Date: Tue, 05 Jul 2016 13:45:13 +0200 From: Pietro Cerutti <gahr@FreeBSD.org> To: Willem Jan Withagen <wjw@digiware.nl> Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org>, owner-freebsd-hackers@freebsd.org Subject: Re: Problem during dlopen() Message-ID: <416028b6b2a1dffe4e010b5792c56100@gahr.ch> In-Reply-To: <5e29e535-f91f-35fb-2a7e-324bb19b658f@digiware.nl> References: <5e29e535-f91f-35fb-2a7e-324bb19b658f@digiware.nl>
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On 2016-07-05 13:13, Willem Jan Withagen wrote: > Hi, > > I'm banging my head agains the wall because I cannot seem to get this > working. > > The problem is due to changing from automake to cmake building. > > But all my dlopens start failing with something like: > load failed dlopen(build/lib/compressor/libceph_snappy.so) or > dlopen(build/lib/libceph_snappy.so): build/lib/libceph_snappy.so: > Undefined symbol "_ZN4ceph6buffer4list8iterator7advanceEl" > > If do a lookup for the name: > nm build/lib/libceph_snappy.so |grep > ceph6buffer4list8iterator7advanceEl > > if give me: > U _ZN4ceph6buffer4list8iterator7advanceEl > > The parent/calling executable however has: > 0000000000513de0 T _ZN4ceph6buffer4list8iterator7advanceEl > > Clearly dlopen is not able to match these 2 and succeed. > > Question: > So on which part of the building is what switch missing. Wild guess: -Wl,-E linking the executable. -- Pietro Cerutti gahr@FreeBSD.org PGP Public Key: http://gahr.ch/pgp
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