493 lines
16 KiB
Plaintext
493 lines
16 KiB
Plaintext
# Autoconf M4 include file defining utility macros for complex Canadian
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# cross builds.
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dnl ####
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dnl # _GCC_TOPLEV_NONCANONICAL_BUILD
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dnl # $build_alias or canonical $build if blank.
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dnl # Used when we would use $build_alias, but empty is not OK.
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AC_DEFUN([_GCC_TOPLEV_NONCANONICAL_BUILD],
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[AC_REQUIRE([AC_CANONICAL_BUILD]) []dnl
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case ${build_alias} in
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"") build_noncanonical=${build} ;;
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*) build_noncanonical=${build_alias} ;;
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esac
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]) []dnl # _GCC_TOPLEV_NONCANONICAL_BUILD
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dnl ####
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dnl # _GCC_TOPLEV_NONCANONICAL_HOST
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dnl # $host_alias, or $build_noncanonical if blank.
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dnl # Used when we would use $host_alias, but empty is not OK.
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AC_DEFUN([_GCC_TOPLEV_NONCANONICAL_HOST],
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[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl
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case ${host_alias} in
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"") host_noncanonical=${build_noncanonical} ;;
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*) host_noncanonical=${host_alias} ;;
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esac
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]) []dnl # _GCC_TOPLEV_NONCANONICAL_HOST
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dnl ####
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dnl # _GCC_TOPLEV_NONCANONICAL_TARGET
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dnl # $target_alias or $host_noncanonical if blank.
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dnl # Used when we would use $target_alias, but empty is not OK.
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AC_DEFUN([_GCC_TOPLEV_NONCANONICAL_TARGET],
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[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_HOST]) []dnl
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case ${target_alias} in
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"") target_noncanonical=${host_noncanonical} ;;
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*) target_noncanonical=${target_alias} ;;
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esac
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]) []dnl # _GCC_TOPLEV_NONCANONICAL_TARGET
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dnl ####
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dnl # ACX_NONCANONICAL_BUILD
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dnl # Like underscored version, but AC_SUBST's.
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AC_DEFUN([ACX_NONCANONICAL_BUILD],
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[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl
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AC_SUBST(build_noncanonical)
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]) []dnl # ACX_NONCANONICAL_BUILD
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dnl ####
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dnl # ACX_NONCANONICAL_HOST
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dnl # Like underscored version, but AC_SUBST's.
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AC_DEFUN([ACX_NONCANONICAL_HOST],
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[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_HOST]) []dnl
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AC_SUBST(host_noncanonical)
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]) []dnl # ACX_NONCANONICAL_HOST
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dnl ####
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dnl # ACX_NONCANONICAL_TARGET
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dnl # Like underscored version, but AC_SUBST's.
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AC_DEFUN([ACX_NONCANONICAL_TARGET],
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[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_TARGET]) []dnl
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AC_SUBST(target_noncanonical)
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]) []dnl # ACX_NONCANONICAL_TARGET
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dnl ####
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dnl # GCC_TOPLEV_SUBDIRS
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dnl # GCC & friends build 'build', 'host', and 'target' tools. These must
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dnl # be separated into three well-known subdirectories of the build directory:
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dnl # build_subdir, host_subdir, and target_subdir. The values are determined
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dnl # here so that they can (theoretically) be changed in the future. They
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dnl # were previously reproduced across many different files.
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dnl #
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dnl # This logic really amounts to very little with autoconf 2.13; it will
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dnl # amount to a lot more with autoconf 2.5x.
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AC_DEFUN([GCC_TOPLEV_SUBDIRS],
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[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_TARGET]) []dnl
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AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl
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# post-stage1 host modules use a different CC_FOR_BUILD so, in order to
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# have matching libraries, they should use host libraries: Makefile.tpl
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# arranges to pass --with-build-libsubdir=$(HOST_SUBDIR).
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# However, they still use the build modules, because the corresponding
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# host modules (e.g. bison) are only built for the host when bootstrap
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# finishes. So:
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# - build_subdir is where we find build modules, and never changes.
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# - build_libsubdir is where we find build libraries, and can be overridden.
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# Prefix 'build-' so this never conflicts with target_subdir.
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build_subdir="build-${build_noncanonical}"
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AC_ARG_WITH(build-libsubdir,
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[ --with-build-libsubdir=[DIR] Directory where to find libraries for build system],
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build_libsubdir="$withval",
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build_libsubdir="$build_subdir")
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# --srcdir=. covers the toplevel, while "test -d" covers the subdirectories
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if ( test $srcdir = . && test -d gcc ) \
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|| test -d $srcdir/../host-${host_noncanonical}; then
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host_subdir="host-${host_noncanonical}"
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else
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host_subdir=.
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fi
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# No prefix.
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target_subdir=${target_noncanonical}
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AC_SUBST([build_libsubdir]) []dnl
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AC_SUBST([build_subdir]) []dnl
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AC_SUBST([host_subdir]) []dnl
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AC_SUBST([target_subdir]) []dnl
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]) []dnl # GCC_TOPLEV_SUBDIRS
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####
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# _NCN_TOOL_PREFIXES: Some stuff that oughtta be done in AC_CANONICAL_SYSTEM
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# or AC_INIT.
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# These demand that AC_CANONICAL_SYSTEM be called beforehand.
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AC_DEFUN([_NCN_TOOL_PREFIXES],
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[ncn_tool_prefix=
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test -n "$host_alias" && ncn_tool_prefix=$host_alias-
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ncn_target_tool_prefix=
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test -n "$target_alias" && ncn_target_tool_prefix=$target_alias-
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]) []dnl # _NCN_TOOL_PREFIXES
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####
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# NCN_STRICT_CHECK_TOOLS(variable, progs-to-check-for,[value-if-not-found],[path])
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# Like plain AC_CHECK_TOOLS, but require prefix if build!=host.
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AC_DEFUN([NCN_STRICT_CHECK_TOOLS],
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[AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl
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for ncn_progname in $2; do
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if test -n "$ncn_tool_prefix"; then
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AC_CHECK_PROG([$1], [${ncn_tool_prefix}${ncn_progname}],
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[${ncn_tool_prefix}${ncn_progname}], , [$4])
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fi
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if test -z "$ac_cv_prog_$1" && test $build = $host ; then
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AC_CHECK_PROG([$1], [${ncn_progname}], [${ncn_progname}], , [$4])
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fi
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test -n "$ac_cv_prog_$1" && break
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done
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if test -z "$ac_cv_prog_$1" ; then
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ifelse([$3],[], [set dummy $2
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if test $build = $host ; then
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$1="[$]2"
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else
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$1="${ncn_tool_prefix}[$]2"
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fi], [$1="$3"])
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fi
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]) []dnl # NCN_STRICT_CHECK_TOOLS
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####
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# NCN_STRICT_CHECK_TARGET_TOOLS(variable, progs-to-check-for,[value-if-not-found],[path])
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# Like CVS Autoconf AC_CHECK_TARGET_TOOLS, but require prefix if build!=target.
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AC_DEFUN([NCN_STRICT_CHECK_TARGET_TOOLS],
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[AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl
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if test -n "$with_build_time_tools"; then
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for ncn_progname in $2; do
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AC_MSG_CHECKING([for ${ncn_progname} in $with_build_time_tools])
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if test -x $with_build_time_tools/${ncn_progname}; then
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ac_cv_prog_$1=$with_build_time_tools/${ncn_progname}
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AC_MSG_RESULT(yes)
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break
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else
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AC_MSG_RESULT(no)
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fi
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done
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fi
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if test -z "$ac_cv_prog_$1"; then
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for ncn_progname in $2; do
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if test -n "$ncn_target_tool_prefix"; then
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AC_CHECK_PROG([$1], [${ncn_target_tool_prefix}${ncn_progname}],
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[${ncn_target_tool_prefix}${ncn_progname}], , [$4])
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fi
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if test -z "$ac_cv_prog_$1" && test $build = $target ; then
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AC_CHECK_PROG([$1], [${ncn_progname}], [${ncn_progname}], , [$4])
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fi
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test -n "$ac_cv_prog_$1" && break
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done
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fi
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if test -z "$ac_cv_prog_$1" ; then
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ifelse([$3],[], [set dummy $2
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if test $build = $target ; then
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$1="[$]2"
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else
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$1="${ncn_target_tool_prefix}[$]2"
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fi], [$1="$3"])
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fi
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]) []dnl # NCN_STRICT_CHECK_TARGET_TOOLS
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# Backported from Autoconf 2.5x; can go away when and if
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# we switch. Put the OS path separator in $PATH_SEPARATOR.
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AC_DEFUN([ACX_PATH_SEP], [
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# The user is always right.
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if test "${PATH_SEPARATOR+set}" != set; then
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echo "#! /bin/sh" >conf$$.sh
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echo "exit 0" >>conf$$.sh
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chmod +x conf$$.sh
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if (PATH="/nonexistent;."; conf$$.sh) >/dev/null 2>&1; then
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PATH_SEPARATOR=';'
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else
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PATH_SEPARATOR=:
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fi
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rm -f conf$$.sh
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fi
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])
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AC_DEFUN([ACX_TOOL_DIRS], [
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AC_REQUIRE([ACX_PATH_SEP])
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if test "x$exec_prefix" = xNONE; then
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if test "x$prefix" = xNONE; then
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gcc_cv_tool_prefix=$ac_default_prefix
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else
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gcc_cv_tool_prefix=$prefix
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fi
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else
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gcc_cv_tool_prefix=$exec_prefix
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fi
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# If there is no compiler in the tree, use the PATH only. In any
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# case, if there is no compiler in the tree nobody should use
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# AS_FOR_TARGET and LD_FOR_TARGET.
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if test x$host = x$build && test -f $srcdir/gcc/BASE-VER; then
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gcc_version=`cat $srcdir/gcc/BASE-VER`
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gcc_cv_tool_dirs="$gcc_cv_tool_prefix/libexec/gcc/$target_noncanonical/$gcc_version$PATH_SEPARATOR"
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gcc_cv_tool_dirs="$gcc_cv_tool_dirs$gcc_cv_tool_prefix/libexec/gcc/$target_noncanonical$PATH_SEPARATOR"
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gcc_cv_tool_dirs="$gcc_cv_tool_dirs/usr/lib/gcc/$target_noncanonical/$gcc_version$PATH_SEPARATOR"
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gcc_cv_tool_dirs="$gcc_cv_tool_dirs/usr/lib/gcc/$target_noncanonical$PATH_SEPARATOR"
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gcc_cv_tool_dirs="$gcc_cv_tool_dirs$gcc_cv_tool_prefix/$target_noncanonical/bin/$target_noncanonical/$gcc_version$PATH_SEPARATOR"
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gcc_cv_tool_dirs="$gcc_cv_tool_dirs$gcc_cv_tool_prefix/$target_noncanonical/bin$PATH_SEPARATOR"
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else
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gcc_cv_tool_dirs=
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fi
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if test x$build = x$target && test -n "$md_exec_prefix"; then
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gcc_cv_tool_dirs="$gcc_cv_tool_dirs$md_exec_prefix$PATH_SEPARATOR"
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fi
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]) []dnl # ACX_TOOL_DIRS
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# ACX_HAVE_GCC_FOR_TARGET
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# Check if the variable GCC_FOR_TARGET really points to a GCC binary.
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AC_DEFUN([ACX_HAVE_GCC_FOR_TARGET], [
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cat > conftest.c << \EOF
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#ifdef __GNUC__
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gcc_yay;
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#endif
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EOF
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if ($GCC_FOR_TARGET -E conftest.c | grep gcc_yay) > /dev/null 2>&1; then
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have_gcc_for_target=yes
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else
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GCC_FOR_TARGET=${ncn_target_tool_prefix}gcc
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have_gcc_for_target=no
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fi
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rm conftest.c
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])
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# ACX_CHECK_INSTALLED_TARGET_TOOL(VAR, PROG)
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# Searching for installed target binutils. We need to take extra care,
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# else we may find the wrong assembler, linker, etc., and lose.
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#
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# First try --with-build-time-tools, if specified.
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#
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# For build != host, we ask the installed GCC for the name of the tool it
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# uses, and accept it if it is an absolute path. This is because the
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# only good choice for a compiler is the same GCC version that is being
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# installed (or we couldn't make target libraries), and we assume that
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# on the host system we'll have not only the same GCC version, but also
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# the same binutils version.
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#
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# For build == host, search the same directories that the installed
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# compiler will search. We used to do this for the assembler, linker,
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# and nm only; for simplicity of configuration, however, we extend this
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# criterion to tools (such as ar and ranlib) that are never invoked by
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# the compiler, to avoid mismatches.
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#
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# Also note we have to check MD_EXEC_PREFIX before checking the user's path
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# if build == target. This makes the most sense only when bootstrapping,
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# but we also do so when build != host. In this case, we hope that the
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# build and host systems will have similar contents of MD_EXEC_PREFIX.
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#
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# If we do not find a suitable binary, then try the user's path.
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AC_DEFUN([ACX_CHECK_INSTALLED_TARGET_TOOL], [
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AC_REQUIRE([ACX_TOOL_DIRS])
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AC_REQUIRE([ACX_HAVE_GCC_FOR_TARGET])
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if test -z "$ac_cv_path_$1" ; then
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if test -n "$with_build_time_tools"; then
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AC_MSG_CHECKING([for $2 in $with_build_time_tools])
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if test -x $with_build_time_tools/$2; then
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$1=`cd $with_build_time_tools && pwd`/$2
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ac_cv_path_$1=[$]$1
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AC_MSG_RESULT([$ac_cv_path_$1])
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else
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AC_MSG_RESULT(no)
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fi
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elif test $build != $host && test $have_gcc_for_target = yes; then
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$1=`$GCC_FOR_TARGET --print-prog-name=$2`
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test [$]$1=$2 && $1=
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ac_cv_path_$1=[$]$1
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fi
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fi
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if test -z "$ac_cv_path_$1" ; then
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AC_PATH_PROG([$1], [$2], [], [$gcc_cv_tool_dirs])
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fi
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if test -z "$ac_cv_path_$1" ; then
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NCN_STRICT_CHECK_TARGET_TOOLS([$1], [$2])
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else
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$1=$ac_cv_path_$1
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fi
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]) []dnl # ACX_CHECK_INSTALLED_TARGET_TOOL
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###
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# AC_PROG_CPP_WERROR
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# Used for autoconf 2.5x to force AC_PREPROC_IFELSE to reject code which
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# triggers warnings from the preprocessor. Will be in autoconf 2.58.
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# For now, using this also overrides header checks to use only the
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# preprocessor (matches 2.13 behavior; matching 2.58's behavior is a
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# bit harder from here).
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# Eventually autoconf will default to checking headers with the compiler
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# instead, and we'll have to do this differently.
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AC_DEFUN([AC_PROG_CPP_WERROR],
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[AC_REQUIRE([AC_PROG_CPP])dnl
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m4_define([AC_CHECK_HEADER],m4_defn([_AC_CHECK_HEADER_OLD]))
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ac_c_preproc_warn_flag=yes])# AC_PROG_CPP_WERROR
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# Test for GNAT.
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# We require the gnatbind program, and a compiler driver that
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# understands Ada. We use the user's CC setting, already found.
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#
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# Sets the shell variable have_gnat to yes or no as appropriate, and
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# substitutes GNATBIND.
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AC_DEFUN([ACX_PROG_GNAT],
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[AC_REQUIRE([AC_CHECK_TOOL_PREFIX])
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AC_REQUIRE([AC_PROG_CC])
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AC_CHECK_TOOL(GNATBIND, gnatbind, no)
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AC_CACHE_CHECK([whether compiler driver understands Ada],
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acx_cv_cc_gcc_supports_ada,
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[cat >conftest.adb <<EOF
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procedure conftest is begin null; end conftest;
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EOF
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acx_cv_cc_gcc_supports_ada=no
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# There is a bug in old released versions of GCC which causes the
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# driver to exit successfully when the appropriate language module
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# has not been installed. This is fixed in 2.95.4, 3.0.2, and 3.1.
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# Therefore we must check for the error message as well as an
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# unsuccessful exit.
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# Other compilers, like HP Tru64 UNIX cc, exit successfully when
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# given a .adb file, but produce no object file. So we must check
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# if an object file was really produced to guard against this.
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errors=`(${CC} -c conftest.adb) 2>&1 || echo failure`
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if test x"$errors" = x && test -f conftest.$ac_objext; then
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acx_cv_cc_gcc_supports_ada=yes
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fi
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rm -f conftest.*])
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if test x$GNATBIND != xno && test x$acx_cv_cc_gcc_supports_ada != xno; then
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have_gnat=yes
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else
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have_gnat=no
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fi
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])
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dnl 'make compare' can be significantly faster, if cmp itself can
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dnl skip bytes instead of using tail. The test being performed is
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dnl "if cmp --ignore-initial=2 t1 t2 && ! cmp --ignore-initial=1 t1 t2"
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dnl but we need to sink errors and handle broken shells. We also test
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dnl for the parameter format "cmp file1 file2 skip1 skip2" which is
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dnl accepted by cmp on some systems.
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AC_DEFUN([ACX_PROG_CMP_IGNORE_INITIAL],
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[AC_CACHE_CHECK([how to compare bootstrapped objects], gcc_cv_prog_cmp_skip,
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[ echo abfoo >t1
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echo cdfoo >t2
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gcc_cv_prog_cmp_skip='tail +16c $$f1 > tmp-foo1; tail +16c $$f2 > tmp-foo2; cmp tmp-foo1 tmp-foo2'
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if cmp t1 t2 2 2 > /dev/null 2>&1; then
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if cmp t1 t2 1 1 > /dev/null 2>&1; then
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:
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else
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gcc_cv_prog_cmp_skip='cmp $$f1 $$f2 16 16'
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fi
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fi
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if cmp --ignore-initial=2 t1 t2 > /dev/null 2>&1; then
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if cmp --ignore-initial=1 t1 t2 > /dev/null 2>&1; then
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:
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else
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gcc_cv_prog_cmp_skip='cmp --ignore-initial=16 $$f1 $$f2'
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fi
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fi
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rm t1 t2
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])
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do_compare="$gcc_cv_prog_cmp_skip"
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AC_SUBST(do_compare)
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])
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dnl See whether we can include both string.h and strings.h.
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AC_DEFUN([ACX_HEADER_STRING],
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[AC_CACHE_CHECK([whether string.h and strings.h may both be included],
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gcc_cv_header_string,
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[AC_TRY_COMPILE([#include <string.h>
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#include <strings.h>], , gcc_cv_header_string=yes, gcc_cv_header_string=no)])
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if test $gcc_cv_header_string = yes; then
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AC_DEFINE(STRING_WITH_STRINGS, 1, [Define if you can safely include both <string.h> and <strings.h>.])
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fi
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])
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dnl See if stdbool.h properly defines bool and true/false.
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dnl Check whether _Bool is built-in.
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AC_DEFUN([ACX_HEADER_STDBOOL],
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[AC_CACHE_CHECK([for working stdbool.h],
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ac_cv_header_stdbool_h,
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[AC_TRY_COMPILE([#include <stdbool.h>],
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[bool foo = false;],
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|
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
|
|
if expr "x[$]$2" : "x/" > /dev/null; then
|
|
# We already found the complete path
|
|
AC_MSG_RESULT(pre-installed in `dirname [$]$2`)
|
|
else
|
|
# Canadian cross, just use what we found
|
|
AC_MSG_RESULT(pre-installed)
|
|
fi
|
|
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)/$4'
|
|
AC_MSG_RESULT(just compiled)
|
|
el])if expr "x[$]$2" : "x/" > /dev/null; then
|
|
# We already found the complete path
|
|
AC_MSG_RESULT(pre-installed in `dirname [$]$2`)
|
|
elif test "x$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
|
|
AC_SUBST($2)])
|