[ kvm-Bugs-1807620 ] KVM's --disable-gcc-check doesn't work

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Bugs item #1807620, was opened at 2007-10-04 21:55
Message generated for change (Settings changed) made by amitshah
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Category: None
Group: None
>Status: Closed
Resolution: Fixed
Priority: 2
Private: No
Submitted By: Technologov (technologov)
Assigned to: Nobody/Anonymous (nobody)
Summary: KVM's --disable-gcc-check doesn't work

Initial Comment:
KVM's configure switch: "--disable-gcc-check" doesn't work.

This bug makes KVM very hard to compile on openSUSE 10.2/10.3, which, unlike Fedora doesn't have compat-gcc-34 package.

Here is the error:

alexey@suse103-home:~/Linstall/kvm-45> ./configure --disable-gcc-check
./configure: cannot locate gcc 3.x. please install it or specify with --qemu-cc

According to HELP, it should work:
alexey@suse103-home:~/Linstall/kvm-45> ./configure --help
Usage: ./configure [options]

Options include:

    --prefix=PREFIX        where to install things (/usr/local)
    --with-patched-kernel  don't use external module
    --kerneldir=DIR        kernel build directory (/lib/modules/2.6.22.5-31-bigsmp/build)
    --qemu-cc=""   compiler for qemu (needs gcc3.x) ()
    --disable-gcc-check    don't insist on gcc-3.x
                                   - this will break running without kvm


Host: openSUSE 10.3, 32-bit, Intel Core 2 CPU, KVM-45.

-Alexey Technologov

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Comment By: Anthony Liguori (aliguori)
Date: 2008-05-26 22:50

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I've confirmed that this has been fixed in the latest kvm-userspace git
tree.

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Comment By: Carlo Marcelo Arenas Belon (carenas)
Date: 2008-01-13 11:36

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$ tar -xvf /usr/portage/distfiles/kvm-47.tar.gz
$ cd kvm-47
$ ./configure --help | grep gcc
    --qemu-cc=CC           specify compiler for qemu (must be gcc-3.x)
    --disable-gcc-check    don't insist on gcc-3.x
$ gcc -v 2>&1 | grep "gcc version"
gcc version 4.1.2 (Gentoo 4.1.2 p1.0.1)
./configure --disable-gcc-check | grep gcc
C compiler        gcc
Host C compiler   gcc

can this be closed?

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Comment By: Technologov (technologov)
Date: 2007-11-08 13:24

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This bug is not fixed yet. Reopened.

./configure --help

needs to give proper help.

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Comment By: Technologov (technologov)
Date: 2007-10-21 20:22

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Itamar found a openSUSE 10.3-specific solution.

Itamar wrote:

This is a solution to the original problem with opensuse:

You can get gcc33 from the opensuse build service (this is the new
one-click-install)
http://software.opensuse.org/ymp/devel%3Atools%3Agcc/openSUSE_10.3/i586/
gcc33-3.3.3-41.6.i586.rpm.ymp

(or download specific rpm's from http://software.opensuse.org/search by
searching for gcc33).

-Itamar

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Comment By: Carlo Marcelo Arenas Belon (carenas)
Date: 2007-10-19 19:44

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Starting with kvm-47 all compiler detection is now being handled by QEMU
and works as explained in its documentation

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Comment By: Technologov (technologov)
Date: 2007-10-08 00:10

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Tested and it works.

Well, the bug is still there. But it's not in KVM now. It's in
documentation.

Bug reopened. Documentation must match functionality.

-Alexey

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Comment By: Carlo Marcelo Arenas Belon (carenas)
Date: 2007-10-07 22:56

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running (or compiling) qemu with gcc4 is not supported and will result in
broken CPU emulation and crashes if kvm is not used (either because of
-no-kvm or the module not being loaded).  if you are ok with that then add
"--qemu-cc=gcc" as a workaround for this bug

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Comment By: Avi Kivity (avik)
Date: 2007-10-07 16:49

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Even if you specify --disable-gcc-check, you still need to choose a C
compiler.  Qemu won't choose gcc 4 by default.

Specify --qemu-cc in addition to --disable-gcc-check.

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