[Buildroot] [PATCH] package/libnss: fix build failure on arm32 arch not armv7

[Giulio Benetti <giulio.benetti@benettiengineering.com>]

Forgot to mention, patch is pending upstream:
https://bugzilla.mozilla.org/show_bug.cgi?id=1624864

On 3/25/20 3:31 PM, Giulio Benetti wrote:
> NSS assumes that every arm32 build is an armv7, but this is not, so
> let's add a patch to remove -march=armv7 flag.
> 
> Fixes:
> http://autobuild.buildroot.net/results/464/464044fda2850123339de6c8071374e380636ee0/
> 
> Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
> ---
>   ...w-build-gcm-arm32-neon-on-march-armv.patch | 28 +++++++++++++++++++
>   1 file changed, 28 insertions(+)
>   create mode 100644 package/libnss/0002-Bug-1624864-Allow-build-gcm-arm32-neon-on-march-armv.patch
> 
> diff --git a/package/libnss/0002-Bug-1624864-Allow-build-gcm-arm32-neon-on-march-armv.patch b/package/libnss/0002-Bug-1624864-Allow-build-gcm-arm32-neon-on-march-armv.patch
> new file mode 100644
> index 0000000000..f23a067833
> --- /dev/null
> +++ b/package/libnss/0002-Bug-1624864-Allow-build-gcm-arm32-neon-on-march-armv.patch
> @@ -0,0 +1,28 @@
> +From 345503215135466a0008ef1b7546b65e5705d0df Mon Sep 17 00:00:00 2001
> +From: Giulio Benetti <giulio.benetti@benettiengineering.com>
> +Date: Wed, 25 Mar 2020 15:02:20 +0100
> +Subject: [PATCH] Bug 1624864 - Allow build gcm-arm32-neon on -march != armv7
> +
> +Don't assume every arm32 support armv7 instruction set.
> +
> +Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
> +---
> + nss/lib/freebl/Makefile | 2 +-
> + 1 file changed, 1 insertion(+), 1 deletion(-)
> +
> +diff --git a/nss/lib/freebl/Makefile b/nss/lib/freebl/Makefile
> +index dc502f309..c7eb9c205 100644
> +--- a/nss/lib/freebl/Makefile
> ++++ b/nss/lib/freebl/Makefile
> +@@ -781,7 +781,7 @@ ifeq ($(CPU_ARCH),arm)
> + USES_SOFTFLOAT_ABI := $(shell $(CC) -o - -E -dM - $(CFLAGS) < /dev/null | grep __SOFTFP__ > /dev/null && echo 1)
> + $(OBJDIR)/$(PROG_PREFIX)aes-armv8$(OBJ_SUFFIX): CFLAGS += -march=armv8-a -mfpu=crypto-neon-fp-armv8$(if $(USES_SOFTFLOAT_ABI), -mfloat-abi=softfp)
> + ifndef NSS_DISABLE_GCM_ARM32_NEON
> +-$(OBJDIR)/$(PROG_PREFIX)gcm-arm32-neon$(OBJ_SUFFIX): CFLAGS += -march=armv7 -mfpu=neon$(if $(USES_SOFTFLOAT_ABI), -mfloat-abi=softfp)
> ++$(OBJDIR)/$(PROG_PREFIX)gcm-arm32-neon$(OBJ_SUFFIX): CFLAGS += -mfpu=neon$(if $(USES_SOFTFLOAT_ABI), -mfloat-abi=softfp)
> + endif
> + endif
> + ifeq ($(CPU_ARCH),aarch64)
> +--
> +2.20.1
> +
> 

-- 
Giulio Benetti
Benetti Engineering sas