workaround build issue on s390x

golang.spec

@@ -119,7 +119,7 @@ BuildRequires:  hostname
 BuildRequires:  net-tools
 %endif
 # for tests
-BuildRequires:  pcre-devel, glibc-static, perl
+BuildRequires:  pcre-devel, glibc-static, perl, procps-ng
 
 Provides:       go = %{version}-%{release}
 Requires:       %{name}-bin = %{version}-%{release}
@@ -140,6 +140,8 @@ Patch219: s390x-expose-IfInfomsg-X__ifi_pad.patch
 # https://github.com/golang/go/commit/94aba76639cf4d5e30975d846bb0368db8202269
 Patch220: 31bit-OID-asn1.patch
 
+Patch221: s390x-ignore-L0syms.patch
+
 # Having documentation separate was broken
 Obsoletes:      %{name}-docs < 1.1-4
 
@@ -513,6 +515,7 @@ fi
 - bump to 1.8.3
 - fix for CVE-2017-8932
 - make possible to use 31bit OID in ASN1
+- workaround build issue on s390x
 - Resolves: BZ#1454978, BZ#1455191
 
 * Fri Apr 21 2017 Jakub Čajka <jcajka@redhat.com> - 1.8.1-2

s390x-ignore-L0syms.patch

@@ -0,0 +1,18 @@
+diff --git a/src/cmd/link/internal/ld/ldelf.go b/src/cmd/link/internal/ld/ldelf.go
+index d4f9fc4..87dabaa 100644
+--- a/src/cmd/link/internal/ld/ldelf.go
++++ b/src/cmd/link/internal/ld/ldelf.go
+@@ -799,6 +799,13 @@ func ldelf(ctxt *Link, f *bio.Reader, pkg string, length int64, pn string) {
+ 				continue
+ 			}
+ 
++			if sect.name == ".debug_str" && strings.HasPrefix(sym.name, "L0") && sym.type_ == 0 {
++				// introduced by https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=49fced1206db40c71208c201165d65f92c69cebe on s390x
++				// TODO investigate from where they are actually coming from
++				// See issue 
++				continue
++			}
++
+ 			if strings.HasPrefix(sym.name, ".LASF") { // gcc on s390x does this
+ 				continue
+ 			}