[Mingw-users] Convertin .a to .dll with mutual imports...

[Fredar M. <mik...@ae...>]

Hi!

Perhaps this is an easy question but I'll go through some background inf
anyway.

I have a problem converting a statically linked program into a
dynamically linked program.
What I have is a program that consists of three parts:
1: utbep (provides a nice packing to the rest of the program),=20
2: tso.a (contains opengl code, this is the library that I need to
convert into a dll)
3: libEp17-nt (contains runtime code such as unpacking and other stuff)
These three are depending upon eachother in the following way:

         **********                        ***********
         *        * -------------------->  *         *
         * utbep  *                        * ep17-nt *
         *        * <--------------------  *         *
         **********                        ***********
               |
               |                              |   /\
               |                              |    |
               |                              |    |
               |                              |    |
               |           **********         |    |
               |           *        * <-------|    |
               --------->  * tso.a  *              |
                           *        * -------------|
                           **********

What I've come up with after a long time of fiddling is the make script
below.
It took me a long time to get rid of all undefined symbols but as this
makefile
looks right now it compiles OK and I get all the files that I need.

I told you that the tso.a was the part that I need to turn into a .dll
but if you have a look
at the makefile below you'll see that I'm trying to make a dll out of
libep17-nt to.
I do this because utbep consists of both C and ADA code and I didn't
want to mess things up trying
to make def and exp files based on ADA code. Perhaps this isn't
necessary, I don't have the=20
correct info to say wether it is or isn't but the way I did it felt like
the way to go.=20
Correct me if I'm wrong.

Now, what happens when I run this is that the program tries to load
libep17-nt.dll but I get=20
a message that says:
The program couldn't be correctly initialized.
As far as I know this message has to do with the entrypoint of the dll
and I've tried to direct this to=20
these symbols without any luck what so ever.
_DllMainCRTStartup@12
_DllMain@12
_TI_DllMain@12
_EP17_DllMain@12

_TI_DllMain@12 and _EP17_DllMain@12 are my own entry points and look
like this.
************************************************************************
*************
{
MessageBox(0, "START", "ti", MB_OK);
switch(ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
MessageBox(0, "DLL_PROCESS_ATTACH", "ti", MB_OK);
break;
}
return TRUE;
}
************************************************************************
*************


If someone have an idea about what I can do to solve this I would be the
happiest man on earth...
Hmmm, well perhaps not the happiest but quite close to it.

Thanks...

Mikael








EP_DLL_OBJS=3D../../utaleprt/bin/libep17-nt.a ep17_dllmain.o
TI_DLL_OBJS=3D../../utaoti237/obj/tso.o ../../utaoti237/obj/tso.a
ti_dllmain.o
.
.
.
###### Build Starting point=20
dlll: utbep.exe libUtbepImport.a libEp17-nt.dll

###### Main application
utbep.exe: glFunctionsDYNAMIC g2_ver.o utbepver.o ti.dll
gnatmake -gnatf -g -I$(SOURCEDIR) -I$(IMPORTDIR) -I$(GLIMPORTDIR)
-I$(UTAOTIDIR) -L$(IMPORTDIR) -L$(UTALEPRTDIR) utbep \
-largs -lglut32 -lg2comnt -lwsock32 -luser32 -lgdi32 g2_ver.o -L.
-lTIImport -lEp17-ntImport \
c:/program/gnat/lib/libopengl32.a c:/program/gnat/lib/libglu32.a
glFunctions.o utbepver.o

###### TSO consists of tso.o tso.a and ti_dllmain.o
ti.dll: libEp17-ntImport.a tso.def ../../utaoti237/obj/tso.o
../../utaoti237/obj/tso.a ti_dllmain.o
@echo .
@echo *** Creating ti.dll ***
gcc -mdll -g -s $(TI_DLL_OBJS) -o $@
-Wl,--base-file,tso.base,-e,_TI_DllMain@12,-L.,-L$(UTALEPRTDIR),-lep17-n
tImport,-lopengl32,-luser32,-lglu32,-lgdi32
dlltool --base-file tso.base --def tso.def --output-exp tso.exp
--dllname ti.dll
gcc -mdll -g -s -Wl,--base-file,tso.base,tso.exp -o ti.dll
$(TI_DLL_OBJS)
-Wl,-e,_TI_DllMain@12,-L.,-L$(UTALEPRTDIR),-lep17-ntImport,-lopengl32,-l
user32,-lglu32,-lgdi32
dlltool --base-file tso.base --def tso.def --output-exp tso.exp
--dllname ti.dll
gcc -mdll -g -Wl,tso.exp -o ti.dll $(TI_DLL_OBJS)
-Wl,-e,_TI_DllMain@12,-L.,-L$(UTALEPRTDIR),-lep17-ntImport,-lopengl32,-l
user32,-lglu32,-lgdi32
dlltool --def tso.def --dllname ti.dll --output-lib libTIImport.a

###### libEp17-nt
libEp17-nt.dll: libEp17-ntImport.def $(EP_DLL_OBJS) ep17_dllmain.o
@echo .
@echo *** Creating libEp17-nt.dll ***
gcc -mdll -g -s $(EP_DLL_OBJS) -o $@
-Wl,-e,_EP17_DllMain@12,--base-file,libEp17-nt.base,-L.,-L$(UTALEPRTDIR)
,-lUtbepImport,-lTIImport,-lopengl32,-luser32,-lglu32,-lgdi32
dlltool --base-file libEp17-nt.base --def libEp17-ntImport.def
--output-exp libEp17-nt.exp --dllname libEp17-nt.dll
gcc -mdll -g -s -Wl,--base-file,libEp17-nt.base,libEp17-nt.exp -o
libEp17-nt.dll $(EP_DLL_OBJS)
-Wl,-e,_EP17_DllMain@12,-L.,-L$(UTALEPRTDIR),-lUtbepImport,-lTIImport,-l
opengl32,-luser32,-lglu32,-lgdi32
dlltool --base-file libEp17-nt.base --def libEp17-ntImport.def
--output-exp libEp17-nt.exp --dllname libEp17-nt.dll
gcc -mdll -g -Wl,libEp17-nt.exp -o libEp17-nt.dll $(EP_DLL_OBJS)
-Wl,-e,_EP17_DllMain@12,-L.,-L$(UTALEPRTDIR),-lUtbepImport,-lTIImport,-l
opengl32,-luser32,-lglu32,-lgdi32
dlltool --def libEp17-ntImport.def --dllname libEp17-nt.dll --output-lib
libEp17-ntImport.a

###### Create the tso import library
libTIImport.a: tso.def $(TI_DLL_OBJS)
@echo .
@echo - - - Creating libTIImport.a - - -
dlltool $(TI_DLL_OBJS) --dllname ti.dll --def tso.def --output-lib
libTIImport.a

###### Create the libEp17-nt import library
libEp17-ntImport.a: libEp17-ntImport.def
@echo .
@echo - - - Creating libEp17-ntImport.a - - -
dlltool ../../utaleprt/bin/libep17-nt.a --dllname libEp17-nt.dll --def
libEp17-ntImport.def --output-lib libEp17-ntImport.a
###### Create the tso def file, sedGetEXPSymbols.scr extracts the symbol
names out of the nm listing
tso.def: $(TI_DLL_OBJS)
@echo .
@echo - - - Creating tso.def - - -
@echo EXPORTS > tso.def
nm ../../utaoti237/obj/tso.o | sed -n -f sedGetEXPSymbols.scr >> tso.def
nm ../../utaoti237/obj/tso.a | sed -n -f sedGetEXPSymbols.scr >> tso.def
nm ti_dllmain.o | sed -n -f sedGetEXPSymbols.scr >> tso.def
###### Create the libEp17-nt def file, sedGetEXPSymbols.scr extracts the
symbol names out of the nm listing
libEp17-ntImport.def: $(EP_DLL_OBJS)
@echo .
@echo - - - Creating libEp17-ntImport.def - - -
@echo EXPORTS > libEp17-ntImport.def
nm ../../utaleprt/bin/libep17-nt.a | sed -n -f sedGetEXPSymbols.scr |
egrep -v -f grepFilterExpSymbols.scr >> libEp17-ntImport.def
nm ep17_dllmain.o | sed -n -f sedGetEXPSymbols.scr | egrep -v -f
grepFilterExpSymbols.scr >> libEp17-ntImport.def
###### Create the utbep import library
libUtbepImport.a: libUtbepImport.def
@echo .
@echo - - - Creating libUtbepImport.a - - -
dlltool utbep.exe --dllname utbep.exe --def libUtbepImport.def
--output-lib libUtbepImport.a
###### Create the utbep def file
libUtbepImport.def:
@echo .
@echo - - - Creating libUtbepImport.def - - -
@echo EXPORTS > libUtbepImport.def
nm utbep.exe | sed -n -f sedGetEXPSymbols.scr | egrep -v -f
grepFilterExpSymbols.scr >> libUtbepImport.def
###### Compile ti_dllmain.c
ti_dllmain.o: ti_dllmain.c
@echo .
@echo - - - Creating ti_dllmain.o - - -
$(CC) $(CFLAGS) -g -c ti_dllmain.c
###### Compile ep17_dllmain.c
ep17_dllmain.o: ep17_dllmain.c
@echo .
@echo - - - Creating ep17_dllmain.o - - -
$(CC) $(CFLAGS) -g -c ep17_dllmain.c