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Re: Linking in C++ mode

From: Earnie Boyd
Subject: Re: Linking in C++ mode
Date: Sun, 10 Nov 2002 06:01:45 -0500
User-agent: Mozilla/5.0 (Windows; U; WinNT4.0; en-US; rv:1.1) Gecko/20020826

John Levon wrote:
We have a C program which links to a C++ library, and we need to
tell automake to do the link in C++ mode  to avoid undefined references
to the C++ standard library. How can we do it ?

The looks as follows :

dist_sources = oprofiled.c opd_stats.c opd_kernel.c opd_image.c 
opd_sample_files.c \
        opd_image.h opd_printf.h opd_stats.h opd_kernel.h opd_sample_files.h 
EXTRA_DIST = $(dist_sources) if kernel_support AM_CPPFLAGS=-I ${top_srcdir}/libabi -I ${top_srcdir}/libutil -I ${top_srcdir}/libop -I ${top_srcdir}/libdb bin_PROGRAMS = oprofiled oprofiled_SOURCES = $(dist_sources) if enable_abi
oprofiled_LDADD = ../libabi/libabi.a ../libdb/libdb.a ../libop/libop.a 
oprofiled_LDADD = ../libdb/libdb.a ../libop/libop.a ../libutil/libutil.a

libabi is the C++ library. It would be good to have a solution that
works for automake 1.5 upwards ...

You could always just add -lstdc++ to the oprofiled_LDADD variable.

(also, what is the "preferred" way to add a C/C++ flag from

--[disable|enable]-c++ :) I'd have to do research and don't know off the top of my head. Perhaps the autoconf manual would be of help.


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