linking to a shared object in Linux
I'm trying to follow a very simple tutorial on using shared libraries. Unfortunately for me, the author of the tutorial used Windows as his platform, and I'm trying to do this on Linux.
I've created the library, and have moved them into the source directory of my app that is to use the library. When I build, I get this error message:
:-1: error: cannot find -l097sharedlib.so
I've put this line in my .pro file:
LIBS += -L/home/mzimmers/QtStuff/tutorials/098sharedlibuser -l097sharedlib.so
According the wiki, this should work. What might I be doing wrong?
Ordinarily libraries are prefixed on Linux, so a library named
SomeLibrarywill be present on the filesystem as
libSomeLibrary.so. Whenever you link it through the
LIBSvariable you don't specify the prefix nor the suffix, so you'd link as:
LIBS += -L/path/to/some/library -lSomeLibrary
Hi, Kshegunov -
Thanks for that; I'd forgotten about that little Linux nauance. Unfortunately, it's still giving me the same error code. Here's the .pro file:
QT += core QT -= gui CONFIG += c++11 TARGET = 098sharedlibuser CONFIG += console CONFIG -= app_bundle LIBS += -L/home/mzimmers/QtStuff/tutorials/098sharedlibuser -l097sharedlib TEMPLATE = app SOURCES += main.cpp # The following define makes your compiler emit warnings if you use # any feature of Qt which as been marked deprecated (the exact warnings # depend on your compiler). Please consult the documentation of the # deprecated API in order to know how to port your code away from it. DEFINES += QT_DEPRECATED_WARNINGS # You can also make your code fail to compile if you use deprecated APIs. # In order to do so, uncomment the following line. # You can also select to disable deprecated APIs only up to a certain version of Qt. #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0 HEADERS += \ _097sharedlib.h \ _097sharedlib_global.h
Oops - disregard my latest message. I'd neglected the "_" at the start of the library name. Now I build OK. Thanks!