From 1d2425febf2020e38db70188df582acc9f37b136 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Thu, 30 Mar 2017 13:01:33 -0700
Subject: [PATCH] check for libexecinfo providing backtrace() APIs

on musl it depends on external library to provide backtrace APIs
unlike glibc where it is bundled in

Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 configure.ac | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/configure.ac b/configure.ac
index aa3291c..b15f65d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -15,6 +15,7 @@ AM_PROG_CC_C_O
 
 # Checks for libraries.
 AC_CHECK_LIB([crypt], [crypt])
+AC_CHECK_LIB([execinfo], [backtrace])
 
 # Check for PAM support
 AC_ARG_WITH(pam, AC_HELP_STRING([--with-pam],[Use PAM for authentication]),
@@ -33,6 +34,7 @@ AM_CONDITIONAL(HAVE_PAM, [test -n "$USE_PAM" -a "x$USE_PAM" != xno ])
 # Checks for header files.
 AC_PATH_X
 AC_CHECK_HEADERS([shadow.h stdlib.h string.h unistd.h utmpx.h])
+AC_CHECK_HEADERS([execinfo.h])
 
 # Checks for typedefs, structures, and compiler characteristics.
 AC_TYPE_PID_T
-- 
2.12.1