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
|
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
# 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
define([LIBC_LINUX_VERSION],[2.0.10])dnl
if test -n "$sysheaders"; then
OLD_CPPFLAGS=$CPPFLAGS
CPPFLAGS="$CPPFLAGS $SYSINCLUDES"
fi
define([libc_cv_linuxVER], [libc_cv_linux]patsubst(LIBC_LINUX_VERSION,[\.]))dnl
AC_CACHE_CHECK(installed Linux kernel header files, libc_cv_linuxVER, [dnl
AC_EGREP_CPP([eat flaming death], [#include <linux/version.h>
#if !defined LINUX_VERSION_CODE || LINUX_VERSION_CODE < ]dnl
patsubst(LIBC_LINUX_VERSION,[^\([^.]*\)\.\([^.]*\)\.\([^.]*\)$],dnl
[ (\1 *65536+ \2 *256+ \3) /* \1.\2.\3 */])[
eat flaming death
#endif],
libc_cv_linuxVER='TOO OLD!',
libc_cv_linuxVER='LIBC_LINUX_VERSION or later')])
if test "$libc_cv_linuxVER" != 'LIBC_LINUX_VERSION or later'; then
AC_MSG_ERROR([GNU libc requires kernel header files from
Linux LIBC_LINUX_VERSION 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 LIBC_LINUX_VERSION 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.])
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. If a previous configure fragment
# set arch_minimum_kernel already, let that override our defaults here.
# Note that we presume such a fragment has set libc_cv_gcc_unwind_find_fde
# if appropriate too.
test -n "$arch_minimum_kernel" ||
case "$machine" in
i386*)
libc_cv_gcc_unwind_find_fde=yes
arch_minimum_kernel=2.0.10
;;
powerpc/powerpc32)
libc_cv_gcc_unwind_find_fde=yes
arch_minimum_kernel=2.0.10
;;
powerpc/powerpc64)
arch_minimum_kernel=2.4.21
;;
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/sparc64*)
libc_cv_gcc_unwind_find_fde=yes
arch_minimum_kernel=2.4.21
;;
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 "$minimum_kernel"; then
changequote(,)
user_version=$((`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/'`))
changequote([,])
if test $user_version -lt $arch_version; then
AC_MSG_WARN([minimum kernel version reset to $arch_minimum_kernel])
minimum_kernel=$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
AC_MSG_CHECKING(for kernel header at least $minimum_kernel)
changequote(,)dnl
decnum=`echo "$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/'`;
changequote([,])dnl
AC_EGREP_CPP([eat flaming death], [#include <linux/version.h>
#if LINUX_VERSION_CODE < $decnum
eat flaming death
#endif], libc_minimum_kernel='too old!', libc_minimum_kernel=ok)
AC_MSG_RESULT($libc_minimum_kernel)
if test "$libc_minimum_kernel" = ok; then
AC_DEFINE_UNQUOTED(__LINUX_KERNEL_VERSION, $decnum)
AC_DEFINE_UNQUOTED(__ABI_TAG_VERSION, $abinum)
else
AC_MSG_ERROR([*** The available kernel headers are older than the requested
*** compatible kernel version])
fi
fi
# The result of the above test for the use of the FDE code is invalid if
# the user overrides the decision about the minimum ABI.
if test "$oldest_abi" != default && test "2.2.4" \< "$oldest_abi"; then
libc_cv_gcc_unwind_find_fde=no
fi
if test -n "$sysheaders"; then
CPPFLAGS=$OLD_CPPFLAGS
fi
# The Linux filesystem standard prescribes where to place "essential"
# files. I.e., when the installation prefix is "/usr" we have to place
# shared library objects and the configuration files on the root partition
# in /lib and /etc.
case "$prefix" in
/usr | /usr/)
# 64-bit libraries on bi-arch platforms go in /lib64 instead of /lib.
# Allow earlier configure scripts to handle libc_cv_slibdir, libdir,
# and libc_cv_localedir.
test -n "$libc_cv_slibdir" || \
case $machine in
sparc/sparc64 | x86_64 | powerpc/powerpc64 | s390/s390-64)
libc_cv_slibdir="/lib64"
if test "$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
;;
*)
libc_cv_slibdir="/lib"
;;
esac
# 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"
;;
esac
# Under Linux the NPTL add-on should be available.
case $add_ons in
# It is available. Good.
*nptl*)
nptl_missing=
;;
*)
nptl_missing=yes
;;
esac
if test "$nptl_missing"; then
if test $enable_sanity = yes; then
echo "\
*** On GNU/Linux systems it is normal to compile GNU libc with the
*** \`nptl' add-on. Without that, the library will be
*** incompatible with normal GNU/Linux systems.
*** If you really mean to not use this add-on, run configure again
*** using the extra parameter \`--disable-sanity-checks'."
exit 1
else
echo "\
*** WARNING: Are you sure you do not want to use the \`nptl'
*** add-on?"
fi
fi
if test "$prefix" = "/usr/local" -o "$prefix" = "/usr/local/" -o "$prefix" = "NONE"; then
if test $enable_sanity = yes; then
echo "\
*** On GNU/Linux systems the GNU C Library should not be installed into
*** /usr/local since this might make your system totally unusable.
*** We strongly advise to use a different prefix. For details read the FAQ.
*** If you really mean to do this, run configure again using the extra
*** parameter \`--disable-sanity-checks'."
exit 1
else
echo "\
*** WARNING: Do you really want to install the GNU C Library into /usr/local?
*** This might make your system totally unusable, for details read the FAQ."
fi
fi
# One Linux we use ldconfig.
use_ldconfig=yes
# We need some extensions to the `ldd' script.
changequote(,)
case "$machine" in
i[3456]86*)
ldd_rewrite_script=sysdeps/unix/sysv/linux/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
;;
powerpc*)
ldd_rewrite_script=sysdeps/unix/sysv/linux/powerpc/ldd-rewrite.sed
;;
*)
;;
esac
changequote([,])
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
AC_MSG_CHECKING([for symlinks in ${ac_prefix}/include])
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
AC_MSG_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.])
else
AC_MSG_RESULT(ok)
fi
fi
# We have inlined syscalls.
AC_DEFINE(HAVE_INLINED_SYSCALLS)
|
