Vendor import of clang trunk r256633:

https://llvm.org/svn/llvm-project/cfe/trunk@256633

1 files changed, 12 insertions, 0 deletions

diff --git a/docs/CommandGuide/clang.rst b/docs/CommandGuide/clang.rst
index 39dbe02..2b45695 100644
--- a/docs/CommandGuide/clang.rst
+++ b/docs/CommandGuide/clang.rst
@@ -257,6 +257,18 @@ Code Generation Options
 
   Generate debug information.  Note that Clang debug information works best at -O0.
 
+.. option:: -gmodules
+
+  Generate debug information that contains external references to
+  types defined in clang modules or precompiled headers instead of
+  emitting redundant debug type information into every object file.
+  This option implies :option:`-fmodule-format=obj`.
+
+  This option should not be used when building static libraries for
+  distribution to other machines because the debug info will contain
+  references to the module cache on the machine the object files in
+  the library were built on.
+  
 .. option:: -fstandalone-debug -fno-standalone-debug
 
   Clang supports a number of optimizations to reduce the size of debug