[PATCH v3] configure: Avoid compiling system tools on user build by default

[Philippe Mathieu-Daudé]

User-mode does not need the system tools. Do not build them by
default if the user specifies --disable-system.

This disables building the following binaries on a user-only build:

- elf2dmp
- qemu-edid
- qemu-ga
- qemu-img
- qemu-io
- qemu-nbd
- ivshmem-client
- ivshmem-server

The qemu-user binaries are not affected by this change.

Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
---
v3:
- fixed typos (Aleksandar)
v2:
- use simpler if/else statement (therefore not adding Richard R-b)
- improved description (Aleksandar)
---
 configure | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index 6f5d850949..efe00dd497 100755
--- a/configure
+++ b/configure
@@ -455,7 +455,7 @@ guest_agent_ntddscsi="no"
 guest_agent_msi=""
 vss_win32_sdk=""
 win_sdk="no"
-want_tools="yes"
+want_tools=""
 libiscsi=""
 libnfs=""
 coroutine=""
@@ -2213,6 +2213,16 @@ else
     echo big/little test failed
 fi
 
+##########################################
+# system tools
+if test -z "$want_tools"; then
+    if test "$softmmu" = "no"; then
+        want_tools=no
+    else
+        want_tools=yes
+    fi
+fi
+
 ##########################################
 # cocoa implies not SDL or GTK
 # (the cocoa UI code currently assumes it is always the active UI
-- 
2.21.1