[cmake-developers] [CMake 0013742]: find_path() ought to pick up architecture-specific headers on multiarch systems

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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http://public.kitware.com/Bug/view.php?id=13742 
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Reported By:                Nick Hutchinson
Assigned To:                
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Project:                    CMake
Issue ID:                   13742
Category:                   CMake
Reproducibility:            always
Severity:                   minor
Priority:                   normal
Status:                     new
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Date Submitted:             2012-11-27 09:33 NZDT
Last Modified:              2012-11-27 09:33 NZDT
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Summary:                    find_path() ought to pick up architecture-specific
headers on multiarch systems
Description: 
On my Ubuntu 12.10 box, headers for libffi are located at
/usr/include/i386-linux-gnu/. This means that a simple find_path(FFI_INCLUDE_DIR
NAMES ffi.h) won't find the header, as /usr/include/i386-linux-gnu/ is not
searched by default. It ought to be; when compiling with either GCC or Clang,
this directory is in the default #include search list.

Steps to Reproduce: 
1. On a multiarch system, e.g. Ubuntu, attempt to use find_path() to find an
architecture-specific header.

Expected behaviour:
It "just works": CMake searches the appropriate include directory, without
requiring the user to add any supplementary search paths, suffixes, and so on.
This seems to be the behaviour with find_library(), for example.

Actual behaviour:
CMake fails to find the header.

Additional Information: 
I'm not sure how robust this is, but I'm currently working around this issue by
using the following:

find_file(FFI_INCLUDE_DIR NAMES ffi.h PATH_SUFFIXES
${CMAKE_LIBRARY_ARCHITECTURE})
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Issue History 
Date Modified    Username       Field                    Change               
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2012-11-27 09:33 Nick HutchinsonNew Issue                                    
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