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-rw-r--r--ports/sysdeps/alpha/configure.in71
1 files changed, 71 insertions, 0 deletions
diff --git a/ports/sysdeps/alpha/configure.in b/ports/sysdeps/alpha/configure.in
new file mode 100644
index 0000000000..bf8e926657
--- /dev/null
+++ b/ports/sysdeps/alpha/configure.in
@@ -0,0 +1,71 @@
+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