about summary refs log tree commit diff
path: root/sysdeps/unix/sysv/linux/configure
blob: b08bbb297320c3706f035998f2b6d7cdeebba071 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
 # Local configure fragment for sysdeps/unix/sysv/linux.

# Don't bother trying to generate any glue code to be compatible with the
# existing system library, because we are the only system library.
inhibit_glue=yes

if test -n "$sysheaders"; then
  OLD_CPPFLAGS=$CPPFLAGS
  CPPFLAGS="$CPPFLAGS $SYSINCLUDES"
fi
echo $ac_n "checking installed Linux kernel header files""... $ac_c" 1>&6
echo "configure:13: checking installed Linux kernel header files" >&5
if eval "test \"`echo '$''{'libc_cv_linux2010'+set}'`\" = set"; then
  echo $ac_n "(cached) $ac_c" 1>&6
else
  cat > conftest.$ac_ext <<EOF
#line 18 "configure"
#include "confdefs.h"
#include <linux/version.h>
#if !defined LINUX_VERSION_CODE || LINUX_VERSION_CODE <  (2 *65536+ 0 *256+ 10) /* 2.0.10 */
eat flaming death
#endif
EOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  egrep "eat flaming death" >/dev/null 2>&1; then
  rm -rf conftest*
  libc_cv_linux2010='TOO OLD!'
else
  rm -rf conftest*
  libc_cv_linux2010='2.0.10 or later'
fi
rm -f conftest*

fi

echo "$ac_t""$libc_cv_linux2010" 1>&6
if test "$libc_cv_linux2010" != '2.0.10 or later'; then
  { echo "configure: error: GNU libc requires kernel header files from
Linux 2.0.10 or later to be installed before configuring.
The kernel header files are found usually in /usr/include/asm and
/usr/include/linux; make sure these directories use files from
Linux 2.0.10 or later.  This check uses <linux/version.h>, so
make sure that file was built correctly when installing the kernel header
files.  To use kernel headers not from /usr/include/linux, use the
configure option --with-headers." 1>&2; exit 1; }
fi

# If the user gave a minimal version number test whether the available
# kernel headers are young enough.  Additionally we have minimal
# kernel versions for some architectures.
case "$machine" in
  alpha*)
    arch_minimum_kernel=2.1.100
    libc_cv_gcc_unwind_find_fde=yes
    ;;
  arm*)
    arch_minimum_kernel=2.0.10
    libc_cv_gcc_unwind_find_fde=yes
    ;;
  i386*)
    libc_cv_gcc_unwind_find_fde=yes
    arch_minimum_kernel=2.0.10
    ;;
  ia64*)
    arch_minimum_kernel=2.4.0
    ;;
  hppa*)
    arch_minimum_kernel=2.3.99
    ;;
  m68k*)
    arch_minimum_kernel=2.0.10
    libc_cv_gcc_unwind_find_fde=yes
    ;;
  mips*)
    arch_minimum_kernel=2.2.15
    libc_cv_gcc_unwind_find_fde=yes
    ;;
  powerpc*)
    libc_cv_gcc_unwind_find_fde=yes
    arch_minimum_kernel=2.0.10
    ;;
  s390/s390-32)
    libc_cv_gcc_unwind_find_fde=yes
    arch_minimum_kernel=2.2.10
    ;;
  s390/s390-64)
    libc_cv_gcc_unwind_find_fde=yes
    arch_minimum_kernel=2.4.0
    ;;
  sh*)
    arch_minimum_kernel=2.3.99
    libc_cv_gcc_unwind_find_fde=yes
    ;;
  sparc*)
    libc_cv_gcc_unwind_find_fde=yes
    arch_minimum_kernel=2.0.10
    ;;
  x86_64*)
    arch_minimum_kernel=2.4.0
    ;;
  *)
    arch_minimum_kernel=2.0.10
    ;;
esac
if test -n "$minimum_kernel"; then
  
  user_version=$((`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
  arch_version=$((`echo "$arch_minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1 \* 65536 + \2 \* 256 + \3/'`))
  
  if test $user_version -lt $arch_version; then
    echo "configure: warning: minimum kernel version reset to $arch_minimum_kernel" 1>&2
    minimum_kernel=$arch_minimum_kernel
  fi
else
  if test $arch_minimum_kernel != '2.0.10'; then
    minimum_kernel=$arch_minimum_kernel
  fi
fi

if test -n "$minimum_kernel"; then
  echo $ac_n "checking for kernel header at least $minimum_kernel""... $ac_c" 1>&6
echo "configure:123: checking for kernel header at least $minimum_kernel" >&5
  decnum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/(\1 * 65536 + \2 * 256 + \3)/'`;
  abinum=`echo "$minimum_kernel.0.0.0" | sed 's/\([0-9]*\)\.\([0-9]*\)\.\([0-9]*\).*/\1,\2,\3/'`;
  cat > conftest.$ac_ext <<EOF
#line 127 "configure"
#include "confdefs.h"
#include <linux/version.h>
#if LINUX_VERSION_CODE < $decnum
eat flaming death
#endif
EOF
if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
  egrep "eat flaming death" >/dev/null 2>&1; then
  rm -rf conftest*
  libc_minimum_kernel='too old!'
else
  rm -rf conftest*
  libc_minimum_kernel=ok
fi
rm -f conftest*

  echo "$ac_t""$libc_minimum_kernel" 1>&6
  if test "$libc_minimum_kernel" = ok; then
    cat >> confdefs.h <<EOF
#define __LINUX_KERNEL_VERSION $decnum
EOF

    cat >> confdefs.h <<EOF
#define __ABI_TAG_VERSION $abinum
EOF

  else
    { echo "configure: error: *** The available kernel headers are older than the requested
*** compatible kernel version" 1>&2; exit 1; }
  fi
fi

# The result of the above test for the use of the FDE code is invalid if
# the user overrides the decision about the minimum ABI.
if test "$oldest_abi" != default && test "2.2.4" \< "$oldest_abi"; then
  libc_cv_gcc_unwind_find_fde=no
fi

if test -n "$sysheaders"; then
  CPPFLAGS=$OLD_CPPFLAGS
fi
# The Linux filesystem standard prescribes where to place "essential"
# files.  I.e., when the installation prefix is "/usr" we have to place
# shared library objects and the configuration files on the root partition
# in /lib and /etc.
if test "$prefix" = "/usr" -o "$prefix" = "/usr/"; then
  # 64bit libraries on sparc go to /lib64 and not /lib
  if test "$machine" = "sparc/sparc64" -o "$machine" = "x86_64"; then
    libc_cv_slibdir="/lib64"
    if test "$libdir" = '${exec_prefix}/lib'; then
      libdir='${exec_prefix}/lib64';
      # Locale data can be shared between 32bit and 64bit libraries
      libc_cv_localedir='${exec_prefix}/lib/locale'
    fi
  else
    libc_cv_slibdir="/lib"
  fi
  # Allow the user to override the path with --sysconfdir
  if test $sysconfdir = '${prefix}/etc'; then
    libc_cv_sysconfdir=/etc
  else
    libc_cv_sysconfdir=$sysconfdir
   fi
  libc_cv_rootsbindir="/sbin"
fi

# Under Linux the LinuxThreads add-on should be available.
case $add_ons in
  # It is available.  Good.
  *linuxthreads*)
    linuxthreads_missing=
    ;;
  *)
    linuxthreads_missing=yes
    ;;
esac

if test "$linuxthreads_missing"; then
  if test $enable_sanity = yes; then
    echo "\
*** On GNU/Linux systems it is normal to compile GNU libc with the
*** \`linuxthreads' add-on.  Without that, the library will be
*** incompatible with normal GNU/Linux systems.
*** If you really mean to not use this add-on, run configure again
*** using the extra parameter \`--disable-sanity-checks'."
    exit 1
  else
    echo "\
*** WARNING: Are you sure you do not want to use the \`linuxthreads'
*** add-on?"
  fi
fi

if test "$prefix" = "/usr/local" -o "$prefix" = "/usr/local/" -o "$prefix" = "NONE"; then
  if test $enable_sanity = yes; then
    echo "\
*** On GNU/Linux systems the GNU C Library should not be installed into
*** /usr/local since this might make your system totally unusable.
*** We strongly advise to use a different prefix.  For details read the FAQ.
*** If you really mean to do this, run configure again using the extra 
*** parameter \`--disable-sanity-checks'."
    exit 1
  else
    echo "\
*** WARNING: Do you really want to install the GNU C Library into /usr/local?
*** This might make your system totally unusable, for details read the FAQ."
  fi
fi


# One Linux we use ldconfig.
use_ldconfig=yes

# We need some extensions to the `ldd' script.

case "$machine" in
  i[3456]86* | m68*)
    ldd_rewrite_script=../sysdeps/unix/sysv/linux/ldd-rewrite.sed
    ;;
  ia64*)
    ldd_rewrite_script=../sysdeps/unix/sysv/linux/ia64/ldd-rewrite.sed
    ;;
  s390*)
    ldd_rewrite_script=../sysdeps/unix/sysv/linux/s390/ldd-rewrite.sed
    ;;
  sparc*)
    ldd_rewrite_script=../sysdeps/unix/sysv/linux/sparc/ldd-rewrite.sed
    ;;
  x86_64*)
    ldd_rewrite_script=../sysdeps/unix/sysv/linux/x86_64/ldd-rewrite.sed
    ;;
  *)
    ;;
esac


if test $host = $build; then
  # If $prefix/include/{net,scsi} are symlinks, make install will
  # clobber what they're linked to (probably a kernel tree).
  # test -L ought to work on all Linux boxes.
  if test "x$prefix" != xNONE; then
    ac_prefix=$prefix
  else
    ac_prefix=$ac_default_prefix
  fi
  echo $ac_n "checking for symlinks in ${ac_prefix}/include""... $ac_c" 1>&6
echo "configure:274: checking for symlinks in ${ac_prefix}/include" >&5
  ac_message=
  if test -L ${ac_prefix}/include/net; then
    ac_message="$ac_message
   ${ac_prefix}/include/net is a symlink"
  fi
  if test -L ${ac_prefix}/include/scsi; then
    ac_message="$ac_message
   ${ac_prefix}/include/scsi is a symlink"
  fi
  if test -n "$ac_message"; then
    { echo "configure: error: $ac_message
\`make install' will destroy the target of the link(s).
Delete the links and re-run configure, or better still, move the entire
${ac_prefix}/include directory out of the way." 1>&2; exit 1; }
  else
    echo "$ac_t""ok" 1>&6
  fi
fi