uname_s := $(shell uname -s 2>/dev/null || echo "UNKNOWN_OS")
uname_rs := $(shell uname -rs)

objects := osl.o fd.o rbtree.o sha1.o
major_version := 0
minor_version := 1
patchlevel_version := 0
libname := osl


ifeq ($(uname_s),Linux)
	dso_opts := --shared -Wl,-soname,libosl.so.$(major_version)
	dso_filename :=lib$(libname).so.$(major_version).$(minor_version).$(patchlevel_version)
	# disallow undefined symbols
	LDFLAGS += -Wl,-z,defs
endif
ifeq ($(uname_s),Darwin)
	# Darwin has its own idea on version numbers:
	#
	# The minor version number is an incremental number using the format
	# X[.Y[.Z]]. To set the minor version number of a dynamic library, use
	# the gcc -current_version option.
	#
	# The compatibility version number of a library release specifies the
	# earliest minor version of the clients linked against that release can
	# use.
	dso_opts := -dynamiclib -current_version $(minor_version).$(patchlevel_version) \
		-compatibility_version $(minor_version).0 -fvisibility=hidden
	dso_filename := lib$(libname).$(major_version).dylib
endif
ifeq ($(uname_s),SunOS)
	dso_opts := --shared -z text -z defs
	dso_filename :=lib$(libname).so.$(major_version).$(minor_version).$(patchlevel_version)
	CPPFLAGS += -I/opt/csw/include
endif
ifeq ($(uname_s),FreeBSD)
	dso_opts := --shared -Wl,-soname,libosl.so.$(major_version)
	dso_filename :=lib$(libname).so.$(major_version).$(minor_version).$(patchlevel_version)
endif
ifeq ($(uname_s),NetBSD)
	dso_opts := --shared -Wl,-soname,libosl.so.$(major_version)
	dso_filename :=lib$(libname).so.$(major_version).$(minor_version).$(patchlevel_version)
endif
all: $(dso_filename)

DEBUG_CPPFLAGS += -Wno-sign-compare -g -Wunused -Wundef -W
DEBUG_CPPFLAGS += -Wredundant-decls
CPPFLAGS += -Os
CPPFLAGS += -Wall
CPPFLAGS += -Wuninitialized
CPPFLAGS += -Wchar-subscripts
CPPFLAGS += -Wformat-security
CPPFLAGS += -Werror-implicit-function-declaration
CPPFLAGS += -Wmissing-format-attribute
CPPFLAGS += -Wunused-macros
CPPFLAGS += -Wbad-function-cast
CPPFLAGS += -fPIC
CPPFLAGS += -fvisibility=hidden

Makefile.deps: $(wildcard *.c *.h)
	gcc -MM -MG *.c > $@

-include Makefile.deps

%.o: %.c Makefile
	$(CC) -c $(CPPFLAGS) $(DEBUG_CPPFLAGS) $<
$(dso_filename): $(objects)
	$(CC) $(dso_opts) -o $@ $(objects) $(LDFLAGS) -lcrypto

osl_errors.h: errlist
	sed -e 's/\([A-Z_]*\)	.*/	E_OSL_\1/' \
		-e '1s/^/enum osl_errors {/1' \
		-e '$$!s/$$/,/g' \
		-e '$$s/$$/};/1' $< > $@

errtab.h: errlist
	sed -e 's/^\([A-Z_]*\)\s*\(.*\)/_S(E_OSL_\1, \2)/g' $< > $@
osl.h: osl.h.in osl_errors.h
	cat $^ > $@
clean:
	rm -f *.o $(dso_filename) osl.h osl_errors.h errtab.h