fixing compilation issues without rpi headers

examples/src/Makefile.am

@@ -25,10 +25,11 @@ else
 bin_PROGRAMS += $(top_builddir)/bin/exampleServer $(top_builddir)/bin/exampleServerACPLT $(top_builddir)/bin/exampleServerMini
 
 __top_builddir__bin_exampleServer_CFLAGS = -I$(top_builddir)/src -I$(top_builddir)/include $(GLOBAL_AM_CFLAGS)
-__top_builddir__bin_exampleServer_SOURCES = opcuaServer.c networklayer.c raspberrypi_io.c
+__top_builddir__bin_exampleServer_SOURCES = opcuaServer.c networklayer.c
 __top_builddir__bin_exampleServer_LDADD= $(top_builddir)/lib/libopen62541.a $(GLOBAL_AM_LDADD)
 if RASPI
 __top_builddir__bin_exampleServer_LDFLAGS = -lwiringPi
+__top_builddir__bin_exampleServer_SOURCES += raspberrypi_io.c
 endif
 
 __top_builddir__bin_exampleServerACPLT_CFLAGS = -I$(top_builddir)/src -I$(top_builddir)/include $(GLOBAL_AM_CFLAGS)