configure

   1 #!/bin/sh
   2 # SPDX-License-Identifier: GPL-2.0
   3 # This is not an autoconf generated configure
   4 #
   5 INCLUDE=${1:-"$PWD/include"}
   6
   7 # Output file which is input to Makefile
   8 CONFIG=config.mk
   9
  10 # Make a temp directory in build tree.
  11 TMPDIR=$(mktemp -d config.XXXXXX)
  12 trap 'status=$?; rm -rf $TMPDIR; exit $status' EXIT HUP INT QUIT TERM
  13
  14 check_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}" >>$CONFIG
  24 }
  25
  26 check_atm()
  27 {
  28     cat >$TMPDIR/atmtest.c <<EOF
  29 #include <atm.h>
  30 int 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 }
  35 EOF
  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
  46 check_xtables()
  47 {
  48         if ! ${PKG_CONFIG} xtables --exists; then
  49                 echo "TC_CONFIG_NO_XT:=y" >>$CONFIG
  50         fi
  51 }
  52
  53 check_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>
  59 static 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
  68 int main(int argc, char **argv)
  69 {
  70         xtables_init_all(&test_globals, NFPROTO_IPV4);
  71         return 0;
  72 }
  73 EOF
  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
  83 check_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>
  91 char *lib_dir;
  92 unsigned int global_option_offset = 0;
  93 const char *program_version = XTABLES_VERSION;
  94 const char *program_name = "tc-ipt";
  95 struct afinfo afinfo = {
  96         .libprefix      = "libxt_",
  97 };
  98
  99 void exit_error(enum exittype status, const char *msg, ...)
 100 {
 101 }
 102
 103 int main(int argc, char **argv) {
 104
 105         return 0;
 106 }
 107
 108 EOF
 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
 117 check_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"
 126 char *lib_dir;
 127 unsigned int global_option_offset = 0;
 128 const char *program_version = XTABLES_VERSION;
 129 const char *program_name = "tc-ipt";
 130 struct afinfo afinfo = {
 131         .libprefix      = "libxt_",
 132 };
 133
 134 void exit_error(enum exittype status, const char *msg, ...)
 135 {
 136 }
 137
 138 int main(int argc, char **argv) {
 139
 140         return 0;
 141 }
 142
 143 EOF
 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
 151 check_ipt()
 152 {
 153         if ! grep TC_CONFIG_XT $CONFIG > /dev/null; then
 154                 echo "using iptables"
 155         fi
 156 }
 157
 158 check_ipt_lib_dir()
 159 {
 160         IPT_LIB_DIR=$(${PKG_CONFIG} --variable=xtlibdir xtables)
 161         if [ -n "$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%/*}" >> $CONFIG
 173                                 return
 174                         fi
 175                 done
 176         done
 177         echo "not found!"
 178 }
 179
 180 check_setns()
 181 {
 182     cat >$TMPDIR/setnstest.c <<EOF
 183 #include <sched.h>
 184 int main(int argc, char **argv)
 185 {
 186         (void)setns(0,0);
 187         return 0;
 188 }
 189 EOF
 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 $TMPDIR/setnstest
 198 }
 199
 200 check_ipset()
 201 {
 202     cat >$TMPDIR/ipsettest.c <<EOF
 203 #include <linux/netfilter/ipset/ip_set.h>
 204 #ifndef IP_SET_INVALID
 205 #define IPSET_DIM_MAX 3
 206 typedef unsigned short ip_set_id_t;
 207 #endif
 208 #include <linux/netfilter/xt_set.h>
 209
 210 struct xt_set_info info;
 211 #if IPSET_PROTOCOL == 6
 212 int main(void)
 213 {
 214         return IPSET_MAXNAMELEN;
 215 }
 216 #else
 217 #error unknown ipset version
 218 #endif
 219 EOF
 220
 221     if $CC -I$INCLUDE -o $TMPDIR/ipsettest $TMPDIR/ipsettest.c >/dev/null 2>&1; then
 222         echo "TC_CONFIG_IPSET:=y" >>$CONFIG
 223         echo "yes"
 224     else
 225         echo "no"
 226     fi
 227     rm -f $TMPDIR/ipsettest.c $TMPDIR/ipsettest
 228 }
 229
 230 check_elf()
 231 {
 232     if ${PKG_CONFIG} libelf --exists; then
 233         echo "HAVE_ELF:=y" >>$CONFIG
 234         echo "yes"
 235
 236         echo 'CFLAGS += -DHAVE_ELF' `${PKG_CONFIG} libelf --cflags` >> $CONFIG
 237         echo 'LDLIBS += ' `${PKG_CONFIG} libelf --libs` >>$CONFIG
 238     else
 239         echo "no"
 240     fi
 241 }
 242
 243 check_selinux()
 244 # SELinux is a compile time option in the ss utility
 245 {
 246         if ${PKG_CONFIG} libselinux --exists; then
 247                 echo "HAVE_SELINUX:=y" >>$CONFIG
 248                 echo "yes"
 249
 250                 echo 'LDLIBS +=' `${PKG_CONFIG} --libs libselinux` >>$CONFIG
 251                 echo 'CFLAGS += -DHAVE_SELINUX' `${PKG_CONFIG} --cflags libselinux` >>$CONFIG
 252         else
 253                 echo "no"
 254         fi
 255 }
 256
 257 check_mnl()
 258 {
 259         if ${PKG_CONFIG} libmnl --exists; then
 260                 echo "HAVE_MNL:=y" >>$CONFIG
 261                 echo "yes"
 262
 263                 echo 'CFLAGS += -DHAVE_LIBMNL' `${PKG_CONFIG} libmnl --cflags` >>$CONFIG
 264                 echo 'LDLIBS +=' `${PKG_CONFIG} libmnl --libs` >> $CONFIG
 265         else
 266                 echo "no"
 267         fi
 268 }
 269
 270 check_berkeley_db()
 271 {
 272     cat >$TMPDIR/dbtest.c <<EOF
 273 #include <fcntl.h>
 274 #include <stdlib.h>
 275 #include <db_185.h>
 276 int main(int argc, char **argv) {
 277         dbopen("/tmp/xxx_test_db.db", O_CREAT|O_RDWR, 0644, DB_HASH, NULL);
 278         return 0;
 279 }
 280 EOF
 281     if $CC -I$INCLUDE -o $TMPDIR/dbtest $TMPDIR/dbtest.c -ldb >/dev/null 2>&1; then
 282         echo "HAVE_BERKELEY_DB:=y" >>$CONFIG
 283         echo "yes"
 284     else
 285         echo "no"
 286     fi
 287     rm -f $TMPDIR/dbtest.c $TMPDIR/dbtest
 288 }
 289
 290 check_strlcpy()
 291 {
 292     cat >$TMPDIR/strtest.c <<EOF
 293 #include <string.h>
 294 int main(int argc, char **argv) {
 295         char dst[10];
 296         strlcpy(dst, "test", sizeof(dst));
 297         return 0;
 298 }
 299 EOF
 300     if $CC -I$INCLUDE -o $TMPDIR/strtest $TMPDIR/strtest.c >/dev/null 2>&1; then
 301         echo "no"
 302     else
 303         if ${PKG_CONFIG} libbsd --exists; then
 304                 echo 'CFLAGS += -DHAVE_LIBBSD' `${PKG_CONFIG} libbsd --cflags` >>$CONFIG
 305                 echo 'LDLIBS +=' `${PKG_CONFIG} libbsd --libs` >> $CONFIG
 306                 echo "no"
 307         else
 308                 echo 'CFLAGS += -DNEED_STRLCPY' >>$CONFIG
 309                 echo "yes"
 310         fi
 311     fi
 312     rm -f $TMPDIR/strtest.c $TMPDIR/strtest
 313 }
 314
 315 check_cap()
 316 {
 317         if ${PKG_CONFIG} libcap --exists; then
 318                 echo "HAVE_CAP:=y" >>$CONFIG
 319                 echo "yes"
 320
 321                 echo 'CFLAGS += -DHAVE_LIBCAP' `${PKG_CONFIG} libcap --cflags` >>$CONFIG
 322                 echo 'LDLIBS +=' `${PKG_CONFIG} libcap --libs` >> $CONFIG
 323         else
 324                 echo "no"
 325         fi
 326 }
 327
 328 quiet_config()
 329 {
 330         cat <<EOF
 331 # user can control verbosity similar to kernel builds (e.g., V=1)
 332 ifeq ("\$(origin V)", "command line")
 333   VERBOSE = \$(V)
 334 endif
 335 ifndef VERBOSE
 336   VERBOSE = 0
 337 endif
 338 ifeq (\$(VERBOSE),1)
 339   Q =
 340 else
 341   Q = @
 342 endif
 343
 344 ifeq (\$(VERBOSE), 0)
 345     QUIET_CC       = @echo '    CC       '\$@;
 346     QUIET_AR       = @echo '    AR       '\$@;
 347     QUIET_LINK     = @echo '    LINK     '\$@;
 348     QUIET_YACC     = @echo '    YACC     '\$@;
 349     QUIET_LEX      = @echo '    LEX      '\$@;
 350 endif
 351 EOF
 352 }
 353
 354 echo "# Generated config based on" $INCLUDE >$CONFIG
 355 quiet_config >> $CONFIG
 356
 357 check_toolchain
 358
 359 echo "TC schedulers"
 360
 361 echo -n " ATM   "
 362 check_atm
 363
 364 check_xtables
 365 if ! grep -q TC_CONFIG_NO_XT $CONFIG; then
 366         echo -n " IPT   "
 367         check_xt
 368         check_xt_old
 369         check_xt_old_internal_h
 370         check_ipt
 371
 372         echo -n " IPSET  "
 373         check_ipset
 374 fi
 375
 376 echo
 377 if ! grep -q TC_CONFIG_NO_XT $CONFIG; then
 378         echo -n "iptables modules directory: "
 379         check_ipt_lib_dir
 380 fi
 381
 382 echo -n "libc has setns: "
 383 check_setns
 384
 385 echo -n "SELinux support: "
 386 check_selinux
 387
 388 echo -n "ELF support: "
 389 check_elf
 390
 391 echo -n "libmnl support: "
 392 check_mnl
 393
 394 echo -n "Berkeley DB: "
 395 check_berkeley_db
 396
 397 echo -n "need for strlcpy: "
 398 check_strlcpy
 399
 400 echo -n "libcap support: "
 401 check_cap
 402
 403 echo >> $CONFIG
 404 echo "%.o: %.c" >> $CONFIG
 405 echo '  $(QUIET_CC)$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(CPPFLAGS) -c -o $@ $<' >> $CONFIG