Date: Thu, 25 Apr 1996 16:07:59 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: hoppy@appsmiths.com (Hoppy) Cc: freebsd-questions@freebsd.org Subject: Re: recipe for shared libraries? Message-ID: <199604252307.QAA25747@phaeton.artisoft.com> In-Reply-To: <Pine.BSF.3.91.960425135956.8982B-100000@anvil.appsmiths.com> from "Hoppy" at Apr 25, 96 02:03:12 pm
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> I'm trying to construct a shared library using g++, but I apparently don't
> have the whole dance quite right.
>
> I end up with 'ld.so failed'
>
> I'm compiling with 'g++ -fpic ...', linking with 'ld -Bshareable' and
> getting a *.so.2.1 file, which I place somewhere where ldconfig
> discovers it at boot (ldconfig -r reports it).
>
> How can I further troubleshoot this.
1) You *must* use BSD makefiles, or you *must* explicitly
link with c++rt0.o.
2) If you use BSD makefiles, you can do something like:
== Makefile: BEGIN ==========================================================
# Library to create (xxx = make libxxx.s0.MMM.mmm
#
LIB = xxx
# Major version number (MMM in comment, above)
#
SHLIB_MAJOR= 3
# Minor version number (mmm in comment, above)
#
SHLIB_MINOR= 0
# Needed if you are makeing a c++ library (constructors, destructors, etc.)
#
CPLUSPLUSLIB=YES
# List of source files
#
SRCS = mysource.c
# Additions to CFLAGS. These one say "include local headers as if they
# were system headers and whine about what might just be grammatical
# or style differences between me and the authors of GCC"
#
CFLAGS += -I. -I${.CURDIR} -Wall -ansi -pedantic
# define if you need to use libraries with this library; like the lex lib
#
# LDFLAGS += -ll
# define if you need to remove generated source (yacc, lex, etc)
#
# CLEANFILES+= lex.c parser.c y.tab.h
# Define this target for things to do before doing the default library
# installation rules; in this example, we have header files that go
# with the library that we want to be installed so the library is usable;
# if they aren't there, we don't want to install the library (there's
# also "afterinstall", etc... see /usr/share/mk/bsd.README and the
# "man make" page).
#
# beforeinstall:
# @(cd ${.CURDIR}; cmp -s forms.h ${DESTDIR}/usr/include/forms.h || \
# install -c -o ${BINOWN} -g ${BINGRP} -m 444 forms.h \
# ${DESTDIR}/usr/include/forms.h;)
# Must do this to get the BSD specific rules for libraries.
#
.include <bsd.lib.mk>
== Makefile: END ============================================================
3) If you don't use BSD makefiles
You should be shot. 8-).
Terry Lambert
terry@lambert.org
---
Any opinions in this posting are my own and not those of my present
or previous employers.
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