Date: Thu, 25 Apr 2002 19:51:16 +0200 From: Miguel Mendez <flynn@energyhq.homeip.net> To: Mike Meyer <mwm-dated-1020187662.12a903@mired.org> Cc: Edwin Groothuis <edwin@mavetju.org>, freebsd-hackers@freebsd.org Subject: Re: missing libraries, and how to find them. Message-ID: <20020425195116.A80026@energyhq.homeip.net> In-Reply-To: <15560.15502.213147.169455@guru.mired.org>; from mwm-dated-1020187662.12a903@mired.org on Thu, Apr 25, 2002 at 12:27:42PM -0500 References: <20020425210202.A49377@k7.mavetju.org> <20020425140244.A77165@energyhq.homeip.net> <15560.15502.213147.169455@guru.mired.org>
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On Thu, Apr 25, 2002 at 12:27:42PM -0500, Mike Meyer wrote:
Hi,
> As I stated just a minute ago, my version of that was committed a
> while ago, and will hopefully be MFC's soon.
Good, I didn't know someone else had already submitted a patch before.
> But your script doesn't do the same thing. It only tells you what
> libraries the libraries your command includes. It doesn't go to the
> third third - or further - levels if required.
Well, not exactly. When you link program a with lib b, and lib b depends
on lib c, ldd a shows both libs, so my script works as it will ldd all
libs:
Let's see:
flynn@kajsa# echo "void foo() { bar(); }" > foo.c
flynn@kajsa# echo "void bar() { baz(); }" > baz.c
flynn@kajsa# echo "void baz() { }" >=20
flynn@kajsa# echo "void bar() { baz(); }" > bar.c
flynn@kajsa# echo "void baz() { }" > baz.c
flynn@kajsa# cc -o libbaz.so -shared baz.c
flynn@kajsa# cc -o libbar.so -L/tmp/foo -lbaz -shared bar.c
flynn@kajsa# cc -o libfoo.so -L/tmp/foo -lbar -shared foo.c
flynn@kajsa# echo "int main() { foo(); }" > main.c
flynn@kajsa# cc -o main main.c -L/tmp/foo -lfoo
flynn@kajsa# ldd main
main:
libfoo.so =3D> /tmp/foo/libfoo.so (0x28068000)
libc.so.5 =3D> /usr/lib/libc.so.5 (0x2806a000)
libbar.so =3D> /tmp/foo/libbar.so (0x2811d000)
libbaz.so =3D> /tmp/foo/libbaz.so (0x2811f000)
=09
QED :-)
Cheers,
--=20
Miguel Mendez - flynn@energyhq.homeip.net
GPG Public Key :: http://energyhq.homeip.net/files/pubkey.txt
EnergyHQ :: http://www.energyhq.tk
FreeBSD - The power to serve!
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