[Buildroot] [PATCH] package/nmap: fix shared-only build
Peter Korsgaard
peter at korsgaard.com
Sun Dec 14 16:55:35 UTC 2014
>>>>> "Yann" == Yann E MORIN <yann.morin.1998 at free.fr> writes:
> Changeset f1d3e09 (Build shared libraries only as the default) broke the
> nmap package.
> nmap builds an internal version of libdnet, and tries to statically link
> against it. Of course, this breaks for shared-only builds, since in that
> case there is no static lib ever built.
> Using an external libdnet is not really an option:
> - libdnet comes from dnprogs, from the linux-decnet project;
> unfortunately, their build-system is not ammenable to
> cross-compilation, and is a real pain to deal with;
> - nmap's bundled libdnet is anyway heavily modified, which precludes
> using an external libdnet.
> Fix that by considering libdnet to be a purely internal library, and by
> configuring it with --enable-static, always.
> nmap's ./configure uses AC_CONFIG_SUBDIRS() to configure the libdnet
> sub-directory; AC_CONFIG_SUBDIRS() calls ./configure in all the
> sub-directories it is passed as arguments. Unfortunately, it is not
> possible to specify extra ./configure arguments whith AC_CONFIG_SUBDIRS.
> We are using an autoconf trick, which is, when configuring
> sub-directories with AC_CONFIG_SUBDIRS(), it will first try to execute
> configure.gnu if it exists, before it fallbacks to running plain
> configure. See:
> https://www.gnu.org/software/autoconf/manual/autoconf.html#Subdirectories
> So, we provide a configure.gnu that is just a wrapper around the real
> configure, which sole purpose is to append --enable-static when calling
> the real configure.
> Note1: since this libdnet is considered a purely internal library, we
> also always pass --disable-shared, since it is not needed at all.
> Note2: since this libdnet is considered a purely internal library, it
> should not be exposed to other packages, and thus nmap does not install
> it, neither in target nor in staging, neither static nor shared, which
> is what we want.
> Signed-off-by: "Yann E. MORIN" <yann.morin.1998 at free.fr>
> Cc: Romain Naour <romain.naour at openwide.fr>
> ---
> package/nmap/0001-libdnet-wrapper-configure.patch | 11 +++++++++++
> package/nmap/nmap.mk | 5 +++++
> 2 files changed, 16 insertions(+)
> create mode 100644 package/nmap/0001-libdnet-wrapper-configure.patch
> +++ b/package/nmap/nmap.mk
> @@ -14,6 +14,11 @@ NMAP_CONF_OPTS = --without-liblua --without-zenmap \
> NMAP_LICENSE = GPLv2
> NMAP_LICENSE_FILES = COPYING
I added a comment explaining why we're doing this. It would be nice if
patch / apply-patches.sh would learn the git permissions / rename
handling extensions.
Committed with this and the typo pointed out by Romain fixed, thanks.
--
Bye, Peter Korsgaard
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