#
#  Copyright (c) Red Hat Inc., 2008
#
#  This program is free software;  you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY;  without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
#  the GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program. If not, see <http://www.gnu.org/licenses/>.

# Author: Masatake YAMATO <yamato@redhat.com>
# Technique used here is suggested by Ngie Cooper <yaneurabeya@gmail.com>

# Usage:
#
# This makefile snippet is for writing test cases
# for foo16 system calls. Here I assume you already have
# test cases for foo like foo01, foo02.. fooN and I also
# assume the source file name for fooN is fooN.c.
# On the above assumption, this file does:
#
# * adding fooN_16 as MAKE_TARGETS,
# * making *.c depend on compat_16.h if the header file exists,
# * adding rules to build fooN_16 from fooN.c (and compat_16.h), and
# * passing a cpp symbol TST_USE_COMPAT16_SYSCALL to
#   CC when building fooN_16.
#
#
# You can use this file in following procedures:
#
# 1. write fooN.c.
# 2. add the code for 16 bit syscall and wrap
#    it #ifdef TST_USE_COMPAT16_SYSCALL/endif.
# 3. introduce your own compat_16.h if the ifdef
#    block is too large.
# 4. don't forget putting compat_16.h in all fooN.c
#    if you introduced compat_16.h.
# 5. include this file compat_16.mk in your Makefile.
# 6. use `+=' instead of `=' as assignment operator for MAKE_TARGETS.
# 7. Added extra definitions to CFLAGS in %_16 target if needed.
#
# See Makefile of setuid test case.
#

CPPFLAGS		+= -I$(abs_srcdir) -I$(abs_srcdir)/../utils

SRCS			?= $(wildcard $(abs_srcdir)/*.c)

MAKE_TARGETS		:= $(notdir $(patsubst %.c,%,$(SRCS)))
MAKE_TARGETS_OBJS_WO_COMPAT_16	:= $(addsuffix .o,$(MAKE_TARGETS))
MAKE_TARGETS		+= $(addsuffix _16,$(MAKE_TARGETS))

# XXX (garrcoop): This code should be put in question as it cannot be applied
# (no .h file, no TST_USE_NEWER64_SYSCALL def).
DEF_16			:= TST_USE_COMPAT16_SYSCALL

ifneq ($(COMPAT_TST_16_H),1)
COMPAT_16_H		:= $(abs_srcdir)/../utils/compat_16.h
else
COMPAT_16_H     := $(abs_srcdir)/../utils/compat_tst_16.h
endif

ifneq ($(wildcard $(COMPAT_16_H)),)
$(MAKE_TARGETS_OBJS_WO_COMPAT_16): $(COMPAT_16_H)
.INTERMEDIATE: $(MAKE_TARGETS_OBJS_WO_COMPAT_16)
endif

%_16: CPPFLAGS += -D$(DEF_16)=1
# XXX (garrcoop): End section of code in question..

%_16.o: %.c $(COMPAT_16_H)
	$(COMPILE.c) $(OUTPUT_OPTION) $<