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Thread: qmake: copy qt dlls to output directory

  1. #1
    Join Date
    Apr 2012
    Qt products

    Default qmake: copy qt dlls to output directory

    I googled this question but didn't find any working solution.

    Eventually I decided to ask it once again.

    Can anybody provide me with a WORKING example of pro-file that copies qt dlls into output directory?

    I tried this:
    Qt Code:
    1. CONFIG += qt release
    2. SOURCES += src/main.cpp
    4. message($(QTDIR)) # output: c:\Qt\4.8.4_vs2008\
    6. # Method 1
    7. qt_libs.path=release
    8. qt_libs.files=$(QTDIR)bin/QtCore4.dll
    9. INSTALLS += qt_libs
    11. # Method 2
    12. EXTRA_BINFILES += $(QTDIR)bin/QtCore4.dll
    13. EXTRA_OUT_FILES += release
    15. QMAKE_POST_LINK += $$quote(cp $${FILE} $$EXTRA_OUT_FILES $$escape_expand(\\n\\t))
    16. }
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    But it also doesn't work.
    $(QTDIR) suddenly becomes empty. Although message($(QTDIR)) above produces a valid path to qt installations.

  2. #2
    Join Date
    Mar 2009
    Brisbane, Australia
    Thanked 1,610 Times in 1,537 Posts
    Qt products
    Qt4 Qt5
    Unix/X11 Windows
    Wiki edits

    Default Re: qmake: copy qt dlls to output directory

    Have you tried using "$$(QTDIR)" (note the double dollar) at line 8? This should embed the value of the QTDIR environment variable into the Makefile rather than looking for the value at the time you run the Makefile.

    Your second option won't work on a Windows machine because "cp" is a UNIX copy command.

    This approach works on Linux without relying on an external QTDIR variable, and should also do so on Windows with appropriate name changes:
    Qt Code:
    1. qtlibs.path = release
    2. qtlibs.files += $$[QT_INSTALL_LIBS]/
    3. qtlibs.files += $$[QT_INSTALL_LIBS]/
    4. INSTALLS += qtlibs
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