configure

   1 #! /bin/bash
   2 # This is not an autoconf generated configure
   3 #
   4 INCLUDE=${1:-"$PWD/include"}
   5
   6 # Make a temp directory in build tree.
   7 TMPDIR=$(mktemp -d config.XXXXXX)
   8 trap 'status=$?; rm -rf $TMPDIR; exit $status' EXIT HUP INT QUIT TERM
   9
  10 check_prog()
  11 {
  12     echo -n "$2"
  13     command -v $1 >/dev/null 2>&1 && (echo "$3:=y" >> Config; echo "yes") || (echo "no"; return 1)
  14 }
  15
  16 check_docs()
  17 {
  18     if check_prog latex " latex: " HAVE_LATEX; then
  19         check_prog pdflatex " pdflatex: " HAVE_PDFLATEX || echo " WARNING: no PDF docs can be built from LaTeX files"
  20         check_prog sgml2latex " sgml2latex: " HAVE_SGML2LATEX || echo " WARNING: no LaTeX files can be build from SGML files"
  21     else
  22         echo " WARNING: no docs can be built from LaTeX files"
  23     fi
  24
  25     check_prog sgml2html " sgml2html: " HAVE_SGML2HTML || echo " WARNING: no HTML docs can be built from SGML"
  26 }
  27
  28 check_toolchain()
  29 {
  30     : ${PKG_CONFIG:=pkg-config}
  31     : ${AR=ar}
  32     : ${CC=gcc}
  33     echo "PKG_CONFIG:=${PKG_CONFIG}" >>Config
  34     echo "AR:=${AR}" >>Config
  35     echo "CC:=${CC}" >>Config
  36 }
  37
  38 check_atm()
  39 {
  40     cat >$TMPDIR/atmtest.c <<EOF
  41 #include <atm.h>
  42 int main(int argc, char **argv) {
  43         struct atm_qos qos;
  44         (void) text2qos("aal5,ubr:sdu=9180,rx:none",&qos,0);
  45         return 0;
  46 }
  47 EOF
  48
  49     $CC -I$INCLUDE -o $TMPDIR/atmtest $TMPDIR/atmtest.c -latm >/dev/null 2>&1
  50     if [ $? -eq 0 ]
  51     then
  52         echo "TC_CONFIG_ATM:=y" >>Config
  53         echo yes
  54     else
  55         echo no
  56     fi
  57     rm -f $TMPDIR/atmtest.c $TMPDIR/atmtest
  58 }
  59
  60 check_xt()
  61 {
  62     #check if we have xtables from iptables >= 1.4.5.
  63     cat >$TMPDIR/ipttest.c <<EOF
  64 #include <xtables.h>
  65 #include <linux/netfilter.h>
  66 static struct xtables_globals test_globals = {
  67         .option_offset = 0,
  68         .program_name = "tc-ipt",
  69         .program_version = XTABLES_VERSION,
  70         .orig_opts = NULL,
  71         .opts = NULL,
  72         .exit_err = NULL,
  73 };
  74
  75 int main(int argc, char **argv)
  76 {
  77         xtables_init_all(&test_globals, NFPROTO_IPV4);
  78         return 0;
  79 }
  80 EOF
  81
  82     if $CC -I$INCLUDE $IPTC -o $TMPDIR/ipttest $TMPDIR/ipttest.c $IPTL \
  83         $(${PKG_CONFIG} xtables --cflags --libs) -ldl >/dev/null 2>&1
  84     then
  85         echo "TC_CONFIG_XT:=y" >>Config
  86         echo "using xtables"
  87     fi
  88     rm -f $TMPDIR/ipttest.c $TMPDIR/ipttest
  89 }
  90
  91 check_xt_old()
  92 {
  93     # bail if previous XT checks has already succeded.
  94     if grep -q TC_CONFIG_XT Config
  95     then
  96         return
  97     fi
  98
  99     #check if we dont need our internal header ..
 100     cat >$TMPDIR/ipttest.c <<EOF
 101 #include <xtables.h>
 102 char *lib_dir;
 103 unsigned int global_option_offset = 0;
 104 const char *program_version = XTABLES_VERSION;
 105 const char *program_name = "tc-ipt";
 106 struct afinfo afinfo = {
 107         .libprefix      = "libxt_",
 108 };
 109
 110 void exit_error(enum exittype status, const char *msg, ...)
 111 {
 112 }
 113
 114 int main(int argc, char **argv) {
 115
 116         return 0;
 117 }
 118
 119 EOF
 120
 121     $CC -I$INCLUDE $IPTC -o $TMPDIR/ipttest $TMPDIR/ipttest.c $IPTL -ldl >/dev/null 2>&1
 122     if [ $? -eq 0 ]
 123     then
 124         echo "TC_CONFIG_XT_OLD:=y" >>Config
 125         echo "using old xtables (no need for xt-internal.h)"
 126     fi
 127     rm -f $TMPDIR/ipttest.c $TMPDIR/ipttest
 128 }
 129
 130 check_xt_old_internal_h()
 131 {
 132     # bail if previous XT checks has already succeded.
 133     if grep -q TC_CONFIG_XT Config
 134     then
 135         return
 136     fi
 137
 138     #check if we need our own internal.h
 139     cat >$TMPDIR/ipttest.c <<EOF
 140 #include <xtables.h>
 141 #include "xt-internal.h"
 142 char *lib_dir;
 143 unsigned int global_option_offset = 0;
 144 const char *program_version = XTABLES_VERSION;
 145 const char *program_name = "tc-ipt";
 146 struct afinfo afinfo = {
 147         .libprefix      = "libxt_",
 148 };
 149
 150 void exit_error(enum exittype status, const char *msg, ...)
 151 {
 152 }
 153
 154 int main(int argc, char **argv) {
 155
 156         return 0;
 157 }
 158
 159 EOF
 160         $CC -I$INCLUDE $IPTC -o $TMPDIR/ipttest $TMPDIR/ipttest.c $IPTL -ldl >/dev/null 2>&1
 161
 162         if [ $? -eq 0 ]
 163         then
 164             echo "using old xtables with xt-internal.h"
 165             echo "TC_CONFIG_XT_OLD_H:=y" >>Config
 166         fi
 167         rm -f $TMPDIR/ipttest.c $TMPDIR/ipttest
 168 }
 169
 170 check_ipt()
 171 {
 172         if ! grep TC_CONFIG_XT Config > /dev/null
 173         then
 174                 echo "using iptables"
 175         fi
 176 }
 177
 178 check_ipt_lib_dir()
 179 {
 180         IPT_LIB_DIR=$(${PKG_CONFIG} --variable=xtlibdir xtables)
 181         if [ -n "$IPT_LIB_DIR" ]; then
 182                 echo $IPT_LIB_DIR
 183                 echo "IPT_LIB_DIR:=$IPT_LIB_DIR" >> Config
 184                 return
 185         fi
 186
 187         for dir in /lib /usr/lib /usr/local/lib
 188         do
 189                 for file in $dir/{xtables,iptables}/lib*t_*so ; do
 190                         if [ -f $file ]; then
 191                                 echo ${file%/*}
 192                                 echo "IPT_LIB_DIR:=${file%/*}" >> Config
 193                                 return
 194                         fi
 195                 done
 196         done
 197         echo "not found!"
 198 }
 199
 200 check_setns()
 201 {
 202     cat >$TMPDIR/setnstest.c <<EOF
 203 #include <sched.h>
 204 int main(int argc, char **argv)
 205 {
 206         (void)setns(0,0);
 207         return 0;
 208 }
 209 EOF
 210     $CC -I$INCLUDE -o $TMPDIR/setnstest $TMPDIR/setnstest.c >/dev/null 2>&1
 211     if [ $? -eq 0 ]
 212     then
 213         echo "IP_CONFIG_SETNS:=y" >>Config
 214         echo "yes"
 215     else
 216         echo "no"
 217     fi
 218     rm -f $TMPDIR/setnstest.c $TMPDIR/setnstest
 219 }
 220
 221 check_ipset()
 222 {
 223     cat >$TMPDIR/ipsettest.c <<EOF
 224 #include <linux/netfilter/ipset/ip_set.h>
 225 #ifndef IP_SET_INVALID
 226 #define IPSET_DIM_MAX 3
 227 typedef unsigned short ip_set_id_t;
 228 #endif
 229 #include <linux/netfilter/xt_set.h>
 230
 231 struct xt_set_info info;
 232 #if IPSET_PROTOCOL == 6
 233 int main(void)
 234 {
 235         return IPSET_MAXNAMELEN;
 236 }
 237 #else
 238 #error unknown ipset version
 239 #endif
 240 EOF
 241
 242     if $CC -I$INCLUDE -o $TMPDIR/ipsettest $TMPDIR/ipsettest.c >/dev/null 2>&1
 243     then
 244         echo "TC_CONFIG_IPSET:=y" >>Config
 245         echo "yes"
 246     else
 247         echo "no"
 248     fi
 249     rm -f $TMPDIR/ipsettest.c $TMPDIR/ipsettest
 250 }
 251
 252 check_elf()
 253 {
 254     cat >$TMPDIR/elftest.c <<EOF
 255 #include <libelf.h>
 256 #include <gelf.h>
 257 int main(void)
 258 {
 259         Elf_Scn *scn;
 260         GElf_Shdr shdr;
 261         return elf_version(EV_CURRENT);
 262 }
 263 EOF
 264
 265     if $CC -I$INCLUDE -o $TMPDIR/elftest $TMPDIR/elftest.c -lelf >/dev/null 2>&1
 266     then
 267         echo "TC_CONFIG_ELF:=y" >>Config
 268         echo "yes"
 269     else
 270         echo "no"
 271     fi
 272     rm -f $TMPDIR/elftest.c $TMPDIR/elftest
 273 }
 274
 275 check_selinux()
 276 # SELinux is a compile time option in the ss utility
 277 {
 278         if ${PKG_CONFIG} libselinux --exists
 279         then
 280                 echo "HAVE_SELINUX:=y" >>Config
 281                 echo "yes"
 282         else
 283                 echo "no"
 284         fi
 285 }
 286
 287 check_mnl()
 288 {
 289         if ${PKG_CONFIG} libmnl --exists
 290         then
 291                 echo "HAVE_MNL:=y" >>Config
 292                 echo "yes"
 293         else
 294                 echo "no"
 295         fi
 296 }
 297
 298 check_berkeley_db()
 299 {
 300     cat >$TMPDIR/dbtest.c <<EOF
 301 #include <fcntl.h>
 302 #include <stdlib.h>
 303 #include <db_185.h>
 304 int main(int argc, char **argv) {
 305         dbopen("/tmp/xxx_test_db.db", O_CREAT|O_RDWR, 0644, DB_HASH, NULL);
 306         return 0;
 307 }
 308 EOF
 309     $CC -I$INCLUDE -o $TMPDIR/dbtest $TMPDIR/dbtest.c -ldb >/dev/null 2>&1
 310     if [ $? -eq 0 ]
 311     then
 312         echo "HAVE_BERKELEY_DB:=y" >>Config
 313         echo "yes"
 314     else
 315         echo "no"
 316     fi
 317     rm -f $TMPDIR/dbtest.c $TMPDIR/dbtest
 318 }
 319
 320 quiet_config()
 321 {
 322         cat <<EOF
 323 # user can control verbosity similar to kernel builds (e.g., V=1)
 324 ifeq ("\$(origin V)", "command line")
 325   VERBOSE = \$(V)
 326 endif
 327 ifndef VERBOSE
 328   VERBOSE = 0
 329 endif
 330 ifeq (\$(VERBOSE),1)
 331   Q =
 332 else
 333   Q = @
 334 endif
 335
 336 ifeq (\$(VERBOSE), 0)
 337     QUIET_CC       = @echo '    CC       '\$@;
 338     QUIET_AR       = @echo '    AR       '\$@;
 339     QUIET_LINK     = @echo '    LINK     '\$@;
 340     QUIET_YACC     = @echo '    YACC     '\$@;
 341     QUIET_LEX      = @echo '    LEX      '\$@;
 342 endif
 343 EOF
 344 }
 345
 346 echo "# Generated config based on" $INCLUDE >Config
 347 quiet_config >> Config
 348
 349 check_toolchain
 350
 351 echo "TC schedulers"
 352
 353 echo -n " ATM   "
 354 check_atm
 355
 356 echo -n " IPT   "
 357 check_xt
 358 check_xt_old
 359 check_xt_old_internal_h
 360 check_ipt
 361
 362 echo -n " IPSET  "
 363 check_ipset
 364
 365 echo
 366 echo -n "iptables modules directory: "
 367 check_ipt_lib_dir
 368
 369 echo -n "libc has setns: "
 370 check_setns
 371
 372 echo -n "SELinux support: "
 373 check_selinux
 374
 375 echo -n "ELF support: "
 376 check_elf
 377
 378 echo -n "libmnl support: "
 379 check_mnl
 380
 381 echo -n "Berkeley DB: "
 382 check_berkeley_db
 383
 384 echo
 385 echo -n "docs:"
 386 check_docs
 387 echo
 388
 389 echo >> Config
 390 echo "%.o: %.c" >> Config
 391 echo '  $(QUIET_CC)$(CC) $(CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<' >> Config