[cmake-developers] [CMake 0015491]: First-class support for GNU -iquote, -I- and -I=opt/foo include directory specifiers

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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http://public.kitware.com/Bug/view.php?id=15491 
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Reported By:                Stephen Kelly
Assigned To:                
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Project:                    CMake
Issue ID:                   15491
Category:                   (No Category)
Reproducibility:            have not tried
Severity:                   minor
Priority:                   normal
Status:                     new
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Date Submitted:             2015-04-01 22:44 CEST
Last Modified:              2015-04-01 22:44 CEST
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Summary:                    First-class support for GNU -iquote,  -I- and
-I=opt/foo include directory specifiers
Description: 

The -iquote and -I- options relate to how the compiler treats "" versus <>
includes.

 https://gcc.gnu.org/onlinedocs/cpp/Search-Path.html

All -iquote options are processed before any -I options. A new target property
and directory property and command interface could be added for it. 

The -I- is a divider. CMake could support it by accepting a placeholder of a
magic name in the INCLUDE_DIRECTORIES property. This would need to be allowed
only in non-transitive uses.

https://gcc.gnu.org/onlinedocs/cpp/Invocation.html#Invocation

 "If dir begins with =, then the = will be replaced by the sysroot prefix; see
--sysroot and -isysroot."

It is possible that CMake could learn to use that. I'm not certain whether that
would be useful though, as I think CMake already adds the sysroot as a prefix
during generation.

I have not checked other compilers for equivalent features.

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Issue History 
Date Modified    Username       Field                    Change               
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2015-04-01 22:44 Stephen Kelly  New Issue                                    
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