From: Benjamin Barenblat <bbaren@google.com>
Subject: Eliminate libabsl_flags.so and libabsl_flags.a
Forwarded: not-needed

The libabsl_flags library only contains code when compiling with MSVC, which
Debian doesn't use. Skip compiling absl/flags/flag.cc, and make the Abseil flags
library header-only.

--- a/absl/flags/CMakeLists.txt
+++ b/absl/flags/CMakeLists.txt
@@ -199,8 +199,6 @@
 absl_cc_library(
   NAME
     flags
-  SRCS
-    "flag.cc"
   HDRS
     "declare.h"
     "flag.h"