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-Wl,--push-state,--no-as-needed,-lc,--pop-state forces libc back into
DT_NEEDED for libraries that reach it only through libhttrack: the
libhtsjava JNI wrapper and the libtest callback examples. The flag is
GNU-ld-specific; Apple's ld rejects it ("ld: unknown options:
--push-state --no-as-needed --pop-state"), breaking the macOS build, and
doesn't need it (every dylib links libSystem anyway).
Probe it once with AX_CHECK_LINK_FLAG and emit it via LIBC_FORCE_LINK
only where the linker accepts it. On GNU/Linux the flag is still applied
and libc.so.6 stays in DT_NEEDED, so behavior is unchanged there.
Signed-off-by: Xavier Roche <roche@httrack.com>
HTTrack library example
-----------------------
Here is an example of how to integrate HTTrack Website Copier into a project
to use it as a "core library".
Important Notice:
----------------
These sources are covered by the GNU General Public License (see below)
(Projects based on these sources must follow the GPL, too)
Copyright notice:
----------------
HTTrack Website Copier, Offline Browser for Windows and Unix
Copyright (C) Xavier Roche and other contributors
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
========================================================================
MAKEFILE PROJECT : libtest Project Overview
========================================================================
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/////////////////////////////////////////////////////////////////////////////