1995-02-18 01:27:10 +00:00
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GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
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2015-11-25 01:48:22 +00:00
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dnl We need this setting because of the need for PLT calls in ld.so.
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2016-05-30 20:13:47 +00:00
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dnl See Roland's comment in
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dnl https://sourceware.org/bugzilla/show_bug.cgi?id=15605
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Introduce NO_RTLD_HIDDEN, make hurd use it instead of NO_HIDDEN
On the Hurd, the rtld needs to see its own dumb versions of a few functions
(defined in sysdeps/mach/hurd/dl-sysdep.c) overridden by libc's versions once
loaded. rtld should thus not have hidden attribute for these. To achieve this,
the Hurd port used to just define NO_HIDDEN, which disables it completely. For
now, this changes that to disabling it for all rtld functions, for simplicity.
See Roland's comment on https://sourceware.org/bugzilla/show_bug.cgi?id=15605#c5
The ld.so numbers remain at
8 .rel.plt 000000c8 00000c24 00000c24 00000c24 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
9 .plt 000001a0 00000cf0 00000cf0 00000cf0 2**4
CONTENTS, ALLOC, LOAD, READONLY, CODE
10 .plt.got 00000010 00000e90 00000e90 00000e90 2**3
CONTENTS, ALLOC, LOAD, READONLY, CODE
18 .got.plt 00000070 0002d000 0002d000 0002c000 2**2
CONTENTS, ALLOC, LOAD, DATA
which is about 3 times as much as on Linux.
The libc.so numbers get divided by 3 (the remainings are mostly RPC stub calls)
* include/libc-symbols.h [NO_RTLD_HIDDEN] (rtld_hidden_proto,
rtld_hidden_tls_proto, rtld_hidden_def, rtld_hidden_weak,
rtld_hidden_rtld_hidden_ver, data_def, rtld_hidden_data_weak,
rtld_hidden_data_ver): Define to empty.
* include/assert.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__assert_fail,
__assert_perror_fail): Likewise.
* include/dirent.h [IS_IN(rtld) && NO_RTLD_HIDDEN]
(__rewinddir): Likewise.
* include/libc-internal.h [IS_IN(rtld) && NO_RTLD_HIDDEN]
(__profile_frequency): Likewise.
* include/setjmp.h (__sigsetjmp): Likewise.
* include/signal.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__sigaction,
__libc_sigaction): Likewise.
* include/stdlib.h [NO_RTLD_HIDDEN] (unsetenv, __strtoul_internal): Do
not set hidden attribute.
* include/string.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__stpcpy, __strdup,
__strerror_t, __strsep_g, memchr, memcmp, memcpy, memmove, memset,
rawmemchr, stpcpy, strchr, strcmp, strlen, strnlen, strsep): Likewise.
* include/sys/stat.h [IS_IN(rtld) && NO_RTLD_HIDDEN] (__fxstat,
__fxstat64, __lxstat, __lxstat64, __xstat, __xstat64,
__fxstatat64): Likewise.
* include/sys/utsname.h [IS_IN(rtld) && NO_RTLD_HIDDEN]
(__uname): Likewise.
* include/sysdeps/generic/_itoa.h [IS_IN(rtld) && NO_RTLD_HIDDEN]
(_itoa_upper_digits, _itoa_lower_digits): Likewise.
* sysdeps/mach/hurd/configure.ac (NO_HIDDEN): Do not set.
(NO_RTLD_HIDDEN): Set.
* sysdeps/mach/hurd/configure: Refresh.
* config.h.in: Refresh.
2017-10-02 23:26:58 +00:00
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AC_DEFINE([NO_RTLD_HIDDEN])
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2015-11-25 01:48:22 +00:00
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2015-08-26 21:48:33 +00:00
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if test -n "$sysheaders"; then
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OLD_CPPFLAGS=$CPPFLAGS
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CPPFLAGS="$CPPFLAGS $SYSINCLUDES"
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fi
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2002-06-11 23:04:51 +00:00
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AC_CACHE_CHECK(Hurd header version, libc_cv_hurd_version, [dnl
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AC_TRY_COMPILE(dnl
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[#include <hurd/version.h>], [
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#define NEED_VERSION 20020609
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#if HURD_INTERFACE_VERSION < NEED_VERSION
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# error Hurd version too old: HURD_INTERFACE_VERSION < NEED_VERSION
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#endif],
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libc_cv_hurd_version=ok,
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libc_cv_hurd_version=bad)])
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if test "x$libc_cv_hurd_version" != xok; then
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AC_MSG_ERROR(Hurd headers not installed or too old)
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fi
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2015-08-26 21:48:33 +00:00
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if test -n "$sysheaders"; then
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CPPFLAGS=$OLD_CPPFLAGS
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fi
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2016-05-30 20:13:47 +00:00
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dnl ifunc does not work yet for static binaries
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dnl http://www.gnu.org/software/hurd/open_issues/ifunc.html
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libc_cv_ld_gnu_indirect_function=no
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