[cmake-developers] [CMake 0013995]: Builtin automoc doesn't automatically include system include path.

[Mantis Bug Tracker]

The following issue has been SUBMITTED. 
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http://www.cmake.org/Bug/view.php?id=13995 
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Reported By:                Yichao Yu
Assigned To:                
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Project:                    CMake
Issue ID:                   13995
Category:                   CMake
Reproducibility:            always
Severity:                   major
Priority:                   urgent
Status:                     new
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Date Submitted:             2013-03-09 00:42 EST
Last Modified:              2013-03-09 00:42 EST
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Summary:                    Builtin automoc doesn't automatically include system
include path.
Description: 
When qt is not installed in /usr/include (e.g. installed in /usr/include/qt4
instead), which is the default system include dir, the moc command line
generated by builtin automoc doesn't have -I/usr/include argument, even if it
has been explicitly added as include dir by include_directories, causing moc not
able to find headers installed in the system include dir. Since this is the path
the compiler will search anyway (unless using some special switch to turn off
maybe?), moc should also search in this(these) path(s), especially when a
dependency library has headers installed in it and therefore had added it
explicitly.

Since moc may has no idea what exactly the system include dir is (it's not gcc
anyway) not to mention whether it has been explicitly added using
include_directories in cmake, while cmake has access to these info, cmake should
pass these dir as command line arguments (may put them at the end though).


Steps to Reproduce: 
1. Install qt's header in /usr/include/qt4 (so that qt4' qmake -query
QT_INSTALL_HEADERS gives /usr/include/qt4) (just as what is done in archlinux's
package).
2. Install phonon from git, which has headers installed in /usr/include/phonon
and require /usr/include to be in the include path and also uses cmake's builtin
automoc for newer cmake in it's git version.
3. Try compiling phonon-vlc from git, using make VERBOSE=1, error will be
reported causing by not being able to find the definition of an interface which
is actually defined in one of the headers in /usr/include/phonon (which is
actually included by that header using #include <phonon/**.h>), the command line
shows that -I/usr/include is not in the command line argument and strace the
command line also shows the correct path is not searched. Adding -I/usr/include
to command line argument works well.


Additional Information: 
the automoc package works perfect.

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Issue History 
Date Modified    Username       Field                    Change               
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2013-03-09 00:42 Yichao Yu      New Issue                                    
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