Support WINDOWS_EXPORT_ALL_SYMBOLS with `.def` files

The `WINDOWS_EXPORT_ALL_SYMBOLS` target property exports all symbols
found in object files explicitly given to the linker.  However, the
linker may also find additional symbols in dependencies and copy them
into the linked binary (e.g. from `msvcrt.lib`).  Provide a way to
export an explicit list of such symbols by adding a `.def` file as a
source file.

Fixes: #16473

1 files changed, 8 insertions, 0 deletions

diff --git a/Help/release/dev/module-def-and-WINDOWS_EXPORT_ALL_SYMBOLS.rst b/Help/release/dev/module-def-and-WINDOWS_EXPORT_ALL_SYMBOLS.rst
new file mode 100644
index 0000000..dfa9ef1
--- /dev/null
+++ b/Help/release/dev/module-def-and-WINDOWS_EXPORT_ALL_SYMBOLS.rst
@@ -0,0 +1,8 @@
+module-def-and-WINDOWS_EXPORT_ALL_SYMBOLS
+-----------------------------------------
+
+* The :prop_tgt:`WINDOWS_EXPORT_ALL_SYMBOLS` target property may now
+  be used in combination with explicit ``.def`` files in order to
+  export all symbols from the object files within a target plus
+  an explicit list of symbols that the linker finds in dependencies
+  (e.g. ``msvcrt.lib``).