Including .pro Files: Difference between revisions
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'''English''' [[IncludingProFiles | '''English''' [[IncludingProFiles Malay|Malay]] [[IncludingProFiles Spanish|Spanish]] [[IncludingProFiles_German|German]] [[IncludingProFiles_French|French]] [[IncludingProFiles_Bulgarian|Български]]<br />[[Category:Tools]]<br />[[Category:HowTo]] | ||
=Including pro-files into pro-files= | = Including pro-files into pro-files = | ||
QMake's project files sometimes need to rely on the include feature. This is a great tool, but there are some tricks of the trade to be aware of. | |||
First up, a convention, pro-files meant for inclusion in other pro-files are commonly named | First up, a convention, pro-files meant for inclusion in other pro-files are commonly named '''.pri, just to indicate that they are for inclusion. This also means that qmake does not find them, but uses the appropriate pro-file instead. | ||
<br />In a pro-file, you have two important variables: INCLUDEPATH and DEPENDPATH. The first is used by the C++ compiler when resolving #include statements, while the latter is used by qmake when trying to determine what to build in which order. | |||
<br />To create a truly movable source tree, the pri-files update these variables appropriately. My trick to do that is to rely on the current working directory. You find that by running the $$system&amp;#40;pwd&amp;#41; command (on Unix/Linux only - sorry). | |||
<br />Within the "qmake variable reference&quot;:http://doc.qt.nokia.com/4.7/qmake-variable-reference.html , there are variables that may help find the current working directory (Tested on Windows ). A couple of these are:<br />''' "'''PWD'''":http://doc.qt.nokia.com/4.7/qmake-variable-reference.html#pwd<br />'''''' This variable contains the full path leading to the directory where the qmake project file &#40;project.pro&amp;#41; is located.<br />* "'''OUT_PWD'''":http://doc.qt.nokia.com/4.7/qmake-variable-reference.html#out-pwd<br />'''''' This variable contains the full path leading to the directory where qmake places the generated Makefile.<br />* Usage of the $$ prefix is detailed "here&quot;:http://doc.qt.nokia.com/latest/qmake-advanced-usage.html#variables . | |||
When having setup the include and depend paths, it is just a matter of adding to the SOURCES, HEADERS, RESOURCES and FORMS sections. | |||
To | To summarize, here is a small example: | ||
<code>INCLUDEPATH ''= $$system&amp;#40;pwd&amp;#41;/include<br />DEPENDSPATH''= $$system&amp;#40;pwd&amp;#41; | |||
SOURCES ''= src/foo.cpp<br />HEADERS''= include/foo.h<br />FORMS ''= forms/foo.ui<br />RESOURCES''= foo.qrc<br /></code> | |||
Finally, in the pro-file, simply add the pri-file by calling include: | Finally, in the pro-file, simply add the pri-file by calling include: | ||
<code>…<br />include(support/foo/foo.pri)<br />…<br /></code> | |||
== Caveats == | |||
Revision as of 14:32, 23 February 2015
English Malay Spanish German French Български
Including pro-files into pro-files
QMake's project files sometimes need to rely on the include feature. This is a great tool, but there are some tricks of the trade to be aware of.
First up, a convention, pro-files meant for inclusion in other pro-files are commonly named .pri, just to indicate that they are for inclusion. This also means that qmake does not find them, but uses the appropriate pro-file instead.
In a pro-file, you have two important variables: INCLUDEPATH and DEPENDPATH. The first is used by the C++ compiler when resolving #include statements, while the latter is used by qmake when trying to determine what to build in which order.
To create a truly movable source tree, the pri-files update these variables appropriately. My trick to do that is to rely on the current working directory. You find that by running the $$system&#40;pwd&#41; command (on Unix/Linux only - sorry).
Within the "qmake variable reference":http://doc.qt.nokia.com/4.7/qmake-variable-reference.html , there are variables that may help find the current working directory (Tested on Windows ). A couple of these are:
"PWD":http://doc.qt.nokia.com/4.7/qmake-variable-reference.html#pwd
' This variable contains the full path leading to the directory where the qmake project file (project.pro&#41; is located.
* "OUT_PWD":http://doc.qt.nokia.com/4.7/qmake-variable-reference.html#out-pwd
' This variable contains the full path leading to the directory where qmake places the generated Makefile.
* Usage of the $$ prefix is detailed "here":http://doc.qt.nokia.com/latest/qmake-advanced-usage.html#variables .
When having setup the include and depend paths, it is just a matter of adding to the SOURCES, HEADERS, RESOURCES and FORMS sections.
To summarize, here is a small example:
INCLUDEPATH ''= $$system&amp;#40;pwd&amp;#41;/include<br />DEPENDSPATH''= $$system&amp;#40;pwd&amp;#41;
SOURCES ''= src/foo.cpp<br />HEADERS''= include/foo.h<br />FORMS ''= forms/foo.ui<br />RESOURCES''= foo.qrc<br />
Finally, in the pro-file, simply add the pri-file by calling include:
…<br />include(support/foo/foo.pri)<br />…<br />