# -*- shell-script -*-
-# Copyright (C) 2012-2016 Free Software Foundation, Inc.
+# Copyright (C) 2012-2019 Free Software Foundation, Inc.
# Contributed by Richard Henderson <rth@redhat.com>.
#
# This file is part of the GNU Atomic Library (libatomic).
# Map the target cpu to an ARCH sub-directory. At the same time,
# work out any special compilation flags as necessary.
+# Give operating systems the opportunity to discard XCFLAGS modifications based
+# on ${target_cpu}. For example to allow proper use of multilibs.
+configure_tgt_pre_target_cpu_XCFLAGS="${XCFLAGS}"
+
case "${target_cpu}" in
alpha*)
# fenv.c needs this option to generate inexact exceptions.
ARCH=alpha
;;
rs6000 | powerpc*) ARCH=powerpc ;;
+ riscv*) ARCH=riscv ;;
sh*) ARCH=sh ;;
+ aarch64*)
+ ARCH=aarch64
+ case "${target}" in
+ aarch64*-*-linux*)
+ if test -n "$enable_aarch64_lse"; then
+ try_ifunc=yes
+ fi
+ ;;
+ esac
+ ;;
arm*)
ARCH=arm
case "${target}" in
# Other system configury
case "${target}" in
+ aarch64*-*-linux*)
+ # OS support for atomic primitives.
+ config_path="${config_path} linux/aarch64 posix"
+ ;;
+
arm*-*-linux*)
# OS support for atomic primitives.
config_path="${config_path} linux/arm posix"
;;
+ s390*-*-linux*)
+ # OS support for atomic primitives.
+ config_path="${config_path} s390 posix"
+ ;;
+
*-*-linux* | *-*-gnu* | *-*-k*bsd*-gnu \
| *-*-netbsd* | *-*-freebsd* | *-*-openbsd* | *-*-dragonfly* \
| *-*-solaris2* | *-*-sysv4* | *-*-irix6* | *-*-osf* | *-*-hpux11* \
;;
esac
;;
+
+ *-*-rtems*)
+ XCFLAGS="${configure_tgt_pre_target_cpu_XCFLAGS}"
+ config_path="rtems"
+ ;;
+
*-*-elf*)
# ??? No target OS. We could be targeting bare-metal kernel-mode,
# or user-mode for some custom OS. If the target supports TAS,
UNSUPPORTED=1
;;
esac
+
+# glibc will pass hwcap to ifunc resolver functions as an argument.
+# The type may be different on different architectures.
+case "${target}" in
+ aarch64*-*-*)
+ IFUNC_RESOLVER_ARGS="uint64_t hwcap"
+ ;;
+ *)
+ IFUNC_RESOLVER_ARGS="void"
+ ;;
+esac