mirror of
https://git.kernel.org/pub/scm/network/iproute2/iproute2.git
synced 2024-11-23 01:46:56 +08:00
0ddadc93e5
Old libbpf library versions (< 0.7.x) may not have the libbpf_version.h
header packaged. This header would provide LIBBPF_MAJOR_VERSION and
LIBBPF_MINOR_VERSION which are then missing to control conditional
compilation in some source files.
Provide surrogates for these defines via CFLAGS that are derived from
the LIBBPF_VERSION determined with $(${PKG_CONFIG} libbpf --modversion).
Signed-off-by: Stefan Mätje <stefan.maetje@esd.eu>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
627 lines
14 KiB
Bash
Executable File
627 lines
14 KiB
Bash
Executable File
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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# This is not an autoconf generated configure
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INCLUDE="$PWD/include"
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PREFIX="/usr"
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LIBDIR="\${prefix}/lib"
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COLOR="never"
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# Output file which is input to Makefile
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CONFIG=config.mk
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# Make a temp directory in build tree.
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TMPDIR=$(mktemp -d config.XXXXXX)
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trap 'status=$?; rm -rf $TMPDIR; exit $status' EXIT HUP INT QUIT TERM
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check_toolchain()
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{
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: ${PKG_CONFIG:=pkg-config}
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: ${AR=ar}
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: ${CC=gcc}
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: ${YACC=bison}
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echo "PKG_CONFIG:=${PKG_CONFIG}" >>$CONFIG
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echo "AR:=${AR}" >>$CONFIG
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echo "CC:=${CC}" >>$CONFIG
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echo "YACC:=${YACC}" >>$CONFIG
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}
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check_xtables()
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{
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if ! ${PKG_CONFIG} xtables --exists; then
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echo "TC_CONFIG_NO_XT:=y" >>$CONFIG
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fi
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}
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check_xt()
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{
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#check if we have xtables from iptables >= 1.4.5.
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cat >$TMPDIR/ipttest.c <<EOF
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#include <xtables.h>
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#include <linux/netfilter.h>
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static struct xtables_globals test_globals = {
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.option_offset = 0,
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.program_name = "tc-ipt",
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.program_version = XTABLES_VERSION,
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.orig_opts = NULL,
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.opts = NULL,
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.exit_err = NULL,
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};
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int main(int argc, char **argv)
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{
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xtables_init_all(&test_globals, NFPROTO_IPV4);
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return 0;
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}
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EOF
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if $CC -I$INCLUDE $IPTC -o $TMPDIR/ipttest $TMPDIR/ipttest.c $IPTL \
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$(${PKG_CONFIG} xtables --cflags --libs) -ldl >/dev/null 2>&1; then
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echo "TC_CONFIG_XT:=y" >>$CONFIG
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echo "using xtables"
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fi
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rm -f $TMPDIR/ipttest.c $TMPDIR/ipttest
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}
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check_xt_old()
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{
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# bail if previous XT checks has already succeeded.
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grep -q TC_CONFIG_XT $CONFIG && return
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#check if we don't need our internal header ..
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cat >$TMPDIR/ipttest.c <<EOF
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#include <xtables.h>
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char *lib_dir;
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unsigned int global_option_offset = 0;
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const char *program_version = XTABLES_VERSION;
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const char *program_name = "tc-ipt";
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struct afinfo afinfo = {
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.libprefix = "libxt_",
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};
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void exit_error(enum exittype status, const char *msg, ...)
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{
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}
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int main(int argc, char **argv) {
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return 0;
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}
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EOF
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if $CC -I$INCLUDE $IPTC -o $TMPDIR/ipttest $TMPDIR/ipttest.c $IPTL -ldl >/dev/null 2>&1; then
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echo "TC_CONFIG_XT_OLD:=y" >>$CONFIG
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echo "using old xtables (no need for xt-internal.h)"
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fi
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rm -f $TMPDIR/ipttest.c $TMPDIR/ipttest
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}
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check_xt_old_internal_h()
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{
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# bail if previous XT checks has already succeeded.
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grep -q TC_CONFIG_XT $CONFIG && return
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#check if we need our own internal.h
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cat >$TMPDIR/ipttest.c <<EOF
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#include <xtables.h>
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#include "xt-internal.h"
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char *lib_dir;
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unsigned int global_option_offset = 0;
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const char *program_version = XTABLES_VERSION;
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const char *program_name = "tc-ipt";
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struct afinfo afinfo = {
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.libprefix = "libxt_",
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};
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void exit_error(enum exittype status, const char *msg, ...)
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{
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}
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int main(int argc, char **argv) {
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return 0;
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}
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EOF
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if $CC -I$INCLUDE $IPTC -o $TMPDIR/ipttest $TMPDIR/ipttest.c $IPTL -ldl >/dev/null 2>&1; then
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echo "using old xtables with xt-internal.h"
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echo "TC_CONFIG_XT_OLD_H:=y" >>$CONFIG
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fi
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rm -f $TMPDIR/ipttest.c $TMPDIR/ipttest
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}
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check_lib_dir()
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{
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LIBDIR=$(echo $LIBDIR | sed "s|\${prefix}|$PREFIX|")
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echo -n "lib directory: "
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echo "$LIBDIR"
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echo "LIBDIR:=$LIBDIR" >> $CONFIG
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}
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check_setns()
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{
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cat >$TMPDIR/setnstest.c <<EOF
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#define _GNU_SOURCE
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#include <sched.h>
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int main(int argc, char **argv)
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{
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(void)setns(0,0);
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return 0;
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}
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EOF
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if $CC -I$INCLUDE -o $TMPDIR/setnstest $TMPDIR/setnstest.c >/dev/null 2>&1; then
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echo "IP_CONFIG_SETNS:=y" >>$CONFIG
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echo "yes"
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echo "CFLAGS += -DHAVE_SETNS" >>$CONFIG
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else
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echo "no"
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fi
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rm -f $TMPDIR/setnstest.c $TMPDIR/setnstest
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}
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check_name_to_handle_at()
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{
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cat >$TMPDIR/name_to_handle_at_test.c <<EOF
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#define _GNU_SOURCE
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#include <sys/types.h>
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#include <fcntl.h>
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int main(int argc, char **argv)
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{
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struct file_handle *fhp;
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int mount_id, flags, dirfd;
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char *pathname;
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name_to_handle_at(dirfd, pathname, fhp, &mount_id, flags);
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return 0;
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}
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EOF
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if $CC -I$INCLUDE -o $TMPDIR/name_to_handle_at_test $TMPDIR/name_to_handle_at_test.c >/dev/null 2>&1; then
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echo "yes"
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echo "CFLAGS += -DHAVE_HANDLE_AT" >>$CONFIG
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else
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echo "no"
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fi
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rm -f $TMPDIR/name_to_handle_at_test.c $TMPDIR/name_to_handle_at_test
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}
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check_ipset()
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{
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cat >$TMPDIR/ipsettest.c <<EOF
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#include <linux/netfilter/ipset/ip_set.h>
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#ifndef IP_SET_INVALID
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#define IPSET_DIM_MAX 3
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typedef unsigned short ip_set_id_t;
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#endif
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#include <linux/netfilter/xt_set.h>
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struct xt_set_info info;
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#if IPSET_PROTOCOL == 6 || IPSET_PROTOCOL == 7
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int main(void)
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{
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return IPSET_MAXNAMELEN;
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}
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#else
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#error unknown ipset version
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#endif
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EOF
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if $CC -I$INCLUDE -o $TMPDIR/ipsettest $TMPDIR/ipsettest.c >/dev/null 2>&1; then
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echo "TC_CONFIG_IPSET:=y" >>$CONFIG
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echo "yes"
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else
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echo "no"
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fi
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rm -f $TMPDIR/ipsettest.c $TMPDIR/ipsettest
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}
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check_elf()
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{
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if ${PKG_CONFIG} libelf --exists; then
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echo "HAVE_ELF:=y" >>$CONFIG
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echo "yes"
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echo 'CFLAGS += -DHAVE_ELF' "$(${PKG_CONFIG} libelf --cflags)" >> $CONFIG
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echo 'LDLIBS += ' "$(${PKG_CONFIG} libelf --libs)" >>$CONFIG
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else
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echo "no"
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fi
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}
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have_libbpf_basic()
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{
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cat >$TMPDIR/libbpf_test.c <<EOF
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#include <bpf/libbpf.h>
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int main(int argc, char **argv) {
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bpf_program__set_autoload(NULL, false);
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bpf_map__ifindex(NULL);
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bpf_map__set_pin_path(NULL, NULL);
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bpf_object__open_file(NULL, NULL);
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return 0;
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}
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EOF
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$CC -o $TMPDIR/libbpf_test $TMPDIR/libbpf_test.c $LIBBPF_CFLAGS $LIBBPF_LDLIBS >/dev/null 2>&1
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local ret=$?
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rm -f $TMPDIR/libbpf_test.c $TMPDIR/libbpf_test
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return $ret
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}
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have_libbpf_sec_name()
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{
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cat >$TMPDIR/libbpf_sec_test.c <<EOF
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#include <bpf/libbpf.h>
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int main(int argc, char **argv) {
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void *ptr;
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bpf_program__section_name(NULL);
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return 0;
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}
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EOF
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$CC -o $TMPDIR/libbpf_sec_test $TMPDIR/libbpf_sec_test.c $LIBBPF_CFLAGS $LIBBPF_LDLIBS >/dev/null 2>&1
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local ret=$?
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rm -f $TMPDIR/libbpf_sec_test.c $TMPDIR/libbpf_sec_test
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return $ret
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}
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check_force_libbpf_on()
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{
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# if set LIBBPF_FORCE=on but no libbpf support, just exist the config
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# process to make sure we don't build without libbpf.
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if [ "$LIBBPF_FORCE" = on ]; then
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echo " LIBBPF_FORCE=on set, but couldn't find a usable libbpf"
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exit 1
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fi
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}
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check_libbpf()
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{
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# if set LIBBPF_FORCE=off, disable libbpf entirely
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if [ "$LIBBPF_FORCE" = off ]; then
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echo "no"
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return
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fi
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if ! ${PKG_CONFIG} libbpf --exists && [ -z "$LIBBPF_DIR" ] ; then
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echo "no"
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check_force_libbpf_on
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return
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fi
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if [ $(uname -m) = x86_64 ]; then
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local LIBBPF_LIBDIR="${LIBBPF_DIR}/usr/lib64"
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else
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local LIBBPF_LIBDIR="${LIBBPF_DIR}/usr/lib"
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fi
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if [ -n "$LIBBPF_DIR" ]; then
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LIBBPF_CFLAGS="-I${LIBBPF_DIR}/usr/include"
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LIBBPF_LDLIBS="${LIBBPF_LIBDIR}/libbpf.a -lz -lelf"
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LIBBPF_VERSION=$(PKG_CONFIG_LIBDIR=${LIBBPF_LIBDIR}/pkgconfig ${PKG_CONFIG} libbpf --modversion)
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else
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LIBBPF_CFLAGS=$(${PKG_CONFIG} libbpf --cflags)
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LIBBPF_LDLIBS=$(${PKG_CONFIG} libbpf --libs)
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LIBBPF_VERSION=$(${PKG_CONFIG} libbpf --modversion)
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fi
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if ! have_libbpf_basic; then
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echo "no"
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echo " libbpf version $LIBBPF_VERSION is too low, please update it to at least 0.1.0"
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check_force_libbpf_on
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return
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else
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echo "HAVE_LIBBPF:=y" >> $CONFIG
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echo 'CFLAGS += -DHAVE_LIBBPF ' $LIBBPF_CFLAGS >> $CONFIG
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echo "CFLAGS += -DLIBBPF_VERSION=\\\"$LIBBPF_VERSION\\\"" >> $CONFIG
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LIBBPF_MAJOR=$(IFS="."; set $LIBBPF_VERSION; echo $1)
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LIBBPF_MINOR=$(IFS="."; set $LIBBPF_VERSION; echo $2)
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if [ "$LIBBPF_MAJOR" -eq 0 -a "$LIBBPF_MINOR" -lt 7 ]; then
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# Newer libbpf versions provide these defines in the bpf/libbpf_version.h header.
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echo "CFLAGS += -DLIBBPF_MAJOR_VERSION=$LIBBPF_MAJOR -DLIBBPF_MINOR_VERSION=$LIBBPF_MINOR" >> $CONFIG
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fi
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echo 'LDLIBS += ' $LIBBPF_LDLIBS >> $CONFIG
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if [ -z "$LIBBPF_DIR" ]; then
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echo "CFLAGS += -DLIBBPF_DYNAMIC" >> $CONFIG
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fi
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fi
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# bpf_program__title() is deprecated since libbpf 0.2.0, use
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# bpf_program__section_name() instead if we support
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if have_libbpf_sec_name; then
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echo "HAVE_LIBBPF_SECTION_NAME:=y" >> $CONFIG
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echo 'CFLAGS += -DHAVE_LIBBPF_SECTION_NAME ' >> $CONFIG
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fi
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echo "yes"
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echo " libbpf version $LIBBPF_VERSION"
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}
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check_selinux()
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# SELinux is a compile time option in the ss utility
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{
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if ${PKG_CONFIG} libselinux --exists; then
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echo "HAVE_SELINUX:=y" >>$CONFIG
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echo "yes"
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echo 'LDLIBS +=' "$(${PKG_CONFIG} --libs libselinux)" >>$CONFIG
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echo 'CFLAGS += -DHAVE_SELINUX' "$(${PKG_CONFIG} --cflags libselinux)" >>$CONFIG
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else
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echo "no"
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fi
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}
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check_tirpc()
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{
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if ${PKG_CONFIG} libtirpc --exists; then
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echo "HAVE_RPC:=y" >>$CONFIG
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echo "yes"
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echo 'LDLIBS +=' "$(${PKG_CONFIG} --libs libtirpc)" >>$CONFIG
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echo 'CFLAGS += -DHAVE_RPC' "$(${PKG_CONFIG} --cflags libtirpc)" >>$CONFIG
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else
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echo "no"
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fi
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}
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check_mnl()
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{
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if ${PKG_CONFIG} libmnl --exists; then
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echo "HAVE_MNL:=y" >>$CONFIG
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echo "yes"
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echo 'CFLAGS += -DHAVE_LIBMNL' "$(${PKG_CONFIG} libmnl --cflags)" >>$CONFIG
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echo 'LDLIBS +=' "$(${PKG_CONFIG} libmnl --libs)" >> $CONFIG
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else
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echo "no"
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fi
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}
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check_berkeley_db()
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{
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cat >$TMPDIR/dbtest.c <<EOF
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#include <fcntl.h>
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#include <stdlib.h>
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#include <db_185.h>
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int main(int argc, char **argv) {
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dbopen("/tmp/xxx_test_db.db", O_CREAT|O_RDWR, 0644, DB_HASH, NULL);
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return 0;
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}
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EOF
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if $CC -I$INCLUDE -o $TMPDIR/dbtest $TMPDIR/dbtest.c -ldb >/dev/null 2>&1; then
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echo "HAVE_BERKELEY_DB:=y" >>$CONFIG
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echo "yes"
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else
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echo "no"
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fi
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rm -f $TMPDIR/dbtest.c $TMPDIR/dbtest
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}
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check_strlcpy()
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{
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cat >$TMPDIR/strtest.c <<EOF
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#define _GNU_SOURCE
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#include <string.h>
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int main(int argc, char **argv) {
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char dst[10];
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strlcpy(dst, "test", sizeof(dst));
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return 0;
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}
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EOF
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if $CC -I$INCLUDE -o $TMPDIR/strtest $TMPDIR/strtest.c >/dev/null 2>&1; then
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echo "no"
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else
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if ${PKG_CONFIG} libbsd --exists; then
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echo 'CFLAGS += -DHAVE_LIBBSD' "$(${PKG_CONFIG} libbsd --cflags)" >>$CONFIG
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echo 'LDLIBS +=' "$(${PKG_CONFIG} libbsd --libs)" >> $CONFIG
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echo "no"
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else
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echo 'CFLAGS += -DNEED_STRLCPY' >>$CONFIG
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echo "yes"
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fi
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fi
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rm -f $TMPDIR/strtest.c $TMPDIR/strtest
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}
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check_cap()
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{
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if ${PKG_CONFIG} libcap --exists; then
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echo "HAVE_CAP:=y" >>$CONFIG
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echo "yes"
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echo 'CFLAGS += -DHAVE_LIBCAP' "$(${PKG_CONFIG} libcap --cflags)" >>$CONFIG
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echo 'LDLIBS +=' "$(${PKG_CONFIG} libcap --libs)" >> $CONFIG
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else
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echo "no"
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fi
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}
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check_color()
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{
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case "$COLOR" in
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never)
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echo 'CONF_COLOR:=COLOR_OPT_NEVER' >> $CONFIG
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echo 'never'
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;;
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auto)
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echo 'CONF_COLOR:=COLOR_OPT_AUTO' >> $CONFIG
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echo 'auto'
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;;
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always)
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echo 'CONF_COLOR:=COLOR_OPT_ALWAYS' >> $CONFIG
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echo 'always'
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;;
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esac
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}
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quiet_config()
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{
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cat <<EOF
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# user can control verbosity similar to kernel builds (e.g., V=1)
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ifeq ("\$(origin V)", "command line")
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VERBOSE = \$(V)
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endif
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ifndef VERBOSE
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VERBOSE = 0
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endif
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ifeq (\$(VERBOSE),1)
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Q =
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else
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Q = @
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endif
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ifeq (\$(VERBOSE), 0)
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QUIET_CC = @echo ' CC '\$@;
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QUIET_AR = @echo ' AR '\$@;
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QUIET_LINK = @echo ' LINK '\$@;
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QUIET_YACC = @echo ' YACC '\$@;
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QUIET_LEX = @echo ' LEX '\$@;
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endif
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EOF
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}
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usage()
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{
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cat <<EOF
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Usage: $0 [OPTIONS]
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--color <never|auto|always> Default color output configuration. Available options:
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never: color output is disabled (default)
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auto: color output is enabled if stdout is a terminal
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always: color output is enabled regardless of stdout state
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--include_dir <dir> Path to iproute2 include dir
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--libdir <dir> Path to iproute2 lib dir
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--libbpf_dir <dir> Path to libbpf DESTDIR
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--libbpf_force <on|off> Enable/disable libbpf by force. Available options:
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on: require link against libbpf, quit config if no libbpf support
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|
off: disable libbpf probing
|
|
--prefix <dir> Path prefix of the lib files to install
|
|
-h | --help Show this usage info
|
|
EOF
|
|
exit $1
|
|
}
|
|
|
|
# Compat with the old INCLUDE path setting method.
|
|
if [ $# -eq 1 ] && [ "$(echo $1 | cut -c 1)" != '-' ]; then
|
|
INCLUDE="$1"
|
|
else
|
|
while [ "$#" -gt 0 ]; do
|
|
case "$1" in
|
|
--color)
|
|
shift
|
|
COLOR="$1" ;;
|
|
--color=*)
|
|
COLOR="${1#*=}" ;;
|
|
--include_dir)
|
|
shift
|
|
INCLUDE="$1" ;;
|
|
--include_dir=*)
|
|
INCLUDE="${1#*=}" ;;
|
|
--libdir)
|
|
shift
|
|
LIBDIR="$1" ;;
|
|
--libdir=*)
|
|
LIBDIR="${1#*=}" ;;
|
|
--libbpf_dir)
|
|
shift
|
|
LIBBPF_DIR="$1" ;;
|
|
--libbpf_dir=*)
|
|
LIBBPF_DIR="${1#*=}" ;;
|
|
--libbpf_force)
|
|
shift
|
|
LIBBPF_FORCE="$1" ;;
|
|
--libbpf_force=*)
|
|
LIBBPF_FORCE="${1#*=}" ;;
|
|
--prefix)
|
|
shift
|
|
PREFIX="$1" ;;
|
|
--prefix=*)
|
|
PREFIX="${1#*=}" ;;
|
|
-h | --help)
|
|
usage 0 ;;
|
|
--*)
|
|
;;
|
|
*)
|
|
usage 1 ;;
|
|
esac
|
|
[ "$#" -gt 0 ] && shift
|
|
done
|
|
fi
|
|
|
|
case "$COLOR" in
|
|
never) ;;
|
|
auto) ;;
|
|
always) ;;
|
|
*) usage 1 ;;
|
|
esac
|
|
[ -d "$INCLUDE" ] || usage 1
|
|
if [ "${LIBBPF_DIR-unused}" != "unused" ]; then
|
|
[ -d "$LIBBPF_DIR" ] || usage 1
|
|
fi
|
|
if [ "${LIBBPF_FORCE-unused}" != "unused" ]; then
|
|
if [ "$LIBBPF_FORCE" != 'on' ] && [ "$LIBBPF_FORCE" != 'off' ]; then
|
|
usage 1
|
|
fi
|
|
fi
|
|
[ -z "$PREFIX" ] && usage 1
|
|
[ -z "$LIBDIR" ] && usage 1
|
|
|
|
echo "# Generated config based on" $INCLUDE >$CONFIG
|
|
quiet_config >> $CONFIG
|
|
|
|
check_toolchain
|
|
|
|
echo "TC schedulers"
|
|
|
|
check_xtables
|
|
if ! grep -q TC_CONFIG_NO_XT $CONFIG; then
|
|
echo -n " IPT "
|
|
check_xt
|
|
check_xt_old
|
|
check_xt_old_internal_h
|
|
|
|
echo -n " IPSET "
|
|
check_ipset
|
|
fi
|
|
|
|
echo
|
|
check_lib_dir
|
|
|
|
echo -n "libc has setns: "
|
|
check_setns
|
|
|
|
echo -n "libc has name_to_handle_at: "
|
|
check_name_to_handle_at
|
|
|
|
echo -n "SELinux support: "
|
|
check_selinux
|
|
|
|
echo -n "libtirpc support: "
|
|
check_tirpc
|
|
|
|
echo -n "libbpf support: "
|
|
check_libbpf
|
|
|
|
echo -n "ELF support: "
|
|
check_elf
|
|
|
|
echo -n "libmnl support: "
|
|
check_mnl
|
|
|
|
echo -n "Berkeley DB: "
|
|
check_berkeley_db
|
|
|
|
echo -n "need for strlcpy: "
|
|
check_strlcpy
|
|
|
|
echo -n "libcap support: "
|
|
check_cap
|
|
|
|
echo -n "color output: "
|
|
check_color
|
|
|
|
echo >> $CONFIG
|
|
echo "%.o: %.c" >> $CONFIG
|
|
echo ' $(QUIET_CC)$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(CPPFLAGS) -c -o $@ $<' >> $CONFIG
|