[PATCH 3/6] Add sparc configure checks for GOTDATA support.

[David Miller <davem at davemloft dot net>]

	* config.h.in (HAVE_BINUTILS_GOTDATA): New.
	(HAVE_GCC_GOTDATA): New.
	* sysdeps/sparc/elf/configure.in: Test for GOTDATA
	relocation support in both binutils and gcc.
	* sysdeps/sparc/elf/configure: Regenerate.
---
 ChangeLog                      |    6 +++
 config.h.in                    |    6 +++
 sysdeps/sparc/elf/configure    |   73 ++++++++++++++++++++++++++++++++++++++++
 sysdeps/sparc/elf/configure.in |   53 +++++++++++++++++++++++++++++
 4 files changed, 138 insertions(+), 0 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index af25b40..6eb14f6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,11 @@
 2012-02-20  David S. Miller  <davem@davemloft.net>
 
+	* config.h.in (HAVE_BINUTILS_GOTDATA): New.
+	(HAVE_GCC_GOTDATA): New.
+	* sysdeps/sparc/elf/configure.in: Test for GOTDATA
+	relocation support in both binutils and gcc.
+	* sysdeps/sparc/elf/configure: Regenerate.
+
 	* sysdeps/sparc/sparc32/elf/configure.in: Delete.
 	* sysdeps/sparc/sparc32/elf/configure: Delete.
 	* sysdeps/sparc/sparc64/elf/configure.in: Delete.
diff --git a/config.h.in b/config.h.in
index 53c6823..b503454 100644
--- a/config.h.in
+++ b/config.h.in
@@ -87,6 +87,12 @@
    certain registers (CR0, MQ, CTR, LR) in asm statements.  */
 #undef	BROKEN_PPC_ASM_CR0
 
+/* Defined on SPARC if as and ld both support GOTDATA relocations.  */
+#undef  HAVE_BINUTILS_GOTDATA
+
+/* Defined on SPARC if GCC emits GOTDATA relocations.  */
+#undef  HAVE_GCC_GOTDATA
+
 /* Define if the linker supports the -z combreloc option.  */
 #undef	HAVE_Z_COMBRELOC
 
diff --git a/sysdeps/sparc/elf/configure b/sysdeps/sparc/elf/configure
index 78dc977..67a4039 100644
--- a/sysdeps/sparc/elf/configure
+++ b/sysdeps/sparc/elf/configure
@@ -136,3 +136,76 @@ $as_echo "$libc_cv_sparc_tls" >&6; }
 if test $libc_cv_sparc_tls = no; then
   as_fn_error $? "the assembler must support TLS" "$LINENO" 5
 fi
+
+# Check for GOTDATA relocation support in assembler and linker.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sparc binutils GOTDATA reloc support" >&5
+$as_echo_n "checking for sparc binutils GOTDATA reloc support... " >&6; }
+if ${libc_cv_sparc_gotdata+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat > conftest.S <<\EOF
+	.data
+	.globl	data
+data:	.word	0
+	.text
+	.globl	foo
+foo:	sethi	%gdop_hix22(data), %g1
+	xor	%g1, %gdop_lox10(data), %g1
+#ifdef __arch64__
+	ldx	[%l7 + %g1], %g1, %gdop(data)
+#else
+	ld	[%l7 + %g1], %g1, %gdop(data)
+#endif
+EOF
+if { ac_try='${CC-cc} -c $CFLAGS conftest.S 1>&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; then
+  libc_cv_sparc_gotdata=yes
+else
+  libc_cv_sparc_gotdata=no
+fi
+rm -f conftest*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_sparc_gotdata" >&5
+$as_echo "$libc_cv_sparc_gotdata" >&6; }
+if test $libc_cv_sparc_gotdata = yes; then
+  $as_echo "#define HAVE_BINUTILS_GOTDATA 1" >>confdefs.h
+
+fi
+
+# Check for a GCC emitting GOTDATA relocations.
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for sparc gcc GOTDATA reloc support" >&5
+$as_echo_n "checking for sparc gcc GOTDATA reloc support... " >&6; }
+if ${libc_cv_sparc_gcc_gotdata+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat > conftest.c <<\EOF
+int data;
+int foo(void)
+{
+	return data;
+}
+EOF
+libc_cv_sparc_gcc_gotdata=no
+if { ac_try='${CC-cc} -S $CFLAGS -O2 -fPIC conftest.c 1>&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }; 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*
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_sparc_gcc_gotdata" >&5
+$as_echo "$libc_cv_sparc_gcc_gotdata" >&6; }
+if test $libc_cv_sparc_gcc_gotdata = yes; then
+  $as_echo "#define HAVE_GCC_GOTDATA 1" >>confdefs.h
+
+fi
diff --git a/sysdeps/sparc/elf/configure.in b/sysdeps/sparc/elf/configure.in
index c22a7c5..ab8b189 100644
--- a/sysdeps/sparc/elf/configure.in
+++ b/sysdeps/sparc/elf/configure.in
@@ -45,3 +45,56 @@ 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
-- 
1.7.6.401.g6a319