[PATCH] Stop requiring GCC3 for QEMU

[PATCH] Stop requiring GCC3 for QEMU

[Anthony Liguori]

KVM always configures QEMU to only build the required targets.  Recently,
target-i386 converted to TCG completely which means it no longer needs GCC-3.
ia64 and PowerPC have never needed GCC-3 AFAIK so let's disable the gcc check
in QEMU's configure and build with GCC4.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

diff --git a/configure b/configure
index 218b414..902e769 100755
--- a/configure
+++ b/configure
@@ -6,7 +6,6 @@ cc=gcc
 ld=ld
 objcopy=objcopy
 want_module=1
-qemu_cc=
 qemu_cflags=
 qemu_ldflags=
 qemu_opts=
@@ -24,7 +23,6 @@ usage() {
 	    --prefix=PREFIX        where to install things ($prefix)
 	    --with-patched-kernel  don't use external module
 	    --kerneldir=DIR        kernel build directory ($kerneldir)
-	    --qemu-cc=CC           specify compiler for qemu (must be gcc-3.x)
 	    --qemu-cflags=CFLAGS   CFLAGS to add to qemu configuration
 	    --qemu-ldflags=LDFLAGS LDFLAGS to add to qemu configuration
 
@@ -58,9 +56,6 @@ while [[ "$1" = -* ]]; do
 	--with-patched-kernel)
 	    want_module=
 	    ;;
-	--qemu-cc)
-	    qemu_cc="$arg"
-	    ;;
 	--qemu-cflags)
 	    qemu_cflags="$arg"
 	    ;;
@@ -115,11 +110,11 @@ fi
 #configure qemu
 (cd qemu; ./configure --target-list=$target_exec \
     --disable-kqemu \
+    --disable-gcc-check \
     --extra-cflags="-I $PWD/../libkvm $qemu_cflags" \
     --extra-ldflags="-L $PWD/../libkvm $qemu_ldflags" \
     --kernel-path="$libkvm_kerneldir" \
     --prefix="$prefix" \
-    ${qemu_cc:+"--cc=$qemu_cc"} \
     ${cross_prefix:+"--cross-prefix=$cross_prefix"} \
     ${cross_prefix:+"--cpu=$arch"} $qemu_opts
 ) || usage

Re: [PATCH] Stop requiring GCC3 for QEMU

[Avi Kivity]

Anthony Liguori wrote:
> KVM always configures QEMU to only build the required targets.  Recently,
> target-i386 converted to TCG completely which means it no longer needs GCC-3.
> ia64 and PowerPC have never needed GCC-3 AFAIK so let's disable the gcc check
> in QEMU's configure and build with GCC4.
>   

Applied, thanks.  This wasn't entirely unexpected.

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.