[Skiboot] [RFC PATCH] external: Add Makefile targets to install libflash

[Samuel Mendoza-Jonas]

This adds a Makefile under external/shared to build a shared library of
libflash and install it.
This allows programs outside of the skiboot tree to link against
libflash in order to access MTD devices (eg. Petitboot).

Signed-off-by: Samuel Mendoza-Jonas <sam.mj at au1.ibm.com>
---
 external/shared/Makefile | 61 ++++++++++++++++++++++++++++++++++++++++++++++++
 external/shared/config.h | 19 +++++++++++++++
 2 files changed, 80 insertions(+)
 create mode 100644 external/shared/Makefile
 create mode 100644 external/shared/config.h

diff --git a/external/shared/Makefile b/external/shared/Makefile
new file mode 100644
index 0000000..80b144d
--- /dev/null
+++ b/external/shared/Makefile
@@ -0,0 +1,61 @@
+.DEFAULT_GOAL := all
+GET_ARCH = ../../external/common/get_arch.sh
+include ../../external/common/rules.mk
+
+ifndef PREFIX
+PREFIX = /usr/local/
+endif
+LIBDIR = $(PREFIX)/lib
+INCDIR = $(PREFIX)/include/libflash
+
+VERSION = 1.0
+
+CC = $(CROSS_COMPILE)gcc
+CFLAGS += -m64 -Werror -Wall -g2 -ggdb -I. -fPIC
+LDFLAGS += -m64
+ASFLAGS = -m64
+
+.PHONY: links
+links: libflash ccan common
+
+libflash:
+	ln -sf ../../libflash .
+
+common:
+	ln -sf ../common .
+
+ccan:
+	ln -sf ../../ccan .
+
+LIBFLASH_OBJS = libflash/file.o libflash/libflash.o libflash/libffs.o libflash/ecc.o libflash/blocklevel.o
+ARCHFLASH_OBJS = common/arch_flash.o
+OBJS = $(LIBFLASH_OBJS) $(ARCHFLASH_OBJS)
+
+LIBFLASH_H = libflash/file.h libflash/libflash.h libflash/libffs.h libflash/ffs.h libflash/ecc.h libflash/blocklevel.h libflash/errors.h
+ARCHFLASH_H = common/arch_flash.h
+
+%.o: %.c
+	$(CC) $(CFLAGS) $(CPPFLAGS) -c $< -o $@
+
+clean:
+	rm -f $(OBJS) *.so.$(VERSION)
+
+distclean: clean
+	rm -f ccan libflash common
+
+all: links arch_links $(OBJS)
+	($(CC) -shared -Wl,-soname,libflash.so -o libflash.so.$(VERSION) $(OBJS))
+
+install-lib: all
+	install -D -m 0755 libflash.so.$(VERSION) $(LIBDIR)/libflash.so.$(VERSION)
+	ldconfig -n $(LIBDIR)
+
+install-dev:
+	mkdir -p $(INCDIR)
+	install -m 0644 $(LIBFLASH_H) $(ARCHFLASH_H) $(INCDIR)
+
+install: install-lib install-dev
+
+uninstall:
+	rm -f $(LIBDIR)/libflash*
+	rm -rf $(INCDIR)
diff --git a/external/shared/config.h b/external/shared/config.h
new file mode 100644
index 0000000..a132a01
--- /dev/null
+++ b/external/shared/config.h
@@ -0,0 +1,19 @@
+/* For CCAN */
+
+#include <endian.h>
+#include <byteswap.h>
+
+#define HAVE_TYPEOF			1
+#define HAVE_BUILTIN_TYPES_COMPATIBLE_P	1
+
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define HAVE_BIG_ENDIAN         0
+#define HAVE_LITTLE_ENDIAN      1
+#else
+#define HAVE_BIG_ENDIAN         1
+#define HAVE_LITTLE_ENDIAN      0
+#endif
+
+#define HAVE_BYTESWAP_H 1
+#define HAVE_BSWAP_64	1
-- 
2.6.2