Linker errors migrating from QT4 to QT5 - Am stumped please help

Hello people,

I've been working on migrating my 32 bit QT4 app to 64 bit QT5 on Windows VC2010. Everything goes well until the final linkage phases of my app, at which point I get a slew of linker errors (LNK2001: unresolved external). It's apparent to me that the build process is not finding the right Windows lib files to against (maybe debug vs release, MT vs MD?), but I'm stumped at finding the actual problem.

Any ideas would be really helpful, even if it's just things to investigate.

My pro file and output are below. Here's some precursors. I'm using VC2010 with SDK7.1. I've built the QT library from source using the following config command...

configure -release -opensource -shared -platform win32-msvc2010 -ltcg -strip -no-openssl -no-accessibility -no-qml-debug -qt-sql-sqlite -opengl desktop -no-openvg -audio-backend -no-style-fusion -no-style-windowsce -no-style-windowsxp -no-style-windowsmobile -nomake examples -nomake tests -mp

I'm linking against the QT DLLs (shared). I'm building with the MD option. The QT framework appears to build fine, I can run designer.exe etc. I seem to get link errors associated with my use of boost and other (my own) libraries. I have no problem with building 64 bit non-QT console apps.

My pro file...

Code:

---

# -----------------------------------------------------------------------------
# CONFIGURATION
# -----------------------------------------------------------------------------
 
# Setup
TEMPLATE = app
CONFIG *= qt warn_on exceptions
QMAKE_MAKEFILE = makefile
QT *= widgets
 
# g++ compiler flags
*g++:QMAKE_CXXFLAGS *= -s
 
# Paths
TARGET = hwipe
DESTDIR = ./bin
INCLUDEPATH *= ./src
INCLUDEPATH *= $(DEVLIB_PATH)/dogma/inc
INCLUDEPATH *= $(DEVLIB_PATH)/adsa/inc
INCLUDEPATH *= $(DEVLIB_PATH)/cdog/inc
 
# Defines
DEFINES *= BOOST_NO_DEPRECATED
win32:DEFINES *= WINDOWS DOGMA_MSW
 
# LIBRARIES (shouldn't be needed under mingw)
win32-msvc*:LIBS *= -ladvapi32 -lshell32 -luser32 -lwinmm
 
contains(QMAKE_HOST.arch, x86_64) {
  DEFINES *= DOGMA_LIB64
  win32:LIBS *= -L$(DEVLIB_PATH)/dogma/lib/win64 -ldogma -ldogma-lang
  win32:LIBS *= -L$(DEVLIB_PATH)/adsa/lib/win64 -ladsa
 
  # Need path from MS SDK7.1
  win32:LIBS *= -L"C:/Program Files/Microsoft SDKs/Windows/v7.1/Lib"
  win32:LIBS *= -L"C:/Program Files/Microsoft SDKs/Windows/v7.1/Lib/x64"
 
 
} else {
  DEFINES *= DOGMA_LIB32
  win32:LIBS *= -L$(DEVLIB_PATH)/dogma/lib/win32 -ldogma -ldogma-lang
  win32:LIBS *= -L$(DEVLIB_PATH)/adsa/lib/win32 -ladsa
}
 
# SPECIAL LINKER (on MinGW we need to put this in rc file instead)
win32-msvc*:QMAKE_LFLAGS *= /MANIFESTUAC:\"level=\'asInvoker\' uiAccess=\'false\'\"
 
# Objects and temp files
OBJECTS_DIR = ./obj/release
RCC_DIR = ./tmp/rcc
MOC_DIR = ./tmp/moc
UI_DIR = ./tmp/uic
QMAKE_LINK_OBJECT_SCRIPT = ./tmp/object_script
 
# Needed only for external boost library
boost_external {
 
  INCLUDEPATH *= $(BOOST_PATH)
 
  contains(QMAKE_HOST.arch, x86_64) {
    LIBS *= -L$(BOOST_PATH)/stage/lib/x64
  } else {
    LIBS *= -L$(BOOST_PATH)/stage/lib/x86
  }
 
} else {
 
	LIBS *= -lboost_thread
 
}
 
# -----------------------------------------------------------------------------
# DEVELOPMENT BUILD
# -----------------------------------------------------------------------------
 
# Development build
dev_build {
 
  # Additional includes
  INCLUDEPATH *= $(DEVLIB_PATH)/tdog/inc
 
  # Additional Defines
  DEFINES *= HWIPE_DEBUG INTEG_DEBUG CDOG_BUILD_TRACE
 
  # Additional Libraries
  contains(QMAKE_HOST.arch, x86_64) {
    win32:LIBS *= -L$(DEVLIB_PATH)/tdog/lib/win64 -ltdog
    win32:LIBS *= -L$(DEVLIB_PATH)/cdog/lib/win64 -lcdog
  } else {
    win32:LIBS *= -L$(DEVLIB_PATH)/tdog/lib/win32 -ltdog
    win32:LIBS *= -L$(DEVLIB_PATH)/cdog/lib/win32 -lcdog
  }
 
}
 
# -----------------------------------------------------------------------------
# HEADER FILES
# -----------------------------------------------------------------------------
HEADERS *= src/main/hwapp.hpp
... etc
 
# -----------------------------------------------------------------------------
# SOURCE FILES
# -----------------------------------------------------------------------------
SOURCES *= src/main/hwapp.cpp
... etc

---

and here is the compiler link output...


1> moc_link_widget.cpp
1> link /NOLOGO /DYNAMICBASE /NXCOMPAT /MANIFESTUAC:"level='asInvoker' uiAccess='false'" /INCREMENTAL:NO /LTCG /SUBSYSTEM:WINDOWS "/MANIFESTDEPENDENCY:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' publicKeyToken='6595b64144ccf1df' language='*' processorArchitecture='*'" /MANIFEST /MANIFESTFILE:bin\hwipe.exe.embed.manifest /OUT:bin\hwipe.exe @C:\Users\andyt\AppData\Local\Temp\nm74B8.tmp
1>main_window.obj : error LNK2001: unresolved external symbol __imp_CreateEventA
1>libboost_thread-vc100-mt-1_49.lib(thread.obj) : error LNK2001: unresolved external symbol __imp_CreateEventA
1>libboost_thread-vc100-mt-1_49.lib(thread.obj) : error LNK2001: unresolved external symbol __imp_CloseHandle
1>main_window.obj : error LNK2001: unresolved external symbol __imp_CloseHandle
1>dogma.lib(file_utils.obj) : error LNK2001: unresolved external symbol __imp_CloseHandle

...

1>libboost_thread-vc100-mt-1_49.lib(thread.obj) : error LNK2001: unresolved external symbol __imp_CreateWaitableTimerA
1>qtmain.lib(qtmain_win.obj) : error LNK2001: unresolved external symbol __imp_GetCommandLineW
1>bin\hwipe.exe : fatal error LNK1120: 115 unresolved externals
1>NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\bin\x86_amd64\link.EXE"' : return code '0x460'
1> Stop.
1>NMAKE : fatal error U1077: '"C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\bin\nmake.exe"' : return code '0x2'
1> Stop.

Thank you!

Andy

That doesn't look Qt related, you seem to be getting linker errors for Boost.
Have you built Boost with the new compiler/settings?

Cheers,
_

Thanks for the reply. I'm still stuck on this, so help would be appreciated.

>Have you built Boost with the new compiler/settings?

I'm attempting to migrate the app from 32 bit from 64 bit, so yes. However, I'm trying to link against a 64 bit version of boost, and it's not just boost where I get linker errors, it's everywhere...

1>main_window.obj : error LNK2001: unresolved external symbol __imp_CloseHandle
1>dogma.lib(file_utils.obj) : error LNK2001: unresolved external symbol __imp_CloseHandle

domga.lib is my own library. I have both 32 bit and 64 bit builds of this and have no problem building non-QT consolve apps against either version. Why can't I build a QT app against it, where previously the 32 bit version built fine?

Clearly I'm missing something with the QT pro file, like something switch that says "64 bit" or something that should be completely obvious, but just isn't to me.

How can I track this down?

Solved. Solution here for others...

This line is needed in the pro-file to pick up the 64 bit libs...

win32:LIBS *= -L"C:/Program Files/Microsoft SDKs/Windows/v7.1/Lib/x64"

I had this previously (see pro file in first page), but also had an extra non-64 bit directory from the SDK. It started to build when I removed the other line.

Also had problems with boost "Macro argument mismatch bug" errors. Had to put this line in the pro file to solve this...

QMAKE_COMPILER_DEFINES = _WIN32

More here...

http://stackoverflow.com/questions/1...t-mismatch-bug