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GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
# Local configure fragment for sysdeps/sparc/elf.
# Check for support of thread-local storage handling in assembler and linker.
AC_CACHE_CHECK(for sparc TLS support, libc_cv_sparc_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
baz: 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
#ifdef __arch64__
ldx [%l7 + %l1], %l1, %tie_ldx(foo)
#else
ld [%l7 + %l1], %l1, %tie_ld(foo)
#endif
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} -c $CFLAGS conftest.S 1>&AS_MESSAGE_LOG_FD); then
libc_cv_sparc_tls=yes
else
libc_cv_sparc_tls=no
fi
rm -f conftest*])
if test $libc_cv_sparc_tls = no; then
AC_MSG_ERROR([the assembler must support TLS])
fi
# Check for GOTDATA relocation support in assembler and linker.
AC_CACHE_CHECK(for sparc binutils GOTDATA reloc support, libc_cv_sparc_gotdata, [dnl
changequote(,)dnl
cat > conftest.S <<\EOF
.data
.globl data
data: .word 0
.text
.globl foo
foo: sethi %gdop_hix22(data), %g1
xor %g1, %gdop_lox10(data), %g1
#ifdef __arch64__
ldx [%l7 + %g1], %g1, %gdop(data)
#else
ld [%l7 + %g1], %g1, %gdop(data)
#endif
EOF
changequote([,])dnl
dnl
if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.S 1>&AS_MESSAGE_LOG_FD); then
libc_cv_sparc_gotdata=yes
else
libc_cv_sparc_gotdata=no
fi
rm -f conftest*])
if test $libc_cv_sparc_gotdata = yes; then
AC_DEFINE(HAVE_BINUTILS_GOTDATA)
fi
# Check for a GCC emitting GOTDATA relocations.
AC_CACHE_CHECK(for sparc gcc GOTDATA reloc support, libc_cv_sparc_gcc_gotdata, [dnl
changequote(,)dnl
cat > conftest.c <<\EOF
int data;
int foo(void)
{
return data;
}
EOF
changequote([,])dnl
dnl
libc_cv_sparc_gcc_gotdata=no
if AC_TRY_COMMAND(${CC-cc} -S $CFLAGS -O2 -fPIC conftest.c 1>&AS_MESSAGE_LOG_FD); then
if grep -q 'gdop_hix22' conftest.s \
&& grep -q 'gdop_lox10' conftest.s; then
libc_cv_sparc_gcc_gotdata=yes
fi
fi
rm -f conftest*])
if test $libc_cv_sparc_gcc_gotdata = yes; then
AC_DEFINE(HAVE_GCC_GOTDATA)
fi
if test $libc_cv_sparc_gcc_gotdata = yes \
&& test $libc_cv_sparc_gotdata = yes; then
AC_DEFINE(PI_STATIC_AND_HIDDEN)
fi
|
