From c0e51f774c8c3c0ee763e166fd4534624966edcf Mon Sep 17 00:00:00 2001
From: Andrei Karas <akaras@inbox.ru>
Date: Mon, 30 Mar 2020 06:27:13 +0300
Subject: Enable libbacktrace by default only on Linux

---
 configure    | 25 +++++++++++++++++--------
 configure.ac | 19 ++++++++++++++-----
 2 files changed, 31 insertions(+), 13 deletions(-)

diff --git a/configure b/configure
index 9d65cdeb8..e3a8cc99a 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.ac 4cda256c4.
+# From configure.ac 7c9af5bf8.
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.69.
 #
@@ -3517,8 +3517,13 @@ $as_echo "$ac_cv_safe_to_define___extensions__" >&6; }
 
 
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking host OS" >&5
+$as_echo_n "checking host OS... " >&6; }
+host_os="`uname`"
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $host_os" >&5
+$as_echo "$host_os" >&6; }
+
 # Root-check
-host_is="`uname`"
 case $host_os in
 CYGWIN*)
 	;;
@@ -3812,7 +3817,16 @@ if test "${enable_libbacktrace+set}" = set; then :
 		esac
 
 else
-  enable_libbacktrace="no"
+
+		case $host_os in
+		Linux* )
+			enable_libbacktrace="yes"
+			;;
+		*)
+			enable_libbacktrace="no"
+			;;
+		esac
+
 
 fi
 
@@ -9109,11 +9123,6 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 #
 # Host specific stuff
 #
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking host OS" >&5
-$as_echo_n "checking host OS... " >&6; }
-host_os="`uname`"
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $host_os" >&5
-$as_echo "$host_os" >&6; }
 fd_setsize=""
 DLLEXT=".so"
 case $host_os in
diff --git a/configure.ac b/configure.ac
index e13fc4b6c..df3da8266 100644
--- a/configure.ac
+++ b/configure.ac
@@ -38,8 +38,11 @@ m4_ifdef([AC_USE_SYSTEM_EXTENSIONS],
 	[AC_GNU_SOURCE]
 )
 
+AC_MSG_CHECKING([host OS])
+host_os="`uname`"
+AC_MSG_RESULT([$host_os])
+
 # Root-check
-host_is="`uname`"
 case $host_os in
 CYGWIN*)
 	;;
@@ -330,7 +333,16 @@ AC_ARG_ENABLE(
 			*) AC_MSG_ERROR([[invalid argument --enable-libbacktrace=$enableval... stopping]]);;
 		esac
 	],
-	[enable_libbacktrace="no"]
+	[
+		case $host_os in
+		Linux* )
+			enable_libbacktrace="yes"
+			;;
+		*)
+			enable_libbacktrace="no"
+			;;
+		esac
+	]
 )
 
 #
@@ -1698,9 +1710,6 @@ AC_CHECK_FLAG(-fno-var-tracking)
 #
 # Host specific stuff
 #
-AC_MSG_CHECKING([host OS])
-host_os="`uname`"
-AC_MSG_RESULT([$host_os])
 fd_setsize=""
 DLLEXT=".so"
 case $host_os in
-- 
cgit v1.2.3-70-g09d2