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block: feature detection for host block support

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On Darwin (iOS), there are no system level APIs for directly accessing
host block devices. We detect this at configure time.

Signed-off-by: Joelle van Dyne <j@getutm.app>
Message-Id: <20210315180341.31638-2-j@getutm.app>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Joelle van Dyne 2021-03-15 11:03:38 -07:00 • committed by Paolo Bonzini
parent 18473467d5
commit 14176c8d05
3 changed files with 37 additions and 16 deletions
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6
meson.build
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@ -183,7 +183,7 @@ if targetos == 'windows'
include_directories: include_directories('.'))
elif targetos == 'darwin'
coref = dependency('appleframeworks', modules: 'CoreFoundation')
iokit = dependency('appleframeworks', modules: 'IOKit')
iokit = dependency('appleframeworks', modules: 'IOKit', required: false)
elif targetos == 'sunos'
socket = [cc.find_library('socket'),
cc.find_library('nsl'),
@ -1148,6 +1148,9 @@ if get_option('cfi')
add_global_link_arguments(cfi_flags, native: false, language: ['c', 'cpp', 'objc'])
endif
have_host_block_device = (targetos != 'darwin' or
cc.has_header('IOKit/storage/IOMedia.h'))
#################
# config-host.h #
#################
@ -1247,6 +1250,7 @@ config_host_data.set('HAVE_PTY_H', cc.has_header('pty.h'))
config_host_data.set('HAVE_SYS_IOCCOM_H', cc.has_header('sys/ioccom.h'))
config_host_data.set('HAVE_SYS_KCOV_H', cc.has_header('sys/kcov.h'))
config_host_data.set('HAVE_SYSTEM_FUNCTION', cc.has_function('system', prefix: '#include <stdlib.h>'))
config_host_data.set('HAVE_HOST_BLOCK_DEVICE', have_host_block_device)
config_host_data.set('CONFIG_PREADV', cc.has_function('preadv', prefix: '#include <sys/uio.h>'))