sysdeps/unix/sysv/linux/configure

   1
   2 # ac_fn_c_check_header_compile LINENO HEADER VAR INCLUDES
   3 # -------------------------------------------------------
   4 # Tests whether HEADER exists and can be compiled using the include files in
   5 # INCLUDES, setting the cache variable VAR accordingly.
   6 ac_fn_c_check_header_compile ()
   7 {
   8   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   9   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
  10 $as_echo_n "checking for $2... " >&6; }
  11 if eval \${$3+:} false; then :
  12   $as_echo_n "(cached) " >&6
  13 else
  14   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
  15 /* end confdefs.h.  */
  16 $4
  17 #include <$2>
  18 _ACEOF
  19 if ac_fn_c_try_compile "$LINENO"; then :
  20   eval "$3=yes"
  21 else
  22   eval "$3=no"
  23 fi
  24 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
  25 fi
  26 eval ac_res=\$$3
  27                { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
  28 $as_echo "$ac_res" >&6; }
  29   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
  30
  31 } # ac_fn_c_check_header_compile
  32 # This file is generated from configure.ac by Autoconf.  DO NOT EDIT!
  33  # Local configure fragment for sysdeps/unix/sysv/linux.
  34
  35 # Don't bother trying to generate any glue code to be compatible with the
  36 # existing system library, because we are the only system library.
  37 inhibit_glue=yes
  38
  39 if test -n "$sysheaders"; then
  40   OLD_CPPFLAGS=$CPPFLAGS
  41   CPPFLAGS="$CPPFLAGS $SYSINCLUDES"
  42 fi
  43
  44
  45 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
  46 $as_echo_n "checking for grep that handles long lines and -e... " >&6; }
  47 if ${ac_cv_path_GREP+:} false; then :
  48   $as_echo_n "(cached) " >&6
  49 else
  50   if test -z "$GREP"; then
  51   ac_path_GREP_found=false
  52   # Loop through the user's path and test for each of PROGNAME-LIST
  53   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
  54 for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
  55 do
  56   IFS=$as_save_IFS
  57   test -z "$as_dir" && as_dir=.
  58     for ac_prog in grep ggrep; do
  59     for ac_exec_ext in '' $ac_executable_extensions; do
  60       ac_path_GREP="$as_dir/$ac_prog$ac_exec_ext"
  61       { test -f "$ac_path_GREP" && $as_test_x "$ac_path_GREP"; } || continue
  62 # Check for GNU ac_path_GREP and select it if it is found.
  63   # Check for GNU $ac_path_GREP
  64 case `"$ac_path_GREP" --version 2>&1` in
  65 *GNU*)
  66   ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
  67 *)
  68   ac_count=0
  69   $as_echo_n 0123456789 >"conftest.in"
  70   while :
  71   do
  72     cat "conftest.in" "conftest.in" >"conftest.tmp"
  73     mv "conftest.tmp" "conftest.in"
  74     cp "conftest.in" "conftest.nl"
  75     $as_echo 'GREP' >> "conftest.nl"
  76     "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
  77     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
  78     as_fn_arith $ac_count + 1 && ac_count=$as_val
  79     if test $ac_count -gt ${ac_path_GREP_max-0}; then
  80       # Best one so far, save it but keep looking for a better one
  81       ac_cv_path_GREP="$ac_path_GREP"
  82       ac_path_GREP_max=$ac_count
  83     fi
  84     # 10*(2^10) chars as input seems more than enough
  85     test $ac_count -gt 10 && break
  86   done
  87   rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
  88 esac
  89
  90       $ac_path_GREP_found && break 3
  91     done
  92   done
  93   done
  94 IFS=$as_save_IFS
  95   if test -z "$ac_cv_path_GREP"; then
  96     as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
  97   fi
  98 else
  99   ac_cv_path_GREP=$GREP
 100 fi
 101
 102 fi
 103 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
 104 $as_echo "$ac_cv_path_GREP" >&6; }
 105  GREP="$ac_cv_path_GREP"
 106
 107
 108 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
 109 $as_echo_n "checking for egrep... " >&6; }
 110 if ${ac_cv_path_EGREP+:} false; then :
 111   $as_echo_n "(cached) " >&6
 112 else
 113   if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
 114    then ac_cv_path_EGREP="$GREP -E"
 115    else
 116      if test -z "$EGREP"; then
 117   ac_path_EGREP_found=false
 118   # Loop through the user's path and test for each of PROGNAME-LIST
 119   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 120 for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
 121 do
 122   IFS=$as_save_IFS
 123   test -z "$as_dir" && as_dir=.
 124     for ac_prog in egrep; do
 125     for ac_exec_ext in '' $ac_executable_extensions; do
 126       ac_path_EGREP="$as_dir/$ac_prog$ac_exec_ext"
 127       { test -f "$ac_path_EGREP" && $as_test_x "$ac_path_EGREP"; } || continue
 128 # Check for GNU ac_path_EGREP and select it if it is found.
 129   # Check for GNU $ac_path_EGREP
 130 case `"$ac_path_EGREP" --version 2>&1` in
 131 *GNU*)
 132   ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
 133 *)
 134   ac_count=0
 135   $as_echo_n 0123456789 >"conftest.in"
 136   while :
 137   do
 138     cat "conftest.in" "conftest.in" >"conftest.tmp"
 139     mv "conftest.tmp" "conftest.in"
 140     cp "conftest.in" "conftest.nl"
 141     $as_echo 'EGREP' >> "conftest.nl"
 142     "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
 143     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
 144     as_fn_arith $ac_count + 1 && ac_count=$as_val
 145     if test $ac_count -gt ${ac_path_EGREP_max-0}; then
 146       # Best one so far, save it but keep looking for a better one
 147       ac_cv_path_EGREP="$ac_path_EGREP"
 148       ac_path_EGREP_max=$ac_count
 149     fi
 150     # 10*(2^10) chars as input seems more than enough
 151     test $ac_count -gt 10 && break
 152   done
 153   rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
 154 esac
 155
 156       $ac_path_EGREP_found && break 3
 157     done
 158   done
 159   done
 160 IFS=$as_save_IFS
 161   if test -z "$ac_cv_path_EGREP"; then
 162     as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
 163   fi
 164 else
 165   ac_cv_path_EGREP=$EGREP
 166 fi
 167
 168    fi
 169 fi
 170 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
 171 $as_echo "$ac_cv_path_EGREP" >&6; }
 172  EGREP="$ac_cv_path_EGREP"
 173
 174
 175 { $as_echo "$as_me:${as_lineno-$LINENO}: checking installed Linux kernel header files" >&5
 176 $as_echo_n "checking installed Linux kernel header files... " >&6; }
 177 if ${libc_cv_linux2619+:} false; then :
 178   $as_echo_n "(cached) " >&6
 179 else
 180   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 181 /* end confdefs.h.  */
 182 #include <linux/version.h>
 183 #if !defined LINUX_VERSION_CODE || LINUX_VERSION_CODE <  (2 *65536+ 6 *256+ 19) /* 2.6.19 */
 184 eat flaming death
 185 #endif
 186 _ACEOF
 187 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
 188   $EGREP "eat flaming death" >/dev/null 2>&1; then :
 189   libc_cv_linux2619='TOO OLD!'
 190 else
 191   libc_cv_linux2619='2.6.19 or later'
 192 fi
 193 rm -f conftest*
 194
 195 fi
 196 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_linux2619" >&5
 197 $as_echo "$libc_cv_linux2619" >&6; }
 198 if test "$libc_cv_linux2619" != '2.6.19 or later'; then
 199   as_fn_error $? "GNU libc requires kernel header files from
 200 Linux 2.6.19 or later to be installed before configuring.
 201 The kernel header files are found usually in /usr/include/asm and
 202 /usr/include/linux; make sure these directories use files from
 203 Linux 2.6.19 or later.  This check uses <linux/version.h>, so
 204 make sure that file was built correctly when installing the kernel header
 205 files.  To use kernel headers not from /usr/include/linux, use the
 206 configure option --with-headers." "$LINENO" 5
 207 fi
 208
 209 # If the user gave a minimal version number test whether the available
 210 # kernel headers are young enough.  Additionally we have minimal
 211 # kernel versions for some architectures.  If a previous configure fragment
 212 # set arch_minimum_kernel already, let that override our defaults here.
 213 # Note that we presume such a fragment has set libc_cv_gcc_unwind_find_fde
 214 # if appropriate too.
 215 test -n "$arch_minimum_kernel" ||
 216 case "$machine" in
 217   i386*)
 218     libc_cv_gcc_unwind_find_fde=yes
 219     arch_minimum_kernel=2.6.16
 220     ;;
 221   x86_64/x32)
 222     arch_minimum_kernel=3.4.0
 223     ;;
 224   powerpc/powerpc32*)
 225     libc_cv_gcc_unwind_find_fde=yes
 226     arch_minimum_kernel=2.6.16
 227     ;;
 228   s390/s390-32)
 229     libc_cv_gcc_unwind_find_fde=yes
 230     arch_minimum_kernel=2.6.16
 231     ;;
 232   s390/s390-64)
 233     libc_cv_gcc_unwind_find_fde=yes
 234     arch_minimum_kernel=2.6.16
 235     ;;
 236   sh*)
 237     arch_minimum_kernel=2.6.16
 238     libc_cv_gcc_unwind_find_fde=yes
 239     ;;
 240   sparc/sparc64*)
 241     libc_cv_gcc_unwind_find_fde=yes
 242     arch_minimum_kernel=2.6.16
 243     ;;
 244   sparc*)
 245     libc_cv_gcc_unwind_find_fde=yes
 246     arch_minimum_kernel=2.6.16
 247     ;;
 248   *)
 249     arch_minimum_kernel=2.6.16
 250     ;;
 251 esac
 252 if test -n "$minimum_kernel"; then
 253
 254   user_version=$((`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
 255   arch_version=$((`echo "$arch_minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
 256
 257   if test $user_version -lt $arch_version; then
 258     { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: minimum kernel version reset to $arch_minimum_kernel" >&5
 259 $as_echo "$as_me: WARNING: minimum kernel version reset to $arch_minimum_kernel" >&2;}
 260     minimum_kernel=$arch_minimum_kernel
 261   fi
 262 else
 263   minimum_kernel=$arch_minimum_kernel
 264 fi
 265
 266 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for kernel header at least $minimum_kernel" >&5
 267 $as_echo_n "checking for kernel header at least $minimum_kernel... " >&6; }
 268 decnum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/(\1 * 65536 + \2 * 256 + \3)/'`;
 269 abinum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1,\2,\3/'`;
 270 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 271 /* end confdefs.h.  */
 272 #include <linux/version.h>
 273 #if LINUX_VERSION_CODE < $decnum
 274 eat flaming death
 275 #endif
 276 _ACEOF
 277 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
 278   $EGREP "eat flaming death" >/dev/null 2>&1; then :
 279   libc_minimum_kernel='too old!'
 280 else
 281   libc_minimum_kernel=ok
 282 fi
 283 rm -f conftest*
 284
 285 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_minimum_kernel" >&5
 286 $as_echo "$libc_minimum_kernel" >&6; }
 287 if test "$libc_minimum_kernel" = ok; then
 288   cat >>confdefs.h <<_ACEOF
 289 #define __LINUX_KERNEL_VERSION $decnum
 290 _ACEOF
 291
 292   cat >>confdefs.h <<_ACEOF
 293 #define __ABI_TAG_VERSION $abinum
 294 _ACEOF
 295
 296 else
 297   as_fn_error $? "*** The available kernel headers are older than the requested
 298 *** compatible kernel version" "$LINENO" 5
 299 fi
 300
 301 # Until we start requiring 2.6.37+ headers, we need to check for the
 302 # availability of linux/fanotify.h for testing purposes.
 303 ac_fn_c_check_header_compile "$LINENO" "linux/fanotify.h" "ac_cv_header_linux_fanotify_h" "/* No default includes.  */
 304 "
 305 if test "x$ac_cv_header_linux_fanotify_h" = xyes; then :
 306   DEFINES="$DEFINES -DHAVE_LINUX_FANOTIFY_H=1"
 307 fi
 308
 309
 310
 311 # The result of the above test for the use of the FDE code is invalid if
 312 # the user overrides the decision about the minimum ABI.
 313 if test "$oldest_abi" != default && test "2.2.4" \< "$oldest_abi"; then
 314   libc_cv_gcc_unwind_find_fde=no
 315 fi
 316
 317 if test -n "$sysheaders"; then
 318   CPPFLAGS=$OLD_CPPFLAGS
 319 fi
 320
 321 # Under Linux the NPTL add-on should be available.
 322 case $add_ons in
 323   # It is available.  Good.
 324   *nptl*)
 325     nptl_missing=
 326     ;;
 327   *)
 328     nptl_missing=yes
 329     ;;
 330 esac
 331
 332 if test "$nptl_missing"; then
 333   if test $enable_sanity = yes; then
 334     echo "\
 335 *** On GNU/Linux systems it is normal to compile GNU libc with the
 336 *** \`nptl' add-on.  Without that, the library will be
 337 *** incompatible with normal GNU/Linux systems.
 338 *** If you really mean to not use this add-on, run configure again
 339 *** using the extra parameter \`--disable-sanity-checks'."
 340     exit 1
 341   else
 342     echo "\
 343 *** WARNING: Are you sure you do not want to use the \`nptl'
 344 *** add-on?"
 345   fi
 346 fi
 347
 348 if test "$prefix" = "/usr/local" -o "$prefix" = "/usr/local/" -o "$prefix" = "NONE"; then
 349   if test $enable_sanity = yes; then
 350     echo "\
 351 *** On GNU/Linux systems the GNU C Library should not be installed into
 352 *** /usr/local since this might make your system totally unusable.
 353 *** We strongly advise to use a different prefix.  For details read the FAQ.
 354 *** If you really mean to do this, run configure again using the extra
 355 *** parameter \`--disable-sanity-checks'."
 356     exit 1
 357   else
 358     echo "\
 359 *** WARNING: Do you really want to install the GNU C Library into /usr/local?
 360 *** This might make your system totally unusable, for details read the FAQ."
 361   fi
 362 fi
 363
 364
 365 # One Linux we use ldconfig.
 366 use_ldconfig=yes
 367
 368 # We need some extensions to the `ldd' script.
 369
 370 case "$machine" in
 371   i[3456]86*)
 372     ldd_rewrite_script=sysdeps/unix/sysv/linux/ldd-rewrite.sed
 373     ;;
 374   s390*)
 375     ldd_rewrite_script=sysdeps/unix/sysv/linux/s390/ldd-rewrite.sed
 376     ;;
 377   sparc*)
 378     ldd_rewrite_script=sysdeps/unix/sysv/linux/sparc/ldd-rewrite.sed
 379     ;;
 380   x86_64*)
 381     ldd_rewrite_script=sysdeps/unix/sysv/linux/x86_64/ldd-rewrite.sed
 382     ;;
 383   powerpc*)
 384     ldd_rewrite_script=sysdeps/unix/sysv/linux/powerpc/ldd-rewrite.sed
 385     ;;
 386   *)
 387     ;;
 388 esac
 389
 390
 391 if test $host = $build; then
 392   # If $prefix/include/{net,scsi} are symlinks, make install will
 393   # clobber what they're linked to (probably a kernel tree).
 394   # test -L ought to work on all Linux boxes.
 395   if test "x$prefix" != xNONE; then
 396     ac_prefix=$prefix
 397   else
 398     ac_prefix=$ac_default_prefix
 399   fi
 400   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for symlinks in ${ac_prefix}/include" >&5
 401 $as_echo_n "checking for symlinks in ${ac_prefix}/include... " >&6; }
 402   ac_message=
 403   if test -L ${ac_prefix}/include/net; then
 404     ac_message="$ac_message
 405    ${ac_prefix}/include/net is a symlink"
 406   fi
 407   if test -L ${ac_prefix}/include/scsi; then
 408     ac_message="$ac_message
 409    ${ac_prefix}/include/scsi is a symlink"
 410   fi
 411   if test -n "$ac_message"; then
 412     as_fn_error $? "$ac_message
 413 \`make install' will destroy the target of the link(s).
 414 Delete the links and re-run configure, or better still, move the entire
 415 ${ac_prefix}/include directory out of the way." "$LINENO" 5
 416   else
 417     { $as_echo "$as_me:${as_lineno-$LINENO}: result: ok" >&5
 418 $as_echo "ok" >&6; }
 419   fi
 420 fi
 421
 422 # We have inlined syscalls.
 423 $as_echo "#define HAVE_INLINED_SYSCALLS 1" >>confdefs.h
 424