[PATCH] Add cross compile to top level configuration file

Jerone Young
2007-10-15T19:12:13Z

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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>

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diff --git a/configure b/configure
--- a/configure
+++ b/configure
@@ -3,32 +3,30 @@ 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
+qemu_cc=
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
@@ -53,6 +51,12 @@ while [[ "$1" = -* ]]; do
--disable-gcc-check)
disable_gcc_check=1
;;
+ --arch)
+ arch="$arg"
+ ;;
+ --cross-prefix)
+ cross_prefix="$arg"
+ ;;
--help)
usage
;;
@@ -62,39 +66,71 @@ while [[ "$1" = -* ]]; do
esac
done

-if [[ -z "$qemu_cc" ]]; then
- echo "$0: cannot locate gcc 3.x. please install it or specify with --qemu-cc"
- exit 1
+
+# if cc is not specified on the command line
+# look for gcc version 3.x
+if [[ -z "$qemu_cc" ]] && [[ -z "$cross_prefix" ]]; then
+ #check for a gcc 3.x version on the system
+ cc_check=$(ls /usr/bin/gcc3* /usr/bin/gcc-3* 2>/dev/null | tail -n1)
+ #prefer gcc if its version is 3.* ( over a compat-gcc )
+ gcc_check=$(gcc -v 2>&1 | grep -q 'gcc *version *3\.[2-4]\.[0-9]')
+ if [[ -n "$cc_check" ]] && [[ -z "$gcc_check" ]] ; then
+ cc=$cc_check
+ fi
fi

+#if qemu_cc is specfied on the command line, set cc=$qemu_cc
+if [[ -n "$qemu_cc" ]] && [[ -z "$cross_prefix" ]]; then
+ cc=$qemu_cc
+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" \
+#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" \
--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=$cross_prefix$cc
EOF
-

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