4842d2c7ec
The 1588 standard defines one step operation for both Sync and PDelay_Resp messages. Up until now, hardware with P2P one step has been rare, and kernel support was lacking. This patch adds support of the mode in anticipation of new kernel and hardware developments. Signed-off-by: Richard Cochran <richardcochran@gmail.com>
93 lines
2.5 KiB
Bash
Executable File
93 lines
2.5 KiB
Bash
Executable File
#!/bin/sh
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#
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# Discover the CFLAGS to use during compilation.
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#
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# Copyright (C) 2013 Richard Cochran <richardcochran@gmail.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# Look for functional prototypes in the C library.
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#
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user_flags()
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{
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# Needed for vasprintf().
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printf " -D_GNU_SOURCE"
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# Get list of directories searched for header files.
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dirs=$(echo "" | ${CROSS_COMPILE}cpp -Wp,-v 2>&1 >/dev/null | grep ^" /")
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# Look for clock_adjtime().
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for d in $dirs; do
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files=$(find $d -type f -name time.h -o -name timex.h)
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for f in $files; do
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if grep -q clock_adjtime $f; then
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printf " -DHAVE_CLOCK_ADJTIME"
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break 2
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fi
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done
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done
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# Look for posix_spawn().
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for d in $dirs; do
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files=$(find $d -type f -name spawn.h)
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for f in $files; do
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if grep -q posix_spawn $f; then
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printf " -DHAVE_POSIX_SPAWN"
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break 2
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fi
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done
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done
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}
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#
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# Find the most appropriate kernel header for the SIOCSHWTSTAMP ioctl.
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#
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# 1. custom kernel or cross build using KBUILD_OUTPUT
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# 2. sanitized headers installed under /lib/modules/`uname -r`/build
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# 3. normal build using standard system headers
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#
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kernel_flags()
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{
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prefix=""
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tstamp=/usr/include/linux/net_tstamp.h
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if [ "x$KBUILD_OUTPUT" != "x" ]; then
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# With KBUILD_OUTPUT set, we are building against
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# either a custom kernel or a cross compiled kernel.
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build=${KBUILD_OUTPUT}
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else
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# If the currently running kernel is a custom build
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# with the headers installed, then we should use them.
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build=/lib/modules/`uname -r`/build
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fi
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if [ -f ${build}${tstamp} ]; then
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prefix=${build}
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printf " -I%s/usr/include" $prefix
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fi
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if grep -q HWTSTAMP_TX_ONESTEP_SYNC ${prefix}${tstamp}; then
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printf " -DHAVE_ONESTEP_SYNC"
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fi
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if grep -q HWTSTAMP_TX_ONESTEP_P2P ${prefix}${tstamp}; then
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printf " -DHAVE_ONESTEP_P2P"
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fi
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}
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flags="$(user_flags)$(kernel_flags)"
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echo "$flags"
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