From 3744ca1e670e6155ead37d9123ff005b07108259 Mon Sep 17 00:00:00 2001
From: Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Tue, 23 Jun 2020 10:09:03 -0300
Subject: [PATCH] perf expr: Add missing headers noticed when building with
 NO_LIBBPF=1

These will break the build as soon as we stop disabling all warnings
when building flex and bison generated files, so add them before we do
that to keep the tree bisectable.

Noticed when building on centos:7 with NO_LIBBPF=1:

  util/expr.c: In function 'key_equal':
  util/expr.c:29:2: error: implicit declaration of function 'strcmp' [-Werror=implicit-function-declaration]
    return !strcmp((const char *)key1, (const char *)key2);
    ^
  util/expr.c: In function 'expr__add_id':
  util/expr.c:40:3: error: implicit declaration of function 'malloc' [-Werror=implicit-function-declaration]
     val_ptr = malloc(sizeof(double));
     ^
  util/expr.c:40:13: error: incompatible implicit declaration of built-in function 'malloc' [-Werror]
     val_ptr = malloc(sizeof(double));
               ^
  util/expr.c:42:12: error: 'ENOMEM' undeclared (first use in this function)
      return -ENOMEM;
              ^
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jin Yao <yao.jin@linux.intel.com>
Cc: John Garry <john.garry@huawei.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/expr.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/util/expr.c b/tools/perf/util/expr.c
index f64ab91c432b..e8f777830a23 100644
--- a/tools/perf/util/expr.c
+++ b/tools/perf/util/expr.c
@@ -1,6 +1,9 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <stdbool.h>
 #include <assert.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
 #include "expr.h"
 #include "expr-bison.h"
 #include "expr-flex.h"