From: Benjamin Barenblat <bbaren@google.com>
Subject: Do not propagate -Wno-... flags into pkg-config files
Forwarded: not-needed

Lintian doesn't like any -W flags in pkg-config files, even if those flags
disable warnings.

--- a/CMake/AbseilHelpers.cmake
+++ b/CMake/AbseilHelpers.cmake
@@ -187,10 +187,7 @@
       endif()
     endforeach()
     foreach(cflag ${ABSL_CC_LIB_COPTS})
-      if(${cflag} MATCHES "^(-Wno|/wd)")
-        # These flags are needed to suppress warnings that might fire in our headers.
-        set(PC_CFLAGS "${PC_CFLAGS} ${cflag}")
-      elseif(${cflag} MATCHES "^(-W|/w[1234eo])")
+      if(${cflag} MATCHES "^(-W|/w[1234eo])")
         # Don't impose our warnings on others.
       elseif(${cflag} MATCHES "^-m")
         # Don't impose CPU instruction requirements on others, as