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Date Submitted

Last Update

0013910

CMake

public

2013-02-13 08:19

2013-02-16 04:07

Reporter

Evgeniy Stepanov

Assigned To

Peter Kuemmel

Priority

normal

Severity

minor

Reproducibility

always

Status

closed

Resolution

not fixable

Platform

x86_64

Linux

OS Version

Ubuntu 12.04

Product Version

CMake 2.8.10.2

Target Version

Fixed in Version

CMake 2.8.10.2

Summary

0013910: Ninja generator initialization fails if /usr/bin/ninja is not world-readable

Description

CMake tests availability or Ninja by access(, R_OK). This does not make any sense - it's not going to read /usr/bin/ninja, it's going to execute it!

"--x" ninja binary results in a cryptic failure message, as shown below.

Steps To Reproduce

$ ls -la /usr/bin/ninja
-rwxr-x--x 1 root root 2746829 Feb 13 16:36 /usr/bin/ninja

$ cmake -GNinja ..
CMake Error: CMake was unable to find a build program corresponding to "Ninja". CMAKE_MAKE_PROGRAM is not set. You probably need to select a different build tool.

strace shows:
access("ninja", R_OK) = -1 ENOENT (No such file or directory)
access("/usr/local/bin/ninja", R_OK) = -1 ENOENT (No such file or directory)
access("/usr/sbin/ninja", R_OK) = -1 ENOENT (No such file or directory)
access("/usr/bin/ninja", R_OK) = -1 EACCES (Permission denied)
access("/sbin/ninja", R_OK) = -1 ENOENT (No such file or directory)
access("/bin/ninja", R_OK) = -1 ENOENT (No such file or directory)

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Notes
(0032307) Peter Kuemmel (developer) 2013-02-16 04:06	Call ls /usr/bin -l , and you will see that all tools are readable by "others". Or is it not the case on you system? sudo chmod o+r /usr/bin/ninja fixes the issue. This is not ninja specific. It is how SystemTools::FindProgram() works.

Issue History
Date Modified	Username	Field	Change
2013-02-13 08:19	Evgeniy Stepanov	New Issue
2013-02-13 09:02	Brad King	Assigned To	=> Peter Kuemmel
2013-02-13 09:02	Brad King	Status	new => assigned
2013-02-16 04:06	Peter Kuemmel	Note Added: 0032307
2013-02-16 04:07	Peter Kuemmel	Status	assigned => closed
2013-02-16 04:07	Peter Kuemmel	Resolution	open => not fixable
2013-02-16 04:07	Peter Kuemmel	Fixed in Version	=> CMake 2.8.10.2