----- Original Message -----
> From: "Philippe Mathieu-Daudé" <f4bug@amsat.org>
> To: "Paolo Bonzini" <pbonzini@redhat.com>, qemu-devel@nongnu.org
> Cc: "Anthony Liguori" <aliguori@us.ibm.com>
> Sent: Friday, July 14, 2017 7:24:29 AM
> Subject: Re: [Qemu-devel] [PULL 24/42] configure: add --disable-tcg configure option
>
> Hi Paolo,
>
> trying "./configure --disable-docs --disable-tcg" I get:
>
> CC x86_64-softmmu/exec.o
> qemu/exec.c: In function ‘breakpoint_invalidate’:
> qemu/exec.c:797:9: error: implicit declaration of function
> ‘tb_invalidate_phys_addr’ [-Werror=implicit-function-declaration]
> tb_invalidate_phys_addr(cpu->cpu_ases[asidx].as,
> ^~~~~~~~~~~~~~~~~~~~~~~
> qemu/exec.c:797:9: error: nested extern declaration of
> ‘tb_invalidate_phys_addr’ [-Werror=nested-externs]
> cc1: all warnings being treated as errors
> qemu/rules.mak:66: recipe for target 'exec.o' failed
> make[1]: *** [exec.o] Error 1
> Makefile:328: recipe for target 'subdir-x86_64-softmmu' failed
> make: *** [subdir-x86_64-softmmu] Error 2
>
> due to include/exec/exec-all.h:
>
> #if !defined(CONFIG_USER_ONLY) && defined(CONFIG_TCG)
> void tb_invalidate_phys_addr(AddressSpace *as, hwaddr addr);
> #else
This is introduced by Pranith's patch. I will respin my pull request.
Paolo
>
> On 07/05/2017 04:14 AM, Paolo Bonzini wrote:
> > This lets you build without TCG (hardware accelerationor qtest only). When
> > this flag is passed to configure, it will automatically filter out the
> > target
> > list to only those that support KVM or Xen or HAX.
> >
> > Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
> > Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> > ---
> > configure | 26 +++++++++++++++++++++-----
> > 1 file changed, 21 insertions(+), 5 deletions(-)
> >
> > diff --git a/configure b/configure
> > index ae69e96..806658c 100755
> > --- a/configure
> > +++ b/configure
> > @@ -232,7 +232,12 @@ supported_target() {
> > return 1
> > ;;
> > esac
> > - return 0
> > + test "$tcg" = "yes" && return 0
> > + supported_kvm_target "$1" && return 0
> > + supported_xen_target "$1" && return 0
> > + supported_hax_target "$1" && return 0
> > + print_error "TCG disabled, but hardware accelerator not available for
> > '$target'"
> > + return 1
> > }
> >
> > # default parameters
> > @@ -296,6 +301,7 @@ cap_ng=""
> > attr=""
> > libattr=""
> > xfs=""
> > +tcg="yes"
> >
> > vhost_net="no"
> > vhost_scsi="no"
> > @@ -1033,6 +1039,10 @@ for opt do
> > ;;
> > --enable-cap-ng) cap_ng="yes"
> > ;;
> > + --disable-tcg) tcg="no"
> > + ;;
> > + --enable-tcg) tcg="yes"
> > + ;;
> > --disable-spice) spice="no"
> > ;;
> > --enable-spice) spice="yes"
> > @@ -5195,7 +5205,6 @@ echo "module support $modules"
> > echo "host CPU $cpu"
> > echo "host big endian $bigendian"
> > echo "target list $target_list"
> > -echo "tcg debug enabled $debug_tcg"
> > echo "gprof enabled $gprof"
> > echo "sparse enabled $sparse"
> > echo "strip binaries $strip_opt"
> > @@ -5250,8 +5259,12 @@ echo "ATTR/XATTR support $attr"
> > echo "Install blobs $blobs"
> > echo "KVM support $kvm"
> > echo "HAX support $hax"
> > +echo "TCG support $tcg"
> > +if test "$tcg" = "yes" ; then
> > + echo "TCG debug enabled $debug_tcg"
> > + echo "TCG interpreter $tcg_interpreter"
> > +fi
> > echo "RDMA support $rdma"
> > -echo "TCG interpreter $tcg_interpreter"
> > echo "fdt support $fdt"
> > echo "preadv support $preadv"
> > echo "fdatasync $fdatasync"
> > @@ -5694,8 +5707,11 @@ fi
> > if test "$signalfd" = "yes" ; then
> > echo "CONFIG_SIGNALFD=y" >> $config_host_mak
> > fi
> > -if test "$tcg_interpreter" = "yes" ; then
> > - echo "CONFIG_TCG_INTERPRETER=y" >> $config_host_mak
> > +if test "$tcg" = "yes"; then
> > + echo "CONFIG_TCG=y" >> $config_host_mak
> > + if test "$tcg_interpreter" = "yes" ; then
> > + echo "CONFIG_TCG_INTERPRETER=y" >> $config_host_mak
> > + fi
> > fi
> > if test "$fdatasync" = "yes" ; then
> > echo "CONFIG_FDATASYNC=y" >> $config_host_mak
> >
>