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glibc/ports/sysdeps/alpha/configure.in
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GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. | |
# Local configure fragment for sysdeps/alpha. | |
# Check for support of thread-local storage handling in assembler and linker. | |
AC_CACHE_CHECK(for Alpha TLS support, libc_cv_alpha_tls, [dnl | |
cat > conftest.s <<\EOF | |
.section ".tdata", "awT", @progbits | |
.globl foo | |
foo: .quad 1 | |
.section ".tbss", "awT", @nobits | |
.globl bar | |
bar: .skip 8 | |
.text | |
baz: | |
.set nomacro | |
ldq $27, __tls_get_addr($29) !literal!1 | |
ldq $16, a($29) !tlsgd!1 | |
jsr $26, ($27), __tls_get_addr !lituse_tlsgd!1 | |
jsr $26, ($27), __tls_get_addr !lituse_tlsldm!2 | |
ldq $27, __tls_get_addr($29) !literal!2 | |
ldq $16, b($29) !tlsldm!2 | |
ldq $16, c($29) !tlsgd | |
ldq $16, d($29) !tlsldm | |
ldq $16, e($29) !tlsgd!3 | |
ldq $16, f($29) !tlsldm!4 | |
ldq $16, g($29) !gotdtprel | |
ldah $16, h($31) !dtprelhi | |
lda $16, i($16) !dtprello | |
lda $16, j($31) !dtprel | |
ldq $16, k($29) !gottprel | |
ldah $16, l($31) !tprelhi | |
lda $16, m($16) !tprello | |
lda $16, n($31) !tprel | |
EOF | |
dnl | |
if AC_TRY_COMMAND(${CC-cc} -c $CFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then | |
libc_cv_alpha_tls=yes | |
else | |
libc_cv_alpha_tls=no | |
fi | |
rm -f conftest*]) | |
if test $libc_cv_alpha_tls = no; then | |
AC_MSG_ERROR([the assembler must support TLS]) | |
fi | |
AC_CACHE_CHECK(for GP relative module local relocs, libc_cv_alpha_hidden_gprel, [dnl | |
cat > conftest.c <<\EOF | |
static volatile int bar; | |
int baz __attribute__((visibility("hidden"))); | |
int f(void) { return bar + baz; } | |
EOF | |
dnl | |
libc_cv_alpha_hidden_gprel=no | |
if AC_TRY_COMMAND(${CC-cc} -S $CFLAGS -O2 -fpic conftest.c 1>&AS_MESSAGE_LOG_FD); then | |
if grep -q 'bar.*!gprel' conftest.s \ | |
&& grep -q 'baz.*!gprel' conftest.s \ | |
&& ! grep -q 'bar.*!literal' conftest.s \ | |
&& ! grep -q 'baz.*!literal' conftest.s; then | |
libc_cv_alpha_hidden_gprel=yes | |
fi | |
fi | |
rm -f conftest*]) | |
if test $libc_cv_alpha_hidden_gprel = yes; then | |
AC_DEFINE(PI_STATIC_AND_HIDDEN) | |
fi |