Don't use ld(1) option --version-script on Darwin (OS X)

The linker on OS X does not support the --version-script flag. This
commit detects the Darwin/OS X OS in the Makefile and doesn't use the
flag in that case.

This is commit is mostly to keep the code compiling on OS X and to
document the issue.

Signed-off-by: Christian Lindig <[email protected]>

Author: lindig

Makefile

@@ -11,13 +11,19 @@
 
 NAME    = rrd-client-lib
 VERSION = 1.1.0
+OS 	:= $(shell uname)
 
 CC	= gcc
 CFLAGS	= -std=gnu99 -g -fpic -Wall
 OBJ	+= librrd.o
 OBJ 	+= parson/parson.o
 LIB     += -lz
 
+ifeq ($(OS),Darwin)
+LDFLAGS = -shared -Wl
+else
+LDFLAGS = -shared -Wl,--version-script=version.script
+endif
 
 .PHONY: all
 all:	librrd.a librrd.so rrdtest rrdclient
@@ -68,7 +74,7 @@ librrd.a: $(OBJ)
 	ranlib $@
 
 librrd.so: $(OBJ)
-	$(CC) -shared -Wl,--version-script=version.script -o $@ $(OBJ) $(LIB)
+	$(CC) $(LDFLAGS) -o $@ $(OBJ) $(LIB)
 
 rrdtest: rrdtest.o librrd.a
 	$(CC) $(CFLAGS) -o $@ $^ $(LIB)

travis-ci.sh

@@ -15,3 +15,4 @@ make
 make valgrind
 make test
 make test-integration
+make clean