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configure: improve usbfs check

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The current check to test if usbfs support should be compiled or not
solely relies on the presence of <linux/usbdevice_fs.h>, without
actually checking that all definition used by Qemu are provided by
this header file.

With sufficiently old kernel headers, <linux/usbdevice_fs.h> may be
present, but some of the definitions needed by Qemu may not be
available.

This commit improves the check by building a small program that
actually tests whether the necessary definitions are available.

In addition, it fixes a bug where have_usbfs was set to "yes"
regardless of the result of the test.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20190213211827.20300-1-thomas.petazzoni@bootlin.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Thomas Petazzoni 2019-02-13 22:18:27 +01:00 committed by Laurent Vivier
parent 9aed808e35
commit 96566d09aa
1 changed files with 17 additions and 2 deletions
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19
configure vendored
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@ -4262,10 +4262,25 @@ fi
# check for usbfs
have_usbfs=no
if test "$linux_user" = "yes"; then
if check_include linux/usbdevice_fs.h; then
cat > $TMPC << EOF
#include <linux/usbdevice_fs.h>
#ifndef USBDEVFS_GET_CAPABILITIES
#error "USBDEVFS_GET_CAPABILITIES undefined"
#endif
#ifndef USBDEVFS_DISCONNECT_CLAIM
#error "USBDEVFS_DISCONNECT_CLAIM undefined"
#endif
int main(void)
{
return 0;
}
EOF
if compile_prog "" ""; then
have_usbfs=yes
fi
have_usbfs=yes
fi
# check for fallocate