I might know what the problem is. I have to run ranlib to create the
index of the archieve.
How to do it at QT Creator ?
Am Freitag, den 22.10.2010, 01:17 +1100 schrieb Alexander 'hatred'
Drozdoff:
> В Thu, 21 Oct 2010 13:32:55 +0200
> Erwin Brandenberger <bra...@heag.ch> пишет:
>
> EB> Yes of course, the library will be build:
> EB>
> EB> ar cqs libfoo.a foo.o
> EB>
>
> Is compilation fail if you instead -lfoo pass full path to libfoo.a? like
> LIBS += /path/libfoo.a
> ???
> Look like linker does not found library in path... Try to add -L/path/to/lib
>
> But also it look like is not Qt Creator related problem :-)
>
> EB>
> EB>
> EB> Am Donnerstag, den 21.10.2010, 14:24 +0300 schrieb Alex T.:
> EB> > Do you have libfoo.a in that directory after compilation? Because it
> EB> > looks like that you will have only foo.o there.
> EB> >
> EB> > On 21 October 2010 14:17, Erwin Brandenberger <bra...@heag.ch> wrote:
> EB> > The qt creators foo.pro file looks like this:
> EB> >
> EB> > QT -= core gui
> EB> > TARGET = foo
> EB> > TEMPLATE = lib
> EB> > CONFIG += staticlib warn_off
> EB> > unix:DEFINES += RUN_LINUX \
> EB> > RUN_UNIX
> EB> > win32:DEFINES += RUN_NT
> EB> >
> EB> > Yes there is a -fPIC option set. Do I have to switch off it ?
> EB> > How do I do it ?
> EB> >
> EB> > gcc -c -pipe -g -w -fPIC -D_REENTRANT -DRUN_LINUX -DRUN_UNIX
> EB> > -I/usr/share/qt4/mkspecs/linux-g++ -IDESTDIR -I= -I. -o foo.o
> EB> > foo.c
> EB> >
> EB> >
> EB> >
> EB> >
> EB> > Am Donnerstag, den 21.10.2010, 18:53 +1100 schrieb Alexander
> EB> > 'hatred'
> EB> > Drozdoff:
> EB> >
> EB> > > В Wed, 20 Oct 2010 10:34:06 +0200
> EB> > > Erwin Brandenberger <bra...@heag.ch> пишет:
> EB> > >
> EB> > > EB> I like to compile c code building a static library and
> EB> > then linking this
> EB> > > EB> library from a c++ project.
> EB> > > EB>
> EB> > > EB> But for all c-function calls I get undefined reference.
> EB> > > EB>
> EB> > >
> EB> > > What compilation options do you use for build library? Do
> EB> > you use [in gcc/mingw32 cases] -fPIC
> EB> > > options for build objects from your foo.c?
> EB> > >
> EB> > > EB> The static c-library is referenced by the c++ project in
> EB> > the .pro file:
> EB> > > EB> LIBS += -lfoo
> EB> > > EB>
> EB> > > EB>
> EB> > > EB> What goes wrong ?
> EB> > > EB>
> EB> > > EB>
> EB> > > EB> The c files look like this:
> EB> > > EB>
> EB> > > EB> int foo(int a)
> EB> > > EB> {
> EB> > > EB> return(a);
> EB> > > EB> }
> EB> > > EB>
> EB> > > EB>
> EB> > > EB> and the header files:
> EB> > > EB>
> EB> > > EB> #ifdef __cplusplus
> EB> > > EB> extern "C" {
> EB> > > EB> #endif
> EB> > > EB>
> EB> > > EB> int foo(int a);
> EB> > > EB>
> EB> > > EB> #ifdef __cplusplus
> EB> > > EB> } /* extern "C" */
> EB> > > EB> #endif
> EB> > > EB>
> EB> > > EB>
> EB> > > EB> and the project file parameters:
> EB> > > EB>
> EB> > > EB> QT -= core gui
> EB> > > EB> TEMPLATE = lib
> EB> > > EB> CONFIG += staticlib
> EB> > > EB>
> EB> > >
> EB> > >
>
>
>
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