#!/usr/bin/m4
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#
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# Copyright (c) 2015-2017 Dmitry V. Levin <ldv@altlinux.org>
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# Copyright (c) 2015 Elvira Khabirova <lineprinter0@gmail.com>
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# Copyright (c) 2015-2018 The strace developers.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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# 3. The name of the author may not be used to endorse or promote products
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# derived from this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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AC_DEFUN([st_MPERS_LOAD_AC_CV], [
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pushdef([var], [ac_cv_$1])
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pushdef([saved], [saved_ac_cv_$1])
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pushdef([mpers], [ac_cv_]mpers_name[_$1])
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AS_IF([test -n "${var+set}"], [saved="${var}"; unset var])
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AS_IF([test -n "${mpers+set}"], [var="${mpers}"])
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popdef([mpers])
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popdef([saved])
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popdef([var])
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])
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AC_DEFUN([st_MPERS_SAVE_AC_CV], [
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pushdef([var], [ac_cv_$1])
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pushdef([saved], [saved_ac_cv_$1])
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pushdef([mpers], [ac_cv_]mpers_name[_$1])
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AS_IF([test -n "${var+set}"], [mpers="${var}"])
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AS_IF([test -n "${saved+set}"], [var="${saved}"; unset saved])
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popdef([mpers])
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popdef([saved])
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popdef([var])
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])
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AC_DEFUN([st_MPERS_STRUCT_STAT], [
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st_MPERS_LOAD_AC_CV([type_struct_stat$1])
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AC_CHECK_TYPE([struct stat$1],
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AC_DEFINE([HAVE_]MPERS_NAME[_STRUCT_STAT$1], [1],
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[Define to 1 if ]mpers_name[ has the type 'struct stat$1'.]),,
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[#include <sys/types.h>
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#include <asm/stat.h>])
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st_MPERS_SAVE_AC_CV([type_struct_stat$1])
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st_MPERS_LOAD_AC_CV([member_struct_stat$1_st_mtime_nsec])
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AC_CHECK_MEMBER([struct stat$1.st_mtime_nsec],
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AC_DEFINE([HAVE_]MPERS_NAME[_STRUCT_STAT$1_ST_MTIME_NSEC], [1],
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[Define to 1 if 'st_mtime_nsec' is a member of ]mpers_name[ 'struct stat$1'.]),,
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[#include <sys/types.h>
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#include <asm/stat.h>])
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st_MPERS_SAVE_AC_CV([member_struct_stat$1_st_mtime_nsec])
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])
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AC_DEFUN([st_MPERS],[
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pushdef([mpers_name], [$1])
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pushdef([MPERS_NAME], translit([$1], [a-z], [A-Z]))
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pushdef([HAVE_MPERS], [HAVE_]MPERS_NAME[_MPERS])
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pushdef([HAVE_RUNTIME], [HAVE_]MPERS_NAME[_RUNTIME])
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pushdef([MPERS_CFLAGS], [$cc_flags_$1])
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pushdef([st_cv_cc], [st_cv_$1_cc])
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pushdef([st_cv_runtime], [st_cv_$1_runtime])
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pushdef([st_cv_mpers], [st_cv_$1_mpers])
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case "$arch" in
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[$2])
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case "$enable_mpers" in
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yes|check|[$1])
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AH_TEMPLATE([HAVE_GNU_STUBS_32_H],
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[Define to 1 if you have the <gnu/stubs-32.h> header file.])
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AH_TEMPLATE([HAVE_GNU_STUBS_X32_H],
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[Define to 1 if you have the <gnu/stubs-x32.h> header file.])
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pushdef([gnu_stubs], [gnu/stubs-][m4_substr([$1], 1)][.h])
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AC_CHECK_HEADERS([gnu_stubs], [IFLAG=],
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[mkdir -p gnu
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: > gnu_stubs
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AC_MSG_NOTICE([Created empty gnu_stubs])
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IFLAG=-I.])
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popdef([gnu_stubs])
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saved_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS MPERS_CFLAGS $IFLAG"
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AC_CACHE_CHECK([for mpers_name personality compile support], [st_cv_cc],
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[AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#include <stdint.h>
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int main(){return 0;}]])],
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[st_cv_cc=yes],
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[st_cv_cc=no])])
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if test $st_cv_cc = yes; then
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AC_CACHE_CHECK([for mpers_name personality runtime support],
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[st_cv_runtime],
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[AC_RUN_IFELSE([AC_LANG_SOURCE([[#include <stdint.h>
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int main(){return 0;}]])],
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[st_cv_runtime=yes],
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[st_cv_runtime=no],
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[st_cv_runtime=no])])
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AC_CACHE_CHECK([whether mpers.sh mpers_name MPERS_CFLAGS works],
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[st_cv_mpers],
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[if READELF="$READELF" \
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CC="$CC" CPP="$CPP" CPPFLAGS="$CPPFLAGS $IFLAG" \
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$srcdir/mpers_test.sh [$1] MPERS_CFLAGS; then
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st_cv_mpers=yes
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else
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st_cv_mpers=no
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fi])
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if test $st_cv_mpers = yes; then
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AC_DEFINE(HAVE_MPERS, [1],
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[Define to 1 if you have mpers_name mpers support])
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st_MPERS_STRUCT_STAT([])
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st_MPERS_STRUCT_STAT([64])
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if test $st_cv_runtime = yes; then
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pushdef([SIZEOF_LONG],
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MPERS_NAME[_SIZEOF_LONG])
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st_MPERS_LOAD_AC_CV([sizeof_long])
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AC_CHECK_SIZEOF([long])
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st_MPERS_SAVE_AC_CV([sizeof_long])
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popdef([SIZEOF_LONG])
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pushdef([SIZEOF_KERNEL_LONG_T],
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MPERS_NAME[_SIZEOF_KERNEL_LONG_T])
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st_MPERS_LOAD_AC_CV([sizeof_kernel_long_t])
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AC_CHECK_SIZEOF([kernel_long_t],,
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[#include "$srcdir/kernel_types.h"])
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st_MPERS_SAVE_AC_CV([sizeof_kernel_long_t])
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popdef([SIZEOF_KERNEL_LONG_T])
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fi
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fi
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fi
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CFLAGS="$saved_CFLAGS"
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;;
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*) # case "$enable_mpers"
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st_cv_runtime=no
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st_cv_mpers=no
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;;
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esac
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test "$st_cv_mpers" = yes ||
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st_cv_mpers=no
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AC_MSG_CHECKING([whether to enable $1 personality support])
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AC_MSG_RESULT([$st_cv_mpers])
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case "$enable_mpers,$st_cv_mpers" in
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yes,no|[$1],no)
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AC_MSG_ERROR([Cannot enable $1 personality support])
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;;
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esac
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;;
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*) # case "$arch"
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st_cv_runtime=no
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st_cv_mpers=no
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;;
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esac
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AM_CONDITIONAL(HAVE_RUNTIME, [test "$st_cv_mpers$st_cv_runtime" = yesyes])
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AM_CONDITIONAL(HAVE_MPERS, [test "$st_cv_mpers" = yes])
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popdef([st_cv_mpers])
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popdef([st_cv_runtime])
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popdef([st_cv_cc])
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popdef([MPERS_CFLAGS])
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popdef([HAVE_RUNTIME])
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popdef([HAVE_MPERS])
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popdef([MPERS_NAME])
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popdef([mpers_name])
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])
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