2001-01-01 Philip Blundell <philb@gnu.org>

* ld-undefined/weak-undef.exp: New test.
	* ld-undefined/weak-undef.s, ld-undefined/weak-undef.t: Supporting
	files for above.

ld/testsuite/ChangeLog

@@ -1,5 +1,9 @@
 2001-01-01  Philip Blundell  <philb@gnu.org>
 
+	* ld-undefined/weak-undef.exp: New test.
+	* ld-undefined/weak-undef.s, ld-undefined/weak-undef.t: Supporting
+	files for above.
+
 	* ld-elfvers/vers.exp: Run test on Linux/ARM.
 	* ld-elfvsb/elfvsb.exp: Likewise.
 	* ld-shared/shared.exp: Likewise.

ld/testsuite/ld-undefined/weak-undef.exp

@@ -0,0 +1,54 @@
+# Test handling of weak undefined symbols
+
+set testname "weak undefined symbols"
+
+# This test only works for ELF targets.  It ought to work for some
+# a.out targets, but it doesn't.
+
+if { ![istarget *-*-sysv4*] \
+     && ![istarget *-*-unixware*] \
+     && ![istarget *-*-elf*] \
+     && ![istarget *-*-eabi*] \
+     && ![istarget *-*-linux*] \
+     && ![istarget *-*-irix5*] \
+     && ![istarget *-*-irix6*] \
+     && ![istarget *-*-solaris2*] } then {
+    return
+}
+
+if { [istarget *-*-linux*aout*] \
+     || [istarget *-*-linux*oldld*] } {
+    return
+}
+
+if {! [ld_assemble $as $srcdir/$subdir/weak-undef.s tmpdir/weak-undef.o]} then {
+    # It's OK if .weak doesn't work on this target.
+    unresolved $testname
+    return
+}
+
+# The linker should accept references to undefined weaks without error,
+# and resolve them to zero.
+
+set output_regexp \
+".*Contents of section .data:.*0000 00000000 11111111.*"
+
+if {! [ld_simple_link $ld tmpdir/weak-undef "$flags tmpdir/weak-undef.o -T $srcdir/$subdir/weak-undef.t"] } then {
+    fail $testname
+} else {
+    if {[which $objdump] == 0} then {
+	unresolved $testname
+	return
+    }
+
+    verbose -log "$objdump -s tmpdir/weak-undef"
+    catch "exec $objdump -s tmpdir/weak-undef" exec_output
+    set exec_output [prune_warnings $exec_output]
+    verbose -log $exec_output
+
+    if {[regexp $output_regexp $exec_output]} then {
+	pass $testname
+    } else {
+	fail $testname
+    }
+}

ld/testsuite/ld-undefined/weak-undef.s

@@ -0,0 +1,4 @@
+.data
+.weak foo
+.long foo
+.long 0x11111111

ld/testsuite/ld-undefined/weak-undef.t

@@ -0,0 +1,9 @@
+SECTIONS
+{
+  .data : {
+    tmpdir/weak-undef.o(.data)
+  }
+  /DISCARD/ : {
+    *(*)
+  }
+}