[rhel dts libipt] Fix#2 [-Werror=implicit-fallthrough=] with gcc-7.1.1.

gdb.spec

@@ -26,7 +26,7 @@ Version: 8.0
 
 # The release always contains a leading reserved number, start it at 1.
 # `upstream' is not a part of `name' to stay fully rpm dependencies compatible for the testing.
-Release: 14%{?dist}
+Release: 15%{?dist}
 
 License: GPLv3+ and GPLv3+ with exceptions and GPLv2+ and GPLv2+ with exceptions and GPL+ and LGPLv2+ and LGPLv3+ and BSD and Public Domain and GFDL
 Group: Development/Debuggers
@@ -1615,6 +1615,9 @@ then
 fi
 
 %changelog
+* Fri Jun  9 2017 Jan Kratochvil <jan.kratochvil@redhat.com> - 8.0-15.fc26
+- [rhel dts libipt] Fix#2 [-Werror=implicit-fallthrough=] with gcc-7.1.1.
+
 * Fri Jun  9 2017 Jan Kratochvil <jan.kratochvil@redhat.com> - 8.0-14.fc26
 - [rhel dts libipt] Fix [-Werror=implicit-fallthrough=] with gcc-7.1.1.
 

v1.6.1-implicit-fallthrough.patch

@@ -7,13 +7,17 @@ gcc-7.1.1-1.fc27.x86_64
   case ptbq_decode: {
   ^~~~
 
---- processor-trace-1.6.1-orig/libipt/src/pt_block_decoder.c	2017-05-31 13:30:32.000000000 +0200
-+++ processor-trace-1.6.1/libipt/src/pt_block_decoder.c	2017-06-09 07:24:12.644587611 +0200
-@@ -2324,6 +2324,7 @@ static int pt_blk_proceed_no_event_cache
+diff --git a/libipt/src/pt_block_decoder.c b/libipt/src/pt_block_decoder.c
+index 21783a6..91d5bb3 100644
+--- a/libipt/src/pt_block_decoder.c
++++ b/libipt/src/pt_block_decoder.c
+@@ -2095,6 +2095,9 @@ static int pt_blk_proceed_no_event_cached(struct pt_block_decoder *decoder,
  		}
  
  		/* Fall through to ptbq_decode. */
++#if __GNUC__ >= 7
 +		__attribute__ ((fallthrough));
++#endif
  
  	case ptbq_decode: {
  		struct pt_insn_ext iext;