1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
#!/bin/sh
#
# Discover the CFLAGS to use during compilation.
#
# Copyright (C) 2013 Richard Cochran <richardcochran@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# Look for functional prototypes in the C library.
#
user_flags()
{
# Needed for vasprintf().
printf " -D_GNU_SOURCE"
# Get list of directories searched for header files.
dirs=$(${CC} -E -Wp,-v -xc /dev/null 2>&1 >/dev/null | grep ^" /")
# Look for clock_adjtime().
for d in $dirs; do
files=$(find $d -type f -name time.h -o -name timex.h)
for f in $files; do
if grep -q clock_adjtime $f; then
printf " -DHAVE_CLOCK_ADJTIME"
break 2
fi
done
done
# Look for posix_spawn().
for d in $dirs; do
files=$(find $d -type f -name spawn.h)
for f in $files; do
if grep -q posix_spawn $f; then
printf " -DHAVE_POSIX_SPAWN"
break 2
fi
done
done
}
#
# Find the most appropriate kernel header for the SIOCSHWTSTAMP ioctl.
#
# 1. custom kernel or cross build using KBUILD_OUTPUT
# 2. sanitized headers installed under /lib/modules/`uname -r`/build
# 3. normal build using standard system headers
#
kernel_flags()
{
prefix=""
tstamp=/usr/include/linux/net_tstamp.h
ptp_clock=/usr/include/linux/ptp_clock.h
if [ "x$KBUILD_OUTPUT" != "x" ]; then
# With KBUILD_OUTPUT set, we are building against
# either a custom kernel or a cross compiled kernel.
build=${KBUILD_OUTPUT}
else
# If the currently running kernel is a custom build
# with the headers installed, then we should use them.
build=/lib/modules/`uname -r`/build
fi
if [ -f ${build}${tstamp} ]; then
prefix=${build}
printf " -I%s/usr/include" $prefix
fi
if grep -q HWTSTAMP_TX_ONESTEP_SYNC ${prefix}${tstamp}; then
printf " -DHAVE_ONESTEP_SYNC"
fi
if grep -q HWTSTAMP_TX_ONESTEP_P2P ${prefix}${tstamp}; then
printf " -DHAVE_ONESTEP_P2P"
fi
if grep -q SOF_TIMESTAMPING_BIND_PHC ${prefix}${tstamp}; then
printf " -DHAVE_VCLOCKS"
fi
if grep -q adjust_phase ${prefix}${ptp_clock}; then
printf " -DHAVE_PTP_CAPS_ADJUST_PHASE"
fi
}
flags="$(user_flags)$(kernel_flags)"
echo "$flags"
|
