X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=configure.ac;h=85cf463e90c8f63cbe173447449f897cd8032542;hb=556a74a4dac8afb31d016ea673bece55b09e8994;hp=544b4345161653b11a63502410db53bb29989fa7;hpb=e55f1475d1d55cd9934d23cd7188c7e9037542f9;p=libguestfs.git

diff --git a/configure.ac b/configure.ac
index 544b434..85cf463 100644
--- a/configure.ac
+++ b/configure.ac
@@ -310,6 +310,19 @@ AC_DEFINE_UNQUOTED([QEMU],["$QEMU"],[Location of qemu binary.])
 
 dnl Check that the chosen qemu has virtio-serial support.
 if test "x$vmchannel_test" != "xno"; then
+    AC_MSG_CHECKING([that $QEMU -help works])
+    if $QEMU -help > /dev/null 2>&1; then
+        AC_MSG_RESULT([yes])
+    else
+        AC_MSG_RESULT([no])
+        AC_MSG_FAILURE(
+[$QEMU -help: command failed.
+
+This could be a very old version of qemu, or qemu might not be
+working.
+])
+    fi
+
     AC_MSG_CHECKING([for virtio-serial support in $QEMU])
     if $QEMU -nographic -device \? 2>&1 | grep -sq virtio-serial; then
         AC_MSG_RESULT([yes])
@@ -785,7 +798,7 @@ AS_IF([test "x$PERL" != "xno"],
         missing_perl_modules=no
         for pm in Pod::Usage Getopt::Long Sys::Virt Data::Dumper Locale::TextDomain Win::Hivex Win::Hivex::Regedit String::ShellQuote; do
             AC_MSG_CHECKING([for $pm])
-            if ! $PERL -M$pm -e1 >/dev/null 2>&1; then
+            if ! $PERL -M$pm -e1 >&AS_MESSAGE_LOG_FD 2>&1; then
                 AC_MSG_RESULT([no])
                 missing_perl_modules=yes
             else