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57 lines
2.1 KiB
Plaintext
57 lines
2.1 KiB
Plaintext
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dnl The libpthread.so library
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dnl
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dnl Copyright (C) 2016 Red Hat, Inc.
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dnl
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dnl This library is free software; you can redistribute it and/or
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dnl modify it under the terms of the GNU Lesser General Public
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dnl License as published by the Free Software Foundation; either
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dnl version 2.1 of the License, or (at your option) any later version.
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dnl
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dnl This library is distributed in the hope that it will be useful,
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dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
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dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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dnl Lesser General Public License for more details.
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dnl
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dnl You should have received a copy of the GNU Lesser General Public
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dnl License along with this library. If not, see
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dnl <http://www.gnu.org/licenses/>.
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dnl
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AC_DEFUN([LIBVIRT_CHECK_PTHREAD], [
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old_LIBS="$LIBS"
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dnl Availability of pthread functions. Because of $LIB_PTHREAD, we
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dnl cannot use AC_CHECK_FUNCS_ONCE. LIB_PTHREAD and LIBMULTITHREAD
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dnl were set during gl_INIT by gnulib.
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LIBS="$LIBS $LIB_PTHREAD $LIBMULTITHREAD"
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pthread_found=yes
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AC_CHECK_FUNCS([pthread_mutexattr_init])
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AC_CHECK_HEADER([pthread.h],,[pthread_found=no])
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if test "$ac_cv_func_pthread_mutexattr_init:$pthread_found" != "yes:yes"
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then
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AC_MSG_ERROR([A pthreads impl is required for building libvirt])
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fi
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dnl At least mingw64-winpthreads #defines pthread_sigmask to 0,
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dnl which in turn causes compilation to complain about unused variables.
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dnl Expose this broken implementation, so we can work around it.
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AC_CACHE_CHECK([whether pthread_sigmask does anything],
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[lv_cv_pthread_sigmask_works],
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[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
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#include <sys/types.h>
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#include <signal.h>
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]], [[
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#ifdef pthread_sigmask
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int (*foo)(int, const sigset_t *, sigset_t *) = &pthread_sigmask;
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return !foo;
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#endif
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]])], [lv_cv_pthread_sigmask_works=yes], [lv_cv_pthread_sigmask_works=no])])
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if test "x$lv_cv_pthread_sigmask_works" != xyes; then
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AC_DEFINE([FUNC_PTHREAD_SIGMASK_BROKEN], [1],
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[Define to 1 if pthread_sigmask is not a real function])
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fi
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LIBS="$old_LIBS"
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])
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