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