Re: [Gm2] Compiling files in different folders.

[Giorgio]

Hi,

it works! If I understand correctly, even if I want to link only,
I have to pass a .mod file to the compiler.

Thanks a lot for the hint!
Giorgio
> > Hi,
> >
> > I am trying to compile a small Modula-2 project, using gm2.
> > I am on Ubuntu 10.04, and my version of the compiler is 'GNU Modula-2  1.0.3  
> > (20111001)'.
> >
> > My source files are in different folders:
> >
> > bin
> > src/common
> > src/mergesort
> > src/quicksort
> >
> > All source files are in common, mergesort, quicksort, bin is the target 
> > directory.
> > The main module is contained in
> >
> > src/common
> >
> > My Makefile is in the root directory, and looks like this:
> >
> > INC=-I../common -I../mergesort -I../quicksort
> > M2C=gm2 -flibs=iso,pim,logitech -fpim4
> >
> > build:
> >    @cd src ; \
> >    cd common ; \
> >    ${M2C} -c ${INC}<filename>.mod ; \    # One line for each .mod file
> >    cd ../mergesort ; \
> >    ${M2C} -c ${INC}<filename>.mod ; \    # One line for each .mod file
> >    cd ../quicksort ; \
> >    ${M2C} -c ${INC}<filename>.mod ; \    # One line for each .mod file
> >    cd ../common ; \
> >    ${M2C} -o ../../bin/myapp *.o ../mergesort/*.o ../quicksort/*.o
>
> Hi,
>
> the link looks incorrect.  You need to ask gm2 to use the main module to
> resolve the module dependencies and build the link command.  So
>
> ${M2C} -o ../../bin/myapp -fonlylink \
>         -fobject-path=.:../mergesort:../quicksort \
>         ${INC} mainmodule.mod
>
> should do the trick.
>
> hope this helps,
> Gaius
>
>
> > Everything runs fine (all the .mod files are compiled producing a .o file) until
> > the last line, where I want to link all the object files into an executable.
> > At this step, the linker complains that it cannot find certain symbols 
> > (procedure
> > names) that are defined in some of the modules. However, by inspecting
> > the .o files, I have verified that the missing symbols are indeed contained
> > in the object files I passed on the command line.
> >
> > As an alternative, I have tried using -fmakeall, but this works fine only if I 
> > put all source
> > files in the same directory. If the source files are not in the same directory,
> > -fmakeall does not work. Here is the command line I used:
> >
> > gm2 -fmakeall -o ../../bin/sort_runner -g -flibs=iso,pim,logitech -I. 
> > -I../mergesort -I../quicksort SortRunner.mod
> >
> > I get several error messages like
> >      .../src/common/SortRunner_m2.cpp:181: undefined reference to 
> > `_M2_StringArray_finish'
> > /tmp/ccGH2cB3.a(SortManager.o): In function `_M2_SortManager_init':
> >
> > or
> >
> >      ...src/common/SortManager.mod:88: undefined reference to 
> > `QuickSortList_QuickSortListAlgorithm'
> >
> > Note that module SortManager is in folder src/common, and has an undefined 
> > reference to module QuickSortList,
> > which is in folder src/mergesort.
> > On the other hand, Module SortRunner is also in src/common, and has an 
> > undefined reference to module
> > StringArray, which is in the same directory src/common.
> >
> > At the moment I do not know how to continue. I wanted to ask if I am doing 
> > something wrong (using the
> > wrong compiler options) or if this could be a compiler bug (as far as I 
> > understand from the documentation,
> > -fmakeall should find and compile all the module using the paths specified with 
> > -I).
> >
> > Thank you in advance for any useful hints.
> > Giorgio
> >
> >                                         
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