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Remove NO_CTORS_DTORS_SECTIONS macro

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This was originally added to support binutils older than version
2.22:

  <https://sourceware.org/ml/libc-alpha/2010-12/msg00051.html>

Since 2.22 is older than the minimum required binutils version
for building glibc, we no longer need this.  (The changes do
not impact the statically linked startup code.)
This commit is contained in:
Florian Weimer
2020-05-18 14:56:26 +02:00
parent 7b5bfe7783
commit ce12fc7113
10 changed files with 3 additions and 158 deletions
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53
configure vendored
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@ -5753,59 +5753,6 @@ if test $libc_cv_have_sdata_section = yes; then
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to use .ctors/.dtors header and trailer" >&5
$as_echo_n "checking whether to use .ctors/.dtors header and trailer... " >&6; }
if ${libc_cv_ctors_header+:} false; then :
$as_echo_n "(cached) " >&6
else
libc_cv_ctors_header=yes
cat > conftest.c <<EOF
int _start (void) { return 0; }
int __start (void) { return 0; }
__attribute__ ((constructor)) void ctor (void) { asm (""); }
__attribute__ ((destructor)) void dtor (void) { asm (""); }
EOF
if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp -o conftest
conftest.c -static -nostartfiles -nostdlib
1>&5'
{ { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
(eval $ac_try) 2>&5
ac_status=$?
$as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
test $ac_status = 0; }; }; then :
if $READELF -WS conftest$ac_exeext | $AWK '
{ gsub(/\[ */, "[") }
$2 == ".ctors" || $2 == ".dtors" {
size = strtonum("0x" $6)
align = strtonum("0x" $NF)
seen[$2] = 1
stub[$2] = size == align * 2
}
END {
ctors_ok = !seen[".ctors"] || stub[".ctors"]
dtors_ok = !seen[".dtors"] || stub[".dtors"]
exit ((ctors_ok && dtors_ok) ? 0 : 1)
}
'; then :
libc_cv_ctors_header=no
fi
else
as_fn_error $? "missing __attribute__ ((constructor)) support??" "$LINENO" 5
fi
rm -f conftest*
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_ctors_header" >&5
$as_echo "$libc_cv_ctors_header" >&6; }
if test $libc_cv_ctors_header = no; then
$as_echo "#define NO_CTORS_DTORS_SECTIONS 1" >>confdefs.h
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for libunwind-support in compiler" >&5
$as_echo_n "checking for libunwind-support in compiler... " >&6; }
if ${libc_cv_cc_with_libunwind+:} false; then :