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GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
# Local configure fragment for sysdeps/sparc/sparc64/elf.
# Check for support of thread-local storage handling in assembler and linker.
AC_CACHE_CHECK(for sparc64 TLS support, libc_cv_sparc64_tls, [dnl
changequote(,)dnl
cat > conftest.s <<\EOF
.section ".tdata", "awT", @progbits
.globl foo
foo: .word 1
.section ".tbss", "awT", @nobits
.globl bar
bar: .skip 4
.text
.globl _start
_start: sethi %tgd_hi22(foo), %l1
add %l1, %tgd_lo10(foo), %l1
add %l7, %l1, %o0, %tgd_add(foo)
call __tls_get_addr, %tgd_call(foo)
sethi %tldm_hi22(bar), %l1
add %l1, %tldm_lo10(bar), %l1
add %l7, %l1, %o0, %tldm_add(bar)
call __tls_get_addr, %tldm_call(bar)
sethi %tldo_hix22(bar), %l1
xor %l1, %tldo_lox10(bar), %l1
add %o0, %l1, %l1, %tldo_add(bar)
sethi %tie_hi22(foo), %l1
add %l1, %tie_lo10(foo), %l1
ldx [%l7 + %l1], %l1, %tie_ldx(foo)
add %g7, %l1, %l1, %tie_add(foo)
sethi %tle_hix22(foo), %l1
xor %l1, %tle_lox10(foo), %l1
EOF
changequote([,])dnl
dnl
if AC_TRY_COMMAND(${CC-cc} -o conftest.bin $CFLAGS $LDFLAGS conftest.s -nostdlib -nostartfiles 1>&AS_MESSAGE_LOG_FD); then
libc_cv_sparc64_tls=yes
else
libc_cv_sparc64_tls=no
fi
rm -f conftest*])
if test $libc_cv_sparc64_tls = no; then
AC_MSG_ERROR([the assembler must support TLS])
fi
# Check for broken WDISP22 in the linker.
AC_CACHE_CHECK(for sparc64 ld WDISP22 handling, libc_cv_sparc64_wdisp22, [dnl
echo 'bne foo; nop' > conftest1.s
echo '.globl foo; .hidden foo; foo: nop' > conftest2.s
libc_cv_sparc64_wdisp22=unknown
if AC_TRY_COMMAND(${CC-cc} -nostdlib -shared $CFLAGS conftest1.s conftest2.s -o conftest.so 1>&AS_MESSAGE_LOG_FD); then
if readelf -r conftest.so | grep -q R_SPARC_WDISP22; then
libc_cv_sparc64_wdisp22=broken
else
libc_cv_sparc64_wdisp22=ok
fi
fi
rm -f conftest*])
if test $libc_cv_sparc64_wdisp22 != ok; then
AC_DEFINE(BROKEN_SPARC_WDISP22)
fi
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