Hello,
In configuring gcc, there's a check to determine if the linker has support for
STV_Hidden. It determines support by checking for the date in the linker's
version string.
On the other hand, the version string for the linker is constructed without a
date, bfd/Makefile.am recipe for bfdver.h.
I am enclosing the lines I am referring to in this email.
It looks like there's a disconnect. This results in incorrectly identifying a
linker with support for STV_HIDDEN as one that doesn't.
This is from GCC 8.3.1 and Binutils 2.31.1. Is this known/intended?
Thanks,
Visda
gcc/configure
if test $in_tree_ld != yes ; then
ld_ver=`$gcc_cv_ld --version 2>/dev/null | sed 1q`
if echo "$ld_ver" | grep GNU > /dev/null; then
if test x"$ld_is_gold" = xyes; then
# GNU gold --version looks like this:
#
# GNU gold (GNU Binutils 2.21.51.20110225) 1.11
#
# We extract the binutils version which is more familiar and specific
# than the gold version.
ld_vers=`echo $ld_ver | sed -n \
-e 's,^[^)]*[ ]\([0-9][0-9]*\.[0-9][0-9]*[^)]*\)) .*$,\1,p'`
else
# GNU ld --version looks like this:
#
# GNU ld (GNU Binutils) 2.21.51.20110225
ld_vers=`echo $ld_ver | sed -n \
-e 's,^.*[ ]\([0-9][0-9]*\.[0-9][0-9]*.*\)$,\1,p'`
fi
ld_date=`echo $ld_ver | sed -n
's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
<-------------------looking for a YYYY-MM-DD
ld_vers_major=`expr "$ld_vers" : '\([0-9]*\)'`
ld_vers_minor=`expr "$ld_vers" : '[0-9]*\.\([0-9]*\)'`
ld_vers_patch=`expr "$ld_vers" : '[0-9]*\.[0-9]*\.\([0-9]*\)'`
else
case "${target}" in
*-*-solaris2*)
# Solaris 2 ld -V output looks like this for a regular version:
...
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking linker for .hidden support"
>&5
$as_echo_n "checking linker for .hidden support... " >&6; }
if test "${gcc_cv_ld_hidden+set}" = set; then :
$as_echo_n "(cached) " >&6
else
if test $in_tree_ld = yes ; then
gcc_cv_ld_hidden=no
if test "$gcc_cv_gld_major_version" -eq 2 -a "$gcc_cv_gld_minor_version" -ge
13 -o "$gcc_cv_gld_major_version" -gt 2 \
&& test $in_tree_ld_is_elf = yes; then
gcc_cv_ld_hidden=yes
fi
else
gcc_cv_ld_hidden=yes
if test x"$ld_is_gold" = xyes; then
:
elif echo "$ld_ver" | grep GNU > /dev/null; then
case "${target}" in
mmix-knuth-mmixware)
# The linker emits by default mmo, not ELF, so "no" is appropriate.
gcc_cv_ld_hidden=no
;;
esac
if test 0"$ld_date" -lt 20020404; then <--------- linker released
before 20020404 doesn't support .hidden
if test -n "$ld_date"; then
# If there was date string, but was earlier than 2002-04-04, fail
gcc_cv_ld_hidden=no
bfd/Makefile.am
the default in development.sh is development=false
bfdver.h: $(srcdir)/version.h $(srcdir)/development.sh $(srcdir)/Makefile.in
@echo "creating $@"
@bfd_version=`echo "$(VERSION)" | $(SED) -e
's/\([^\.]*\)\.*\([^\.]*\)\.*\([^\.]*\)\.*\([^\.]*\)\.*\([^\.]*\).*/\1.00\2.00\3.00\4.00\5/'
-e 's/\([^\.]*\)\..*\(..\)\..*\(..\)\..*\(..\)\..*\(..\)$$/\1\2\3\4\5/'` ;\
bfd_version_string="\"$(VERSION)\"" ;\
bfd_soversion="$(VERSION)" ;\
bfd_version_package="\"$(PKGVERSION)\"" ;\
report_bugs_to="\"$(REPORT_BUGS_TO)\"" ;\
. $(srcdir)/development.sh ;\
if test "$$development" = true ; then \
bfd_version_date=`$(SED) -n -e 's/.*DATE //p' < $(srcdir)/version.h`
;\
bfd_version_string="\"$(VERSION).$${bfd_version_date}\"" ;\
bfd_soversion="$(VERSION).$${bfd_version_date}" ;\
fi ;\
$(SED) -e "s,@bfd_version@,$$bfd_version," \
-e "s,@bfd_version_string@,$$bfd_version_string," \
-e "s,@bfd_version_package@,$$bfd_version_package," \
-e "s,@report_bugs_to@,$$report_bugs_to," \
< $(srcdir)/version.h > $@; \
echo "$${bfd_soversion}" > libtool-soversion
