From 56e87e3bdb15ee22b5b435a7263b56583c791c88 Mon Sep 17 00:00:00 2001
From: bubnikv <bubnikv@gmail.com>
Date: Wed, 14 Dec 2016 16:51:27 +0100
Subject: [PATCH] Set BOOST_LOG_DYN_LINK symbol when linking with dynamic boost
 libraries.

---
 xs/Build.PL | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/xs/Build.PL b/xs/Build.PL
index b3e000f5c..e64a9a399 100644
--- a/xs/Build.PL
+++ b/xs/Build.PL
@@ -119,12 +119,16 @@ if (defined $ENV{BOOST_LIBRARYDIR}) {
 my $have_boost = 0;
 my @boost_libraries = qw(system thread log);  # we need these
 
-# check without explicit lib path (works on Linux)
-if (!$ENV{SLIC3R_STATIC} && ! $mswin) {
-    $have_boost = 1
-        if check_lib(
-            lib     => [ map "boost_${_}", @boost_libraries ],
-        );
+if (!$ENV{SLIC3R_STATIC}) {
+    # Dynamic linking of boost libraries.
+    push @cflags, qw(-BOOST_LOG_DYN_LINK);
+    if (! $mswin) {
+        # Check without explicit lib path (works on Linux and OSX).
+        $have_boost = 1
+            if check_lib(
+                lib     => [ map "boost_${_}", @boost_libraries ],
+            );
+    }
 }
 
 if ($have_boost) {