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 egrep" >&5
  26 echo $ECHO_N "checking for egrep... $ECHO_C" >&6
  27 if test "${ac_cv_prog_egrep+set}" = set; then
  28   echo $ECHO_N "(cached) $ECHO_C" >&6
  29 else
  30   if echo a | (grep -E '(a|b)') >/dev/null 2>&1
  31     then ac_cv_prog_egrep='grep -E'
  32     else ac_cv_prog_egrep='egrep'
  33     fi
  34 fi
  35 echo "$as_me:$LINENO: result: $ac_cv_prog_egrep" >&5
  36 echo "${ECHO_T}$ac_cv_prog_egrep" >&6
  37  EGREP=$ac_cv_prog_egrep
  38
  39
  40 echo "$as_me:$LINENO: checking installed Linux kernel header files" >&5
  41 echo $ECHO_N "checking installed Linux kernel header files... $ECHO_C" >&6
  42 if test "${libc_cv_linux2010+set}" = set; then
  43   echo $ECHO_N "(cached) $ECHO_C" >&6
  44 else
  45   cat >conftest.$ac_ext <<_ACEOF
  46 /* confdefs.h.  */
  47 _ACEOF
  48 cat confdefs.h >>conftest.$ac_ext
  49 cat >>conftest.$ac_ext <<_ACEOF
  50 /* end confdefs.h.  */
  51 #include <linux/version.h>
  52 #if !defined LINUX_VERSION_CODE || LINUX_VERSION_CODE <  (2 *65536+ 0 *256+ 10) /* 2.0.10 */
  53 eat flaming death
  54 #endif
  55 _ACEOF
  56 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  57   $EGREP "eat flaming death" >/dev/null 2>&1; then
  58   libc_cv_linux2010='TOO OLD!'
  59 else
  60   libc_cv_linux2010='2.0.10 or later'
  61 fi
  62 rm -f conftest*
  63
  64 fi
  65 echo "$as_me:$LINENO: result: $libc_cv_linux2010" >&5
  66 echo "${ECHO_T}$libc_cv_linux2010" >&6
  67 if test "$libc_cv_linux2010" != '2.0.10 or later'; then
  68   { { echo "$as_me:$LINENO: error: GNU libc requires kernel header files from
  69 Linux 2.0.10 or later to be installed before configuring.
  70 The kernel header files are found usually in /usr/include/asm and
  71 /usr/include/linux; make sure these directories use files from
  72 Linux 2.0.10 or later.  This check uses <linux/version.h>, so
  73 make sure that file was built correctly when installing the kernel header
  74 files.  To use kernel headers not from /usr/include/linux, use the
  75 configure option --with-headers." >&5
  76 echo "$as_me: error: GNU libc requires kernel header files from
  77 Linux 2.0.10 or later to be installed before configuring.
  78 The kernel header files are found usually in /usr/include/asm and
  79 /usr/include/linux; make sure these directories use files from
  80 Linux 2.0.10 or later.  This check uses <linux/version.h>, so
  81 make sure that file was built correctly when installing the kernel header
  82 files.  To use kernel headers not from /usr/include/linux, use the
  83 configure option --with-headers." >&2;}
  84    { (exit 1); exit 1; }; }
  85 fi
  86
  87 # If the user gave a minimal version number test whether the available
  88 # kernel headers are young enough.  Additionally we have minimal
  89 # kernel versions for some architectures.  If a previous configure fragment
  90 # set arch_minimum_kernel already, let that override our defaults here.
  91 # Note that we presume such a fragment has set libc_cv_gcc_unwind_find_fde
  92 # if appropriate too.
  93 test -n "$arch_minimum_kernel" ||
  94 case "$machine" in
  95   alpha*)
  96     arch_minimum_kernel=2.1.100
  97     libc_cv_gcc_unwind_find_fde=yes
  98     ;;
  99   arm*)
 100     arch_minimum_kernel=2.0.10
 101     libc_cv_gcc_unwind_find_fde=yes
 102     ;;
 103   i386*)
 104     libc_cv_gcc_unwind_find_fde=yes
 105     arch_minimum_kernel=2.0.10
 106     ;;
 107   ia64*)
 108     arch_minimum_kernel=2.4.0
 109     ;;
 110   hppa*)
 111     libc_cv_gcc_unwind_find_fde=yes
 112     arch_minimum_kernel=2.4.19
 113     ;;
 114   m68k*)
 115     arch_minimum_kernel=2.0.10
 116     libc_cv_gcc_unwind_find_fde=yes
 117     ;;
 118   powerpc/powerpc32)
 119     libc_cv_gcc_unwind_find_fde=yes
 120     arch_minimum_kernel=2.0.10
 121     ;;
 122   powerpc/powerpc64)
 123     arch_minimum_kernel=2.4.19
 124     ;;
 125   s390/s390-32)
 126     libc_cv_gcc_unwind_find_fde=yes
 127     arch_minimum_kernel=2.2.10
 128     ;;
 129   s390/s390-64)
 130     libc_cv_gcc_unwind_find_fde=yes
 131     arch_minimum_kernel=2.4.0
 132     ;;
 133   sh*)
 134     arch_minimum_kernel=2.3.99
 135     libc_cv_gcc_unwind_find_fde=yes
 136     ;;
 137   sparc/sparc64*)
 138     libc_cv_gcc_unwind_find_fde=yes
 139     arch_minimum_kernel=2.4.21
 140     ;;
 141   sparc*)
 142     libc_cv_gcc_unwind_find_fde=yes
 143     arch_minimum_kernel=2.0.10
 144     ;;
 145   x86_64*)
 146     arch_minimum_kernel=2.4.0
 147     ;;
 148   *)
 149     arch_minimum_kernel=2.0.10
 150     ;;
 151 esac
 152 if test -n "$minimum_kernel"; then
 153
 154   user_version=$((`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
 155   arch_version=$((`echo "$arch_minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
 156
 157   if test $user_version -lt $arch_version; then
 158     { echo "$as_me:$LINENO: WARNING: minimum kernel version reset to $arch_minimum_kernel" >&5
 159 echo "$as_me: WARNING: minimum kernel version reset to $arch_minimum_kernel" >&2;}
 160     minimum_kernel=$arch_minimum_kernel
 161   fi
 162 else
 163   if test $arch_minimum_kernel != '2.0.10'; then
 164     minimum_kernel=$arch_minimum_kernel
 165   fi
 166 fi
 167
 168 if test -n "$minimum_kernel"; then
 169   echo "$as_me:$LINENO: checking for kernel header at least $minimum_kernel" >&5
 170 echo $ECHO_N "checking for kernel header at least $minimum_kernel... $ECHO_C" >&6
 171   decnum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/(\1 * 65536 + \2 * 256 + \3)/'`;
 172   abinum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1,\2,\3/'`;
 173   cat >conftest.$ac_ext <<_ACEOF
 174 /* confdefs.h.  */
 175 _ACEOF
 176 cat confdefs.h >>conftest.$ac_ext
 177 cat >>conftest.$ac_ext <<_ACEOF
 178 /* end confdefs.h.  */
 179 #include <linux/version.h>
 180 #if LINUX_VERSION_CODE < $decnum
 181 eat flaming death
 182 #endif
 183 _ACEOF
 184 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
 185   $EGREP "eat flaming death" >/dev/null 2>&1; then
 186   libc_minimum_kernel='too old!'
 187 else
 188   libc_minimum_kernel=ok
 189 fi
 190 rm -f conftest*
 191
 192   echo "$as_me:$LINENO: result: $libc_minimum_kernel" >&5
 193 echo "${ECHO_T}$libc_minimum_kernel" >&6
 194   if test "$libc_minimum_kernel" = ok; then
 195     cat >>confdefs.h <<_ACEOF
 196 #define __LINUX_KERNEL_VERSION $decnum
 197 _ACEOF
 198
 199     cat >>confdefs.h <<_ACEOF
 200 #define __ABI_TAG_VERSION $abinum
 201 _ACEOF
 202
 203   else
 204     { { echo "$as_me:$LINENO: error: *** The available kernel headers are older than the requested
 205 *** compatible kernel version" >&5
 206 echo "$as_me: error: *** The available kernel headers are older than the requested
 207 *** compatible kernel version" >&2;}
 208    { (exit 1); exit 1; }; }
 209   fi
 210 fi
 211
 212 # The result of the above test for the use of the FDE code is invalid if
 213 # the user overrides the decision about the minimum ABI.
 214 if test "$oldest_abi" != default && test "2.2.4" \< "$oldest_abi"; then
 215   libc_cv_gcc_unwind_find_fde=no
 216 fi
 217
 218 if test -n "$sysheaders"; then
 219   CPPFLAGS=$OLD_CPPFLAGS
 220 fi
 221 # The Linux filesystem standard prescribes where to place "essential"
 222 # files.  I.e., when the installation prefix is "/usr" we have to place
 223 # shared library objects and the configuration files on the root partition
 224 # in /lib and /etc.
 225 case "$prefix" in
 226 /usr | /usr/)
 227   # 64-bit libraries on bi-arch platforms go in /lib64 instead of /lib.
 228   # Allow earlier configure scripts to handle libc_cv_slibdir, libdir,
 229   # and libc_cv_localedir.
 230   test -n "$libc_cv_slibdir" || \
 231   case $machine in
 232   sparc/sparc64 | x86_64 | powerpc/powerpc64 | s390/s390-64)
 233     libc_cv_slibdir="/lib64"
 234     if test "$libdir" = '${exec_prefix}/lib'; then
 235       libdir='${exec_prefix}/lib64';
 236       # Locale data can be shared between 32bit and 64bit libraries
 237       libc_cv_localedir='${exec_prefix}/lib/locale'
 238     fi
 239     ;;
 240   *)
 241     libc_cv_slibdir="/lib"
 242     ;;
 243   esac
 244   # Allow the user to override the path with --sysconfdir
 245   if test $sysconfdir = '${prefix}/etc'; then
 246     libc_cv_sysconfdir=/etc
 247   else
 248     libc_cv_sysconfdir=$sysconfdir
 249    fi
 250   libc_cv_rootsbindir="/sbin"
 251   ;;
 252 esac
 253
 254 if test "$prefix" = "/usr/local" -o "$prefix" = "/usr/local/" -o "$prefix" = "NONE"; then
 255   if test $enable_sanity = yes; then
 256     echo "\
 257 *** On GNU/Linux systems the GNU C Library should not be installed into
 258 *** /usr/local since this might make your system totally unusable.
 259 *** We strongly advise to use a different prefix.  For details read the FAQ.
 260 *** If you really mean to do this, run configure again using the extra
 261 *** parameter \`--disable-sanity-checks'."
 262     exit 1
 263   else
 264     echo "\
 265 *** WARNING: Do you really want to install the GNU C Library into /usr/local?
 266 *** This might make your system totally unusable, for details read the FAQ."
 267   fi
 268 fi
 269
 270
 271 # One Linux we use ldconfig.
 272 use_ldconfig=yes
 273
 274 # We need some extensions to the `ldd' script.
 275
 276 case "$machine" in
 277   i[3456]86* | m68*)
 278     ldd_rewrite_script=../sysdeps/unix/sysv/linux/ldd-rewrite.sed
 279     ;;
 280   ia64*)
 281     ldd_rewrite_script=../sysdeps/unix/sysv/linux/ia64/ldd-rewrite.sed
 282     ;;
 283   s390*)
 284     ldd_rewrite_script=../sysdeps/unix/sysv/linux/s390/ldd-rewrite.sed
 285     ;;
 286   sparc*)
 287     ldd_rewrite_script=../sysdeps/unix/sysv/linux/sparc/ldd-rewrite.sed
 288     ;;
 289   x86_64*)
 290     ldd_rewrite_script=../sysdeps/unix/sysv/linux/x86_64/ldd-rewrite.sed
 291     ;;
 292   powerpc*)
 293     ldd_rewrite_script=../sysdeps/unix/sysv/linux/powerpc/ldd-rewrite.sed
 294     ;;
 295   *)
 296     ;;
 297 esac
 298
 299
 300 if test $host = $build; then
 301   # If $prefix/include/{net,scsi} are symlinks, make install will
 302   # clobber what they're linked to (probably a kernel tree).
 303   # test -L ought to work on all Linux boxes.
 304   if test "x$prefix" != xNONE; then
 305     ac_prefix=$prefix
 306   else
 307     ac_prefix=$ac_default_prefix
 308   fi
 309   echo "$as_me:$LINENO: checking for symlinks in ${ac_prefix}/include" >&5
 310 echo $ECHO_N "checking for symlinks in ${ac_prefix}/include... $ECHO_C" >&6
 311   ac_message=
 312   if test -L ${ac_prefix}/include/net; then
 313     ac_message="$ac_message
 314    ${ac_prefix}/include/net is a symlink"
 315   fi
 316   if test -L ${ac_prefix}/include/scsi; then
 317     ac_message="$ac_message
 318    ${ac_prefix}/include/scsi is a symlink"
 319   fi
 320   if test -n "$ac_message"; then
 321     { { echo "$as_me:$LINENO: error: $ac_message
 322 \`make install' will destroy the target of the link(s).
 323 Delete the links and re-run configure, or better still, move the entire
 324 ${ac_prefix}/include directory out of the way." >&5
 325 echo "$as_me: error: $ac_message
 326 \`make install' will destroy the target of the link(s).
 327 Delete the links and re-run configure, or better still, move the entire
 328 ${ac_prefix}/include directory out of the way." >&2;}
 329    { (exit 1); exit 1; }; }
 330   else
 331     echo "$as_me:$LINENO: result: ok" >&5
 332 echo "${ECHO_T}ok" >&6
 333   fi
 334 fi
 335
 336 # We have inlined syscalls.
 337 cat >>confdefs.h <<\_ACEOF
 338 #define HAVE_INLINED_SYSCALLS 1
 339 _ACEOF
 340