Work around more gcc-11 false positive diagnostics

gcc-11.patch

@@ -18,4 +18,25 @@ index e25e32a..d23715c 100644
 +#pragma GCC diagnostic pop
  }
  
+ static void
+diff --git a/mmsghdr.c b/mmsghdr.c
+index 3fede19..5db35d8 100644
+--- a/mmsghdr.c
++++ b/mmsghdr.c
+@@ -78,6 +78,8 @@ static void
+ save_mmsgvec_namelen(struct tcb *const tcp, kernel_ulong_t addr,
+ 		     unsigned int len, const char *const timeout)
+ {
++#pragma GCC diagnostic push
++#pragma GCC diagnostic ignored "-Warray-bounds"
+ 	if (len > IOV_MAX)
+ 		len = IOV_MAX;
+ 
+@@ -99,6 +101,7 @@ save_mmsgvec_namelen(struct tcb *const tcp, kernel_ulong_t addr,
+ 	data->count = i;
+ 
+ 	set_tcb_priv_data(tcp, data, free_mmsgvec_data);
++#pragma GCC diagnostic pop
+ }
+ 
  static void

strace.spec

@@ -1,7 +1,7 @@
 Summary: Tracks and displays system calls associated with a running process
 Name: strace
 Version: 5.9
-Release: 2%{?dist}
+Release: 3%{?dist}
 # The test suite is GPLv2+, all the rest is LGPLv2.1+.
 License: LGPL-2.1+ and GPL-2.0+
 # Some distros require Group tag to be present,
@@ -100,6 +100,12 @@ done
 wait
 
 %check
+# The tests are riddled with an idiom that triggers a false positives
+# from gcc-11.  Out of bounds issues in the testsuite are not
+# particularly important, so we just make them non-fatal
+sed -i "s/-Werror$/-Werror -Wno-error=array-bounds -Wno-error=stringop-overread/" tests/Makefile
+sed -i "s/-Werror$/-Werror -Wno-error=array-bounds -Wno-error=stringop-overread/" tests-m32/Makefile
+sed -i "s/-Werror$/-Werror -Wno-error=array-bounds -Wno-error=stringop-overread/" tests-mx32/Makefile
 %{buildroot}%{_bindir}/strace -V
 %make_build -k check VERBOSE=1
 echo 'BEGIN OF TEST SUITE INFORMATION'
@@ -116,6 +122,9 @@ echo 'END OF TEST SUITE INFORMATION'
 %{_mandir}/man1/*
 
 %changelog
+* Wed Oct 21 2020 Eugene Syromyatnikov <esyr@redhat.com> - 5.9-3
+- Work around more gcc-11 false positive diagnostics
+
 * Wed Oct 21 2020 Eugene Syromyatnikov <esyr@redhat.com> - 5.9-2
 - Mark even more tests as XFAIL so the build succeedes
   (references: #1886468, #1886480).