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