[Buildroot] [PATCH] package/libnss: fix build failure on Aarch64 host for powerpc64 target

[Yann E. MORIN]

Giulio, All,

On 2022-05-25 00:07 +0200, Giulio Benetti spake thusly:
> When building on Aarch64 host for powerpc64 we get this error:
> gcc: error: unrecognized command-line option '-m64'
> 
> This happens because we don't have the flexibility to override the LDFLAGS
> when linking nsinstall host tool that is built in libnss. Also libnss uses
> the same LDFLAGS it uses for target and that is not correct.
> So let's add a patch to add NATIVE_LDFLAGS variable to override LFDFLAGS
> when building nsinstall utility and set it to HOST_LDFLAGS in libnss.mk
> 
> Fixes:
> http://autobuild.buildroot.net/results/67500395f19aa698b98404cde8d20463e55504bf/
> 
> Signed-off-by: Giulio Benetti <giulio.benetti at benettiengineering.com>
> ---
> Patch is pending upstream:
> https://bugzilla.mozilla.org/show_bug.cgi?id=1771036

We need that information in the patch itself, so that we handily have it
where we need it when we bump the version and can check whether the
patch still makes sense or not.

Applied to master, thanks.

(And upstream seemed to be happy with the patch, even if it has not yet
been applied.)

Regards,
Yann E. MORIN.

> ---
>  ...36-Fix-build-failure-on-Aarch64-host.patch | 36 +++++++++++++++++++
>  package/libnss/libnss.mk                      |  4 ++-
>  2 files changed, 39 insertions(+), 1 deletion(-)
>  create mode 100644 package/libnss/0001-Bug-1771036-Fix-build-failure-on-Aarch64-host.patch
> 
> diff --git a/package/libnss/0001-Bug-1771036-Fix-build-failure-on-Aarch64-host.patch b/package/libnss/0001-Bug-1771036-Fix-build-failure-on-Aarch64-host.patch
> new file mode 100644
> index 0000000000..2ca373cd21
> --- /dev/null
> +++ b/package/libnss/0001-Bug-1771036-Fix-build-failure-on-Aarch64-host.patch
> @@ -0,0 +1,36 @@
> +From 9d5900c1ee9000906a90923e861b0fd7f1061cde Mon Sep 17 00:00:00 2001
> +From: Giulio Benetti <giulio.benetti at benettiengineering.com>
> +Date: Tue, 24 May 2022 23:40:45 +0200
> +Subject: [PATCH] Bug 1771036 - Fix build failure on Aarch64 host
> +
> +If trying to build on Aarch64 host for powerpc64 target we can't override
> +the LDFLAGS leading to this build failure:
> +gcc: error: unrecognized command-line option '-m64'
> +
> +So let's add NATIVE_LDFLAGS check and use it to link nsinstall. This way
> +any build environment can pass LDFLAGS that fits better for host
> +architecture.
> +
> +Signed-off-by: Giulio Benetti <giulio.benetti at benettiengineering.com>
> +---
> + coreconf/nsinstall/Makefile | 4 ++++
> + 1 file changed, 4 insertions(+)
> +
> +diff --git a/nss/coreconf/nsinstall/Makefile b/nss/coreconf/nsinstall/Makefile
> +index 08dfbc2fe..5061789ff 100644
> +--- a/nss/coreconf/nsinstall/Makefile
> ++++ b/nss/coreconf/nsinstall/Makefile
> +@@ -34,6 +34,10 @@ ifdef NATIVE_FLAGS
> + OS_CFLAGS=$(NATIVE_FLAGS)
> + endif
> + 
> ++ifdef NATIVE_LDFLAGS
> ++LDFLAGS=$(NATIVE_LDFLAGS)
> ++endif
> ++
> + include $(DEPTH)/coreconf/rules.mk
> + 
> + # Redefine MAKE_OBJDIR for just this directory
> +-- 
> +2.34.1
> +
> diff --git a/package/libnss/libnss.mk b/package/libnss/libnss.mk
> index 540092dfcf..0d0f1d84b9 100644
> --- a/package/libnss/libnss.mk
> +++ b/package/libnss/libnss.mk
> @@ -92,7 +92,9 @@ define LIBNSS_BUILD_CMDS
>  		SOURCE_MD_DIR=$(@D)/$(LIBNSS_DISTDIR) \
>  		DIST=$(@D)/$(LIBNSS_DISTDIR) \
>  		CHECKLOC= \
> -		$(LIBNSS_BUILD_VARS) NATIVE_FLAGS="$(HOST_CFLAGS) -DLINUX"
> +		$(LIBNSS_BUILD_VARS) \
> +		NATIVE_FLAGS="$(HOST_CFLAGS) -DLINUX" \
> +		NATIVE_LDFLAGS="$(HOST_LDFLAGS)"
>  endef
>  
>  define LIBNSS_INSTALL_STAGING_CMDS
> -- 
> 2.34.1
> 
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