Merge commit '2bbb5abd877104fa9bc342c521bb49bc1aad50ce'

* commit '2bbb5abd877104fa9bc342c521bb49bc1aad50ce':
  build: Map -Wall compiler flag to -W3 for MSVC and -Wextra to -W4

Merged-by: Clément Bœsch <u@pkh.me>

diff --cc configure
index de290b199b1c765cedc8e2be0ecaadb14086405e,dde78b86575706c1d62ab5f69dad95f3ebe32996..f377b480dd2f9ac6e0652e5968d80ac1c25e1792
--- 1/configure
--- 2/configure
+++ b/configure
@@@ -3886,10 -3069,11 +3887,12 @@@ msvc_flags()
      msvc_common_flags "$@"
      for flag; do
          case $flag in
-             -Wall)                echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
+             -Wall)                echo -W3 -wd4018 -wd4146 -wd4244 -wd4305     \
+                                        -wd4554 ;;
+             -Wextra)              echo -W4 -wd4244 -wd4127 -wd4018 -wd4389     \
                                         -wd4146 -wd4057 -wd4204 -wd4706 -wd4305 \
                                         -wd4152 -wd4324 -we4013 -wd4100 -wd4214 \
 +                                       -wd4307 \
                                         -wd4273 -wd4554 -wd4701 -wd4703 ;;
          esac
      done