Fix powerpc build

Unlike other architectures which sanitize the LDFLAGS from the
environment in arch/<arch>/Makefile.  The powerpc Makefile
allows LDFLAGS to be passed through resulting in the following
build failure.

  /usr/bin/ld: unrecognized option '-Wl,-z,relro'

LDFLAGS is set in /usr/lib/rpm/redhat/macros by default.  Clear
the environment variable when building kmods for powerpc.

Additionally, now that ppc64le exists it's not longer safe to
assume a powerpc system is big endian.  Rely on the endianness
provided by the compiler.

Reviewed-by: Giuseppe Di Natale <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #5856 

2 files changed, 10 insertions, 0 deletions

diff --git a/rpm/generic/zfs-kmod.spec.in b/rpm/generic/zfs-kmod.spec.in
index 9d10e6075..b635e6ea7 100644
--- a/rpm/generic/zfs-kmod.spec.in
+++ b/rpm/generic/zfs-kmod.spec.in
@@ -86,6 +86,11 @@ BuildRequires:             kmod-spl-devel = %{version}
 %global KmodsMetaRequires  spl-kmod
 %endif
 
+# LDFLAGS are not sanitized by arch/powerpc/Makefile (unlike other arches)
+%ifarch ppc ppc64 ppc64le
+%global __global_ldflags %{nil}
+%endif
+
 %if 0%{?fedora} >= 17
 %define prefix  /usr
 %endif
diff --git a/rpm/redhat/zfs-kmod.spec.in b/rpm/redhat/zfs-kmod.spec.in
index fa0c1108e..ae7e95d63 100644
--- a/rpm/redhat/zfs-kmod.spec.in
+++ b/rpm/redhat/zfs-kmod.spec.in
@@ -21,6 +21,11 @@ Requires:       spl-kmod\n\
 Requires:       @PACKAGE@ = %{version}\n\
 Conflicts:      @PACKAGE@-dkms\n\n" > %{_sourcedir}/kmod-preamble)
 
+# LDFLAGS are not sanitized by arch/powerpc/Makefile (unlike other arches)
+%ifarch ppc ppc64 ppc64le
+%global __global_ldflags %{nil}
+%endif
+
 %description
 This package contains the ZFS kernel modules.