iproute2/configure
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   1#!/bin/sh
   2# SPDX-License-Identifier: GPL-2.0
   3# This is not an autoconf generated configure
   4
   5INCLUDE="$PWD/include"
   6
   7# Output file which is input to Makefile
   8CONFIG=config.mk
   9
  10# Make a temp directory in build tree.
  11TMPDIR=$(mktemp -d config.XXXXXX)
  12trap 'status=$?; rm -rf $TMPDIR; exit $status' EXIT HUP INT QUIT TERM
  13
  14check_toolchain()
  15{
  16    : ${PKG_CONFIG:=pkg-config}
  17    : ${AR=ar}
  18    : ${CC=gcc}
  19    : ${YACC=bison}
  20    echo "PKG_CONFIG:=${PKG_CONFIG}" >>$CONFIG
  21    echo "AR:=${AR}" >>$CONFIG
  22    echo "CC:=${CC}" >>$CONFIG
  23    echo "YACC:=${YACC}" >>$CONFIG
  24}
  25
  26check_atm()
  27{
  28    cat >$TMPDIR/atmtest.c <<EOF
  29#include <atm.h>
  30int main(int argc, char **argv) {
  31        struct atm_qos qos;
  32        (void) text2qos("aal5,ubr:sdu=9180,rx:none",&qos,0);
  33        return 0;
  34}
  35EOF
  36
  37    if $CC -I$INCLUDE -o $TMPDIR/atmtest $TMPDIR/atmtest.c -latm >/dev/null 2>&1; then
  38        echo "TC_CONFIG_ATM:=y" >>$CONFIG
  39        echo yes
  40    else
  41        echo no
  42    fi
  43    rm -f $TMPDIR/atmtest.c $TMPDIR/atmtest
  44}
  45
  46check_xtables()
  47{
  48        if ! ${PKG_CONFIG} xtables --exists; then
  49                echo "TC_CONFIG_NO_XT:=y" >>$CONFIG
  50        fi
  51}
  52
  53check_xt()
  54{
  55    #check if we have xtables from iptables >= 1.4.5.
  56    cat >$TMPDIR/ipttest.c <<EOF
  57#include <xtables.h>
  58#include <linux/netfilter.h>
  59static struct xtables_globals test_globals = {
  60        .option_offset = 0,
  61        .program_name = "tc-ipt",
  62        .program_version = XTABLES_VERSION,
  63        .orig_opts = NULL,
  64        .opts = NULL,
  65        .exit_err = NULL,
  66};
  67
  68int main(int argc, char **argv)
  69{
  70        xtables_init_all(&test_globals, NFPROTO_IPV4);
  71        return 0;
  72}
  73EOF
  74
  75    if $CC -I$INCLUDE $IPTC -o $TMPDIR/ipttest $TMPDIR/ipttest.c $IPTL \
  76        $(${PKG_CONFIG} xtables --cflags --libs) -ldl >/dev/null 2>&1; then
  77        echo "TC_CONFIG_XT:=y" >>$CONFIG
  78        echo "using xtables"
  79    fi
  80    rm -f $TMPDIR/ipttest.c $TMPDIR/ipttest
  81}
  82
  83check_xt_old()
  84{
  85    # bail if previous XT checks has already succeeded.
  86    grep -q TC_CONFIG_XT $CONFIG && return
  87
  88    #check if we don't need our internal header ..
  89    cat >$TMPDIR/ipttest.c <<EOF
  90#include <xtables.h>
  91char *lib_dir;
  92unsigned int global_option_offset = 0;
  93const char *program_version = XTABLES_VERSION;
  94const char *program_name = "tc-ipt";
  95struct afinfo afinfo = {
  96        .libprefix      = "libxt_",
  97};
  98
  99void exit_error(enum exittype status, const char *msg, ...)
 100{
 101}
 102
 103int main(int argc, char **argv) {
 104
 105        return 0;
 106}
 107
 108EOF
 109
 110    if $CC -I$INCLUDE $IPTC -o $TMPDIR/ipttest $TMPDIR/ipttest.c $IPTL -ldl >/dev/null 2>&1; then
 111        echo "TC_CONFIG_XT_OLD:=y" >>$CONFIG
 112        echo "using old xtables (no need for xt-internal.h)"
 113    fi
 114    rm -f $TMPDIR/ipttest.c $TMPDIR/ipttest
 115}
 116
 117check_xt_old_internal_h()
 118{
 119    # bail if previous XT checks has already succeeded.
 120    grep -q TC_CONFIG_XT $CONFIG && return
 121
 122    #check if we need our own internal.h
 123    cat >$TMPDIR/ipttest.c <<EOF
 124#include <xtables.h>
 125#include "xt-internal.h"
 126char *lib_dir;
 127unsigned int global_option_offset = 0;
 128const char *program_version = XTABLES_VERSION;
 129const char *program_name = "tc-ipt";
 130struct afinfo afinfo = {
 131        .libprefix      = "libxt_",
 132};
 133
 134void exit_error(enum exittype status, const char *msg, ...)
 135{
 136}
 137
 138int main(int argc, char **argv) {
 139
 140        return 0;
 141}
 142
 143EOF
 144        if $CC -I$INCLUDE $IPTC -o $TMPDIR/ipttest $TMPDIR/ipttest.c $IPTL -ldl >/dev/null 2>&1; then
 145            echo "using old xtables with xt-internal.h"
 146            echo "TC_CONFIG_XT_OLD_H:=y" >>$CONFIG
 147        fi
 148        rm -f $TMPDIR/ipttest.c $TMPDIR/ipttest
 149}
 150
 151check_ipt()
 152{
 153        if ! grep TC_CONFIG_XT $CONFIG > /dev/null; then
 154                echo "using iptables"
 155        fi
 156}
 157
 158check_ipt_lib_dir()
 159{
 160        IPT_LIB_DIR=$(${PKG_CONFIG} --variable=xtlibdir xtables)
 161        if [ -n "$IPT_LIB_DIR" ]; then
 162                echo $IPT_LIB_DIR
 163                echo "IPT_LIB_DIR:=$IPT_LIB_DIR" >> $CONFIG
 164                return
 165        fi
 166
 167        for dir in /lib /usr/lib /usr/local/lib; do
 168                for file in "xtables" "iptables"; do
 169                        file="$dir/$file/lib*t_*so"
 170                        if [ -f $file ]; then
 171                                echo ${file%/*}
 172                                echo "IPT_LIB_DIR:=${file%/*}" >> $CONFIG
 173                                return
 174                        fi
 175                done
 176        done
 177        echo "not found!"
 178}
 179
 180check_setns()
 181{
 182    cat >$TMPDIR/setnstest.c <<EOF
 183#include <sched.h>
 184int main(int argc, char **argv)
 185{
 186        (void)setns(0,0);
 187        return 0;
 188}
 189EOF
 190    if $CC -I$INCLUDE -o $TMPDIR/setnstest $TMPDIR/setnstest.c >/dev/null 2>&1; then
 191        echo "IP_CONFIG_SETNS:=y" >>$CONFIG
 192        echo "yes"
 193        echo "CFLAGS += -DHAVE_SETNS" >>$CONFIG
 194    else
 195        echo "no"
 196    fi
 197    rm -f $TMPDIR/setnstest.c $TMPDIR/setnstest
 198}
 199
 200check_name_to_handle_at()
 201{
 202    cat >$TMPDIR/name_to_handle_at_test.c <<EOF
 203#define _GNU_SOURCE
 204#include <sys/types.h>
 205#include <sys/stat.h>
 206#include <fcntl.h>
 207int main(int argc, char **argv)
 208{
 209        struct file_handle *fhp;
 210        int mount_id, flags, dirfd;
 211        char *pathname;
 212        name_to_handle_at(dirfd, pathname, fhp, &mount_id, flags);
 213        return 0;
 214}
 215EOF
 216    if $CC -I$INCLUDE -o $TMPDIR/name_to_handle_at_test $TMPDIR/name_to_handle_at_test.c >/dev/null 2>&1; then
 217        echo "yes"
 218        echo "CFLAGS += -DHAVE_HANDLE_AT" >>$CONFIG
 219    else
 220        echo "no"
 221    fi
 222    rm -f $TMPDIR/name_to_handle_at_test.c $TMPDIR/name_to_handle_at_test
 223}
 224
 225check_ipset()
 226{
 227    cat >$TMPDIR/ipsettest.c <<EOF
 228#include <linux/netfilter/ipset/ip_set.h>
 229#ifndef IP_SET_INVALID
 230#define IPSET_DIM_MAX 3
 231typedef unsigned short ip_set_id_t;
 232#endif
 233#include <linux/netfilter/xt_set.h>
 234
 235struct xt_set_info info;
 236#if IPSET_PROTOCOL == 6 || IPSET_PROTOCOL == 7
 237int main(void)
 238{
 239        return IPSET_MAXNAMELEN;
 240}
 241#else
 242#error unknown ipset version
 243#endif
 244EOF
 245
 246    if $CC -I$INCLUDE -o $TMPDIR/ipsettest $TMPDIR/ipsettest.c >/dev/null 2>&1; then
 247        echo "TC_CONFIG_IPSET:=y" >>$CONFIG
 248        echo "yes"
 249    else
 250        echo "no"
 251    fi
 252    rm -f $TMPDIR/ipsettest.c $TMPDIR/ipsettest
 253}
 254
 255check_elf()
 256{
 257    if ${PKG_CONFIG} libelf --exists; then
 258        echo "HAVE_ELF:=y" >>$CONFIG
 259        echo "yes"
 260
 261        echo 'CFLAGS += -DHAVE_ELF' `${PKG_CONFIG} libelf --cflags` >> $CONFIG
 262        echo 'LDLIBS += ' `${PKG_CONFIG} libelf --libs` >>$CONFIG
 263    else
 264        echo "no"
 265    fi
 266}
 267
 268have_libbpf_basic()
 269{
 270    cat >$TMPDIR/libbpf_test.c <<EOF
 271#include <bpf/libbpf.h>
 272int main(int argc, char **argv) {
 273    bpf_program__set_autoload(NULL, false);
 274    bpf_map__ifindex(NULL);
 275    bpf_map__set_pin_path(NULL, NULL);
 276    bpf_object__open_file(NULL, NULL);
 277    return 0;
 278}
 279EOF
 280
 281    $CC -o $TMPDIR/libbpf_test $TMPDIR/libbpf_test.c $LIBBPF_CFLAGS $LIBBPF_LDLIBS >/dev/null 2>&1
 282    local ret=$?
 283
 284    rm -f $TMPDIR/libbpf_test.c $TMPDIR/libbpf_test
 285    return $ret
 286}
 287
 288have_libbpf_sec_name()
 289{
 290    cat >$TMPDIR/libbpf_sec_test.c <<EOF
 291#include <bpf/libbpf.h>
 292int main(int argc, char **argv) {
 293    void *ptr;
 294    bpf_program__section_name(NULL);
 295    return 0;
 296}
 297EOF
 298
 299    $CC -o $TMPDIR/libbpf_sec_test $TMPDIR/libbpf_sec_test.c $LIBBPF_CFLAGS $LIBBPF_LDLIBS >/dev/null 2>&1
 300    local ret=$?
 301
 302    rm -f $TMPDIR/libbpf_sec_test.c $TMPDIR/libbpf_sec_test
 303    return $ret
 304}
 305
 306check_force_libbpf_on()
 307{
 308    # if set LIBBPF_FORCE=on but no libbpf support, just exist the config
 309    # process to make sure we don't build without libbpf.
 310    if [ "$LIBBPF_FORCE" = on ]; then
 311        echo "  LIBBPF_FORCE=on set, but couldn't find a usable libbpf"
 312        exit 1
 313    fi
 314}
 315
 316check_libbpf()
 317{
 318    # if set LIBBPF_FORCE=off, disable libbpf entirely
 319    if [ "$LIBBPF_FORCE" = off ]; then
 320        echo "no"
 321        return
 322    fi
 323
 324    if ! ${PKG_CONFIG} libbpf --exists && [ -z "$LIBBPF_DIR" ] ; then
 325        echo "no"
 326        check_force_libbpf_on
 327        return
 328    fi
 329
 330    if [ $(uname -m) = x86_64 ]; then
 331        local LIBBPF_LIBDIR="${LIBBPF_DIR}/usr/lib64"
 332    else
 333        local LIBBPF_LIBDIR="${LIBBPF_DIR}/usr/lib"
 334    fi
 335
 336    if [ -n "$LIBBPF_DIR" ]; then
 337        LIBBPF_CFLAGS="-I${LIBBPF_DIR}/usr/include"
 338        LIBBPF_LDLIBS="${LIBBPF_LIBDIR}/libbpf.a -lz -lelf"
 339        LIBBPF_VERSION=$(PKG_CONFIG_LIBDIR=${LIBBPF_LIBDIR}/pkgconfig ${PKG_CONFIG} libbpf --modversion)
 340    else
 341        LIBBPF_CFLAGS=$(${PKG_CONFIG} libbpf --cflags)
 342        LIBBPF_LDLIBS=$(${PKG_CONFIG} libbpf --libs)
 343        LIBBPF_VERSION=$(${PKG_CONFIG} libbpf --modversion)
 344    fi
 345
 346    if ! have_libbpf_basic; then
 347        echo "no"
 348        echo "  libbpf version $LIBBPF_VERSION is too low, please update it to at least 0.1.0"
 349        check_force_libbpf_on
 350        return
 351    else
 352        echo "HAVE_LIBBPF:=y" >> $CONFIG
 353        echo 'CFLAGS += -DHAVE_LIBBPF ' $LIBBPF_CFLAGS >> $CONFIG
 354        echo "CFLAGS += -DLIBBPF_VERSION=\\\"$LIBBPF_VERSION\\\"" >> $CONFIG
 355        echo 'LDLIBS += ' $LIBBPF_LDLIBS >> $CONFIG
 356
 357        if [ -z "$LIBBPF_DIR" ]; then
 358            echo "CFLAGS += -DLIBBPF_DYNAMIC" >> $CONFIG
 359        fi
 360    fi
 361
 362    # bpf_program__title() is deprecated since libbpf 0.2.0, use
 363    # bpf_program__section_name() instead if we support
 364    if have_libbpf_sec_name; then
 365        echo "HAVE_LIBBPF_SECTION_NAME:=y" >> $CONFIG
 366        echo 'CFLAGS += -DHAVE_LIBBPF_SECTION_NAME ' >> $CONFIG
 367    fi
 368
 369    echo "yes"
 370    echo "      libbpf version $LIBBPF_VERSION"
 371}
 372
 373check_selinux()
 374# SELinux is a compile time option in the ss utility
 375{
 376        if ${PKG_CONFIG} libselinux --exists; then
 377                echo "HAVE_SELINUX:=y" >>$CONFIG
 378                echo "yes"
 379
 380                echo 'LDLIBS +=' `${PKG_CONFIG} --libs libselinux` >>$CONFIG
 381                echo 'CFLAGS += -DHAVE_SELINUX' `${PKG_CONFIG} --cflags libselinux` >>$CONFIG
 382        else
 383                echo "no"
 384        fi
 385}
 386
 387check_mnl()
 388{
 389        if ${PKG_CONFIG} libmnl --exists; then
 390                echo "HAVE_MNL:=y" >>$CONFIG
 391                echo "yes"
 392
 393                echo 'CFLAGS += -DHAVE_LIBMNL' `${PKG_CONFIG} libmnl --cflags` >>$CONFIG
 394                echo 'LDLIBS +=' `${PKG_CONFIG} libmnl --libs` >> $CONFIG
 395        else
 396                echo "no"
 397        fi
 398}
 399
 400check_berkeley_db()
 401{
 402    cat >$TMPDIR/dbtest.c <<EOF
 403#include <fcntl.h>
 404#include <stdlib.h>
 405#include <db_185.h>
 406int main(int argc, char **argv) {
 407        dbopen("/tmp/xxx_test_db.db", O_CREAT|O_RDWR, 0644, DB_HASH, NULL);
 408        return 0;
 409}
 410EOF
 411    if $CC -I$INCLUDE -o $TMPDIR/dbtest $TMPDIR/dbtest.c -ldb >/dev/null 2>&1; then
 412        echo "HAVE_BERKELEY_DB:=y" >>$CONFIG
 413        echo "yes"
 414    else
 415        echo "no"
 416    fi
 417    rm -f $TMPDIR/dbtest.c $TMPDIR/dbtest
 418}
 419
 420check_strlcpy()
 421{
 422    cat >$TMPDIR/strtest.c <<EOF
 423#include <string.h>
 424int main(int argc, char **argv) {
 425        char dst[10];
 426        strlcpy(dst, "test", sizeof(dst));
 427        return 0;
 428}
 429EOF
 430    if $CC -I$INCLUDE -o $TMPDIR/strtest $TMPDIR/strtest.c >/dev/null 2>&1; then
 431        echo "no"
 432    else
 433        if ${PKG_CONFIG} libbsd --exists; then
 434                echo 'CFLAGS += -DHAVE_LIBBSD' `${PKG_CONFIG} libbsd --cflags` >>$CONFIG
 435                echo 'LDLIBS +=' `${PKG_CONFIG} libbsd --libs` >> $CONFIG
 436                echo "no"
 437        else
 438                echo 'CFLAGS += -DNEED_STRLCPY' >>$CONFIG
 439                echo "yes"
 440        fi
 441    fi
 442    rm -f $TMPDIR/strtest.c $TMPDIR/strtest
 443}
 444
 445check_cap()
 446{
 447        if ${PKG_CONFIG} libcap --exists; then
 448                echo "HAVE_CAP:=y" >>$CONFIG
 449                echo "yes"
 450
 451                echo 'CFLAGS += -DHAVE_LIBCAP' `${PKG_CONFIG} libcap --cflags` >>$CONFIG
 452                echo 'LDLIBS +=' `${PKG_CONFIG} libcap --libs` >> $CONFIG
 453        else
 454                echo "no"
 455        fi
 456}
 457
 458quiet_config()
 459{
 460        cat <<EOF
 461# user can control verbosity similar to kernel builds (e.g., V=1)
 462ifeq ("\$(origin V)", "command line")
 463  VERBOSE = \$(V)
 464endif
 465ifndef VERBOSE
 466  VERBOSE = 0
 467endif
 468ifeq (\$(VERBOSE),1)
 469  Q =
 470else
 471  Q = @
 472endif
 473
 474ifeq (\$(VERBOSE), 0)
 475    QUIET_CC       = @echo '    CC       '\$@;
 476    QUIET_AR       = @echo '    AR       '\$@;
 477    QUIET_LINK     = @echo '    LINK     '\$@;
 478    QUIET_YACC     = @echo '    YACC     '\$@;
 479    QUIET_LEX      = @echo '    LEX      '\$@;
 480endif
 481EOF
 482}
 483
 484usage()
 485{
 486        cat <<EOF
 487Usage: $0 [OPTIONS]
 488        --include_dir           Path to iproute2 include dir
 489        --libbpf_dir            Path to libbpf DESTDIR
 490        --libbpf_force          Enable/disable libbpf by force. Available options:
 491                                  on: require link against libbpf, quit config if no libbpf support
 492                                  off: disable libbpf probing
 493        -h | --help             Show this usage info
 494EOF
 495        exit $1
 496}
 497
 498# Compat with the old INCLUDE path setting method.
 499if [ $# -eq 1 ] && [ "$(echo $1 | cut -c 1)" != '-' ]; then
 500        INCLUDE="$1"
 501else
 502        while true; do
 503                case "$1" in
 504                        --include_dir)
 505                                INCLUDE=$2
 506                                shift 2 ;;
 507                        --libbpf_dir)
 508                                LIBBPF_DIR="$2"
 509                                shift 2 ;;
 510                        --libbpf_force)
 511                                if [ "$2" != 'on' ] && [ "$2" != 'off' ]; then
 512                                        usage 1
 513                                fi
 514                                LIBBPF_FORCE=$2
 515                                shift 2 ;;
 516                        -h | --help)
 517                                usage 0 ;;
 518                        "")
 519                                break ;;
 520                        *)
 521                                shift 1 ;;
 522                esac
 523        done
 524fi
 525
 526echo "# Generated config based on" $INCLUDE >$CONFIG
 527quiet_config >> $CONFIG
 528
 529check_toolchain
 530
 531echo "TC schedulers"
 532
 533echo -n " ATM   "
 534check_atm
 535
 536check_xtables
 537if ! grep -q TC_CONFIG_NO_XT $CONFIG; then
 538        echo -n " IPT   "
 539        check_xt
 540        check_xt_old
 541        check_xt_old_internal_h
 542        check_ipt
 543
 544        echo -n " IPSET  "
 545        check_ipset
 546fi
 547
 548echo
 549if ! grep -q TC_CONFIG_NO_XT $CONFIG; then
 550        echo -n "iptables modules directory: "
 551        check_ipt_lib_dir
 552fi
 553
 554echo -n "libc has setns: "
 555check_setns
 556
 557echo -n "libc has name_to_handle_at: "
 558check_name_to_handle_at
 559
 560echo -n "SELinux support: "
 561check_selinux
 562
 563echo -n "libbpf support: "
 564check_libbpf
 565
 566echo -n "ELF support: "
 567check_elf
 568
 569echo -n "libmnl support: "
 570check_mnl
 571
 572echo -n "Berkeley DB: "
 573check_berkeley_db
 574
 575echo -n "need for strlcpy: "
 576check_strlcpy
 577
 578echo -n "libcap support: "
 579check_cap
 580
 581echo >> $CONFIG
 582echo "%.o: %.c" >> $CONFIG
 583echo '  $(QUIET_CC)$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(CPPFLAGS) -c -o $@ $<' >> $CONFIG
 584
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