dash/build-aux/m4/ax_boost_thread.m4
fanquake 68f8cbf043 Merge #17396: build: modest Android improvements
366913e307d2dc13bc00d6bf7b6b2426c359ac30 build: AX_BOOST_THREAD serial 33 (Igor Cota)
cf0681133ae7301ead7091eaee55c945da5cdfcc build: disable D-Bus on Android by default (Igor Cota)

Pull request description:

  I've been trying to build for Android on different OSes/Gitian with varying success. Build system is quite the beast and sometimes it doesn't get it right. To make sure it does these three little tweaks make the Android build more robust:

  - disable D-Bus (Android doesn't support it and has its own way to trigger notifications)
  - don't flag `-lpthread` when linking Boost, [Bionic has built-in support](https://stackoverflow.com/questions/30801752/android-ndk-and-pthread)
  - ~~add `-static-libstdc++` to linker flags. This avoids having to bundle `libc++_shared` with CLI apps, still necessary with `bitcoin-qt` though (thanks Sjors)~~

  I think these are small and fairly straightforward so I put them all into this one PR.

ACKs for top commit:
  fanquake:
    ACK 366913e307d2dc13bc00d6bf7b6b2426c359ac30

Tree-SHA512: 31465fd228a5877c20aa2a05f98242d4eeb328b9b35bd1a7a3dcfb1ef51379d84053a81ade5a65436ffc1bc8ccd21f11ed0539eb10e827d182c0c04394629af0
2021-07-15 19:30:07 -05:00

188 lines
6.2 KiB
Plaintext

# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_boost_thread.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_BOOST_THREAD
#
# DESCRIPTION
#
# Test for Thread library from the Boost C++ libraries. The macro requires
# a preceding call to AX_BOOST_BASE. Further documentation is available at
# <http://randspringer.de/boost/index.html>.
#
# This macro calls:
#
# AC_SUBST(BOOST_THREAD_LIB)
#
# And sets:
#
# HAVE_BOOST_THREAD
#
# LICENSE
#
# Copyright (c) 2009 Thomas Porschberg <thomas@randspringer.de>
# Copyright (c) 2009 Michael Tindal
#
# Copying and distribution of this file, with or without modification, are
# permitted in any medium without royalty provided the copyright notice
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 33
AC_DEFUN([AX_BOOST_THREAD],
[
AC_ARG_WITH([boost-thread],
AS_HELP_STRING([--with-boost-thread@<:@=special-lib@:>@],
[use the Thread library from boost -
it is possible to specify a certain library for the linker
e.g. --with-boost-thread=boost_thread-gcc-mt ]),
[
if test "$withval" = "yes"; then
want_boost="yes"
ax_boost_user_thread_lib=""
else
want_boost="yes"
ax_boost_user_thread_lib="$withval"
fi
],
[want_boost="yes"]
)
if test "x$want_boost" = "xyes"; then
AC_REQUIRE([AC_PROG_CC])
AC_REQUIRE([AC_CANONICAL_BUILD])
CPPFLAGS_SAVED="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
export CPPFLAGS
LDFLAGS_SAVED="$LDFLAGS"
LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"
export LDFLAGS
AC_CACHE_CHECK(whether the Boost::Thread library is available,
ax_cv_boost_thread,
[AC_LANG_PUSH([C++])
CXXFLAGS_SAVE=$CXXFLAGS
case "x$host_os" in
xsolaris )
CXXFLAGS="-pthreads $CXXFLAGS"
break;
;;
xmingw32 )
CXXFLAGS="-mthreads $CXXFLAGS"
break;
;;
*android* )
break;
;;
* )
CXXFLAGS="-pthread $CXXFLAGS"
break;
;;
esac
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM(
[[@%:@include <boost/thread/thread.hpp>]],
[[boost::thread_group thrds;
return 0;]])],
ax_cv_boost_thread=yes, ax_cv_boost_thread=no)
CXXFLAGS=$CXXFLAGS_SAVE
AC_LANG_POP([C++])
])
if test "x$ax_cv_boost_thread" = "xyes"; then
case "x$host_os" in
xsolaris )
BOOST_CPPFLAGS="-pthreads $BOOST_CPPFLAGS"
break;
;;
xmingw32 )
BOOST_CPPFLAGS="-mthreads $BOOST_CPPFLAGS"
break;
;;
*android* )
break;
;;
* )
BOOST_CPPFLAGS="-pthread $BOOST_CPPFLAGS"
break;
;;
esac
AC_SUBST(BOOST_CPPFLAGS)
AC_DEFINE(HAVE_BOOST_THREAD,,
[define if the Boost::Thread library is available])
BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`
LDFLAGS_SAVE=$LDFLAGS
case "x$host_os" in
*bsd* )
LDFLAGS="-pthread $LDFLAGS"
break;
;;
esac
if test "x$ax_boost_user_thread_lib" = "x"; then
for libextension in `ls -r $BOOSTLIBDIR/libboost_thread* 2>/dev/null | sed 's,.*/lib,,' | sed 's,\..*,,'`; do
ax_lib=${libextension}
AC_CHECK_LIB($ax_lib, exit,
[link_thread="yes"; break],
[link_thread="no"])
done
if test "x$link_thread" != "xyes"; then
for libextension in `ls -r $BOOSTLIBDIR/boost_thread* 2>/dev/null | sed 's,.*/,,' | sed 's,\..*,,'`; do
ax_lib=${libextension}
AC_CHECK_LIB($ax_lib, exit,
[link_thread="yes"; break],
[link_thread="no"])
done
fi
else
for ax_lib in $ax_boost_user_thread_lib boost_thread-$ax_boost_user_thread_lib; do
AC_CHECK_LIB($ax_lib, exit,
[link_thread="yes"; break],
[link_thread="no"])
done
fi
if test "x$ax_lib" = "x"; then
AC_MSG_ERROR(Could not find a version of the Boost::Thread library!)
fi
if test "x$link_thread" = "xno"; then
AC_MSG_ERROR(Could not link against $ax_lib !)
else
BOOST_THREAD_LIB="-l$ax_lib"
case "x$host_os" in
*bsd* )
BOOST_LDFLAGS="-pthread $BOOST_LDFLAGS"
break;
;;
xsolaris )
BOOST_THREAD_LIB="$BOOST_THREAD_LIB -lpthread"
break;
;;
xmingw32 )
break;
;;
*android* )
break;
;;
* )
BOOST_THREAD_LIB="$BOOST_THREAD_LIB -lpthread"
break;
;;
esac
AC_SUBST(BOOST_THREAD_LIB)
fi
fi
CPPFLAGS="$CPPFLAGS_SAVED"
LDFLAGS="$LDFLAGS_SAVED"
fi
])