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dnl am-enable-threads.m4 by Miroslav Zagorac <mzagorac@haproxy.com>
dnl
AC_DEFUN([AX_ENABLE_THREADS], [
AC_ARG_ENABLE([threads],
[AS_HELP_STRING([--enable-threads], [enable threads @<:@default=yes@:>@])],
[enable_threads="${enableval}"],
[enable_threads=yes]
)
if test "${enable_threads}" != "no"; then
HAVE_THREADS=
THREADS_CFLAGS=
THREADS_CPPFLAGS=
THREADS_LDFLAGS=
THREADS_LIBS=
AX_VARIABLES_STORE
LDFLAGS="${LDFLAGS} ${THREADS_LDFLAGS}"
CPPFLAGS="${CPPFLAGS} ${THREADS_CPPFLAGS}"
AC_CHECK_LIB([pthread], [pthread_create], [], [AC_MSG_ERROR([THREADS library not found])])
AC_CHECK_HEADER([pthread.h], [], [AC_MSG_ERROR([THREADS library headers not found])])
HAVE_THREADS=yes
THREADS_LIBS="-lpthread"
AC_DEFINE([USE_THREADS], [1], [Define to 1 for multi-thread support.])
AC_DEFINE([_REENTRANT], [1], [Define to 1 for multi-thread support.])
AX_VARIABLES_RESTORE
AC_MSG_NOTICE([THREADS environment variables:])
AC_MSG_NOTICE([ THREADS_CFLAGS=${THREADS_CFLAGS}])
AC_MSG_NOTICE([ THREADS_CPPFLAGS=${THREADS_CPPFLAGS}])
AC_MSG_NOTICE([ THREADS_LDFLAGS=${THREADS_LDFLAGS}])
AC_MSG_NOTICE([ THREADS_LIBS=${THREADS_LIBS}])
AC_SUBST([THREADS_CFLAGS])
AC_SUBST([THREADS_CPPFLAGS])
AC_SUBST([THREADS_LDFLAGS])
AC_SUBST([THREADS_LIBS])
fi
])
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