# 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.
]) []dnl # _NCN_TOOL_PREFIXES
####
-# NCN_CHECK_TARGET_TOOL(variable, prog-to-check-for,[value-if-not-found],[path])
-# Like AC_CHECK_TOOL, but tries a prefix of the target, not the host.
-# Code is pretty much lifted from autoconf2.53.
+# 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_CHECK_TARGET_TOOL],
+AC_DEFUN([NCN_STRICT_CHECK_TOOLS],
[AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl
-if test -n "$ncn_target_tool_prefix"; then
- AC_CHECK_PROG([$1], [${ncn_target_tool_prefix}$2],
- [${ncn_target_tool_prefix}$2], , [$4])
-fi
+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
- ncn_cv_$1=$$1
- AC_CHECK_PROG([ncn_cv_$1], [$2], [$2], [$3], [$4])
- $1=$ncn_cv_$1
-else
- $1="$ac_cv_prog_$1"
+ ifelse([$3],[], [set dummy $2
+ if test $build = $host ; then
+ $1="[$]2"
+ else
+ $1="${ncn_tool_prefix}[$]2"
+ fi], [$1="$3"])
fi
-]) []dnl # NCN_CHECK_TARGET_TOOL
-
+]) []dnl # NCN_STRICT_CHECK_TOOLS
####
-# NCN_STRICT_CHECK_TOOL(variable, prog-to-check-for,[value-if-not-found],[path])
-# Like AC_CHECK_TOOL, but requires the prefix if build!=host.
+# NCN_STRICT_CHECK_TARGET_TOOLS(variable, progs-to-check-for,[value-if-not-found],[path])
+# Like CVS Autoconf AC_CHECK_TARGET_TOOLS, but require prefix if build!=target.
-AC_DEFUN([NCN_STRICT_CHECK_TOOL],
+AC_DEFUN([NCN_STRICT_CHECK_TARGET_TOOLS],
[AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl
-if test -n "$ncn_tool_prefix"; then
- AC_CHECK_PROG([$1], [${ncn_tool_prefix}$2],
- [${ncn_tool_prefix}$2], , [$4])
-fi
+for ncn_progname in $2; do
+ if test -n "$ncn_target_tool_prefix"; then
+ AC_CHECK_PROG([$1], [${ncn_target_tool_prefix}${ncn_progname}],
+ [${ncn_target_tool_prefix}${ncn_progname}], , [$4])
+ fi
+ if test -z "$ac_cv_prog_$1" && test $build = $target ; then
+ AC_CHECK_PROG([$1], [${ncn_progname}], [${ncn_progname}], , [$4])
+ fi
+ test -n "$ac_cv_prog_$1" && break
+done
+
if test -z "$ac_cv_prog_$1" ; then
- if test $build = $host ; then
- ncn_cv_$1=$$1
- AC_CHECK_PROG([ncn_cv_$1], [$2], [$2], [ifelse([$3],[],[$2],[$3])], [$4])
- $1=$ncn_cv_$1
+ ifelse([$3],[], [set dummy $2
+ if test $build = $target ; then
+ $1="[$]2"
else
- $1="ifelse([$3],[],[${ncn_tool_prefix}$2],[$3])"
- fi
-else
- $1="$ac_cv_prog_$1"
+ $1="${ncn_target_tool_prefix}[$]2"
+ fi], [$1="$3"])
fi
-]) []dnl # NCN_STRICT_CHECK_TOOL
+]) []dnl # NCN_STRICT_CHECK_TARGET_TOOLS
+###
+# AC_PROG_CPP_WERROR
+# Used for autoconf 2.5x to force AC_PREPROC_IFELSE to reject code which
+# triggers warnings from the preprocessor. Will be in autoconf 2.58.
+# For now, using this also overrides header checks to use only the
+# preprocessor (matches 2.13 behavior; matching 2.58's behavior is a
+# bit harder from here).
+# Eventually autoconf will default to checking headers with the compiler
+# instead, and we'll have to do this differently.
-####
-# NCN_STRICT_CHECK_TARGET_TOOL(variable, prog-to-check-for,[value-if-not-found],[path])
-# Like NCN_CHECK_TARGET_TOOL, but requires the prefix if build!=target.
+AC_DEFUN([AC_PROG_CPP_WERROR],
+[AC_REQUIRE([AC_PROG_CPP])dnl
+m4_define([AC_CHECK_HEADER],m4_defn([_AC_CHECK_HEADER_OLD]))
+ac_c_preproc_warn_flag=yes])# AC_PROG_CPP_WERROR
-AC_DEFUN([NCN_STRICT_CHECK_TARGET_TOOL],
-[AC_REQUIRE([_NCN_TOOL_PREFIXES]) []dnl
-if test -n "$ncn_target_tool_prefix"; then
- AC_CHECK_PROG([$1], [${ncn_target_tool_prefix}$2],
- [${ncn_target_tool_prefix}$2], , [$4])
+# Test for GNAT.
+# We require the gnatbind program, and a compiler driver that
+# understands Ada. We use the user's CC setting, already found.
+#
+# Sets the shell variable have_gnat to yes or no as appropriate, and
+# substitutes GNATBIND.
+AC_DEFUN([ACX_PROG_GNAT],
+[AC_REQUIRE([AC_CHECK_TOOL_PREFIX])
+AC_REQUIRE([AC_PROG_CC])
+AC_CHECK_TOOL(GNATBIND, gnatbind, no)
+AC_CACHE_CHECK([whether compiler driver understands Ada],
+ acx_cv_cc_gcc_supports_ada,
+[cat >conftest.adb <<EOF
+procedure conftest is begin null; end conftest;
+EOF
+acx_cv_cc_gcc_supports_ada=no
+# There is a bug in old released versions of GCC which causes the
+# driver to exit successfully when the appropriate language module
+# has not been installed. This is fixed in 2.95.4, 3.0.2, and 3.1.
+# Therefore we must check for the error message as well as an
+# unsuccessful exit.
+# Other compilers, like HP Tru64 UNIX cc, exit successfully when
+# given a .adb file, but produce no object file. So we must check
+# if an object file was really produced to guard against this.
+errors=`(${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
-if test -z "$ac_cv_prog_$1" ; then
- if test $build = $target ; then
- ncn_cv_$1=$$1
- AC_CHECK_PROG([ncn_cv_$1], [$2], [$2], [ifelse([$3],[],[$2],[$3])], [$4])
- $1=$ncn_cv_$1
- else
- $1="ifelse([$3],[],[${ncn_target_tool_prefix}$2],[$3])"
+rm -f conftest.*])
+
+if test x$GNATBIND != xno && test x$acx_cv_cc_gcc_supports_ada != xno; then
+ have_gnat=yes
+else
+ have_gnat=no
+fi
+])
+
+dnl 'make compare' can be significantly faster, if cmp itself can
+dnl skip bytes instead of using tail. The test being performed is
+dnl "if cmp --ignore-initial=2 t1 t2 && ! cmp --ignore-initial=1 t1 t2"
+dnl but we need to sink errors and handle broken shells. We also test
+dnl for the parameter format "cmp file1 file2 skip1 skip2" which is
+dnl accepted by cmp on some systems.
+AC_DEFUN([ACX_PROG_CMP_IGNORE_INITIAL],
+[AC_CACHE_CHECK([how to compare bootstrapped objects], gcc_cv_prog_cmp_skip,
+[ echo abfoo >t1
+ echo cdfoo >t2
+ gcc_cv_prog_cmp_skip='tail +16c $$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
- $1="$ac_cv_prog_$1"
+ acx_cv_prog_LN=no
fi
-]) []dnl # NCN_STRICT_CHECK_TARGET_TOOL
+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
+])
+
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