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authorFam Zheng <famz@redhat.com>2014-02-10 14:48:57 +0800
committerPaolo Bonzini <pbonzini@redhat.com>2014-02-20 13:14:18 +0100
commite26110cfc67d48331a76e9b1e6f7fed7569e1ab3 (patch)
tree9ac70ad405cdf18189017345ee184f268510db3b /configure
parent17969268f5938ae1d7f3dedbd73e507badb6146d (diff)
module: implement module loading
This patch adds loading, stamp checking and initialization of modules. The init function of dynamic module is no longer directly called as __attribute__((constructor)) in static linked version, it is called only after passed the checking of presense of stamp symbol: qemu_stamp_$RELEASEHASH where $RELEASEHASH is generated by hashing version strings and content of configure script. With this, modules built from a different tree/version/configure will not be loaded. The module loading code requires gmodule-2.0. Modules are searched under - CONFIG_MODDIR - executable folder (to allow running qemu-{img,io} in the build directory) - ../ of executable folder (to allow running system emulator in the build directory) Modules are linked under their subdir respectively, then copied to top level of build directory for above convinience, e.g.: $(BUILD_DIR)/block/curl.so -> $(BUILD_DIR)/block-curl.so Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'configure')
-rwxr-xr-xconfigure42
1 files changed, 33 insertions, 9 deletions
diff --git a/configure b/configure
index e3bc04eb19..136a8f0b1b 100755
--- a/configure
+++ b/configure
@@ -1137,7 +1137,7 @@ Advanced options (experts only):
--libdir=PATH install libraries in PATH
--sysconfdir=PATH install config in PATH$confsuffix
--localstatedir=PATH install local state in PATH (set at runtime on win32)
- --with-confsuffix=SUFFIX suffix for QEMU data inside datadir and sysconfdir [$confsuffix]
+ --with-confsuffix=SUFFIX suffix for QEMU data inside datadir/libdir/sysconfdir [$confsuffix]
--enable-modules enable modules support
--enable-debug-tcg enable TCG debugging
--disable-debug-tcg disable TCG debugging (default)
@@ -2362,14 +2362,32 @@ if test "$mingw32" = yes; then
else
glib_req_ver=2.12
fi
-if $pkg_config --atleast-version=$glib_req_ver gthread-2.0; then
- glib_cflags=`$pkg_config --cflags gthread-2.0`
- glib_libs=`$pkg_config --libs gthread-2.0`
- CFLAGS="$glib_cflags $CFLAGS"
- LIBS="$glib_libs $LIBS"
- libs_qga="$glib_libs $libs_qga"
-else
- error_exit "glib-$glib_req_ver required to compile QEMU"
+
+for i in gthread-2.0 gmodule-2.0; do
+ if $pkg_config --atleast-version=$glib_req_ver $i; then
+ glib_cflags=`$pkg_config --cflags $i`
+ glib_libs=`$pkg_config --libs $i`
+ CFLAGS="$glib_cflags $CFLAGS"
+ LIBS="$glib_libs $LIBS"
+ libs_qga="$glib_libs $libs_qga"
+ else
+ error_exit "glib-$glib_req_ver $i is required to compile QEMU"
+ fi
+done
+
+##########################################
+# SHA command probe for modules
+if test "$modules" = yes; then
+ shacmd_probe="sha1sum sha1 shasum"
+ for c in $shacmd_probe; do
+ if which $c &>/dev/null; then
+ shacmd="$c"
+ break
+ fi
+ done
+ if test "$shacmd" = ""; then
+ error_exit "one of the checksum commands is required to enable modules: $shacmd_probe"
+ fi
fi
##########################################
@@ -3661,6 +3679,7 @@ if test "$mingw32" = "yes" ; then
fi
qemu_confdir=$sysconfdir$confsuffix
+qemu_moddir=$libdir$confsuffix
qemu_datadir=$datadir$confsuffix
qemu_localedir="$datadir/locale"
@@ -3751,6 +3770,7 @@ echo "Install prefix $prefix"
echo "BIOS directory `eval echo $qemu_datadir`"
echo "binary directory `eval echo $bindir`"
echo "library directory `eval echo $libdir`"
+echo "module directory `eval echo $qemu_moddir`"
echo "libexec directory `eval echo $libexecdir`"
echo "include directory `eval echo $includedir`"
echo "config directory `eval echo $sysconfdir`"
@@ -3890,6 +3910,7 @@ echo "sysconfdir=$sysconfdir" >> $config_host_mak
echo "qemu_confdir=$qemu_confdir" >> $config_host_mak
echo "qemu_datadir=$qemu_datadir" >> $config_host_mak
echo "qemu_docdir=$qemu_docdir" >> $config_host_mak
+echo "qemu_moddir=$qemu_moddir" >> $config_host_mak
if test "$mingw32" = "no" ; then
echo "qemu_localstatedir=$local_statedir" >> $config_host_mak
fi
@@ -4023,6 +4044,9 @@ if [ "$docs" = "yes" ] ; then
echo "BUILD_DOCS=yes" >> $config_host_mak
fi
if test "$modules" = "yes"; then
+ # $shacmd can generate a hash started with digit, which the compiler doesn't
+ # like as an symbol. So prefix it with an underscore
+ echo "CONFIG_STAMP=_`(echo $qemu_version; echo $pkgversion; cat $0) | $shacmd - | cut -f1 -d\ `" >> $config_host_mak
echo "CONFIG_MODULES=y" >> $config_host_mak
fi
if test "$sdl" = "yes" ; then