Add new ld option: --print-memory-usage

ld/
	* NEWS: Mention new option.
	* lexsup.c (parse_args): Handle --print-memory-usage.
	(ld_options): Add --print-memory-usage.
	* ldmain.c (main): Call lang_print_memory_usage.
	* ldlex.h (enum option_values): Add OPTION_PRINT_MEMORY_USAGE.
	* ldlang.h: Add prototype of lang_print_memory_usage.
	* ldlang.c (lang_print_memory_size, lang_print_memory_usage): New
	functions.
	* ld.texinfo (Options): Document --print-memory-usage.
	* ld.h (args_type): Add print_memory_usage field.

ld/testsuite/
	* ld-scripts/print-memory-usage-1.t,
	* ld-scripts/print-memory-usage-1.s,
	* ld-scripts/print-memory-usage-1.l,
	* ld-scripts/print-memory-usage-2.t,
	* ld-scripts/print-memory-usage-2.l,
	* ld-scripts/print-memory-usage-3.s,
	* ld-scripts/print-memory-usage-3.t,
	* ld-scripts/print-memory-usage-3.l,
	* ld-scripts/print-memory-usage.t: New tests.
	* ld-scripts/print-memory-usage.exp: Run them.

ld/testsuite/ld-scripts/print-memory-usage-1.l

@@ -0,0 +1,3 @@
+Memory region         Used Size  Region Size  %age Used
+             ROM:          32 B         1 KB      3.12%
+             RAM:          32 B       256 KB      0.01%

ld/testsuite/ld-scripts/print-memory-usage-1.s

@@ -0,0 +1,8 @@
+	.text
+	.globl text_symbol
+text_symbol:
+	.space	32
+	.data
+	.globl data_symbol
+data_symbol:
+	.space	32

ld/testsuite/ld-scripts/print-memory-usage-1.t

@@ -0,0 +1,5 @@
+MEMORY
+{
+  ROM (RX) : ORIGIN = 0x1000, LENGTH = 1K
+  RAM (W)  : ORIGIN = 0x100000, LENGTH = 256K
+}

ld/testsuite/ld-scripts/print-memory-usage-2.l

@@ -0,0 +1 @@
+Memory region         Used Size  Region Size  %age Used

ld/testsuite/ld-scripts/print-memory-usage-2.t

@@ -0,0 +1,14 @@
+SECTIONS
+{
+  .text 0x1000 :
+  {
+    *(.text)
+    *(.pr)
+  }
+
+  .data :
+  {
+    *(.data)
+    *(.rw)
+  }
+}

ld/testsuite/ld-scripts/print-memory-usage-3.l

@@ -0,0 +1,3 @@
+Memory region         Used Size  Region Size  %age Used
+             ROM:        256 KB         1 MB     25.00%
+             RAM:          32 B         2 GB      0.00%

ld/testsuite/ld-scripts/print-memory-usage-3.s

@@ -0,0 +1,8 @@
+	.text
+	.globl text_symbol
+text_symbol:
+	.space	256*1024
+	.data
+	.globl data_symbol
+data_symbol:
+	.space	32

ld/testsuite/ld-scripts/print-memory-usage-3.t

@@ -0,0 +1,5 @@
+MEMORY
+{
+  ROM (RX) : ORIGIN = 0x100000, LENGTH = 1M
+  RAM (W)  : ORIGIN = 0x1000000, LENGTH = 2048M
+}

ld/testsuite/ld-scripts/print-memory-usage.exp

@@ -0,0 +1,69 @@
+# Test --print-memory-usage linker functionality
+# By Tristan Gingold, AdaCore
+#   Copyright (C) 2015 Free Software Foundation, Inc.
+#
+# This file is part of the GNU Binutils.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+# MA 02110-1301, USA.
+
+# Mips adds MIPS.abiflags section.
+# Spu, pdp11 memory is too small.
+# Tic30 needs a special linker script.
+# Tic54x interpret space values in bits.
+# XCOFF has garbage collection
+if { [istarget mips*-*-*]
+     || [istarget spu*-*-*]
+     || [istarget pdp11*-*-*]
+     || [istarget tic30*-*-*]
+     || [istarget tic54x*-*-*]
+     || [istarget *-*-aix*]
+     || [istarget *-*-xcoff*] } {
+    return
+}
+
+run_ld_link_tests {
+    {
+	"print-memory-usage-1"
+	"-T print-memory-usage-1.t -T print-memory-usage.t --print-memory-usage"
+	""
+	""
+	{ "print-memory-usage-1.s" }
+	{ { ld "print-memory-usage-1.l" } }
+	"print-memory-usage-1"
+    }
+
+    {
+	"print-memory-usage-2"
+	"-T print-memory-usage-2.t --print-memory-usage"
+	""
+	""
+	{ "print-memory-usage-1.s" }
+	{ { ld "print-memory-usage-2.l" } }
+	"print-memory-usage-2"
+    }
+
+    {
+	"print-memory-usage-3"
+	"-T print-memory-usage-3.t -T print-memory-usage.t --print-memory-usage"
+	""
+	""
+	{ "print-memory-usage-3.s" }
+	{ { ld "print-memory-usage-3.l" } }
+	"print-memory-usage-3"
+    }
+
+}
+

ld/testsuite/ld-scripts/print-memory-usage.t

@@ -0,0 +1,14 @@
+SECTIONS
+{
+  .text :
+  {
+    *(.text)
+    *(.pr)
+  }
+
+  .data :
+  {
+    *(.data)
+    *(.rw)
+  }
+}