motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 00:03:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

tcg/plugins: enable by default for most TCG builds

Browse source 
Aside from a minor bloat to file size the ability to have TCG plugins
has no real impact on performance unless a plugin is actively loaded.
Even then the libempty.so plugin shows only a minor degradation in
performance caused by the extra book keeping the TCG has to do to keep
track of instructions. As it's a useful feature lets just enable it by
default and reduce our testing matrix a little.

We need to move our linker testing earlier so we can be sure we can
enable the loader module required. As we have ruled out static &
plugins in an earlier patch we can also reduce the indent a little.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210709143005.1554-33-alex.bennee@linaro.org>
This commit is contained in:
Alex Bennée 2021-07-09 15:29:57 +01:00
parent 9b8e429851
commit ba4dd2aabc
3 changed files with 69 additions and 81 deletions
Download patch file Download diff file Expand all files Collapse all files

124
configure vendored
View file

@ -429,7 +429,7 @@ libxml2="auto"
debug_mutex="no"
libpmem="auto"
default_devices="true"
plugins="no"
plugins="$default_feature"
fuzzing="no"
rng_none="no"
secret_keyring="$default_feature"
@ -2209,6 +2209,8 @@ if test "$static" = "yes" ; then
fi
if test "$plugins" = "yes"; then
error_exit "static and plugins are mutually incompatible"
else
plugins="no"
fi
fi
@ -3102,6 +3104,69 @@ for drv in $audio_drv_list; do
esac
done
##########################################
# plugin linker support probe
if test "$plugins" != "no"; then
#########################################
# See if --dynamic-list is supported by the linker
ld_dynamic_list="no"
cat > $TMPTXT <<EOF
{
foo;
};
EOF
cat > $TMPC <<EOF
#include <stdio.h>
void foo(void);
void foo(void)
{
printf("foo\n");
}
int main(void)
{
foo();
return 0;
}
EOF
if compile_prog "" "-Wl,--dynamic-list=$TMPTXT" ; then
ld_dynamic_list="yes"
fi
#########################################
# See if -exported_symbols_list is supported by the linker
ld_exported_symbols_list="no"
cat > $TMPTXT <<EOF
_foo
EOF
if compile_prog "" "-Wl,-exported_symbols_list,$TMPTXT" ; then
ld_exported_symbols_list="yes"
fi
if test "$ld_dynamic_list" = "no" &&
test "$ld_exported_symbols_list" = "no" ; then
if test "$plugins" = "yes"; then
error_exit \
"Plugin support requires dynamic linking and specifying a set of symbols " \
"that are exported to plugins. Unfortunately your linker doesn't " \
"support the flag (--dynamic-list or -exported_symbols_list) used " \
"for this purpose."
else
plugins="no"
fi
else
plugins="yes"
fi
fi
##########################################
# glib support probe
@ -3110,7 +3175,7 @@ glib_modules=gthread-2.0
if test "$modules" = yes; then
glib_modules="$glib_modules gmodule-export-2.0"
fi
if test "$plugins" = yes; then
if test "$plugins" = "yes"; then
glib_modules="$glib_modules gmodule-2.0"
fi
@ -3935,61 +4000,6 @@ if compile_prog "" "" ; then
atomic64=yes
fi
#########################################
# See if --dynamic-list is supported by the linker
ld_dynamic_list="no"
if test "$static" = "no" ; then
cat > $TMPTXT <<EOF
{
foo;
};
EOF
cat > $TMPC <<EOF
#include <stdio.h>
void foo(void);
void foo(void)
{
printf("foo\n");
}
int main(void)
{
foo();
return 0;
}
EOF
if compile_prog "" "-Wl,--dynamic-list=$TMPTXT" ; then
ld_dynamic_list="yes"
fi
fi
#########################################
# See if -exported_symbols_list is supported by the linker
ld_exported_symbols_list="no"
if test "$static" = "no" ; then
cat > $TMPTXT <<EOF
_foo
EOF
if compile_prog "" "-Wl,-exported_symbols_list,$TMPTXT" ; then
ld_exported_symbols_list="yes"
fi
fi
if test "$plugins" = "yes" &&
test "$ld_dynamic_list" = "no" &&
test "$ld_exported_symbols_list" = "no" ; then
error_exit \
"Plugin support requires dynamic linking and specifying a set of symbols " \
"that are exported to plugins. Unfortunately your linker doesn't " \
"support the flag (--dynamic-list or -exported_symbols_list) used " \
"for this purpose."
fi
########################################
# check if getauxval is available.