From b95bb5267e30b26d0831b6ba01d9bd25835d1046 Mon Sep 17 00:00:00 2001
From: Alan Modra <amodra@gmail.com>
Date: Wed, 12 Oct 2022 10:06:35 +1030
Subject: Re: Merge configure.ac from gcc project

Also copy over config.acx.m4, and regenerate.
---
 configure | 130 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 126 insertions(+), 4 deletions(-)

(limited to 'configure')

diff --git a/configure b/configure
index d7d9770..4d328b7 100755
--- a/configure
+++ b/configure
@@ -622,7 +622,6 @@ CC_FOR_TARGET
 RANLIB_PLUGIN_OPTION
 AR_PLUGIN_OPTION
 GDCFLAGS
-GDC
 READELF
 OTOOL
 OBJDUMP
@@ -709,6 +708,7 @@ PGO_BUILD_GEN_CFLAGS
 HAVE_CXX11_FOR_BUILD
 HAVE_CXX11
 do_compare
+GDC
 GNATMAKE
 GNATBIND
 ac_ct_CXX
@@ -5664,12 +5664,16 @@ else
   GNATMAKE="$ac_cv_prog_GNATMAKE"
 fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether compiler driver understands Ada" >&5
-$as_echo_n "checking whether compiler driver understands Ada... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether compiler driver understands Ada and is recent enough" >&5
+$as_echo_n "checking whether compiler driver understands Ada and is recent enough... " >&6; }
 if ${acx_cv_cc_gcc_supports_ada+:} false; then :
   $as_echo_n "(cached) " >&6
 else
   cat >conftest.adb <<EOF
+pragma Warnings (Off);
+with System.CRTL;
+pragma Warnings (On);
+use type System.CRTL.int64;
 procedure conftest is begin null; end conftest;
 EOF
 acx_cv_cc_gcc_supports_ada=no
@@ -5696,7 +5700,125 @@ else
   have_gnat=no
 fi
 
-ACX_PROG_GDC
+
+
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}gdc", so it can be a program name with args.
+set dummy ${ac_tool_prefix}gdc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_GDC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$GDC"; then
+  ac_cv_prog_GDC="$GDC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_GDC="${ac_tool_prefix}gdc"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+GDC=$ac_cv_prog_GDC
+if test -n "$GDC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $GDC" >&5
+$as_echo "$GDC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_GDC"; then
+  ac_ct_GDC=$GDC
+  # Extract the first word of "gdc", so it can be a program name with args.
+set dummy gdc; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_ac_ct_GDC+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_GDC"; then
+  ac_cv_prog_ac_ct_GDC="$ac_ct_GDC" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
+    ac_cv_prog_ac_ct_GDC="gdc"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+ac_ct_GDC=$ac_cv_prog_ac_ct_GDC
+if test -n "$ac_ct_GDC"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_GDC" >&5
+$as_echo "$ac_ct_GDC" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_GDC" = x; then
+    GDC="no"
+  else
+    case $cross_compiling:$ac_tool_warned in
+yes:)
+{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
+$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
+ac_tool_warned=yes ;;
+esac
+    GDC=$ac_ct_GDC
+  fi
+else
+  GDC="$ac_cv_prog_GDC"
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the D compiler works" >&5
+$as_echo_n "checking whether the D compiler works... " >&6; }
+if ${acx_cv_d_compiler_works+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat >conftest.d <<EOF
+module conftest; int main() { return 0; }
+EOF
+acx_cv_d_compiler_works=no
+if test "x$GDC" != xno; then
+  errors=`(${GDC} -c conftest.d) 2>&1 || echo failure`
+  if test x"$errors" = x && test -f conftest.$ac_objext; then
+    acx_cv_d_compiler_works=yes
+  fi
+  rm -f conftest.*
+fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $acx_cv_d_compiler_works" >&5
+$as_echo "$acx_cv_d_compiler_works" >&6; }
+if test "x$GDC" != xno && test x$acx_cv_d_compiler_works != xno; then
+  have_gdc=yes
+else
+  have_gdc=no
+fi
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking how to compare bootstrapped objects" >&5
 $as_echo_n "checking how to compare bootstrapped objects... " >&6; }
 if ${gcc_cv_prog_cmp_skip+:} false; then :
-- 
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