libpayload: Implement gcc wrappers for libpayload

libpayload uses a ton of flags and other scary gcc and ld options.  These
wrappers hide most of that from the user, so that using libpayload is as
easy as lpgcc -o hello hello.c

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3226 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

payloads/libpayload/bin/lpgcc

@@ -0,0 +1,104 @@
+#!/bin/sh
+## This file is part of the libpayload project.
+##
+## Copyright (C) 2008 Advanced Micro Devices, Inc.
+##
+## Redistribution and use in source and binary forms, with or without
+## modification, are permitted provided that the following conditions
+## are met:
+## 1. Redistributions of source code must retain the above copyright
+##    notice, this list of conditions and the following disclaimer.
+## 2. Redistributions in binary form must reproduce the above copyright
+##    notice, this list of conditions and the following disclaimer in the
+##    documentation and/or other materials provided with the distribution.
+## 3. The name of the author may not be used to endorse or promote products
+##    derived from this software without specific prior written permission.
+##
+## THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+## ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+## IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+## ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+## FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+## DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+## OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+## HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+## LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+## OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+## SUCH DAMAGE.
+
+# GCC wrapper for libpayload
+
+DEFAULT_PREFIX=/opt
+DEFAULT_CC=gcc
+
+BASE=`dirname $0`
+
+# This will set the _LIBDIR and _INCDIR variables used below
+. $BASE/lp.functions
+
+trygccoption() {
+	$DEFAULT_CC $1 -S -xc /dev/null -o .$$.tmp > /dev/null
+	rm -f .$$.tmp
+	return $?
+}
+
+DEBUGME=0
+DOLINK=1
+
+# This variable will contain the command line that the user wants to
+# pass to gas
+
+CMDLINE=
+
+# Process various flags that would change our behavior
+
+while [ $# -gt 0 ]; do
+	case $1 in
+	    -m32|-fno-stack-protector)
+		shift
+		continue
+		;;
+	    -m64)
+		error "Invalid option --64 - only 32 bit architectures are supported"
+		;;
+	    -c)
+		DOLINK=0
+		;;
+	    -debug-wrapper)
+		DEBUGME=1
+		shift
+		continue
+		;;
+	    *)
+		;;
+	esac
+
+	CMDLINE="$CMDLINE $1"
+	shift
+done
+
+_CFLAGS="-m32 -nostdinc -nostdlib -I$_INCDIR"
+
+# Check for the -fno-stack-protector silliness
+
+trygccoption -fno-stack-protector
+[ $? -eq 0 ] && _CFLAGS="$_CFLAGS -fno-stack-protector"
+
+_CFLAGS="$_CFLAGS -I`$DEFAULT_CC -m32 -print-search-dirs | head -n 1 | cut -d' ' -f2`include"
+
+_LDFLAGS="-Wl,-T,$_LIBDIR/libpayload.ldscript -static"
+
+if [ $DOLINK -eq 0 ]; then
+    if [ $DEBUGME -eq 1 ]; then
+    	echo "$DEFAULT_CC $_CFLAGS $CMDLINE"
+    fi
+
+    $DEFAULT_CC $_CFLAGS $CMDLINE
+else
+    _LIBGCC=`$DEFAULT_CC -m32 -print-libgcc-file-name`
+    if [ $DEBUGME -eq 1 ]; then
+	echo "$DEFAULT_CC $_CFLAGS $_LDFLAGS $CMDLINE $_LIBDIR/i386/head.o $_LIBDIR/libpayload.a $_LIBGCC"
+    fi
+
+    $DEFAULT_CC $_CFLAGS $_LDFLAGS $CMDLINE $_LIBDIR/i386/head.o $_LIBDIR/libpayload.a $_LIBGCC
+fi