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="$PWD/include"
   6PREFIX="/usr"
   7LIBDIR="\${prefix}/lib"
   8
   9# Output file which is input to Makefile
  10CONFIG=config.mk
  11
  12# Make a temp directory in build tree.
  13TMPDIR=$(mktemp -d config.XXXXXX)
  14trap 'status=$?; rm -rf $TMPDIR; exit $status' EXIT HUP INT QUIT TERM
  15
  16check_toolchain()
  17{
  18    : ${PKG_CONFIG:=pkg-config}
  19    : ${AR=ar}
  20    : ${CC=gcc}
  21    : ${YACC=bison}
  22    echo "PKG_CONFIG:=${PKG_CONFIG}" >>$CONFIG
  23    echo "AR:=${AR}" >>$CONFIG
  24    echo "CC:=${CC}" >>$CONFIG
  25    echo "YACC:=${YACC}" >>$CONFIG
  26}
  27
  28check_atm()
  29{
  30    cat >$TMPDIR/atmtest.c <<EOF
  31#include <atm.h>
  32int main(int argc, char **argv) {
  33        struct atm_qos qos;
  34        (void) text2qos("aal5,ubr:sdu=9180,rx:none",&qos,0);
  35        return 0;
  36}
  37EOF
  38
  39    if $CC -I$INCLUDE -o $TMPDIR/atmtest $TMPDIR/atmtest.c -latm >/dev/null 2>&1; then
  40        echo "TC_CONFIG_ATM:=y" >>$CONFIG
  41        echo yes
  42    else
  43        echo no
  44    fi
  45    rm -f $TMPDIR/atmtest.c $TMPDIR/atmtest
  46}
  47
  48check_xtables()
  49{
  50        if ! ${PKG_CONFIG} xtables --exists; then
  51                echo "TC_CONFIG_NO_XT:=y" >>$CONFIG
  52        fi
  53}
  54
  55check_xt()
  56{
  57    #check if we have xtables from iptables >= 1.4.5.
  58    cat >$TMPDIR/ipttest.c <<EOF
  59#include <xtables.h>
  60#include <linux/netfilter.h>
  61static struct xtables_globals test_globals = {
  62        .option_offset = 0,
  63        .program_name = "tc-ipt",
  64        .program_version = XTABLES_VERSION,
  65        .orig_opts = NULL,
  66        .opts = NULL,
  67        .exit_err = NULL,
  68};
  69
  70int main(int argc, char **argv)
  71{
  72        xtables_init_all(&test_globals, NFPROTO_IPV4);
  73        return 0;
  74}
  75EOF
  76
  77    if $CC -I$INCLUDE $IPTC -o $TMPDIR/ipttest $TMPDIR/ipttest.c $IPTL \
  78        $(${PKG_CONFIG} xtables --cflags --libs) -ldl >/dev/null 2>&1; then
  79        echo "TC_CONFIG_XT:=y" >>$CONFIG
  80        echo "using xtables"
  81    fi
  82    rm -f $TMPDIR/ipttest.c $TMPDIR/ipttest
  83}
  84
  85check_xt_old()
  86{
  87    # bail if previous XT checks has already succeeded.
  88    grep -q TC_CONFIG_XT $CONFIG && return
  89
  90    #check if we don't need our internal header ..
  91    cat >$TMPDIR/ipttest.c <<EOF
  92#include <xtables.h>
  93char *lib_dir;
  94unsigned int global_option_offset = 0;
  95const char *program_version = XTABLES_VERSION;
  96const char *program_name = "tc-ipt";
  97struct afinfo afinfo = {
  98        .libprefix      = "libxt_",
  99};
 100
 101void exit_error(enum exittype status, const char *msg, ...)
 102{
 103}
 104
 105int main(int argc, char **argv) {
 106
 107        return 0;
 108}
 109
 110EOF
 111
 112    if $CC -I$INCLUDE $IPTC -o $TMPDIR/ipttest $TMPDIR/ipttest.c $IPTL -ldl >/dev/null 2>&1; then
 113        echo "TC_CONFIG_XT_OLD:=y" >>$CONFIG
 114        echo "using old xtables (no need for xt-internal.h)"
 115    fi
 116    rm -f $TMPDIR/ipttest.c $TMPDIR/ipttest
 117}
 118
 119check_xt_old_internal_h()
 120{
 121    # bail if previous XT checks has already succeeded.
 122    grep -q TC_CONFIG_XT $CONFIG && return
 123
 124    #check if we need our own internal.h
 125    cat >$TMPDIR/ipttest.c <<EOF
 126#include <xtables.h>
 127#include "xt-internal.h"
 128char *lib_dir;
 129unsigned int global_option_offset = 0;
 130const char *program_version = XTABLES_VERSION;
 131const char *program_name = "tc-ipt";
 132struct afinfo afinfo = {
 133        .libprefix      = "libxt_",
 134};
 135
 136void exit_error(enum exittype status, const char *msg, ...)
 137{
 138}
 139
 140int main(int argc, char **argv) {
 141
 142        return 0;
 143}
 144
 145EOF
 146        if $CC -I$INCLUDE $IPTC -o $TMPDIR/ipttest $TMPDIR/ipttest.c $IPTL -ldl >/dev/null 2>&1; then
 147            echo "using old xtables with xt-internal.h"
 148            echo "TC_CONFIG_XT_OLD_H:=y" >>$CONFIG
 149        fi
 150        rm -f $TMPDIR/ipttest.c $TMPDIR/ipttest
 151}
 152
 153check_lib_dir()
 154{
 155        LIBDIR=$(echo $LIBDIR | sed "s|\${prefix}|$PREFIX|")
 156
 157        echo -n "lib directory: "
 158        echo "$LIBDIR"
 159        echo "LIBDIR:=$LIBDIR" >> $CONFIG
 160}
 161
 162check_ipt()
 163{
 164        if ! grep TC_CONFIG_XT $CONFIG > /dev/null; then
 165                echo "using iptables"
 166        fi
 167}
 168
 169check_ipt_lib_dir()
 170{
 171        IPT_LIB_DIR=$(${PKG_CONFIG} --variable=xtlibdir xtables)
 172        if [ -n "$IPT_LIB_DIR" ]; then
 173                echo $IPT_LIB_DIR
 174                echo "IPT_LIB_DIR:=$IPT_LIB_DIR" >> $CONFIG
 175                return
 176        fi
 177
 178        for dir in /lib /usr/lib /usr/local/lib; do
 179                for file in "xtables" "iptables"; do
 180                        file="$dir/$file/lib*t_*so"
 181                        if [ -f $file ]; then
 182                                echo ${file%/*}
 183                                echo "IPT_LIB_DIR:=${file%/*}" >> $CONFIG
 184                                return
 185                        fi
 186                done
 187        done
 188        echo "not found!"
 189}
 190
 191check_setns()
 192{
 193    cat >$TMPDIR/setnstest.c <<EOF
 194#include <sched.h>
 195int main(int argc, char **argv)
 196{
 197        (void)setns(0,0);
 198        return 0;
 199}
 200EOF
 201    if $CC -I$INCLUDE -o $TMPDIR/setnstest $TMPDIR/setnstest.c >/dev/null 2>&1; then
 202        echo "IP_CONFIG_SETNS:=y" >>$CONFIG
 203        echo "yes"
 204        echo "CFLAGS += -DHAVE_SETNS" >>$CONFIG
 205    else
 206        echo "no"
 207    fi
 208    rm -f $TMPDIR/setnstest.c $TMPDIR/setnstest
 209}
 210
 211check_name_to_handle_at()
 212{
 213    cat >$TMPDIR/name_to_handle_at_test.c <<EOF
 214#define _GNU_SOURCE
 215#include <sys/types.h>
 216#include <sys/stat.h>
 217#include <fcntl.h>
 218int main(int argc, char **argv)
 219{
 220        struct file_handle *fhp;
 221        int mount_id, flags, dirfd;
 222        char *pathname;
 223        name_to_handle_at(dirfd, pathname, fhp, &mount_id, flags);
 224        return 0;
 225}
 226EOF
 227    if $CC -I$INCLUDE -o $TMPDIR/name_to_handle_at_test $TMPDIR/name_to_handle_at_test.c >/dev/null 2>&1; then
 228        echo "yes"
 229        echo "CFLAGS += -DHAVE_HANDLE_AT" >>$CONFIG
 230    else
 231        echo "no"
 232    fi
 233    rm -f $TMPDIR/name_to_handle_at_test.c $TMPDIR/name_to_handle_at_test
 234}
 235
 236check_ipset()
 237{
 238    cat >$TMPDIR/ipsettest.c <<EOF
 239#include <linux/netfilter/ipset/ip_set.h>
 240#ifndef IP_SET_INVALID
 241#define IPSET_DIM_MAX 3
 242typedef unsigned short ip_set_id_t;
 243#endif
 244#include <linux/netfilter/xt_set.h>
 245
 246struct xt_set_info info;
 247#if IPSET_PROTOCOL == 6 || IPSET_PROTOCOL == 7
 248int main(void)
 249{
 250        return IPSET_MAXNAMELEN;
 251}
 252#else
 253#error unknown ipset version
 254#endif
 255EOF
 256
 257    if $CC -I$INCLUDE -o $TMPDIR/ipsettest $TMPDIR/ipsettest.c >/dev/null 2>&1; then
 258        echo "TC_CONFIG_IPSET:=y" >>$CONFIG
 259        echo "yes"
 260    else
 261        echo "no"
 262    fi
 263    rm -f $TMPDIR/ipsettest.c $TMPDIR/ipsettest
 264}
 265
 266check_elf()
 267{
 268    if ${PKG_CONFIG} libelf --exists; then
 269        echo "HAVE_ELF:=y" >>$CONFIG
 270        echo "yes"
 271
 272        echo 'CFLAGS += -DHAVE_ELF' `${PKG_CONFIG} libelf --cflags` >> $CONFIG
 273        echo 'LDLIBS += ' `${PKG_CONFIG} libelf --libs` >>$CONFIG
 274    else
 275        echo "no"
 276    fi
 277}
 278
 279have_libbpf_basic()
 280{
 281    cat >$TMPDIR/libbpf_test.c <<EOF
 282#include <bpf/libbpf.h>
 283int main(int argc, char **argv) {
 284    bpf_program__set_autoload(NULL, false);
 285    bpf_map__ifindex(NULL);
 286    bpf_map__set_pin_path(NULL, NULL);
 287    bpf_object__open_file(NULL, NULL);
 288    return 0;
 289}
 290EOF
 291
 292    $CC -o $TMPDIR/libbpf_test $TMPDIR/libbpf_test.c $LIBBPF_CFLAGS $LIBBPF_LDLIBS >/dev/null 2>&1
 293    local ret=$?
 294
 295    rm -f $TMPDIR/libbpf_test.c $TMPDIR/libbpf_test
 296    return $ret
 297}
 298
 299have_libbpf_sec_name()
 300{
 301    cat >$TMPDIR/libbpf_sec_test.c <<EOF
 302#include <bpf/libbpf.h>
 303int main(int argc, char **argv) {
 304    void *ptr;
 305    bpf_program__section_name(NULL);
 306    return 0;
 307}
 308EOF
 309
 310    $CC -o $TMPDIR/libbpf_sec_test $TMPDIR/libbpf_sec_test.c $LIBBPF_CFLAGS $LIBBPF_LDLIBS >/dev/null 2>&1
 311    local ret=$?
 312
 313    rm -f $TMPDIR/libbpf_sec_test.c $TMPDIR/libbpf_sec_test
 314    return $ret
 315}
 316
 317check_force_libbpf_on()
 318{
 319    # if set LIBBPF_FORCE=on but no libbpf support, just exist the config
 320    # process to make sure we don't build without libbpf.
 321    if [ "$LIBBPF_FORCE" = on ]; then
 322        echo "  LIBBPF_FORCE=on set, but couldn't find a usable libbpf"
 323        exit 1
 324    fi
 325}
 326
 327check_libbpf()
 328{
 329    # if set LIBBPF_FORCE=off, disable libbpf entirely
 330    if [ "$LIBBPF_FORCE" = off ]; then
 331        echo "no"
 332        return
 333    fi
 334
 335    if ! ${PKG_CONFIG} libbpf --exists && [ -z "$LIBBPF_DIR" ] ; then
 336        echo "no"
 337        check_force_libbpf_on
 338        return
 339    fi
 340
 341    if [ $(uname -m) = x86_64 ]; then
 342        local LIBBPF_LIBDIR="${LIBBPF_DIR}/usr/lib64"
 343    else
 344        local LIBBPF_LIBDIR="${LIBBPF_DIR}/usr/lib"
 345    fi
 346
 347    if [ -n "$LIBBPF_DIR" ]; then
 348        LIBBPF_CFLAGS="-I${LIBBPF_DIR}/usr/include"
 349        LIBBPF_LDLIBS="${LIBBPF_LIBDIR}/libbpf.a -lz -lelf"
 350        LIBBPF_VERSION=$(PKG_CONFIG_LIBDIR=${LIBBPF_LIBDIR}/pkgconfig ${PKG_CONFIG} libbpf --modversion)
 351    else
 352        LIBBPF_CFLAGS=$(${PKG_CONFIG} libbpf --cflags)
 353        LIBBPF_LDLIBS=$(${PKG_CONFIG} libbpf --libs)
 354        LIBBPF_VERSION=$(${PKG_CONFIG} libbpf --modversion)
 355    fi
 356
 357    if ! have_libbpf_basic; then
 358        echo "no"
 359        echo "  libbpf version $LIBBPF_VERSION is too low, please update it to at least 0.1.0"
 360        check_force_libbpf_on
 361        return
 362    else
 363        echo "HAVE_LIBBPF:=y" >> $CONFIG
 364        echo 'CFLAGS += -DHAVE_LIBBPF ' $LIBBPF_CFLAGS >> $CONFIG
 365        echo "CFLAGS += -DLIBBPF_VERSION=\\\"$LIBBPF_VERSION\\\"" >> $CONFIG
 366        echo 'LDLIBS += ' $LIBBPF_LDLIBS >> $CONFIG
 367
 368        if [ -z "$LIBBPF_DIR" ]; then
 369            echo "CFLAGS += -DLIBBPF_DYNAMIC" >> $CONFIG
 370        fi
 371    fi
 372
 373    # bpf_program__title() is deprecated since libbpf 0.2.0, use
 374    # bpf_program__section_name() instead if we support
 375    if have_libbpf_sec_name; then
 376        echo "HAVE_LIBBPF_SECTION_NAME:=y" >> $CONFIG
 377        echo 'CFLAGS += -DHAVE_LIBBPF_SECTION_NAME ' >> $CONFIG
 378    fi
 379
 380    echo "yes"
 381    echo "      libbpf version $LIBBPF_VERSION"
 382}
 383
 384check_selinux()
 385# SELinux is a compile time option in the ss utility
 386{
 387        if ${PKG_CONFIG} libselinux --exists; then
 388                echo "HAVE_SELINUX:=y" >>$CONFIG
 389                echo "yes"
 390
 391                echo 'LDLIBS +=' `${PKG_CONFIG} --libs libselinux` >>$CONFIG
 392                echo 'CFLAGS += -DHAVE_SELINUX' `${PKG_CONFIG} --cflags libselinux` >>$CONFIG
 393        else
 394                echo "no"
 395        fi
 396}
 397
 398check_mnl()
 399{
 400        if ${PKG_CONFIG} libmnl --exists; then
 401                echo "HAVE_MNL:=y" >>$CONFIG
 402                echo "yes"
 403
 404                echo 'CFLAGS += -DHAVE_LIBMNL' `${PKG_CONFIG} libmnl --cflags` >>$CONFIG
 405                echo 'LDLIBS +=' `${PKG_CONFIG} libmnl --libs` >> $CONFIG
 406        else
 407                echo "no"
 408        fi
 409}
 410
 411check_berkeley_db()
 412{
 413    cat >$TMPDIR/dbtest.c <<EOF
 414#include <fcntl.h>
 415#include <stdlib.h>
 416#include <db_185.h>
 417int main(int argc, char **argv) {
 418        dbopen("/tmp/xxx_test_db.db", O_CREAT|O_RDWR, 0644, DB_HASH, NULL);
 419        return 0;
 420}
 421EOF
 422    if $CC -I$INCLUDE -o $TMPDIR/dbtest $TMPDIR/dbtest.c -ldb >/dev/null 2>&1; then
 423        echo "HAVE_BERKELEY_DB:=y" >>$CONFIG
 424        echo "yes"
 425    else
 426        echo "no"
 427    fi
 428    rm -f $TMPDIR/dbtest.c $TMPDIR/dbtest
 429}
 430
 431check_strlcpy()
 432{
 433    cat >$TMPDIR/strtest.c <<EOF
 434#include <string.h>
 435int main(int argc, char **argv) {
 436        char dst[10];
 437        strlcpy(dst, "test", sizeof(dst));
 438        return 0;
 439}
 440EOF
 441    if $CC -I$INCLUDE -o $TMPDIR/strtest $TMPDIR/strtest.c >/dev/null 2>&1; then
 442        echo "no"
 443    else
 444        if ${PKG_CONFIG} libbsd --exists; then
 445                echo 'CFLAGS += -DHAVE_LIBBSD' `${PKG_CONFIG} libbsd --cflags` >>$CONFIG
 446                echo 'LDLIBS +=' `${PKG_CONFIG} libbsd --libs` >> $CONFIG
 447                echo "no"
 448        else
 449                echo 'CFLAGS += -DNEED_STRLCPY' >>$CONFIG
 450                echo "yes"
 451        fi
 452    fi
 453    rm -f $TMPDIR/strtest.c $TMPDIR/strtest
 454}
 455
 456check_cap()
 457{
 458        if ${PKG_CONFIG} libcap --exists; then
 459                echo "HAVE_CAP:=y" >>$CONFIG
 460                echo "yes"
 461
 462                echo 'CFLAGS += -DHAVE_LIBCAP' `${PKG_CONFIG} libcap --cflags` >>$CONFIG
 463                echo 'LDLIBS +=' `${PKG_CONFIG} libcap --libs` >> $CONFIG
 464        else
 465                echo "no"
 466        fi
 467}
 468
 469quiet_config()
 470{
 471        cat <<EOF
 472# user can control verbosity similar to kernel builds (e.g., V=1)
 473ifeq ("\$(origin V)", "command line")
 474  VERBOSE = \$(V)
 475endif
 476ifndef VERBOSE
 477  VERBOSE = 0
 478endif
 479ifeq (\$(VERBOSE),1)
 480  Q =
 481else
 482  Q = @
 483endif
 484
 485ifeq (\$(VERBOSE), 0)
 486    QUIET_CC       = @echo '    CC       '\$@;
 487    QUIET_AR       = @echo '    AR       '\$@;
 488    QUIET_LINK     = @echo '    LINK     '\$@;
 489    QUIET_YACC     = @echo '    YACC     '\$@;
 490    QUIET_LEX      = @echo '    LEX      '\$@;
 491endif
 492EOF
 493}
 494
 495usage()
 496{
 497        cat <<EOF
 498Usage: $0 [OPTIONS]
 499        --include_dir <dir>             Path to iproute2 include dir
 500        --libdir <dir>                  Path to iproute2 lib dir
 501        --libbpf_dir <dir>              Path to libbpf DESTDIR
 502        --libbpf_force <on|off>         Enable/disable libbpf by force. Available options:
 503                                          on: require link against libbpf, quit config if no libbpf support
 504                                          off: disable libbpf probing
 505        --prefix <dir>                  Path prefix of the lib files to install
 506        -h | --help                     Show this usage info
 507EOF
 508        exit $1
 509}
 510
 511# Compat with the old INCLUDE path setting method.
 512if [ $# -eq 1 ] && [ "$(echo $1 | cut -c 1)" != '-' ]; then
 513        INCLUDE="$1"
 514else
 515        while [ "$#" -gt 0 ]; do
 516                case "$1" in
 517                        --include_dir)
 518                                shift
 519                                INCLUDE="$1" ;;
 520                        --include_dir=*)
 521                                INCLUDE="${1#*=}" ;;
 522                        --libdir)
 523                                shift
 524                                LIBDIR="$1" ;;
 525                        --libdir=*)
 526                                LIBDIR="${1#*=}" ;;
 527                        --libbpf_dir)
 528                                shift
 529                                LIBBPF_DIR="$1" ;;
 530                        --libbpf_dir=*)
 531                                LIBBPF_DIR="${1#*=}" ;;
 532                        --libbpf_force)
 533                                shift
 534                                LIBBPF_FORCE="$1" ;;
 535                        --libbpf_force=*)
 536                                LIBBPF_FORCE="${1#*=}" ;;
 537                        --prefix)
 538                                shift
 539                                PREFIX="$1" ;;
 540                        --prefix=*)
 541                                PREFIX="${1#*=}" ;;
 542                        -h | --help)
 543                                usage 0 ;;
 544                        --*)
 545                                ;;
 546                        *)
 547                                usage 1 ;;
 548                esac
 549                [ "$#" -gt 0 ] && shift
 550        done
 551fi
 552
 553[ -d "$INCLUDE" ] || usage 1
 554if [ "${LIBBPF_DIR-unused}" != "unused" ]; then
 555        [ -d "$LIBBPF_DIR" ] || usage 1
 556fi
 557if [ "${LIBBPF_FORCE-unused}" != "unused" ]; then
 558        if [ "$LIBBPF_FORCE" != 'on' ] && [ "$LIBBPF_FORCE" != 'off' ]; then
 559                usage 1
 560        fi
 561fi
 562[ -z "$PREFIX" ] && usage 1
 563[ -z "$LIBDIR" ] && usage 1
 564
 565echo "# Generated config based on" $INCLUDE >$CONFIG
 566quiet_config >> $CONFIG
 567
 568check_toolchain
 569
 570echo "TC schedulers"
 571
 572echo -n " ATM   "
 573check_atm
 574
 575check_xtables
 576if ! grep -q TC_CONFIG_NO_XT $CONFIG; then
 577        echo -n " IPT   "
 578        check_xt
 579        check_xt_old
 580        check_xt_old_internal_h
 581        check_ipt
 582
 583        echo -n " IPSET  "
 584        check_ipset
 585fi
 586
 587echo
 588check_lib_dir
 589if ! grep -q TC_CONFIG_NO_XT $CONFIG; then
 590        echo -n "iptables modules directory: "
 591        check_ipt_lib_dir
 592fi
 593
 594echo -n "libc has setns: "
 595check_setns
 596
 597echo -n "libc has name_to_handle_at: "
 598check_name_to_handle_at
 599
 600echo -n "SELinux support: "
 601check_selinux
 602
 603echo -n "libbpf support: "
 604check_libbpf
 605
 606echo -n "ELF support: "
 607check_elf
 608
 609echo -n "libmnl support: "
 610check_mnl
 611
 612echo -n "Berkeley DB: "
 613check_berkeley_db
 614
 615echo -n "need for strlcpy: "
 616check_strlcpy
 617
 618echo -n "libcap support: "
 619check_cap
 620
 621echo >> $CONFIG
 622echo "%.o: %.c" >> $CONFIG
 623echo '  $(QUIET_CC)$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(CPPFLAGS) -c -o $@ $<' >> $CONFIG
 624
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