Using FMod library with Qt Creator crashes the program.

Aaron Kim

The same error in this post occurs . It seems that it can not find corresponding lib.

QT       += core gui widgets

TARGET = fmod
TEMPLATE = app

DEFINES += QT_DEPRECATED_WARNINGS


CONFIG += c++11

SOURCES += \
        main.cpp \
        mainwindow.cpp

HEADERS += \
        mainwindow.h

FORMS += \
        mainwindow.ui

qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

INCLUDEPATH += "D:/FMOD Studio API Windows/api/lowlevel/inc"
LIBS += D:\FMOD Studio API Windows\api\lowlevel\lib\fmod.dll

This is my pro file. I'm using minGW as compiler.

The fmod.dll file do exist.

[+EDIT]
I found that it does not crash if I execute the result executable file directly. (Maybe this is because I added the lib path to system path).

[+EDIT2]
It doesn't crash if I put the fmod.dll in the directory where result exectuable file is. Why does this happen? I can't understand why it can not find a dll file even though I specify the path of it.

Aaron Kim

It works after I remove the path of lib from the system path. I have no idea what blocks the execution.

aha_1980

Hi @Aaron-Kim,

if you use paths with spaces or non-ASCII chars in it, you can expect trouble everywhere. Please avoid this.
The libs lines should be something like:
LIBS += -LD:/FMOD Studio API Windows/api/lowlevel/lib -lfmod

Note the forward slashes, the "-L" for the path and the "-l" for the linker include, not for the DLL!

And please, please rename FMOD Studio API Windows to something without spaces (e.g. FMOD_Studio_API_Windows).

Regards

Aaron Kim

@aha_1980 Thanks! It works. Do you mind if I ask the difference between

LIBS += -LD:/FMOD Studio API Windows/api/lowlevel/lib -lfmod

and

LIBS += D:/FMOD Studio API Windows/api/lowlevel/lib/fmod.dll

this?

SGaist

Hi,

In the first one, you tell the linker where it can find the .lib file (either a static or import library) and the name of the library you want to link to.

The second line you just add the path to a .dll file which won't help because the linker don't know what to do with that kind of input.