perf tools: Create pager.h

Move the 'pager' function prototypes into a new pager.h so that the
pager code can be moved out to a library.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/ba7c316474dd6bfc047e5c6dc4dcab39a982caf5.1449965119.git.jpoimboe@redhat.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/cache.h

@@ -4,6 +4,7 @@
 #include <stdbool.h>
 #include "util.h"
 #include "strbuf.h"
+#include "pager.h"
 #include "../perf.h"
 #include "../ui/ui.h"
 
@@ -28,10 +29,6 @@ extern int perf_config_bool(const char *, const char *);
 extern int config_error_nonbool(const char *);
 extern const char *perf_config_dirname(const char *, const char *);
 
-/* pager.c */
-extern void setup_pager(void);
-extern int pager_in_use(void);
-
 char *alias_lookup(const char *alias);
 int split_cmdline(char *cmdline, const char ***argv);
 

tools/perf/util/pager.h

+#ifndef __PERF_PAGER_H
+#define __PERF_PAGER_H
+
+extern void setup_pager(void);
+extern int pager_in_use(void);
+
+#endif /* __PERF_PAGER_H */