source

open Foo.xcodeproj

Result:
Project /Users/jasny/src/pathbug/build/Foo.xcodeproj cannot be opened because
the project file cannot be parsed.

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Issue History 
Date Modified    Username       Field                    Change               
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2015-04-01 12:21 Gregor Jasny   New Issue                                    
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