[PATCH 1/5] Enable top level configure script for cross compile

[Jerone Young <jyoung5-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>]

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This patch adds cross compile capability to the top level configure
script.

Signed-off-by: Jerone Young <jyoung5-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>


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diff -r f48e521e0add configure
--- a/configure	Wed Oct 03 21:00:03 2007 -0500
+++ b/configure	Thu Oct 04 14:59:16 2007 -0500
@@ -5,13 +5,17 @@ want_module=1
 want_module=1
 qemu_cc=$(ls /usr/bin/gcc3* /usr/bin/gcc-3* 2>/dev/null | tail -n1)
 disable_gcc_check=
+cross_prefix=
+arch=`uname -m`
+target_cpu=
 
 usage() {
     cat <<-EOF
 	Usage: $0 [options]
 
 	Options include:
-
+	    --arch=ARCH            architecture to compile for ($arch)
+	    --cross-prefix=PREFIX  prefix for cross compiler
 	    --prefix=PREFIX        where to install things ($prefix)
 	    --with-patched-kernel  don't use external module
 	    --kerneldir=DIR        kernel build directory ($kerneldir)
@@ -53,6 +57,15 @@ while [[ "$1" = -* ]]; do
 	--disable-gcc-check)
 	    disable_gcc_check=1
 	    ;;
+	--arch)
+	    arch="$arg"
+	    ;;
+	--cross-prefix)
+	    cross_prefix="$arg"
+            ;;
+	--target-cpu)
+	    target_cpu="$arg"
+	    ;; 
 	--help)
 	    usage
 	    ;;
@@ -62,7 +75,7 @@ while [[ "$1" = -* ]]; do
     esac
 done
 
-if [[ -z "$qemu_cc" ]]; then
+if [[ -z "$qemu_cc" ]] && [[ -z "$cross_prefix" ]]; then
     echo "$0: cannot locate gcc 3.x. please install it or specify with --qemu-cc"
     exit 1
 fi
@@ -72,29 +85,48 @@ if (( want_module )); then
     libkvm_kerneldir=$(readlink -f kernel)
 fi
 
-target_cpu() {
-    if [[ $(uname -m) = i?86 ]]; then
-	echo x86_64
-    else
-	uname -m
+#if arch is an x86 arch set to i386
+if [[ $arch = i?86 ]]; then
+  arch="i386"
+fi
+
+#see if using a cross compiler or not
+compiler=
+qemu_opts=
+user_opts=
+if [[ -z $cross_prefix ]]; then
+    qemu_opts+=" --cc=$qemu_cc"
+    user_opts+=" --cc=$qemu_cc"
+else
+    qemu_opts+=" --cross-prefix=$cross_prefix"
+    user_opts+=" --cross-prefix=$cross_prefix"
+fi
+
+#set parameters compiling
+if [ "$arch" = "i386" -o "$arch" = "x86_64" ]; then
+    if [[ -z $target_cpu ]]; then
+        target_cpu="x86_64"
     fi
-}
+    qemu_opts+=" --enable-alsa"
+fi
 
-(cd user; ./configure --prefix="$prefix" --kerneldir="$libkvm_kerneldir")
-(cd qemu; ./configure --target-list=$(target_cpu)-softmmu --cc="$qemu_cc" \
+#configure user dir
+(cd user; ./configure --prefix="$prefix" --kerneldir="$libkvm_kerneldir" \
+          $user_opts --arch="$arch")
+(cd qemu; ./configure --target-list=$target_cpu-softmmu \
     --disable-kqemu --extra-cflags="-I $PWD/../user" \
     --extra-ldflags="-L $PWD/../user" \
     --enable-kvm --kernel-path="$libkvm_kerneldir" \
-    --enable-alsa \
     ${disable_gcc_check:+"--disable-gcc-check"} \
-    --prefix="$prefix"
+    --prefix="$prefix" \
+    $qemu_opts --cpu="$arch"
 )
 
 
-
 cat <<EOF > config.mak
+ARCH=$arch
 PREFIX=$prefix
 KERNELDIR=$kerneldir
 WANT_MODULE=$want_module
+CC=$cross_prefix$qemu_cc
 EOF
-

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