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# Autoconf M4 include file defining utility macros for complex Canadian

# cross builds.

dnl ####

dnl # _GCC_TOPLEV_NONCANONICAL_BUILD

dnl # $build_alias or canonical $build if blank.

dnl # Used when we would use $build_alias, but empty is not OK.

AC_DEFUN([_GCC_TOPLEV_NONCANONICAL_BUILD],

[AC_REQUIRE([AC_CANONICAL_BUILD]) []dnl

case ${build_alias} in

  "") build_noncanonical=${build} ;;

  *) build_noncanonical=${build_alias} ;;

esac

]) []dnl # _GCC_TOPLEV_NONCANONICAL_BUILD

dnl ####

dnl # _GCC_TOPLEV_NONCANONICAL_HOST

dnl # $host_alias, or $build_noncanonical if blank.

dnl # Used when we would use $host_alias, but empty is not OK.

AC_DEFUN([_GCC_TOPLEV_NONCANONICAL_HOST],

[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl

case ${host_alias} in

  "") host_noncanonical=${build_noncanonical} ;;

  *) host_noncanonical=${host_alias} ;;

esac

]) []dnl # _GCC_TOPLEV_NONCANONICAL_HOST

dnl ####

dnl # _GCC_TOPLEV_NONCANONICAL_TARGET

dnl # $target_alias or $host_noncanonical if blank.

dnl # Used when we would use $target_alias, but empty is not OK.

AC_DEFUN([_GCC_TOPLEV_NONCANONICAL_TARGET],

[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_HOST]) []dnl

case ${target_alias} in

  "") target_noncanonical=${host_noncanonical} ;;

  *) target_noncanonical=${target_alias} ;;

esac

]) []dnl # _GCC_TOPLEV_NONCANONICAL_TARGET

dnl ####

dnl # ACX_NONCANONICAL_BUILD

dnl # Like underscored version, but AC_SUBST's.

AC_DEFUN([ACX_NONCANONICAL_BUILD],

[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl

AC_SUBST(build_noncanonical)

]) []dnl # ACX_NONCANONICAL_BUILD

dnl ####

dnl # ACX_NONCANONICAL_HOST

dnl # Like underscored version, but AC_SUBST's.

AC_DEFUN([ACX_NONCANONICAL_HOST],

[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_HOST]) []dnl

AC_SUBST(host_noncanonical)

]) []dnl # ACX_NONCANONICAL_HOST

dnl ####

dnl # ACX_NONCANONICAL_TARGET

dnl # Like underscored version, but AC_SUBST's.

AC_DEFUN([ACX_NONCANONICAL_TARGET],

[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_TARGET]) []dnl

AC_SUBST(target_noncanonical)

]) []dnl # ACX_NONCANONICAL_TARGET

dnl ####

dnl # GCC_TOPLEV_SUBDIRS

dnl # GCC & friends build 'build', 'host', and 'target' tools.  These must

dnl # be separated into three well-known subdirectories of the build directory:

dnl # build_subdir, host_subdir, and target_subdir.  The values are determined

dnl # here so that they can (theoretically) be changed in the future.  They

dnl # were previously reproduced across many different files.

dnl #

dnl # This logic really amounts to very little with autoconf 2.13; it will

dnl # amount to a lot more with autoconf 2.5x.

AC_DEFUN([GCC_TOPLEV_SUBDIRS],

[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_TARGET]) []dnl

AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl

# Prefix 'build-' so this never conflicts with target_subdir.

build_subdir="build-${build_noncanonical}"

# --srcdir=. covers the toplevel, while "test -d" covers the subdirectories

if ( test $srcdir = . && test -d gcc ) \

   || test -d $srcdir/../host-${host_noncanonical}; then

  host_subdir="host-${host_noncanonical}"

else

  host_subdir=.

fi

# No prefix.

target_subdir=${target_noncanonical}

AC_SUBST([build_subdir]) []dnl

AC_SUBST([host_subdir]) []dnl

AC_SUBST([target_subdir]) []dnl

]) []dnl # GCC_TOPLEV_SUBDIRS

####

# _NCN_TOOL_PREFIXES:  Some stuff that oughtta be done in AC_CANONICAL_SYSTEM

# or AC_INIT.

# These demand that AC_CANONICAL_SYSTEM be called beforehand.

AC_DEFUN([_NCN_TOOL_PREFIXES],

[ncn_tool_prefix=

test -n "$host_alias" && ncn_tool_prefix=$host_alias-

ncn_target_tool_prefix=

test -n "$target_alias" && ncn_target_tool_prefix=$target_alias-

]) []dnl # _NCN_TOOL_PREFIXES

####

# NCN_STRICT_CHECK_TOOLS(variable, progs-to-check-for,[value-if-not-found],[path])

# Like plain AC_CHECK_TOOLS, but require prefix if build!=target.

AC_DEFUN([NCN_STRICT_CHECK_TOOLS],

[AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl

for ncn_progname in $2; do

  if test -n "$ncn_tool_prefix"; then

    AC_CHECK_PROG([$1], [${ncn_tool_prefix}${ncn_progname}],

                  [${ncn_tool_prefix}${ncn_progname}], , [$4])

  fi

  if test -z "$ac_cv_prog_$1" && test $build = $host ; then

    AC_CHECK_PROG([$1], [${ncn_progname}], [${ncn_progname}], , [$4])

  fi

  test -n "$ac_cv_prog_$1" && break

done

if test -z "$ac_cv_prog_$1" ; then

  ifelse([$3],[], [set dummy $2

  if test $build = $host ; then

    $1="[$]2"

  else

    $1="${ncn_tool_prefix}[$]2"

  fi], [$1="$3"])

fi

]) []dnl # NCN_STRICT_CHECK_TOOLS

####

# NCN_STRICT_CHECK_TARGET_TOOLS(variable, progs-to-check-for,[value-if-not-found],[path])

# Like CVS Autoconf AC_CHECK_TARGET_TOOLS, but require prefix if build!=target.

AC_DEFUN([NCN_STRICT_CHECK_TARGET_TOOLS],

[AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl

for ncn_progname in $2; do

  if test -n "$ncn_target_tool_prefix"; then

    AC_CHECK_PROG([$1], [${ncn_target_tool_prefix}${ncn_progname}],

                  [${ncn_target_tool_prefix}${ncn_progname}], , [$4])

  fi

  if test -z "$ac_cv_prog_$1" && test $build = $target ; then

    AC_CHECK_PROG([$1], [${ncn_progname}], [${ncn_progname}], , [$4])

  fi

  test -n "$ac_cv_prog_$1" && break

done

if test -z "$ac_cv_prog_$1" ; then

  ifelse([$3],[], [set dummy $2

  if test $build = $target ; then

    $1="[$]2"

  else

    $1="${ncn_target_tool_prefix}[$]2"

  fi], [$1="$3"])

fi

]) []dnl # NCN_STRICT_CHECK_TARGET_TOOLS

###

# AC_PROG_CPP_WERROR

# Used for autoconf 2.5x to force AC_PREPROC_IFELSE to reject code which

# triggers warnings from the preprocessor.  Will be in autoconf 2.58.

# For now, using this also overrides header checks to use only the

# preprocessor (matches 2.13 behavior; matching 2.58's behavior is a

# bit harder from here).

# Eventually autoconf will default to checking headers with the compiler

# instead, and we'll have to do this differently.

AC_DEFUN([AC_PROG_CPP_WERROR],

[AC_REQUIRE([AC_PROG_CPP])dnl

m4_define([AC_CHECK_HEADER],m4_defn([_AC_CHECK_HEADER_OLD]))

ac_c_preproc_warn_flag=yes])# AC_PROG_CPP_WERROR

# Test for GNAT.

# We require the gnatbind program, and a compiler driver that

# understands Ada.  We use the user's CC setting, already found.

#

# Sets the shell variable have_gnat to yes or no as appropriate, and

# substitutes GNATBIND.

AC_DEFUN([ACX_PROG_GNAT],

[AC_REQUIRE([AC_CHECK_TOOL_PREFIX])

AC_REQUIRE([AC_PROG_CC])

AC_CHECK_TOOL(GNATBIND, gnatbind, no)

AC_CACHE_CHECK([whether compiler driver understands Ada],

                 acx_cv_cc_gcc_supports_ada,

[cat >conftest.adb <<EOF

procedure conftest is begin null; end conftest;

EOF

acx_cv_cc_gcc_supports_ada=no

# There is a bug in old released versions of GCC which causes the

# driver to exit successfully when the appropriate language module

# has not been installed.  This is fixed in 2.95.4, 3.0.2, and 3.1.

# Therefore we must check for the error message as well as an

# unsuccessful exit.

# Other compilers, like HP Tru64 UNIX cc, exit successfully when

# given a .adb file, but produce no object file.  So we must check

# if an object file was really produced to guard against this.

errors=`(${CC} -c conftest.adb) 2>&1 || echo failure`

if test x"$errors" = x && test -f conftest.$ac_objext; then

  acx_cv_cc_gcc_supports_ada=yes

fi

rm -f conftest.*])

if test x$GNATBIND != xno && test x$acx_cv_cc_gcc_supports_ada != xno; then

  have_gnat=yes

else

  have_gnat=no

fi

])

dnl 'make compare' can be significantly faster, if cmp itself can

dnl skip bytes instead of using tail.  The test being performed is

dnl "if cmp --ignore-initial=2 t1 t2 && ! cmp --ignore-initial=1 t1 t2"

dnl but we need to sink errors and handle broken shells.  We also test

dnl for the parameter format "cmp file1 file2 skip1 skip2" which is

dnl accepted by cmp on some systems.

AC_DEFUN([ACX_PROG_CMP_IGNORE_INITIAL],

[AC_CACHE_CHECK([how to compare bootstrapped objects], gcc_cv_prog_cmp_skip,

[ echo abfoo >t1

  echo cdfoo >t2

  gcc_cv_prog_cmp_skip='tail +16c $$f1 > tmp-foo1; tail +16c $$f2 > tmp-foo2; cmp tmp-foo1 tmp-foo2'

  if cmp t1 t2 2 2 > /dev/null 2>&1; then

    if cmp t1 t2 1 1 > /dev/null 2>&1; then

      :

    else

      gcc_cv_prog_cmp_skip='cmp $$f1 $$f2 16 16'

    fi

  fi

  if cmp --ignore-initial=2 t1 t2 > /dev/null 2>&1; then

    if cmp --ignore-initial=1 t1 t2 > /dev/null 2>&1; then

      :

    else

      gcc_cv_prog_cmp_skip='cmp --ignore-initial=16 $$f1 $$f2'

    fi

  fi

  rm t1 t2

])

do_compare="$gcc_cv_prog_cmp_skip"

AC_SUBST(do_compare)

])

dnl See whether we can include both string.h and strings.h.

AC_DEFUN([ACX_HEADER_STRING],

[AC_CACHE_CHECK([whether string.h and strings.h may both be included],

  gcc_cv_header_string,

[AC_TRY_COMPILE([#include <string.h>

#include <strings.h>], , gcc_cv_header_string=yes, gcc_cv_header_string=no)])

if test $gcc_cv_header_string = yes; then

  AC_DEFINE(STRING_WITH_STRINGS, 1, [Define if you can safely include both <string.h> and <strings.h>.])

fi

])

dnl See if stdbool.h properly defines bool and true/false.

dnl Check whether _Bool is built-in.

AC_DEFUN([ACX_HEADER_STDBOOL],

[AC_CACHE_CHECK([for working stdbool.h],

  ac_cv_header_stdbool_h,

[AC_TRY_COMPILE([#include <stdbool.h>],

[bool foo = false;],

ac_cv_header_stdbool_h=yes, ac_cv_header_stdbool_h=no)])

if test $ac_cv_header_stdbool_h = yes; then

  AC_DEFINE(HAVE_STDBOOL_H, 1,

  [Define if you have a working <stdbool.h> header file.])

fi

AC_CACHE_CHECK(for built-in _Bool, gcc_cv_c__bool,

[AC_TRY_COMPILE(,

[_Bool foo;],

gcc_cv_c__bool=yes, gcc_cv_c__bool=no)

])

if test $gcc_cv_c__bool = yes; then

  AC_DEFINE(HAVE__BOOL, 1, [Define if the \`_Bool' type is built-in.])

fi

])

dnl See if hard links work and if not, try to substitute $1 or simple copy.

AC_DEFUN([ACX_PROG_LN],

[AC_MSG_CHECKING(whether ln works)

AC_CACHE_VAL(acx_cv_prog_LN,

[rm -f conftestdata_t

echo >conftestdata_f

if ln conftestdata_f conftestdata_t 2>/dev/null

then

  acx_cv_prog_LN=ln

else

  acx_cv_prog_LN=no

fi

rm -f conftestdata_f conftestdata_t

])dnl

if test $acx_cv_prog_LN = no; then

  LN="ifelse([$1],,cp,[$1])"

  AC_MSG_RESULT([no, using $LN])

else

  LN="$acx_cv_prog_LN"

  AC_MSG_RESULT(yes)

fi

AC_SUBST(LN)dnl

])

dnl GCC_TARGET_TOOL(PROGRAM, TARGET-VAR, HOST-VAR, IN-TREE-TOOL, LANGUAGE)

AC_DEFUN([GCC_TARGET_TOOL],

[AC_MSG_CHECKING(where to find the target $1)

if test "x${build}" != "x${host}" ; then

  # Canadian cross, just use what we found

  AC_MSG_RESULT(pre-installed)

else

  ifelse([$4],,,

  [ok=yes

  case " ${configdirs} " in

    *" patsubst([$4], [/.*], []) "*) ;;

    *) ok=no ;;

  esac

  ifelse([$5],,,

  [case ,${enable_languages}, in

    *,$5,*) ;;

    *) ok=no ;;

  esac])

  if test $ok = yes; then

    # An in-tree tool is available and we can use it

    $2='$$r/$(HOST_SUBDIR)/$4'

    AC_MSG_RESULT(just compiled)

  el])if test "x$target" = "x$host"; then

    # We can use an host tool

    $2='$($3)'

    AC_MSG_RESULT(host tool)

  else

    # We need a cross tool

    AC_MSG_RESULT(pre-installed)

  fi

fi])