193 lines
6.3 KiB
Plaintext
193 lines
6.3 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=${target_alias} ;;
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esac
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]) []dnl # _GCC_TOPLEV_NONCANONICAL_TARGET
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dnl ####
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dnl # GCC_TOPLEV_SUBDIRS
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dnl # GCC & friends build 'build', 'host', and 'target' tools. These must
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dnl # be separated into three well-known subdirectories of the build directory:
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dnl # build_subdir, host_subdir, and target_subdir. The values are determined
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dnl # here so that they can (theoretically) be changed in the future. They
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dnl # were previously reproduced across many different files.
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dnl #
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dnl # This logic really amounts to very little with autoconf 2.13; it will
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dnl # amount to a lot more with autoconf 2.5x.
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AC_DEFUN([GCC_TOPLEV_SUBDIRS],
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[AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_TARGET]) []dnl
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AC_REQUIRE([_GCC_TOPLEV_NONCANONICAL_BUILD]) []dnl
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# Prefix 'build-' so this never conflicts with target_subdir.
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build_subdir="build-${build_noncanonical}"
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# Not really a subdirectory, but here for completeness.
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host_subdir=.
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# No prefix.
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target_subdir=${target_noncanonical}
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AC_SUBST([build_subdir]) []dnl
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AC_SUBST([host_subdir]) []dnl
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AC_SUBST([target_subdir]) []dnl
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]) []dnl # GCC_TOPLEV_SUBDIRS
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####
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# _NCN_TOOL_PREFIXES: Some stuff that oughtta be done in AC_CANONICAL_SYSTEM
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# or AC_INIT.
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# These demand that AC_CANONICAL_SYSTEM be called beforehand.
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AC_DEFUN([_NCN_TOOL_PREFIXES],
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[ncn_tool_prefix=
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test -n "$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=$target_alias-
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]) []dnl # _NCN_TOOL_PREFIXES
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####
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# NCN_CHECK_TARGET_TOOL(variable, prog-to-check-for,[value-if-not-found],[path])
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# Like AC_CHECK_TOOL, but tries a prefix of the target, not the host.
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# Code is pretty much lifted from autoconf2.53.
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AC_DEFUN([NCN_CHECK_TARGET_TOOL],
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[AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl
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if test -n "$ncn_target_tool_prefix"; then
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AC_CHECK_PROG([$1], [${ncn_target_tool_prefix}$2],
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[${ncn_target_tool_prefix}$2], , [$4])
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fi
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if test -z "$ac_cv_prog_$1" ; then
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ncn_cv_$1=$$1
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AC_CHECK_PROG([ncn_cv_$1], [$2], [$2], [$3], [$4])
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$1=$ncn_cv_$1
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else
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$1="$ac_cv_prog_$1"
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fi
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]) []dnl # NCN_CHECK_TARGET_TOOL
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####
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# NCN_STRICT_CHECK_TOOL(variable, prog-to-check-for,[value-if-not-found],[path])
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# Like AC_CHECK_TOOL, but requires the prefix if build!=host.
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AC_DEFUN([NCN_STRICT_CHECK_TOOL],
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[AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl
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if test -n "$ncn_tool_prefix"; then
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AC_CHECK_PROG([$1], [${ncn_tool_prefix}$2],
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[${ncn_tool_prefix}$2], , [$4])
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fi
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if test -z "$ac_cv_prog_$1" ; then
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if test $build = $host ; then
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ncn_cv_$1=$$1
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AC_CHECK_PROG([ncn_cv_$1], [$2], [$2], [ifelse([$3],[],[$2],[$3])], [$4])
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$1=$ncn_cv_$1
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else
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$1="ifelse([$3],[],[${ncn_tool_prefix}$2],[$3])"
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fi
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else
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$1="$ac_cv_prog_$1"
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fi
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]) []dnl # NCN_STRICT_CHECK_TOOL
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####
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# NCN_STRICT_CHECK_TARGET_TOOL(variable, prog-to-check-for,[value-if-not-found],[path])
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# Like NCN_CHECK_TARGET_TOOL, but requires the prefix if build!=target.
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AC_DEFUN([NCN_STRICT_CHECK_TARGET_TOOL],
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[AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl
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if test -n "$ncn_target_tool_prefix"; then
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AC_CHECK_PROG([$1], [${ncn_target_tool_prefix}$2],
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[${ncn_target_tool_prefix}$2], , [$4])
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fi
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if test -z "$ac_cv_prog_$1" ; then
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if test $build = $target ; then
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ncn_cv_$1=$$1
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AC_CHECK_PROG([ncn_cv_$1], [$2], [$2], [ifelse([$3],[],[$2],[$3])], [$4])
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$1=$ncn_cv_$1
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else
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$1="ifelse([$3],[],[${ncn_target_tool_prefix}$2],[$3])"
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fi
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else
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$1="$ac_cv_prog_$1"
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fi
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]) []dnl # NCN_STRICT_CHECK_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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errors=`(${CC} -c conftest.adb) 2>&1 || echo failure`
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if test x"$errors" = x; then
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acx_cv_cc_gcc_supports_ada=yes
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break
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fi
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rm -f conftest.*])
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if test x$GNATBIND != xno && test x$acx_cv_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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