sysdeps/unix/sysv/linux/configure

   1 # This file is generated from configure.in by Autoconf.  DO NOT EDIT!
   2  # Local configure fragment for sysdeps/unix/sysv/linux.
   3
   4 # The Linux kernel headers can be found in
   5 #   /lib/modules/$(uname -r)/build/include
   6 # Check whether this directory is available.
   7 if test -z "$sysheaders" &&
   8    test "x$cross_compiling" = xno &&
   9    test -d /lib/modules/`uname -r`/build/include; then
  10   sysheaders="/lib/modules/`uname -r`/build/include"
  11   ccheaders=`$CC -print-file-name=include`
  12       SYSINCLUDES="-I $sysheaders"
  13 fi
  14
  15 # Don't bother trying to generate any glue code to be compatible with the
  16 # existing system library, because we are the only system library.
  17 inhibit_glue=yes
  18
  19 if test -n "$sysheaders"; then
  20   OLD_CPPFLAGS=$CPPFLAGS
  21   CPPFLAGS="$CPPFLAGS $SYSINCLUDES"
  22 fi
  23
  24
  25 { echo "$as_me:$LINENO: checking for grep that handles long lines and -e" >&5
  26 echo $ECHO_N "checking for grep that handles long lines and -e... $ECHO_C" >&6; }
  27 if test "${ac_cv_path_GREP+set}" = set; then
  28   echo $ECHO_N "(cached) $ECHO_C" >&6
  29 else
  30   # Extract the first word of "grep ggrep" to use in msg output
  31 if test -z "$GREP"; then
  32 set dummy grep ggrep; ac_prog_name=$2
  33 if test "${ac_cv_path_GREP+set}" = set; then
  34   echo $ECHO_N "(cached) $ECHO_C" >&6
  35 else
  36   ac_path_GREP_found=false
  37 # Loop through the user's path and test for each of PROGNAME-LIST
  38 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
  39 for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
  40 do
  41   IFS=$as_save_IFS
  42   test -z "$as_dir" && as_dir=.
  43   for ac_prog in grep ggrep; do
  44   for ac_exec_ext in '' $ac_executable_extensions; do
  45     ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
  46     { test -f "$ac_path_GREP" && $as_test_x "$ac_path_GREP"; } || continue
  47     # Check for GNU ac_path_GREP and select it if it is found.
  48   # Check for GNU $ac_path_GREP
  49 case `"$ac_path_GREP" --version 2>&1` in
  50 *GNU*)
  51   ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
  52 *)
  53   ac_count=0
  54   echo $ECHO_N "0123456789$ECHO_C" >"conftest.in"
  55   while :
  56   do
  57     cat "conftest.in" "conftest.in" >"conftest.tmp"
  58     mv "conftest.tmp" "conftest.in"
  59     cp "conftest.in" "conftest.nl"
  60     echo 'GREP' >> "conftest.nl"
  61     "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
  62     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
  63     ac_count=`expr $ac_count + 1`
  64     if test $ac_count -gt ${ac_path_GREP_max-0}; then
  65       # Best one so far, save it but keep looking for a better one
  66       ac_cv_path_GREP="$ac_path_GREP"
  67       ac_path_GREP_max=$ac_count
  68     fi
  69     # 10*(2^10) chars as input seems more than enough
  70     test $ac_count -gt 10 && break
  71   done
  72   rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
  73 esac
  74
  75
  76     $ac_path_GREP_found && break 3
  77   done
  78 done
  79
  80 done
  81 IFS=$as_save_IFS
  82
  83
  84 fi
  85
  86 GREP="$ac_cv_path_GREP"
  87 if test -z "$GREP"; then
  88   { { echo "$as_me:$LINENO: error: no acceptable $ac_prog_name could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&5
  89 echo "$as_me: error: no acceptable $ac_prog_name could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&2;}
  90    { (exit 1); exit 1; }; }
  91 fi
  92
  93 else
  94   ac_cv_path_GREP=$GREP
  95 fi
  96
  97
  98 fi
  99 { echo "$as_me:$LINENO: result: $ac_cv_path_GREP" >&5
 100 echo "${ECHO_T}$ac_cv_path_GREP" >&6; }
 101  GREP="$ac_cv_path_GREP"
 102
 103
 104 { echo "$as_me:$LINENO: checking for egrep" >&5
 105 echo $ECHO_N "checking for egrep... $ECHO_C" >&6; }
 106 if test "${ac_cv_path_EGREP+set}" = set; then
 107   echo $ECHO_N "(cached) $ECHO_C" >&6
 108 else
 109   if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
 110    then ac_cv_path_EGREP="$GREP -E"
 111    else
 112      # Extract the first word of "egrep" to use in msg output
 113 if test -z "$EGREP"; then
 114 set dummy egrep; ac_prog_name=$2
 115 if test "${ac_cv_path_EGREP+set}" = set; then
 116   echo $ECHO_N "(cached) $ECHO_C" >&6
 117 else
 118   ac_path_EGREP_found=false
 119 # Loop through the user's path and test for each of PROGNAME-LIST
 120 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 121 for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
 122 do
 123   IFS=$as_save_IFS
 124   test -z "$as_dir" && as_dir=.
 125   for ac_prog in egrep; do
 126   for ac_exec_ext in '' $ac_executable_extensions; do
 127     ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
 128     { test -f "$ac_path_EGREP" && $as_test_x "$ac_path_EGREP"; } || continue
 129     # Check for GNU ac_path_EGREP and select it if it is found.
 130   # Check for GNU $ac_path_EGREP
 131 case `"$ac_path_EGREP" --version 2>&1` in
 132 *GNU*)
 133   ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
 134 *)
 135   ac_count=0
 136   echo $ECHO_N "0123456789$ECHO_C" >"conftest.in"
 137   while :
 138   do
 139     cat "conftest.in" "conftest.in" >"conftest.tmp"
 140     mv "conftest.tmp" "conftest.in"
 141     cp "conftest.in" "conftest.nl"
 142     echo 'EGREP' >> "conftest.nl"
 143     "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
 144     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
 145     ac_count=`expr $ac_count + 1`
 146     if test $ac_count -gt ${ac_path_EGREP_max-0}; then
 147       # Best one so far, save it but keep looking for a better one
 148       ac_cv_path_EGREP="$ac_path_EGREP"
 149       ac_path_EGREP_max=$ac_count
 150     fi
 151     # 10*(2^10) chars as input seems more than enough
 152     test $ac_count -gt 10 && break
 153   done
 154   rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
 155 esac
 156
 157
 158     $ac_path_EGREP_found && break 3
 159   done
 160 done
 161
 162 done
 163 IFS=$as_save_IFS
 164
 165
 166 fi
 167
 168 EGREP="$ac_cv_path_EGREP"
 169 if test -z "$EGREP"; then
 170   { { echo "$as_me:$LINENO: error: no acceptable $ac_prog_name could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&5
 171 echo "$as_me: error: no acceptable $ac_prog_name could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" >&2;}
 172    { (exit 1); exit 1; }; }
 173 fi
 174
 175 else
 176   ac_cv_path_EGREP=$EGREP
 177 fi
 178
 179
 180    fi
 181 fi
 182 { echo "$as_me:$LINENO: result: $ac_cv_path_EGREP" >&5
 183 echo "${ECHO_T}$ac_cv_path_EGREP" >&6; }
 184  EGREP="$ac_cv_path_EGREP"
 185
 186
 187 { echo "$as_me:$LINENO: checking installed Linux kernel header files" >&5
 188 echo $ECHO_N "checking installed Linux kernel header files... $ECHO_C" >&6; }
 189 if test "${libc_cv_linux2010+set}" = set; then
 190   echo $ECHO_N "(cached) $ECHO_C" >&6
 191 else
 192   cat >conftest.$ac_ext <<_ACEOF
 193 /* confdefs.h.  */
 194 _ACEOF
 195 cat confdefs.h >>conftest.$ac_ext
 196 cat >>conftest.$ac_ext <<_ACEOF
 197 /* end confdefs.h.  */
 198 #include <linux/version.h>
 199 #if !defined LINUX_VERSION_CODE || LINUX_VERSION_CODE <  (2 *65536+ 0 *256+ 10) /* 2.0.10 */
 200 eat flaming death
 201 #endif
 202 _ACEOF
 203 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
 204   $EGREP "eat flaming death" >/dev/null 2>&1; then
 205   libc_cv_linux2010='TOO OLD!'
 206 else
 207   libc_cv_linux2010='2.0.10 or later'
 208 fi
 209 rm -f conftest*
 210
 211 fi
 212 { echo "$as_me:$LINENO: result: $libc_cv_linux2010" >&5
 213 echo "${ECHO_T}$libc_cv_linux2010" >&6; }
 214 if test "$libc_cv_linux2010" != '2.0.10 or later'; then
 215   { { echo "$as_me:$LINENO: error: GNU libc requires kernel header files from
 216 Linux 2.0.10 or later to be installed before configuring.
 217 The kernel header files are found usually in /usr/include/asm and
 218 /usr/include/linux; make sure these directories use files from
 219 Linux 2.0.10 or later.  This check uses <linux/version.h>, so
 220 make sure that file was built correctly when installing the kernel header
 221 files.  To use kernel headers not from /usr/include/linux, use the
 222 configure option --with-headers." >&5
 223 echo "$as_me: error: GNU libc requires kernel header files from
 224 Linux 2.0.10 or later to be installed before configuring.
 225 The kernel header files are found usually in /usr/include/asm and
 226 /usr/include/linux; make sure these directories use files from
 227 Linux 2.0.10 or later.  This check uses <linux/version.h>, so
 228 make sure that file was built correctly when installing the kernel header
 229 files.  To use kernel headers not from /usr/include/linux, use the
 230 configure option --with-headers." >&2;}
 231    { (exit 1); exit 1; }; }
 232 fi
 233
 234 # If the user gave a minimal version number test whether the available
 235 # kernel headers are young enough.  Additionally we have minimal
 236 # kernel versions for some architectures.  If a previous configure fragment
 237 # set arch_minimum_kernel already, let that override our defaults here.
 238 # Note that we presume such a fragment has set libc_cv_gcc_unwind_find_fde
 239 # if appropriate too.
 240 test -n "$arch_minimum_kernel" ||
 241 case "$machine" in
 242   alpha*)
 243     arch_minimum_kernel=2.1.100
 244     libc_cv_gcc_unwind_find_fde=yes
 245     ;;
 246   arm*)
 247     arch_minimum_kernel=2.0.10
 248     libc_cv_gcc_unwind_find_fde=yes
 249     ;;
 250   i386*)
 251     libc_cv_gcc_unwind_find_fde=yes
 252     arch_minimum_kernel=2.0.10
 253     ;;
 254   ia64*)
 255     arch_minimum_kernel=2.4.0
 256     ;;
 257   hppa*)
 258     libc_cv_gcc_unwind_find_fde=yes
 259     arch_minimum_kernel=2.4.19
 260     ;;
 261   m68k*)
 262     arch_minimum_kernel=2.0.10
 263     libc_cv_gcc_unwind_find_fde=yes
 264     ;;
 265   powerpc/powerpc32)
 266     libc_cv_gcc_unwind_find_fde=yes
 267     arch_minimum_kernel=2.0.10
 268     ;;
 269   powerpc/powerpc64)
 270     arch_minimum_kernel=2.4.21
 271     ;;
 272   s390/s390-32)
 273     libc_cv_gcc_unwind_find_fde=yes
 274     arch_minimum_kernel=2.2.10
 275     ;;
 276   s390/s390-64)
 277     libc_cv_gcc_unwind_find_fde=yes
 278     arch_minimum_kernel=2.4.0
 279     ;;
 280   sh*)
 281     arch_minimum_kernel=2.3.99
 282     libc_cv_gcc_unwind_find_fde=yes
 283     ;;
 284   sparc/sparc64*)
 285     libc_cv_gcc_unwind_find_fde=yes
 286     arch_minimum_kernel=2.4.21
 287     ;;
 288   sparc*)
 289     libc_cv_gcc_unwind_find_fde=yes
 290     arch_minimum_kernel=2.0.10
 291     ;;
 292   x86_64*)
 293     arch_minimum_kernel=2.4.0
 294     ;;
 295   *)
 296     arch_minimum_kernel=2.0.10
 297     ;;
 298 esac
 299 if test -n "$minimum_kernel"; then
 300
 301   user_version=$((`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
 302   arch_version=$((`echo "$arch_minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
 303
 304   if test $user_version -lt $arch_version; then
 305     { echo "$as_me:$LINENO: WARNING: minimum kernel version reset to $arch_minimum_kernel" >&5
 306 echo "$as_me: WARNING: minimum kernel version reset to $arch_minimum_kernel" >&2;}
 307     minimum_kernel=$arch_minimum_kernel
 308   fi
 309 else
 310   if test $arch_minimum_kernel != '2.0.10'; then
 311     minimum_kernel=$arch_minimum_kernel
 312   fi
 313 fi
 314
 315 if test -n "$minimum_kernel"; then
 316   { echo "$as_me:$LINENO: checking for kernel header at least $minimum_kernel" >&5
 317 echo $ECHO_N "checking for kernel header at least $minimum_kernel... $ECHO_C" >&6; }
 318   decnum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/(\1 * 65536 + \2 * 256 + \3)/'`;
 319   abinum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1,\2,\3/'`;
 320   cat >conftest.$ac_ext <<_ACEOF
 321 /* confdefs.h.  */
 322 _ACEOF
 323 cat confdefs.h >>conftest.$ac_ext
 324 cat >>conftest.$ac_ext <<_ACEOF
 325 /* end confdefs.h.  */
 326 #include <linux/version.h>
 327 #if LINUX_VERSION_CODE < $decnum
 328 eat flaming death
 329 #endif
 330 _ACEOF
 331 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
 332   $EGREP "eat flaming death" >/dev/null 2>&1; then
 333   libc_minimum_kernel='too old!'
 334 else
 335   libc_minimum_kernel=ok
 336 fi
 337 rm -f conftest*
 338
 339   { echo "$as_me:$LINENO: result: $libc_minimum_kernel" >&5
 340 echo "${ECHO_T}$libc_minimum_kernel" >&6; }
 341   if test "$libc_minimum_kernel" = ok; then
 342     cat >>confdefs.h <<_ACEOF
 343 #define __LINUX_KERNEL_VERSION $decnum
 344 _ACEOF
 345
 346     cat >>confdefs.h <<_ACEOF
 347 #define __ABI_TAG_VERSION $abinum
 348 _ACEOF
 349
 350   else
 351     { { echo "$as_me:$LINENO: error: *** The available kernel headers are older than the requested
 352 *** compatible kernel version" >&5
 353 echo "$as_me: error: *** The available kernel headers are older than the requested
 354 *** compatible kernel version" >&2;}
 355    { (exit 1); exit 1; }; }
 356   fi
 357 fi
 358
 359 # The result of the above test for the use of the FDE code is invalid if
 360 # the user overrides the decision about the minimum ABI.
 361 if test "$oldest_abi" != default && test "2.2.4" \< "$oldest_abi"; then
 362   libc_cv_gcc_unwind_find_fde=no
 363 fi
 364
 365 if test -n "$sysheaders"; then
 366   CPPFLAGS=$OLD_CPPFLAGS
 367 fi
 368 # The Linux filesystem standard prescribes where to place "essential"
 369 # files.  I.e., when the installation prefix is "/usr" we have to place
 370 # shared library objects and the configuration files on the root partition
 371 # in /lib and /etc.
 372 case "$prefix" in
 373 /usr | /usr/)
 374   # 64-bit libraries on bi-arch platforms go in /lib64 instead of /lib.
 375   # Allow earlier configure scripts to handle libc_cv_slibdir, libdir,
 376   # and libc_cv_localedir.
 377   test -n "$libc_cv_slibdir" || \
 378   case $machine in
 379   sparc/sparc64 | x86_64 | powerpc/powerpc64 | s390/s390-64)
 380     libc_cv_slibdir="/lib64"
 381     if test "$libdir" = '${exec_prefix}/lib'; then
 382       libdir='${exec_prefix}/lib64';
 383       # Locale data can be shared between 32bit and 64bit libraries
 384       libc_cv_localedir='${exec_prefix}/lib/locale'
 385     fi
 386     ;;
 387   *)
 388     libc_cv_slibdir="/lib"
 389     ;;
 390   esac
 391   # Allow the user to override the path with --sysconfdir
 392   if test $sysconfdir = '${prefix}/etc'; then
 393     libc_cv_sysconfdir=/etc
 394   else
 395     libc_cv_sysconfdir=$sysconfdir
 396    fi
 397   libc_cv_rootsbindir="/sbin"
 398   ;;
 399 esac
 400
 401 # Under Linux the NPTL add-on should be available.
 402 case $add_ons in
 403   # It is available.  Good.
 404   *nptl*)
 405     nptl_missing=
 406     ;;
 407   *)
 408     nptl_missing=yes
 409     ;;
 410 esac
 411
 412 if test "$nptl_missing"; then
 413   if test $enable_sanity = yes; then
 414     echo "\
 415 *** On GNU/Linux systems it is normal to compile GNU libc with the
 416 *** \`nptl' add-on.  Without that, the library will be
 417 *** incompatible with normal GNU/Linux systems.
 418 *** If you really mean to not use this add-on, run configure again
 419 *** using the extra parameter \`--disable-sanity-checks'."
 420     exit 1
 421   else
 422     echo "\
 423 *** WARNING: Are you sure you do not want to use the \`nptl'
 424 *** add-on?"
 425   fi
 426 fi
 427
 428 if test "$prefix" = "/usr/local" -o "$prefix" = "/usr/local/" -o "$prefix" = "NONE"; then
 429   if test $enable_sanity = yes; then
 430     echo "\
 431 *** On GNU/Linux systems the GNU C Library should not be installed into
 432 *** /usr/local since this might make your system totally unusable.
 433 *** We strongly advise to use a different prefix.  For details read the FAQ.
 434 *** If you really mean to do this, run configure again using the extra
 435 *** parameter \`--disable-sanity-checks'."
 436     exit 1
 437   else
 438     echo "\
 439 *** WARNING: Do you really want to install the GNU C Library into /usr/local?
 440 *** This might make your system totally unusable, for details read the FAQ."
 441   fi
 442 fi
 443
 444
 445 # One Linux we use ldconfig.
 446 use_ldconfig=yes
 447
 448 # We need some extensions to the `ldd' script.
 449
 450 case "$machine" in
 451   i[3456]86* | m68*)
 452     ldd_rewrite_script=../sysdeps/unix/sysv/linux/ldd-rewrite.sed
 453     ;;
 454   ia64*)
 455     ldd_rewrite_script=../sysdeps/unix/sysv/linux/ia64/ldd-rewrite.sed
 456     ;;
 457   s390*)
 458     ldd_rewrite_script=../sysdeps/unix/sysv/linux/s390/ldd-rewrite.sed
 459     ;;
 460   sparc*)
 461     ldd_rewrite_script=../sysdeps/unix/sysv/linux/sparc/ldd-rewrite.sed
 462     ;;
 463   x86_64*)
 464     ldd_rewrite_script=../sysdeps/unix/sysv/linux/x86_64/ldd-rewrite.sed
 465     ;;
 466   powerpc*)
 467     ldd_rewrite_script=../sysdeps/unix/sysv/linux/powerpc/ldd-rewrite.sed
 468     ;;
 469   *)
 470     ;;
 471 esac
 472
 473
 474 if test $host = $build; then
 475   # If $prefix/include/{net,scsi} are symlinks, make install will
 476   # clobber what they're linked to (probably a kernel tree).
 477   # test -L ought to work on all Linux boxes.
 478   if test "x$prefix" != xNONE; then
 479     ac_prefix=$prefix
 480   else
 481     ac_prefix=$ac_default_prefix
 482   fi
 483   { echo "$as_me:$LINENO: checking for symlinks in ${ac_prefix}/include" >&5
 484 echo $ECHO_N "checking for symlinks in ${ac_prefix}/include... $ECHO_C" >&6; }
 485   ac_message=
 486   if test -L ${ac_prefix}/include/net; then
 487     ac_message="$ac_message
 488    ${ac_prefix}/include/net is a symlink"
 489   fi
 490   if test -L ${ac_prefix}/include/scsi; then
 491     ac_message="$ac_message
 492    ${ac_prefix}/include/scsi is a symlink"
 493   fi
 494   if test -n "$ac_message"; then
 495     { { echo "$as_me:$LINENO: error: $ac_message
 496 \`make install' will destroy the target of the link(s).
 497 Delete the links and re-run configure, or better still, move the entire
 498 ${ac_prefix}/include directory out of the way." >&5
 499 echo "$as_me: error: $ac_message
 500 \`make install' will destroy the target of the link(s).
 501 Delete the links and re-run configure, or better still, move the entire
 502 ${ac_prefix}/include directory out of the way." >&2;}
 503    { (exit 1); exit 1; }; }
 504   else
 505     { echo "$as_me:$LINENO: result: ok" >&5
 506 echo "${ECHO_T}ok" >&6; }
 507   fi
 508 fi
 509
 510 # We have inlined syscalls.
 511 cat >>confdefs.h <<\_ACEOF
 512 #define HAVE_INLINED_SYSCALLS 1
 513 _ACEOF
 514