Thread: linux, bsd, i386-solaris and univel shared libraries.
linux, bsd, i386-solaris and univel shared libraries.
From
darrenk@insightdist.com (Darren King)
Date:
For the linux, bsd, i386-solaris and univel ports, ... If I were to try to make foo$(DLSUFFIX) from bar.c and bah.c, I would think the general sequence of events would be: 1. $(CC) $(CFLAGS_SL) -o bar.o bar.c 2. $(CC) $(CFLAGS_SL) -o bah.o bah.c 3. $(LD) $(LDFLAGS_SL) -r -o foo.o bar.o bah.o 4. $(LD) $(LDFLAGS_SL) -o foo$(DLSUFFIX) foo.o Could someone for each port tell me what $(CFLAGS_SL) and $(LDFLAGS_SL) are needed for each of these steps? I have reworked the libpq Makefile to make a shared libpq for aix and I'd like to move the libpq port-specific code to the port Makefiles without breaking it. Any help from others with shared library knowledge on these ports would be greatly appreciated. darrenk
Darren King writes: > > For the linux, bsd, i386-solaris and univel ports, ... > > If I were to try to make foo$(DLSUFFIX) from bar.c and bah.c, I would > think the general sequence of events would be: > > 1. $(CC) $(CFLAGS_SL) -o bar.o bar.c > 2. $(CC) $(CFLAGS_SL) -o bah.o bah.c > 3. $(LD) $(LDFLAGS_SL) -r -o foo.o bar.o bah.o > 4. $(LD) $(LDFLAGS_SL) -o foo$(DLSUFFIX) foo.o > > Could someone for each port tell me what $(CFLAGS_SL) and $(LDFLAGS_SL) > are needed for each of these steps? Linux: CFLAGS_SL: -fpic LDFLAGS_SL: -shared -soname foo$(DLSUFFIX_WITH_MAJOR_VERSION_NUMBER) I hope I didn't miss anything. Michael -- Dr. Michael Meskes, Project-Manager | topsystem Systemhaus GmbH meskes@topsystem.de | Europark A2, Adenauerstr. 20 meskes@debian.org | 52146 Wuerselen Go SF49ers! Go Rhein Fire! | Tel: (+49) 2405/4670-44 Use Debian GNU/Linux! | Fax: (+49) 2405/4670-10
On Fri, Apr 24, 1998 at 11:18:27 +0200, Michael Meskes wrote:
> Darren King writes:
> >
> > For the linux, bsd, i386-solaris and univel ports, ...
> >
> > If I were to try to make foo$(DLSUFFIX) from bar.c and bah.c, I would
> > think the general sequence of events would be:
> >
> > 1. $(CC) $(CFLAGS_SL) -o bar.o bar.c
> > 2. $(CC) $(CFLAGS_SL) -o bah.o bah.c
> > 3. $(LD) $(LDFLAGS_SL) -r -o foo.o bar.o bah.o
> > 4. $(LD) $(LDFLAGS_SL) -o foo$(DLSUFFIX) foo.o
> >
> > Could someone for each port tell me what $(CFLAGS_SL) and $(LDFLAGS_SL)
> > are needed for each of these steps?
>
> Linux:
>
> CFLAGS_SL: -fpic
^^^^
The shared library must be compiled with `-fPIC', and the static version
must not be. In other words, each `*.c' file is compiled twice.
> LDFLAGS_SL: -shared -soname foo$(DLSUFFIX_WITH_MAJOR_VERSION_NUMBER)
>
> I hope I didn't miss anything.
Take a look at the debian policy manual :-)).
Here is the patch against the `ecpg/lib/Makefile.in'.
======================Makefile.in.patch===============================
--- Makefile.in.old Wed Apr 22 13:36:00 1998
+++ Makefile.in Fri Apr 24 12:59:34 1998
@@ -22,3 +22,2 @@
LDFLAGS_SL = -shared -soname libecpg.so.$(SO_MAJOR_VERSION)
- CFLAGS += $(CFLAGS_SL)
endif
@@ -48,4 +47,4 @@
-$(shlib): ecpglib.o typename.o
- $(LD) $(LDFLAGS_SL) -o $@ ecpglib.o typename.o
+$(shlib): ecpglib.sho typename.sho
+ $(LD) $(LDFLAGS_SL) -o $@ ecpglib.sho typename.sho
ln -sf $@ libecpg.so
@@ -53,3 +52,3 @@
clean:
- rm -f *.o *.a core a.out *~ $(shlib) libecpg.so
+ rm -f *.o *.sho *.a core a.out *~ $(shlib) libecpg.so
@@ -71,4 +70,9 @@
ecpglib.o : ecpglib.c ../include/ecpglib.h ../include/ecpgtype.h
- $(CC) $(CFLAGS) -I../include $(PQ_INCLUDE) -c ecpglib.c
+ $(CC) $(CFLAGS) -I../include $(PQ_INCLUDE) -c $< -o $@
typename.o : typename.c ../include/ecpgtype.h
- $(CC) $(CFLAGS) -I../include $(PQ_INCLUDE) -c typename.c
+ $(CC) $(CFLAGS) -I../include $(PQ_INCLUDE) -c $< -o $@
+
+ecpglib.sho : ecpglib.c ../include/ecpglib.h ../include/ecpgtype.h
+ $(CC) $(CFLAGS) $(CFLAGS_SL) -I../include $(PQ_INCLUDE) -c $< -o $@
+typename.sho : typename.c ../include/ecpgtype.h
+ $(CC) $(CFLAGS) $(CFLAGS_SL) -I../include $(PQ_INCLUDE) -c $< -o $@
======================Makefile.in.patch===============================
Regards,
-- Alen
----------------------------------------------------------------------
Alen Zekulic <azekulic@debian.org>
Key fingerprint = 47 82 56 37 1D 94 94 F8 16 C1 D8 33 1D 9D 61 73
Alen Zekulic writes: > > CFLAGS_SL: -fpic > ^^^^ > The shared library must be compiled with `-fPIC', and the static version > must not be. In other words, each `*.c' file is compiled twice. Normaly yes. But I didn't see this in any PostgreSQL makefile. I think using -fPIC still creates a working static library. It does generate less efficient code though. > Take a look at the debian policy manual :-)). :-) > Here is the patch against the `ecpg/lib/Makefile.in'. Applied to my source. I think we should add a similar patch to libpq/Makefile and whatever else creates shared libs. Michael -- Dr. Michael Meskes, Project-Manager | topsystem Systemhaus GmbH meskes@topsystem.de | Europark A2, Adenauerstr. 20 meskes@debian.org | 52146 Wuerselen Go SF49ers! Go Rhein Fire! | Tel: (+49) 2405/4670-44 Use Debian GNU/Linux! | Fax: (+49) 2405/4670-10