[PATCH] [RESEND] Add cross compile to top level configuration file

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

This new patch removes gcc 3.x checks, as well as adds environment
variables $CFLAGS & $LDFLAGS to include libs to qemu for cross compile.
I was going to add this in another patch. But they should probably go in
now.  So an example for power is to include zlib so before running
configure you do:
       export LDFLAGS="-L/home/public/zlib-ppc/lib"
       export CFLAGS="-I/home/public/zlib-ppc/include"


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

diff -r ff2feafadcac configure
--- a/configure	Fri Oct 12 07:35:25 2007 -0500
+++ b/configure	Mon Oct 15 21:52:51 2007 -0500
@@ -3,32 +3,29 @@ prefix=/usr/local
 prefix=/usr/local
 kerneldir=/lib/modules/$(uname -r)/build
 want_module=1
-qemu_cc=$(ls /usr/bin/gcc3* /usr/bin/gcc-3* 2>/dev/null | tail -n1)
+cc=gcc
 disable_gcc_check=
+cross_prefix=
+arch=`uname -m`
+target_exec=
 
 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 ($kerneldir)
-	    --qemu-cc="$qemu_cc"   compiler for qemu (needs gcc3.x) ($qemu_cc)
+	    --qemu-cc=CC           compiler for qemu (needs to be gcc 3.x)
+	                           Not valid if used with --cross-prefix	
 	    --disable-gcc-check    don't insist on gcc-3.x
-                                   - this will break running without kvm
+	                           CAUTION: using this option may break build
 EOF
     exit 1
 }
-
-
-# prefer gcc if its version is 3.* ( over a compat-gcc )
-# do it before parsing command line arguments to enable the user
-#    to specify a specific gcc he/she likes.
-if gcc -v 2>&1 | grep -q 'gcc *version *3\.[2-4]\.[0-9]'; then
-	qemu_cc=gcc
-fi
 
 while [[ "$1" = -* ]]; do
     opt="$1"; shift
@@ -48,11 +45,17 @@ while [[ "$1" = -* ]]; do
 	    want_module=
 	    ;;
 	--qemu-cc)
-	    qemu_cc="$arg"
+	    cc="$arg"
 	    ;;
 	--disable-gcc-check)
 	    disable_gcc_check=1
 	    ;;
+	--arch)
+	    arch="$arg"
+	    ;;
+	--cross-prefix)
+	    cross_prefix="$arg"
+            ;;
 	--help)
 	    usage
 	    ;;
@@ -62,39 +65,54 @@ while [[ "$1" = -* ]]; do
     esac
 done
 
-if [[ -z "$qemu_cc" ]]; then
-    echo "$0: cannot locate gcc 3.x. please install it or specify with --qemu-cc"
-    exit 1
-fi
 
+#set kenel directory
 libkvm_kerneldir="$kerneldir"
 if (( want_module )); then
     libkvm_kerneldir=$(readlink -f kernel)
 fi
 
-target_cpu() {
-    if [[ $(uname -m) = i?86 ]]; then
-	echo x86_64
-    else
-	uname -m
-    fi
-}
+#if arch is an x86 arch set to i386
+if [[ $arch = i?86 ]]; then
+  arch="i386"
+fi
 
-(cd user; ./configure --prefix="$prefix" --kerneldir="$libkvm_kerneldir")
-(cd qemu; ./configure --target-list=$(target_cpu)-softmmu --cc="$qemu_cc" \
-    --disable-kqemu --extra-cflags="-I $PWD/../user" \
-    --extra-ldflags="-L $PWD/../user" \
+#see if using a cross compiler or not
+qemu_opts=
+user_opts=
+if [[ -z $cross_prefix ]]; then
+    qemu_opts+=" --cc=$cc"
+    user_opts+=" --cc=$cc"
+else
+    qemu_opts+=" --cross-prefix=$cross_prefix"
+    user_opts+=" --cross-prefix=$cross_prefix"
+fi
+
+#set parameters compiling
+if [ "$arch" = "i386" -o "$arch" = "x86_64" ]; then
+    target_exec="x86_64-softmmu"
+    qemu_opts+=" --enable-alsa"
+fi
+
+qemudir=`pwd`/qemu
+
+#configure user dir
+(cd user; ./configure --prefix="$prefix" --kerneldir="$libkvm_kerneldir" \
+          $user_opts --arch="$arch")
+(cd qemu; ./configure --target-list=$target_exec \
+    --disable-kqemu --extra-cflags="-I $PWD/../user $CFLAGS" \
+    --extra-ldflags="-L $PWD/../user $LDFLAGS" \
     --enable-kvm --kernel-path="$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=$cross_prefix$cc
 EOF
-


On Mon, 2007-10-15 at 15:51 -0500, Anthony Liguori wrote:
> Jerone Young wrote:
> > On Mon, 2007-10-15 at 15:13 -0500, Anthony Liguori wrote:
> >   
> >> Jerone Young wrote:
> >>     
> >>> This patch is an improved version of patches sent last week to enable
> >>> the top level configuration file for cross compile. This currently
> >>> allows x86 & x86-64 to cross compile. But will soon be sending patches
> >>> for powerpc embedded once this is accepted. This patches to latest git
> >>> and is in git format ;-)
> >>>
> >>> Signed-off-by: Jerone Young <jyoung5-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org>
> >>>   
> >>> ------------------------------------------------------------------------
> >>>       
> >> Why are you only passing --enable-alsa only x86?
> >>     
> >
> > Because for our powerpc stuff we actually want different options. ALSA
> > is not a dependency we want.
> >   
> 
> Well, you don't want the dependency, but does that mean noone will ever 
> want the dependency on anything but x86?
> 
> I'm curious why --enable-alsa is here in the first place.  QEMU will use 
> SDL audio by default.  Perhaps Avi can shed light on why added in the 
> first place?
> 
> Regards,
> 
> Anthony Liguori
> 
> 
> >>> +fi
> >>> +
> >>> +qemudir=`pwd`/qemu
> >>> +
> >>> +#configure user dir
> >>> +(cd user; ./configure --prefix="$prefix" --kerneldir="$libkvm_kerneldir" \
> >>> +          $user_opts --arch="$arch")
> >>> +(cd qemu; ./configure --target-list=$target_exec \
> >>>      --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"
> >>>   
> >>>       
> >> I don't think this is right.  You're using two different --cpu options 
> >> for i386 and x86_64.  There really shouldn't be a --cpu option at all 
> >> for x86.
> >>     
> >
> > So the --cpu option is actually a hidden option in qemu & is not on the
> > qemu help page .. who know why it isn't but the it's in the code.
> >
> > It makes since though that if you are going to specify cross-prefix=
> > then there is little reason to specify the cpu on the qemu line. As it
> > should detect everything from cross compiler.
> >
> > I'll test this out and send a new patch with the 2 changes.
> >
> >   
> >> Regards,
> >>
> >> Anthony Liguori
> >>
> >>     
> >>>  )
> >>>  
> >>>  
> >>> -
> >>>  cat <<EOF > config.mak
> >>> +ARCH=$arch
> >>>  PREFIX=$prefix
> >>>  KERNELDIR=$kerneldir
> >>>  WANT_MODULE=$want_module
> >>> +CC=$cross_prefix$cc
> >>>  EOF
> >>> -
> >>>       
> >>     
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> >>>
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> >>> https://lists.sourceforge.net/lists/listinfo/kvm-devel
> >>>       
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> >>     
> >
> >
> >   
> 
> 
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