Special build requirements for a project

theCyclist

Sorry for the newbie question, I am building a Qt app that needs to interface with an Oracle database. This interface is implemented using Oracle's procC, where SQL statements can be embedded directly into the C/C++. At the moment the system works but the build process has two stages; one to compile the proc files and then the normal build process for a qt app. Could someone point me in the right direction so that I could incorporate the pro*c build commands into the .pro file? Obviously if I put these statements into the makefile then they can get removed if the makefile is rebuilt.

Thanks in advance.

John T,

sierdzio

You need to look into qmake variables reference. There are quite a few to choose from, that would help you with your task, depending on the exact circumstances. Here's a "link":http://developer.qt.nokia.com/doc/qt-4.8/qmake-variable-reference.html to reference, and a few example vars that might come in handy:

"QMAKE_PRE_LINK":http://developer.qt.nokia.com/doc/qt-4.8/qmake-variable-reference.html#qmake-pre-link
"QMAKE_POST_LINK":http://developer.qt.nokia.com/doc/qt-4.8/qmake-variable-reference.html#qmake-post-link

OF course, I assume here that you do use qmake and not other tools like scons, cmake etc.

theCyclist

Thanks for the quick response. I am half way to the solution by doing the following.

adding the QMAKE_PRE_LINK :
QMAKE_PRE_LINK=proc iname=myprocfile.pc;
gcc -c myprocfile.c

and then:
adding myprocfile.o to the LIBS list.

This does make the system build with one 'make' command however the dependencies do not work; if I update the myprocfile.pc file then the make command thinks there is nothing to do and I have to delete the executable file for a successful build. This is because what I really need is a PRE_BUILD var rather than a PRE_LINK; the proc command takes a .pc file, that contains a mixture of standard C/C++ and SQL and compiles this file into a .c file that gcc can compile.

Thanks

John T.

sierdzio

That's what I suspected. I'm not an expert on qmake, though. Any possibility of switching to cmake or scons? Or maybe, creating a shell script that would fire the "SQL" build first, and then proceed with qmake one?

theCyclist

[quote author="sierdzio" date="1327582767"]Or maybe, creating a shell script that would fire the "SQL" build first, and then proceed with qmake one?[/quote]

That is of course the obvious answer but I was not going to give in so quickly ;-)

John T.

sptrakesh

Maybe a simple makefile with a .c rule that works off the .pc file?

sierdzio

QMake would overwrite it.

theCyclist

I have done this for the moment:

As suggested I have a simple make file that builds the .c file from the oracle pro*c .pc file (oracle.mak). I have then added a new bash function called rmake which looks like this:

function rmake() { /usr/bin/make -f oracle.mak $@;/usr/bin/make $@;}

This way the dependencies are preserved and also the make clean works as well.

I chose the command 'rmake' as the software I am working on is modelling a radio system.

Thanks for your time Professor Sierdzio, it is very much appreciated.

John T

PS I should also add that I have removed the QMAKE_PRE_LINK stuff from my .pro file.