From c20a0642333655311b1f5b6f78adfeb8ec9fe1d4 Mon Sep 17 00:00:00 2001
From: Alan Modra <amodra@gmail.com>
Date: Mon, 9 Nov 2015 15:17:05 +1030
Subject: [PATCH] Configury changes for obstack optimization

Provides defines used to determine whether glibc obstacks are
compatible.  Generally speaking, 32-bit targets won't need to use
obstack.o from libiberty if glibc is used, while 64-bit targets will,
until glibc gets the new obstack code.

libiberty/
	* configure.ac: Get size of size_t.
	* config.in: Regenerate.
	* configure: Regenerate.
---
 libiberty/ChangeLog    |  6 ++++++
 libiberty/config.in    |  3 +++
 libiberty/configure    | 34 ++++++++++++++++++++++++++++++++++
 libiberty/configure.ac |  1 +
 4 files changed, 44 insertions(+)

diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index 6d3b2950fc2..3b360a5c72f 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,9 @@
+2015-11-09  Alan Modra  <amodra@gmail.com>
+
+	* configure.ac: Check size of size_t.
+	* configure: Regenerate.
+	* config.in: Regenerate.
+
 2015-11-09  Alan Modra  <amodra@gmail.com>
 
 	* obstack.c (_obstack_newchunk): Silence -Wc++compat warning.
diff --git a/libiberty/config.in b/libiberty/config.in
index 0dedbf08e0f..1ff50c67f60 100644
--- a/libiberty/config.in
+++ b/libiberty/config.in
@@ -470,6 +470,9 @@
 /* The size of `long long', as computed by sizeof. */
 #undef SIZEOF_LONG_LONG
 
+/* The size of `size_t', as computed by sizeof. */
+#undef SIZEOF_SIZE_T
+
 /* Define if you know the direction of stack growth for your system; otherwise
    it will be automatically deduced at run-time. STACK_DIRECTION > 0 => grows
    toward higher addresses STACK_DIRECTION < 0 => grows toward lower addresses
diff --git a/libiberty/configure b/libiberty/configure
index 720dc5e80be..bde78ffd25d 100755
--- a/libiberty/configure
+++ b/libiberty/configure
@@ -5405,6 +5405,40 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
 
+# The cast to long int works around a bug in the HP C Compiler
+# version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
+# declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
+# This bug is HP SR number 8606223364.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking size of size_t" >&5
+$as_echo_n "checking size of size_t... " >&6; }
+if test "${ac_cv_sizeof_size_t+set}" = set; then :
+  $as_echo_n "(cached) " >&6
+else
+  if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (size_t))" "ac_cv_sizeof_size_t"        "$ac_includes_default"; then :
+
+else
+  if test "$ac_cv_type_size_t" = yes; then
+     { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+{ as_fn_set_status 77
+as_fn_error "cannot compute sizeof (size_t)
+See \`config.log' for more details." "$LINENO" 5; }; }
+   else
+     ac_cv_sizeof_size_t=0
+   fi
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_size_t" >&5
+$as_echo "$ac_cv_sizeof_size_t" >&6; }
+
+
+
+cat >>confdefs.h <<_ACEOF
+#define SIZEOF_SIZE_T $ac_cv_sizeof_size_t
+_ACEOF
+
+
 
 # Check for presense of long long
 ac_fn_c_check_type "$LINENO" "long long" "ac_cv_type_long_long" "$ac_includes_default"
diff --git a/libiberty/configure.ac b/libiberty/configure.ac
index e21e3aa5809..9d3f2988d5d 100644
--- a/libiberty/configure.ac
+++ b/libiberty/configure.ac
@@ -276,6 +276,7 @@ libiberty_AC_DECLARE_ERRNO
 # Determine sizes of some types.
 AC_CHECK_SIZEOF([int])
 AC_CHECK_SIZEOF([long])
+AC_CHECK_SIZEOF([size_t])
 
 # Check for presense of long long
 AC_CHECK_TYPE([long long],
-- 
2.30.2