From: Bruno Pitrus <brunopitrus@hotmail.com>
Subject: Do not leak -maes -msse4.1 into pkgconfig
Forwarded: https://github.com/abseil/abseil-cpp/pull/1216
Origin: upstream, https://github.com/abseil/abseil-cpp/commit/09e96049995584c3489e4bd1467313e3e85af99c

--- a/CMake/AbseilHelpers.cmake
+++ b/CMake/AbseilHelpers.cmake
@@ -166,6 +166,8 @@
           set(PC_CFLAGS "${PC_CFLAGS} ${cflag}")
         elseif(${cflag} MATCHES "^(-W|/w[1234eo])")
           # Don't impose our warnings on others.
+        elseif(${cflag} MATCHES "^-m")
+          # Don't impose CPU instruction requirements on others, as the code performs feature detection on runtime.
         else()
           set(PC_CFLAGS "${PC_CFLAGS} ${cflag}")
         endif()