From 58b6de2135c10b64918f25c48f69f144d08a9c0d Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Fri, 3 Jun 2022 19:10:15 +0200
Subject: [PATCH] check for sys/auxv.h

Check for sys/auxv.h to avoid the following uclibc build failure on
aarch64:

crc32c.c:277:10: fatal error: sys/auxv.h: No such file or directory
  277 | #include <sys/auxv.h>
      |          ^~~~~~~~~~~~

Fixes:
 - http://autobuild.buildroot.org/results/08591fbf9677ff126492c50c15170c641bcab56a

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Upstream status: not sent yet]
---
 configure.ac | 1 +
 crc32c.c     | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 0985f07..3337fe7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -516,6 +516,7 @@ AH_BOTTOM([#ifdef HAVE_INTTYPES_H
 #include <inttypes.h>
 #endif
 ])
+AC_CHECK_HEADERS([sys/auxv.h])
 
 dnl **********************************************************************
 dnl Figure out if this system has the stupid sasl_callback_ft
diff --git a/crc32c.c b/crc32c.c
index 26df879..05e61ff 100644
--- a/crc32c.c
+++ b/crc32c.c
@@ -273,7 +273,7 @@ void crc32c_init(void) {
     }
 }
 
-#elif defined(__aarch64__) && defined(__linux__)
+#elif defined(__aarch64__) && defined(__linux__) && defined(HAVE_SYS_AUX_H)
 #include <sys/auxv.h>
 
 #if defined(HWCAP_CRC32)
-- 
2.35.1