Building bluez out of git within OpenEmbedded for ARM results in the
following compilation "error impossible constraint in 'asm'"
arm-poky-linux-gnueabi-gcc -march=armv7-a -marm -mthumb-interwork
-mfloat-abi=hard -mfpu=neon -mtune=cortex-a8
--sysroot=/home/johnc/tt/ViciaHeinox/build/tmp/sysroots/trex
-DHAVE_CONFIG_H -I. -I./lib
-I/home/johnc/tt/ViciaHeinox/build/tmp/sysroots/trex/usr/include/dbus-1.0
-I/home/johnc/tt/ViciaHeinox/build/tmp/sysroots/trex/usr/lib/dbus-1.0/include
-I/home/johnc/tt/ViciaHeinox/build/tmp/sysroots/trex/usr/include/glib-2.0
-I/home/johnc/tt/ViciaHeinox/build/tmp/sysroots/trex/usr/lib/glib-2.0/include
-O2 -pipe -g -feliminate-unused-debug-types -c -o
tools/test-runner.o tools/test-runner.c
| tools/test-runner.c: In function 'start_qemu':
| tools/test-runner.c:224:2: error: impossible constraint in 'asm'
| __asm__ __volatile__("cpuid" : "=c" (ecx) : "a" (1) : "memory");
| ^
I believe this was introduced with this commit....
commit a0a03828fbc49db9f0926cee87d53d627d69bac2
Author: Marcel Holtmann <marcel@xxxxxxxxxxxx>
Date: Mon Apr 6 20:45:39 2015 -0700
tools: Add fallback if KVM support is not available
diff --git a/tools/test-runner.c b/tools/test-runner.c
index 407a985..163b610 100644
--- a/tools/test-runner.c
+++ b/tools/test-runner.c
@@ -195,7 +195,7 @@ static char *const qemu_argv[] = {
"-no-user-config",
"-monitor", "none",
"-display", "none",
- "-machine", "type=q35,accel=kvm",
+ "-machine", "type=q35,accel=kvm:tcg",
"-m", "192M",
"-nographic",
"-vga", "none",
@@ -215,6 +215,16 @@ static char *const qemu_envp[] = {
NULL
};
+static void check_virtualization(void)
+{
+ uint32_t ecx;
+
+ __asm__ __volatile__("cpuid" : "=c" (ecx) : "a" (1) : "memory");
+
+ if (!!(ecx & (1 << 5)))
+ printf("Found support for Virtual Machine eXtensions\n");
+}
+
--
John Carter
Phone : (64)(3) 358 6639
Tait Electronics
PO Box 1645 Christchurch
New Zealand
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