From 10d5bde8d628a93993dd7305dc9a406da69f65a9 Mon Sep 17 00:00:00 2001
From: Peter Seiderer <ps.report@gmx.net>
Date: Wed, 2 Dec 2015 00:22:26 +0100
Subject: [PATCH] Adjust for buildroot build.

 - enable CC override
 - fix devLib/gpio include path for local build (without installing first)
 - change CFLAGS from '=' to '+=' to honour buildroot given flags
 - add linker name link for libwiringPiDev and libwiringPi for local linking
   (without installing first)
 - fix install linker name link (do not link with absolute path)
 - add gpio-static linking target

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
---
 devLib/Makefile   |  9 +++++----
 gpio/Makefile     | 14 +++++++++-----
 wiringPi/Makefile |  7 ++++---
 3 files changed, 18 insertions(+), 12 deletions(-)

diff --git a/devLib/Makefile b/devLib/Makefile
index 1b1ebe0..84b4d2a 100644
--- a/devLib/Makefile
+++ b/devLib/Makefile
@@ -36,10 +36,10 @@ DYNAMIC=libwiringPiDev.so.$(VERSION)
 
 #DEBUG	= -g -O0
 DEBUG	= -O2
-CC	= gcc
-INCLUDE	= -I.
+CC	?= gcc
+INCLUDE	= -I../wiringPi
 DEFS	= -D_GNU_SOURCE
-CFLAGS	= $(DEBUG) $(DEFS) -Wformat=2 -Wall -Winline $(INCLUDE) -pipe -fPIC
+CFLAGS	+= $(DEBUG) $(DEFS) -Wformat=2 -Wall -Winline $(INCLUDE) -pipe -fPIC
 
 LIBS    =
 
@@ -69,6 +69,7 @@ $(STATIC):	$(OBJ)
 $(DYNAMIC):	$(OBJ)
 	$Q echo "[Link (Dynamic)]"
 	$Q $(CC) -shared -Wl,-soname,libwiringPiDev.so$(WIRINGPI_SONAME_SUFFIX) -o libwiringPiDev.so.$(VERSION) -lpthread $(OBJ)
+	$Q ln -sf libwiringPiDev.so.$(VERSION) libwiringPiDev.so
 
 .c.o:
 	$Q echo [Compile] $<
@@ -93,7 +94,7 @@ install:	$(DYNAMIC)
 	$Q echo "[Install Dynamic Lib]"
 	$Q install -m 0755 -d						$(DESTDIR)$(PREFIX)/lib
 	$Q install -m 0755 libwiringPiDev.so.$(VERSION)			$(DESTDIR)$(PREFIX)/lib/libwiringPiDev.so.$(VERSION)
-	$Q ln -sf $(DESTDIR)$(PREFIX)/lib/libwiringPiDev.so.$(VERSION)	$(DESTDIR)/lib/libwiringPiDev.so
+	$Q ln -sf libwiringPiDev.so.$(VERSION)				$(DESTDIR)$(PREFIX)/lib/libwiringPiDev.so
 	$Q $(LDCONFIG)
 
 .PHONY:	install-static
diff --git a/gpio/Makefile b/gpio/Makefile
index 7dcd090..dc4be72 100644
--- a/gpio/Makefile
+++ b/gpio/Makefile
@@ -32,11 +32,11 @@ endif
 
 #DEBUG	= -g -O0
 DEBUG	= -O2
-CC	= gcc
-INCLUDE	= -I$(DESTDIR)$(PREFIX)/include
-CFLAGS	= $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
+CC	?= gcc
+INCLUDE	= -I../wiringPi -I../devLib
+CFLAGS	+= $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
 
-LDFLAGS	= -L$(DESTDIR)$(PREFIX)/lib
+LDFLAGS	= -L../wiringPi -L../devLib
 LIBS    = -lwiringPi -lwiringPiDev -lpthread
 
 # May not need to  alter anything below this line
@@ -52,9 +52,13 @@ version.h:	../VERSION
 	$Q echo Need to run newVersion above.
 
 gpio:	$(OBJ)
-	$Q echo [Link]
+	$Q echo "[Link (Dynamic)]"
 	$Q $(CC) -o $@ $(OBJ) $(LDFLAGS) $(LIBS)
 
+gpio-static: $(OBJ)
+	$Q echo "[Link (Static)]"
+	$Q $(CC) -static -o gpio $(OBJ) ../wiringPi/libwiringPi.a ../devLib/libwiringPiDev.a -lpthread
+
 .c.o:
 	$Q echo [Compile] $<
 	$Q $(CC) -c $(CFLAGS) $< -o $@
diff --git a/wiringPi/Makefile b/wiringPi/Makefile
index acb6e58..8b84dc6 100644
--- a/wiringPi/Makefile
+++ b/wiringPi/Makefile
@@ -36,10 +36,10 @@ DYNAMIC=libwiringPi.so.$(VERSION)
 
 #DEBUG	= -g -O0
 DEBUG	= -O2
-CC	= gcc
+CC	?= gcc
 INCLUDE	= -I.
 DEFS	= -D_GNU_SOURCE
-CFLAGS	= $(DEBUG) $(DEFS) -Wformat=2 -Wall -Winline $(INCLUDE) -pipe -fPIC
+CFLAGS	+= $(DEBUG) $(DEFS) -Wformat=2 -Wall -Winline $(INCLUDE) -pipe -fPIC
 
 LIBS    =
 
@@ -90,6 +90,7 @@ $(STATIC):	$(OBJ)
 $(DYNAMIC):	$(OBJ)
 	$Q echo "[Link (Dynamic)]"
 	$Q $(CC) -shared -Wl,-soname,libwiringPi.so$(WIRINGPI_SONAME_SUFFIX) -o libwiringPi.so.$(VERSION) -lpthread $(OBJ)
+	$Q ln -sf libwiringPi.so.$(VERSION) libwiringPi.so
 
 .c.o:
 	$Q echo [Compile] $<
@@ -115,7 +116,7 @@ install:	$(DYNAMIC)
 	$Q echo "[Install Dynamic Lib]"
 	$Q install -m 0755 -d						$(DESTDIR)$(PREFIX)/lib
 	$Q install -m 0755 libwiringPi.so.$(VERSION)			$(DESTDIR)$(PREFIX)/lib/libwiringPi.so.$(VERSION)
-	$Q ln -sf $(DESTDIR)$(PREFIX)/lib/libwiringPi.so.$(VERSION)	$(DESTDIR)/lib/libwiringPi.so
+	$Q ln -sf libwiringPi.so.$(VERSION)				$(DESTDIR)$(PREFIX)/lib/libwiringPi.so
 	$Q $(LDCONFIG)
 
 .PHONY:	install-static
-- 
2.11.0