libcpp, libdecnumber: configure and substitute AR

AIX supports "FAT" libraries containing 32 bit and 64 bit objects
(similar to Darwin), but commands for manipulating libraries do not
default to accept both 32 bit and 64 bit object files.  While updating
the AIX configuration to support building and running GCC as a 64 bit
application, I have encountered some build libraries that hard code
AR=ar instead of testing the environment.

This patch adds AR_CHECK_TOOL(AR, ar) to configure.ac for the two
libraries and updates Makefile.in to accept the substitution.

2020-05-23  David Edelsohn  <dje.gcc@gmail.com>

libcpp/ChangeLog:
	* Makefile.in (AR): Substitute @AR@.
	* configure.ac (CHECK_PROG AR): New.
	* configure: Regenerate.

libdecnumber/ChangeLog:
	* Makefile.in (AR): Substitute @AR@.
	* configure.ac (CHECK_PROG AR): New.
	* configure: Regenerate.

4 files changed, 101 insertions, 1 deletions

diff --git a/libdecnumber/ChangeLog b/libdecnumber/ChangeLog
index 75627e4825d..d9d276784f7 100644
--- a/libdecnumber/ChangeLog
+++ b/libdecnumber/ChangeLog
@@ -1,3 +1,9 @@
+2020-05-23  David Edelsohn  <dje.gcc@gmail.com>
+
+	* Makefile.in (AR): Substitute @AR@.
+	* configure.ac (CHECK_PROG AR): New.
+	* configure: Regenerate.
+
 2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* configure: Regenerated.
diff --git a/libdecnumber/Makefile.in b/libdecnumber/Makefile.in
index 9260b4849c8..9da028d7f2f 100644
--- a/libdecnumber/Makefile.in
+++ b/libdecnumber/Makefile.in
@@ -25,7 +25,7 @@ srcdir = @srcdir@
 top_builddir = .
 VPATH = @srcdir@
 INSTALL = @INSTALL@
-AR = ar
+AR = @AR@
 ARFLAGS = cru
 ACLOCAL = @ACLOCAL@
 AUTOCONF = @AUTOCONF@
diff --git a/libdecnumber/configure b/libdecnumber/configure
index c2c8040f5f3..577b250930c 100755
--- a/libdecnumber/configure
+++ b/libdecnumber/configure
@@ -651,6 +651,7 @@ WARN_CFLAGS
 AUTOHEADER
 AUTOCONF
 ACLOCAL
+AR
 RANLIB
 OBJEXT
 EXEEXT
@@ -3247,6 +3248,98 @@ else
   RANLIB="$ac_cv_prog_RANLIB"
 fi
 
+if test -n "$ac_tool_prefix"; then
+  # Extract the first word of "${ac_tool_prefix}ar", so it can be a program name with args.
+set dummy ${ac_tool_prefix}ar; 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_AR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$AR"; then
+  ac_cv_prog_AR="$AR" # Let the user override the test.
+else
+as_save_IFS=$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_AR="${ac_tool_prefix}ar"
+    $as_echo "$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
+AR=$ac_cv_prog_AR
+if test -n "$AR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $AR" >&5
+$as_echo "$AR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+fi
+if test -z "$ac_cv_prog_AR"; then
+  ac_ct_AR=$AR
+  # Extract the first word of "ar", so it can be a program name with args.
+set dummy ar; 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_AR+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$ac_ct_AR"; then
+  ac_cv_prog_ac_ct_AR="$ac_ct_AR" # Let the user override the test.
+else
+as_save_IFS=$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_AR="ar"
+    $as_echo "$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_AR=$ac_cv_prog_ac_ct_AR
+if test -n "$ac_ct_AR"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AR" >&5
+$as_echo "$ac_ct_AR" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+  if test "x$ac_ct_AR" = x; then
+    AR=""
+  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
+    AR=$ac_ct_AR
+  fi
+else
+  AR="$ac_cv_prog_AR"
+fi
+
 
 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
 for ac_prog in aclocal
diff --git a/libdecnumber/configure.ac b/libdecnumber/configure.ac
index de7e0088ceb..ae475a02c23 100644
--- a/libdecnumber/configure.ac
+++ b/libdecnumber/configure.ac
@@ -28,6 +28,7 @@ AC_CONFIG_AUX_DIR(..)
 AC_PROG_MAKE_SET
 AC_PROG_CC
 AC_PROG_RANLIB
+AC_CHECK_TOOL(AR, ar)
 
 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
 AC_CHECK_PROGS([ACLOCAL], [aclocal], [$MISSING aclocal])