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# CHECK_LD_COPY_BUG()
# -------------------
# Check for binutils bug #16177 present in some versions of the bfd ld
# implementation affecting ARM relocations.
# https://sourceware.org/bugzilla/show_bug.cgi?id=16177
#
# $1 = the platform
#
AC_DEFUN([CHECK_LD_COPY_BUG],[
case $1 in
arm*linux*)
AC_CHECK_TARGET_TOOL([READELF], [readelf])
AC_CHECK_TARGET_TOOL([AS], [as])
AC_MSG_CHECKING([for ld bug 16177])
cat >actest.s <<-EOF
.globl _start
.p2align 4
_start:
bkpt
.data
.globl data_object
object_reference:
.long data_object
.size object_reference, 4
EOF
cat >aclib.s <<-EOF
.data
.globl data_object
.type data_object, %object
.size data_object, 4
data_object:
.long 123
EOF
$AS -o aclib.o aclib.s
$LD -shared -o aclib.so aclib.o
$AS -o actest.o actest.s
$LD -o actest actest.o aclib.so
if $READELF -r actest | grep R_ARM_COPY > /dev/null; then
AC_MSG_RESULT([affected])
AC_MSG_ERROR(
[Your linker is affected by binutils #16177, which
critically breaks linkage of GHC objects. Please either upgrade
binutils or supply a different linker with the LD environment
variable.])
else
AC_MSG_RESULT([unaffected])
fi
rm -f aclib.s aclib.o aclib.so actest.s actest.o actest
;;
*)
;;
esac
])
|
