Qt creator 2.8.1 and Qt4.8.5, Windows libtiff

itsseven

[quote author="SGaist" date="1379282182"]No it's not, $$PWD should not be there and the paths should be quoted.

Did you try the example I wrote ?[/quote]

right. i linkend in debug with -ltiff, it seems works but still an error:
C:\Program Files (x86)\tiff-3.9.4\libtiff\libtiff.dll:-1: Fehler:file not recognized: File format not recognized+
this error means a bad dll file or?

SGaist

When does this error happen ?

itsseven

[quote author="SGaist" date="1379362425"]When does this error happen ?[/quote]

when i built the project..

SGaist

Can you show your complete pro file ?

itsseven

[quote author="SGaist" date="1379451486"]Can you show your complete pro file ?[/quote]

hi, this is:

#-------------------------------------------------

Project created by QtCreator 2013-09-03T20:35:28

#-------------------------------------------------

QT += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = js_v21
TEMPLATE = app

SOURCES += main.cpp
mainwindow.cpp
GUI.cpp
makeDNG.cpp

HEADERS += mainwindow.h
GUI.h
makeDNG.h

FORMS += mainwindow.ui

win32 {
LIBS += -L$$quote(C:/Program Files (x86)/tiff-3.9.4/libtiff)
CONFIG(release, debug|release): LIBS += -ltiff
CONFIG(debug, debug|release): LIBS += -ltiff
}

SGaist

I just forgot one basic question... What architecture are you building for ?

itsseven

[quote author="SGaist" date="1379489392"]I just forgot one basic question... What architecture are you building for ?[/quote]

Hi thanks for the help.
as stated when i built it said the libtiff.dll has a not recoginized format.
then i downloaded a libtiff,dll from internet and put it in the directory and now it works.
thanks.
but i still would like ask what does -ltiff mean? it means on linking, linkt to libtiff.dll? so what is the principle to write such thing?

thanks again...

SGaist

-ltiff means: link to the library file named tiff.lib.

On windows lib files are either static library (containing the actual library code) or stub files containing the information needed for the link phase, the dll being loaded at run time.

itsseven

[quote author="SGaist" date="1379533471"]-ltiff means: link to the library file named tiff.lib.

On windows lib files are either static library (containing the actual library code) or stub files containing the information needed for the link phase, the dll being loaded at run time.[/quote]

but there is no a file called tiff.lib in the install path only a file called libtiff.lib.....

SGaist

then use -llibtiff.

tiff vs libtiff is more a naming convention issue between VS libraries and gnu libraries