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linux-user, bsd-user: disable on unsupported host architectures

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Safe signal handling around system calls is mandatory for user-mode
emulation, and requires a small piece of handwritten assembly code.
So refuse to compile unless the common-user/host subdirectory exists
for the host architecture that was detected or selected with --cpu.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2022-09-26 18:22:39 +02:00
parent 17780edd81
commit 473cd070b1
1 changed files with 23 additions and 17 deletions
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20
configure vendored
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@ -871,12 +871,16 @@ fi
default_target_list=""
mak_wilds=""
if [ -n "$host_arch" ] && [ -d "$source_path/common-user/host/$host_arch" ]; then
if [ "$linux_user" != no ]; then
if [ "$targetos" = linux ] && [ -n "$host_arch" ]; then
if [ "$targetos" = linux ]; then
linux_user=yes
elif [ "$linux_user" = yes ]; then
error_exit "linux-user not supported on this architecture"
fi
if [ "$linux_user" = "yes" ]; then
mak_wilds="${mak_wilds} $source_path/configs/targets/*-linux-user.mak"
fi
fi
if [ "$bsd_user" != no ]; then
if [ "$bsd_user" = "" ]; then
@ -885,16 +889,18 @@ if [ "$bsd_user" != no ]; then
if [ "$bsd_user" = yes ] && ! [ -d "$source_path/bsd-user/$targetos" ]; then
error_exit "bsd-user not supported on this host OS"
fi
if [ "$bsd_user" = "yes" ]; then
mak_wilds="${mak_wilds} $source_path/configs/targets/*-bsd-user.mak"
fi
fi
else
if [ "$linux_user" = yes ] || [ "$bsd_user" = yes ]; then
error_exit "user mode emulation not supported on this architecture"
fi
fi
if [ "$softmmu" = "yes" ]; then
mak_wilds="${mak_wilds} $source_path/configs/targets/*-softmmu.mak"
fi
if [ "$linux_user" = "yes" ]; then
mak_wilds="${mak_wilds} $source_path/configs/targets/*-linux-user.mak"
fi
if [ "$bsd_user" = "yes" ]; then
mak_wilds="${mak_wilds} $source_path/configs/targets/*-bsd-user.mak"
fi
for config in $mak_wilds; do
target="$(basename "$config" .mak)"