1 GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
2 # Local configure fragment for sysdeps/sparc/sparc64/elf.
4 if test "$usetls" != no; then
5 # Check for support of thread-local storage handling in assembler and linker.
6 AC_CACHE_CHECK(for sparc64 TLS support, libc_cv_sparc64_tls, [dnl
8 cat > conftest.s <<\EOF
9 .section ".tdata", "awT", @progbits
12 .section ".tbss", "awT", @nobits
17 main: sethi %tgd_hi22(foo), %l1
18 add %l1, %tgd_lo10(foo), %l1
19 add %l7, %l1, %o0, %tgd_add(foo)
20 call __tls_get_addr, %tgd_call(foo)
21 sethi %tldm_hi22(bar), %l1
22 add %l1, %tldm_lo10(bar), %l1
23 add %l7, %l1, %o0, %tldm_add(bar)
24 call __tls_get_addr, %tldm_call(bar)
25 sethi %tldo_hix22(bar), %l1
26 xor %l1, %tldo_lox10(bar), %l1
27 add %o0, %l1, %l1, %tldo_add(bar)
28 sethi %tie_hi22(foo), %l1
29 add %l1, %tie_lo10(foo), %l1
30 ldx [%l7 + %l1], %l1, %tie_ldx(foo)
31 add %g7, %l1, %l1, %tie_add(foo)
32 sethi %tle_hix22(foo), %l1
33 xor %l1, %tle_lox10(foo), %l1
37 if AC_TRY_COMMAND(${CC-cc} -o conftest.bin $CFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
38 libc_cv_sparc64_tls=yes
40 libc_cv_sparc64_tls=no
43 if test $libc_cv_sparc64_tls = yes; then
44 AC_DEFINE(HAVE_TLS_SUPPORT)
48 # Check for broken WDISP22 in the linker.
49 AC_CACHE_CHECK(for sparc64 ld WDISP22 handling, libc_cv_sparc64_wdisp22, [dnl
50 echo 'bne foo; nop' > conftest1.s
51 echo '.globl foo; .hidden foo; foo: nop' > conftest2.s
52 libc_cv_sparc64_wdisp22=unknown
53 if AC_TRY_COMMAND(${CC-cc} -nostdlib -shared $CFLAGS conftest1.s conftest2.s -o conftest.so 1>&AS_MESSAGE_LOG_FD); then
54 if readelf -r conftest.so | grep -q R_SPARC_WDISP22; then
55 libc_cv_sparc64_wdisp22=broken
57 libc_cv_sparc64_wdisp22=ok
61 if test $libc_cv_sparc64_wdisp22 != ok; then
62 AC_DEFINE(BROKEN_SPARC_WDISP22)