btrace: fix test build error in gdb.btrace/instruction_history.c

On systems with a newer version of GCC the gdb.btrace/instruction_history.exp
test fails to build like this:

    Running .../gdb.btrace/instruction_history.exp ...
    gdb compile failed, .../gdb.btrace/instruction_history.c:
    In function 'main': .../gdb.btrace/instruction_history.c:24:3: warning:
    implicit declaration of function 'loop' [-Wimplicit-function-declaration]
       loop ();
       ^

Declare loop to fix it.

testsuite/
	* gdb.btrace/instruction_history.c (loop): Add declaration.

diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index d3d400b..e7a0f3f 100644 (file)
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2016-04-13  Markus Metzger  <markus.t.metzger@intel.com>
+
+       * gdb.btrace/instruction_history.c (loop): Add declaration.
+
 2016-04-12  Antoine Tremblay  <antoine.tremblay@ericsson.com>
 
        * gdb.trace/ftrace.exp (proc): Change test prefix from "ond" to "cond".

diff --git a/gdb/testsuite/gdb.btrace/instruction_history.c b/gdb/testsuite/gdb.btrace/instruction_history.c
index bf8f60e..8178535 100644 (file)
--- a/gdb/testsuite/gdb.btrace/instruction_history.c
+++ b/gdb/testsuite/gdb.btrace/instruction_history.c
@@ -17,6 +17,8 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
+extern void loop (void);
+
 int
 main (void)
 {