[PATCH v1 10/11] perf config: undeclared PATH_MAX due to missing <limits.h> inclusion

[Ian Rogers]

Sashiko reported:

  When compiling the perf tool against a strict C library such as musl
  libc, a build failure occurs in home_perfconfig() and
  perf_config__set_variable() due to an undeclared PATH_MAX
  identifier.

  The PATH_MAX macro is defined in the standard POSIX <limits.h>
  header.  Because tools/perf/util/config.c does not explicitly
  include this header, build environments that lack implicit header
  inclusion fail to resolve the identifier. This causes a compiler
  error when evaluating the size of stack-allocated path arrays,
  stopping the build.

Add the header file.

Reported-by: sashiko-bot@xxxxxxxxxx
Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
 tools/perf/util/config.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index b2972c35c1ec..5d0cfd86ede6 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -12,6 +12,7 @@
 #include "config.h"
 
 #include <errno.h>
+#include <limits.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
-- 
2.55.0.1082.g2b9226bbc0-goog