From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alexey Brodkin Date: Wed, 19 Apr 2017 20:48:57 +0300 Subject: [Buildroot] [PATCH] uclibc: arc: Disable usage of atomic ops if hardware has no LLSC Message-ID: <20170419174857.23185-1-abrodkin@synopsys.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: buildroot@busybox.net Since uClibc-ng v1.0.20 we may force libc to either use llock/scond instructions for atomic ops or if those are missing use kernel-assisted emulation. By defult atomics are used so we disable that feature in libc if we build for target without LLSC. This allows us to build and use NPTL on ARC750 for example which was not possible before. Signed-off-by: Alexey Brodkin Cc: Thomas Petazzoni Cc: Peter Korsgaard --- package/uclibc/uclibc.mk | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/package/uclibc/uclibc.mk b/package/uclibc/uclibc.mk index 45bb6dede..ce7f23f25 100644 --- a/package/uclibc/uclibc.mk +++ b/package/uclibc/uclibc.mk @@ -101,6 +101,12 @@ define UCLIBC_ARC_PAGE_SIZE_CONFIG $(call KCONFIG_ENABLE_OPT,$(UCLIBC_ARC_PAGE_SIZE),$(@D)/.config) endef +ifneq ($(BR2_ARC_ATOMIC_EXT),y) +define UCLIBC_ARC_ATOMICS_CONFIG + $(call KCONFIG_DISABLE_OPT,CONFIG_ARC_HAS_ATOMICS,$(@D)/.config) +endef +endif + endif # arc # @@ -395,6 +401,7 @@ define UCLIBC_KCONFIG_FIXUP_CMDS $(UCLIBC_BINFMT_CONFIG) $(UCLIBC_ARC_TYPE_CONFIG) $(UCLIBC_ARC_PAGE_SIZE_CONFIG) + $(UCLIBC_ARC_ATOMICS_CONFIG) $(UCLIBC_ARM_ABI_CONFIG) $(UCLIBC_ARM_BINFMT_FLAT) $(UCLIBC_ARM_NO_CONTEXT_FUNCS) -- 2.11.0