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From: Peter Korsgaard <peter@korsgaard.com>
To: buildroot@busybox.net
Subject: [Buildroot] [PATCH 2/2] package/sconeserver: needs shared libs or non uClibc toolchain
Date: Mon, 29 Aug 2016 00:09:41 +0200	[thread overview]
Message-ID: <87wpj07dga.fsf@dell.be.48ers.dk> (raw)
In-Reply-To: <1472408394-20573-2-git-send-email-yann.morin.1998@free.fr> (Yann E. MORIN's message of "Sun, 28 Aug 2016 20:19:54 +0200")

>>>>> "Yann" == Yann E MORIN <yann.morin.1998@free.fr> writes:

 > sconeserver wants to use dlopen(), unconditionally: it does not try to
 > detect it, and it can't work without it (the code is not conditional).

 > So, when the toolchain uses uClibc, and that uClibc has been configured
 > with only static support, the dlopen() functions are not available at
 > all, and the corresponding headers are not present:

 >     ModuleLoader.cpp:29:19: fatal error: dlfcn.h: No such file or directory
 >      #include <dlfcn.h>
 >                        ^

 > However, we can't know if uClibc has shared support or is static-only,
 > especially for external toolchains.

 > The only way is to forbid the combination {uClibc,static}. So we may
 > indeed forbid working combinations, for example if the external
 > toolchain is uClibc-based and has support for shared libs...

Ehh, this I don't get. Why not simply depend on !BR2_STATIC_LIBS like we
do for other users of dlfcn.h?

If BR2_STATIC_LIBS is enabled then there won't be any .so files in the
target rootfs, so even if the C library has dlopen support it won't
work.

If an external (uClibc-based) toolchain has no shared library support
then it can only be used in BR2_STATIC_LIBS configurations.

-- 
Bye, Peter Korsgaard

  reply	other threads:[~2016-08-28 22:09 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-28 18:19 [Buildroot] [PATCH 1/2] package/sconeserver: needs host-pkgconf Yann E. MORIN
2016-08-28 18:19 ` [Buildroot] [PATCH 2/2] package/sconeserver: needs shared libs or non uClibc toolchain Yann E. MORIN
2016-08-28 22:09   ` Peter Korsgaard [this message]
2016-08-28 22:15     ` Yann E. MORIN
2016-08-29  7:03       ` Peter Korsgaard
2016-08-28 22:20   ` Matthew Weber
2016-08-28 22:05 ` [Buildroot] [PATCH 1/2] package/sconeserver: needs host-pkgconf Peter Korsgaard

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