meson, configure: move Xen detection to meson

This is quite a complicated check.  I moved all the test programs to
a single file in scripts/, picking the right program with #if and a -D
flag in meson.build's cc.links() invocation.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 1 insertions, 321 deletions

diff --git a/configure b/configure
index 8b775492d0..519982800e 100755
--- a/configure
+++ b/configure
@@ -292,7 +292,6 @@ EXTRA_CXXFLAGS=""
 EXTRA_OBJCFLAGS=""
 EXTRA_LDFLAGS=""
 
-xen_ctrl_version="$default_feature"
 vhost_kernel="$default_feature"
 vhost_net="$default_feature"
 vhost_crypto="$default_feature"
@@ -346,9 +345,6 @@ default_devices="true"
 tcg="enabled"
 cfi="false"
 
-# 4. Detection partly done in configure
-xen=${default_feature:+disabled}
-
 # parse CC options second
 for opt do
   optarg=$(expr "x$opt" : 'x[^=]*=\(.*\)')
@@ -867,10 +863,6 @@ for opt do
   ;;
   --enable-slirp=*) slirp="$optarg"
   ;;
-  --disable-xen) xen="disabled"
-  ;;
-  --enable-xen) xen="enabled"
-  ;;
   --disable-tcg) tcg="disabled"
                  plugins="no"
   ;;
@@ -1699,312 +1691,6 @@ if ! has "$pkg_config_exe"; then
 fi
 
 ##########################################
-# xen probe
-
-if test "$xen" != "disabled" ; then
-  # Check whether Xen library path is specified via --extra-ldflags to avoid
-  # overriding this setting with pkg-config output. If not, try pkg-config
-  # to obtain all needed flags.
-
-  if ! echo $EXTRA_LDFLAGS | grep tools/libxc > /dev/null && \
-     $pkg_config --exists xencontrol ; then
-    xen_ctrl_version="$(printf '%d%02d%02d' \
-      $($pkg_config --modversion xencontrol | sed 's/\./ /g') )"
-    xen=enabled
-    xen_pc="xencontrol xenstore xenforeignmemory xengnttab"
-    xen_pc="$xen_pc xenevtchn xendevicemodel"
-    if $pkg_config --exists xentoolcore; then
-      xen_pc="$xen_pc xentoolcore"
-    fi
-    xen_cflags="$($pkg_config --cflags $xen_pc)"
-    xen_libs="$($pkg_config --libs $xen_pc)"
-  else
-
-    xen_libs="-lxenstore -lxenctrl"
-    xen_stable_libs="-lxenforeignmemory -lxengnttab -lxenevtchn"
-
-    # First we test whether Xen headers and libraries are available.
-    # If no, we are done and there is no Xen support.
-    # If yes, more tests are run to detect the Xen version.
-
-    # Xen (any)
-    cat > $TMPC <<EOF
-#include <xenctrl.h>
-int main(void) {
-  return 0;
-}
-EOF
-    if ! compile_prog "" "$xen_libs" ; then
-      # Xen not found
-      if test "$xen" = "enabled" ; then
-        feature_not_found "xen" "Install xen devel"
-      fi
-      xen=disabled
-
-    # Xen unstable
-    elif
-        cat > $TMPC <<EOF &&
-#undef XC_WANT_COMPAT_DEVICEMODEL_API
-#define __XEN_TOOLS__
-#include <xendevicemodel.h>
-#include <xenforeignmemory.h>
-int main(void) {
-  xendevicemodel_handle *xd;
-  xenforeignmemory_handle *xfmem;
-
-  xd = xendevicemodel_open(0, 0);
-  xendevicemodel_pin_memory_cacheattr(xd, 0, 0, 0, 0);
-
-  xfmem = xenforeignmemory_open(0, 0);
-  xenforeignmemory_map_resource(xfmem, 0, 0, 0, 0, 0, NULL, 0, 0);
-
-  return 0;
-}
-EOF
-        compile_prog "" "$xen_libs -lxendevicemodel $xen_stable_libs -lxentoolcore"
-      then
-      xen_stable_libs="-lxendevicemodel $xen_stable_libs -lxentoolcore"
-      xen_ctrl_version=41100
-      xen=enabled
-    elif
-        cat > $TMPC <<EOF &&
-#undef XC_WANT_COMPAT_MAP_FOREIGN_API
-#include <xenforeignmemory.h>
-#include <xentoolcore.h>
-int main(void) {
-  xenforeignmemory_handle *xfmem;
-
-  xfmem = xenforeignmemory_open(0, 0);
-  xenforeignmemory_map2(xfmem, 0, 0, 0, 0, 0, 0, 0);
-  xentoolcore_restrict_all(0);
-
-  return 0;
-}
-EOF
-        compile_prog "" "$xen_libs -lxendevicemodel $xen_stable_libs -lxentoolcore"
-      then
-      xen_stable_libs="-lxendevicemodel $xen_stable_libs -lxentoolcore"
-      xen_ctrl_version=41000
-      xen=enabled
-    elif
-        cat > $TMPC <<EOF &&
-#undef XC_WANT_COMPAT_DEVICEMODEL_API
-#define __XEN_TOOLS__
-#include <xendevicemodel.h>
-int main(void) {
-  xendevicemodel_handle *xd;
-
-  xd = xendevicemodel_open(0, 0);
-  xendevicemodel_close(xd);
-
-  return 0;
-}
-EOF
-        compile_prog "" "$xen_libs -lxendevicemodel $xen_stable_libs"
-      then
-      xen_stable_libs="-lxendevicemodel $xen_stable_libs"
-      xen_ctrl_version=40900
-      xen=enabled
-    elif
-        cat > $TMPC <<EOF &&
-/*
- * If we have stable libs the we don't want the libxc compat
- * layers, regardless of what CFLAGS we may have been given.
- *
- * Also, check if xengnttab_grant_copy_segment_t is defined and
- * grant copy operation is implemented.
- */
-#undef XC_WANT_COMPAT_EVTCHN_API
-#undef XC_WANT_COMPAT_GNTTAB_API
-#undef XC_WANT_COMPAT_MAP_FOREIGN_API
-#include <xenctrl.h>
-#include <xenstore.h>
-#include <xenevtchn.h>
-#include <xengnttab.h>
-#include <xenforeignmemory.h>
-#include <stdint.h>
-#include <xen/hvm/hvm_info_table.h>
-#if !defined(HVM_MAX_VCPUS)
-# error HVM_MAX_VCPUS not defined
-#endif
-int main(void) {
-  xc_interface *xc = NULL;
-  xenforeignmemory_handle *xfmem;
-  xenevtchn_handle *xe;
-  xengnttab_handle *xg;
-  xengnttab_grant_copy_segment_t* seg = NULL;
-
-  xs_daemon_open();
-
-  xc = xc_interface_open(0, 0, 0);
-  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
-  xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
-  xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000);
-  xc_hvm_create_ioreq_server(xc, 0, HVM_IOREQSRV_BUFIOREQ_ATOMIC, NULL);
-
-  xfmem = xenforeignmemory_open(0, 0);
-  xenforeignmemory_map(xfmem, 0, 0, 0, 0, 0);
-
-  xe = xenevtchn_open(0, 0);
-  xenevtchn_fd(xe);
-
-  xg = xengnttab_open(0, 0);
-  xengnttab_grant_copy(xg, 0, seg);
-
-  return 0;
-}
-EOF
-        compile_prog "" "$xen_libs $xen_stable_libs"
-      then
-      xen_ctrl_version=40800
-      xen=enabled
-    elif
-        cat > $TMPC <<EOF &&
-/*
- * If we have stable libs the we don't want the libxc compat
- * layers, regardless of what CFLAGS we may have been given.
- */
-#undef XC_WANT_COMPAT_EVTCHN_API
-#undef XC_WANT_COMPAT_GNTTAB_API
-#undef XC_WANT_COMPAT_MAP_FOREIGN_API
-#include <xenctrl.h>
-#include <xenstore.h>
-#include <xenevtchn.h>
-#include <xengnttab.h>
-#include <xenforeignmemory.h>
-#include <stdint.h>
-#include <xen/hvm/hvm_info_table.h>
-#if !defined(HVM_MAX_VCPUS)
-# error HVM_MAX_VCPUS not defined
-#endif
-int main(void) {
-  xc_interface *xc = NULL;
-  xenforeignmemory_handle *xfmem;
-  xenevtchn_handle *xe;
-  xengnttab_handle *xg;
-
-  xs_daemon_open();
-
-  xc = xc_interface_open(0, 0, 0);
-  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
-  xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
-  xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000);
-  xc_hvm_create_ioreq_server(xc, 0, HVM_IOREQSRV_BUFIOREQ_ATOMIC, NULL);
-
-  xfmem = xenforeignmemory_open(0, 0);
-  xenforeignmemory_map(xfmem, 0, 0, 0, 0, 0);
-
-  xe = xenevtchn_open(0, 0);
-  xenevtchn_fd(xe);
-
-  xg = xengnttab_open(0, 0);
-  xengnttab_map_grant_ref(xg, 0, 0, 0);
-
-  return 0;
-}
-EOF
-        compile_prog "" "$xen_libs $xen_stable_libs"
-      then
-      xen_ctrl_version=40701
-      xen=enabled
-
-    # Xen 4.6
-    elif
-        cat > $TMPC <<EOF &&
-#include <xenctrl.h>
-#include <xenstore.h>
-#include <stdint.h>
-#include <xen/hvm/hvm_info_table.h>
-#if !defined(HVM_MAX_VCPUS)
-# error HVM_MAX_VCPUS not defined
-#endif
-int main(void) {
-  xc_interface *xc;
-  xs_daemon_open();
-  xc = xc_interface_open(0, 0, 0);
-  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
-  xc_gnttab_open(NULL, 0);
-  xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
-  xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000);
-  xc_hvm_create_ioreq_server(xc, 0, HVM_IOREQSRV_BUFIOREQ_ATOMIC, NULL);
-  xc_reserved_device_memory_map(xc, 0, 0, 0, 0, NULL, 0);
-  return 0;
-}
-EOF
-        compile_prog "" "$xen_libs"
-      then
-      xen_ctrl_version=40600
-      xen=enabled
-
-    # Xen 4.5
-    elif
-        cat > $TMPC <<EOF &&
-#include <xenctrl.h>
-#include <xenstore.h>
-#include <stdint.h>
-#include <xen/hvm/hvm_info_table.h>
-#if !defined(HVM_MAX_VCPUS)
-# error HVM_MAX_VCPUS not defined
-#endif
-int main(void) {
-  xc_interface *xc;
-  xs_daemon_open();
-  xc = xc_interface_open(0, 0, 0);
-  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
-  xc_gnttab_open(NULL, 0);
-  xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
-  xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000);
-  xc_hvm_create_ioreq_server(xc, 0, 0, NULL);
-  return 0;
-}
-EOF
-        compile_prog "" "$xen_libs"
-      then
-      xen_ctrl_version=40500
-      xen=enabled
-
-    elif
-        cat > $TMPC <<EOF &&
-#include <xenctrl.h>
-#include <xenstore.h>
-#include <stdint.h>
-#include <xen/hvm/hvm_info_table.h>
-#if !defined(HVM_MAX_VCPUS)
-# error HVM_MAX_VCPUS not defined
-#endif
-int main(void) {
-  xc_interface *xc;
-  xs_daemon_open();
-  xc = xc_interface_open(0, 0, 0);
-  xc_hvm_set_mem_type(0, 0, HVMMEM_ram_ro, 0, 0);
-  xc_gnttab_open(NULL, 0);
-  xc_domain_add_to_physmap(0, 0, XENMAPSPACE_gmfn, 0, 0);
-  xc_hvm_inject_msi(xc, 0, 0xf0000000, 0x00000000);
-  return 0;
-}
-EOF
-        compile_prog "" "$xen_libs"
-      then
-      xen_ctrl_version=40200
-      xen=enabled
-
-    else
-      if test "$xen" = "enabled" ; then
-        feature_not_found "xen (unsupported version)" \
-                          "Install a supported xen (xen 4.2 or newer)"
-      fi
-      xen=disabled
-    fi
-
-    if test "$xen" = enabled; then
-      if test $xen_ctrl_version -ge 40701  ; then
-        xen_libs="$xen_libs $xen_stable_libs "
-      fi
-    fi
-  fi
-fi
-
-##########################################
 # glib support probe
 
 glib_req_ver=2.56
@@ -2555,12 +2241,6 @@ if test "$modules" = "yes"; then
 fi
 echo "CONFIG_TLS_PRIORITY=\"$tls_priority\"" >> $config_host_mak
 
-if test "$xen" = "enabled" ; then
-  echo "CONFIG_XEN_BACKEND=y" >> $config_host_mak
-  echo "CONFIG_XEN_CTRL_INTERFACE_VERSION=$xen_ctrl_version" >> $config_host_mak
-  echo "XEN_CFLAGS=$xen_cflags" >> $config_host_mak
-  echo "XEN_LIBS=$xen_libs" >> $config_host_mak
-fi
 if test "$vhost_scsi" = "yes" ; then
   echo "CONFIG_VHOST_SCSI=y" >> $config_host_mak
 fi
@@ -2839,7 +2519,7 @@ if test "$skip_meson" = no; then
         -Dwerror=$(if test "$werror" = yes; then echo true; else echo false; fi) \
         -Db_pie=$(if test "$pie" = yes; then echo true; else echo false; fi) \
         -Db_coverage=$(if test "$gcov" = yes; then echo true; else echo false; fi) \
-        -Db_lto=$lto -Dcfi=$cfi -Dtcg=$tcg -Dxen=$xen \
+        -Db_lto=$lto -Dcfi=$cfi -Dtcg=$tcg \
         -Dcapstone=$capstone -Dfdt=$fdt -Dslirp=$slirp \
         $(test -n "${LIB_FUZZING_ENGINE+xxx}" && echo "-Dfuzzing_engine=$LIB_FUZZING_ENGINE") \
         $(if test "$default_feature" = no; then echo "-Dauto_features=disabled"; fi) \