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build: port qemu to cygwin

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A cygwin build of the qemu driver fails with:

qemu/qemu_process.c: In function 'qemuPrepareCpumap':
qemu/qemu_process.c:1803:31: error: 'CPU_SETSIZE' undeclared (first use in this function)

CPU_SETSIZE is a Linux extension in <sched.h>; a bit more portable
is using sysconf if _SC_NPROCESSORS_CONF is defined (several platforms
have it, including Cygwin).  Ultimately, I would have preferred to
use gnulib's 'nproc' module, but it is currently under an incompatible
license.

* src/qemu/qemu_conf.h (QEMUD_CPUMASK_LEN): Provide definition on
cygwin.

Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Eric Blake 2013-05-29 21:00:51 -06:00
parent d671121ddc
commit 19a7f9fffb
1 changed files with 7 additions and 1 deletions
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8
src/qemu/qemu_conf.h
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@ -45,7 +45,13 @@
# include "locking/lock_manager.h"
# include "qemu_capabilities.h"
# define QEMUD_CPUMASK_LEN CPU_SETSIZE
# ifdef CPU_SETSIZE /* Linux */
# define QEMUD_CPUMASK_LEN CPU_SETSIZE
# elif defined(_SC_NPROCESSORS_CONF) /* Cygwin */
# define QEMUD_CPUMASK_LEN (sysconf(_SC_NPROCESSORS_CONF))
# else
# error "Port me"
# endif
typedef struct _virQEMUCloseCallbacks virQEMUCloseCallbacks;
typedef virQEMUCloseCallbacks *virQEMUCloseCallbacksPtr;