Bad make file for examples.

[tvonderhaar]

The current g++ compiler requires that -l option come after the compilation unit that refers to functions within the library. The previous g++ compilers may have allowed the '-l' option before the requesting compilation units, but this was wrong and is now being enforced by the current compiler. This must be changed in the examples subdirectory Makefile or it won't link complaining about undefined references to functions in the "libArduiPi_OLED.so.1" shared library. The correct Make file follows:

`#*********************************************************************

This is the makefile for the Adafruit SSD1306 OLED library driver

02/18/2013 Charles-Henri Hallard (http://hallard.me)

Modified for compiling and use on Raspberry ArduiPi Board

LCD size and connection are now passed as arguments on

the command line (no more #define on compilation needed)

ArduiPi project documentation http://hallard.me/arduipi

08/26/2015 Lorenzo Delana (lorenzo.delana@gmail.com)

added bananapi specific CCFLAGS and conditional macro BANANPI

*********************************************************************

Makefile itself dir

ROOT_DIR:=$(shell dirname $(realpath $(lastword $(MAKEFILE_LIST))))

hw platform as from autogen.sh choose

HWPLAT:=$(shell cat $(ROOT_DIR)/../hwplatform)

sets CCFLAGS hw platform dependant

ifeq ($(HWPLAT),BananaPI)
CCFLAGS=-Wall -Ofast -mfpu=vfpv4 -mfloat-abi=hard -march=armv7 -mtune=cortex-a7 -DBANANAPI
else # fallback to raspberry
# The recommended compiler flags for the Raspberry Pi
CCFLAGS=-Ofast -mfpu=vfp -mfloat-abi=hard -march=armv6zk -mtune=arm1176jzf-s
endif

prefix := /usr/local

define all programs

PROGRAMS = oled_demo teleinfo-oled
SOURCES = ${PROGRAMS:=.cpp}

CXX=g++
CFLAGS=${CCFLAGS}

all: ${PROGRAMS}

${PROGRAMS}: ${SOURCES}
#TLV; '-l' argument must be last option on the CXX line.
$(CXX) $(CFLAGS) -Wall $@.cpp -o $@ -lArduiPi_OLED

clean:
rm -rf $(PROGRAMS)

install: all
test -d $(prefix) || mkdir $(prefix)
test -d $(prefix)/bin || mkdir $(prefix)/bin
for prog in $(PROGRAMS); do
install -m 0755 $$prog $(prefix)/bin;
done

.PHONY: install
`

You nay want to update the git so future user aren't caught by this error.

Tom