From 9808741df6584c63f6b59db33e247bc9d1a89a23 Mon Sep 17 00:00:00 2001
From: Andre Noll <maan@systemlinux.org>
Date: Wed, 4 Jun 2008 16:12:14 +0200
Subject: [PATCH] Fix and document compile options on Darwin.

---
 Makefile | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/Makefile b/Makefile
index 3bcbfbe..8da3d1d 100644
--- a/Makefile
+++ b/Makefile
@@ -15,9 +15,18 @@ ifeq ($(uname_s),Linux)
 	LDFLAGS += -Wl,-z,defs
 endif
 ifeq ($(uname_s),Darwin)
-	dso_opts := -dynamiclib -current_version $(major_version).$(minor_version) \
-		-compatibility_version $(major_version).$(minor_version) -fvisibility=hidden
-	dso_filename := lib$(libname).$(major_version)
+	# Darwin has its own idea on version numbers:
+	#
+	# The minor version number is an incremental number using the format
+	# X[.Y[.Z]]. To set the minor version number of a dynamic library, use
+	# the gcc -current_version option.
+	#
+	# The compatibility version number of a library release specifies the
+	# earliest minor version of the clients linked against that release can
+	# use.
+	dso_opts := -dynamiclib -current_version $(minor_version).$(patchlevel_version) \
+		-compatibility_version $(minor_version).0 -fvisibility=hidden
+	dso_filename := lib$(libname).$(major_version).dylib
 endif
 ifeq ($(uname_s),SunOS)
 	dso_opts := --shared -z text -z defs
-- 
2.39.5