[COFF] Allow exporting all symbols from system libraries specfied with -wholearchive:
When building a shared libc++.dll, it pulls in libc++abi.a statically
with the --wholearchive flag. If such a build is done with
--export-all-symbols, it's reasonable to assume that everything
from that library also should be exported with the same rules as normal
local object files, even though we normally avoid autoexporting things
from libc++abi.a in other cases when linking a DLL (user code).
Differential Revision: https://reviews.llvm.org/D51529
llvm-svn: 341403
diff --git a/lld/test/COFF/export-all.s b/lld/test/COFF/export-all.s
index 9ec5fd1..3d80603 100644
--- a/lld/test/COFF/export-all.s
+++ b/lld/test/COFF/export-all.s
@@ -77,6 +77,18 @@
# CHECK-EXCLUDE-NEXT: foobar @1
# CHECK-EXCLUDE-NEXT: EOF
+# Test that libraries included with -wholearchive: are autoexported, even if
+# they are in a library that otherwise normally would be excluded.
+
+# RUN: lld-link -out:%t.dll -dll -entry:DllMainCRTStartup %t.main.obj -lldmingw %T/libs/crt2.o -wholearchive:%T/libs/libmingwex.a -output-def:%t.def
+# RUN: echo "EOF" >> %t.def
+# RUN: cat %t.def | FileCheck -check-prefix=CHECK-WHOLEARCHIVE %s
+
+# CHECK-WHOLEARCHIVE: EXPORTS
+# CHECK-WHOLEARCHIVE-NEXT: foobar @1
+# CHECK-WHOLEARCHIVE-NEXT: mingwfunc @2
+# CHECK-WHOLEARCHIVE-NEXT: EOF
+
# Test that we handle import libraries together with -opt:noref.
# RUN: yaml2obj < %p/Inputs/hello32.yaml > %t.obj
