7zip: Build 7z.dll

Also remove -Werror flags entirely

mingw-w64-7zip/PKGBUILD

@@ -4,7 +4,7 @@ _realname=7zip
 pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
 pkgver=22.01
-pkgrel=2
+pkgrel=3
 pkgdesc="A file archiver with a high compression ratio (mingw-w64)"
 arch=('any')
 mingw_arch=('mingw32' 'mingw64' 'ucrt64' 'clang64' 'clang32' 'clangarm64')
@@ -20,7 +20,7 @@ sha256sums=('393098730c70042392af808917e765945dc2437dee7aae3cfcc4966eb920fbc5'
 prepare () {
   case ${MSYSTEM} in
     CLANG*)
-      sed -i 's/-Werror/& -Wno-error=missing-exception-spec -Wno-error=unused-but-set-variable -Wno-error=unknown-attributes/' */*.mak */*/*.mak
+      sed -i 's/-Werror/ -Wno-missing-exception-spec -Wno-unused-but-set-variable -Wno-unknown-attributes/' */*.mak */*/*.mak
       # This patch can be dropped once we're using Clang 16 or later
       patch -p0 -i "${srcdir}/clang-arm-target-fixes.patch"
       ;;
@@ -30,6 +30,7 @@ prepare () {
 build() {
   cd "${srcdir}"/
 
+  make -C CPP/7zip/Bundles/Format7zF -f makefile.gcc
   make -C CPP/7zip/UI/Console -f makefile.gcc
   make -C CPP/7zip/Bundles/SFXCon -f makefile.gcc
 }
@@ -37,6 +38,7 @@ build() {
 package() {
   cd "${srcdir}"
 
+  install -D -m755 CPP/7zip/Bundles/Format7zF/_o/7z.dll "${pkgdir}"${MINGW_PREFIX}/bin/7z.dll
   install -D -m755 CPP/7zip/UI/Console/_o/7z.exe "${pkgdir}"${MINGW_PREFIX}/bin/7z.exe
   install -D -m755 CPP/7zip/Bundles/SFXCon/_o/7zCon.exe "${pkgdir}"${MINGW_PREFIX}/lib/7zip/7zCon.sfx