Cache make install calls in macos action

.github/workflows/mac.yml

@@ -167,29 +167,33 @@ jobs:
         id: cache-opus
         uses: actions/cache@v2
         with:
-          path: ${{ env.LibrariesPath }}/opus
+          path: ${{ env.LibrariesPath }}/opus-cache
           key: ${{ runner.OS }}-opus-${{ env.CACHE_KEY }}
-      - name: Opus.
+      - name: Opus clone.
+        run: |
+          cd $LibrariesPath
+
+          git clone -b v1.3 --depth=1 $GIT/xiph/opus
+      - name: Opus build.
         if: steps.cache-opus.outputs.cache-hit != 'true'
         run: |
           cd $LibrariesPath
 
-          git clone $GIT/xiph/opus
           cd opus
-          git checkout v1.3
           ./autogen.sh
           CFLAGS="$MIN_MAC $UNGUARDED" CPPFLAGS="$MIN_MAC $UNGUARDED" LDFLAGS="$MIN_MAC" ./configure --prefix=$PREFIX
           make -j$(nproc)
+          sudo make DESTDIR="$LibrariesPath/opus-cache" install
       - name: Opus install.
         run: |
-          cd $LibrariesPath/opus
-          sudo make install
+          cd $LibrariesPath
+          sudo cp -R opus-cache/. /
 
       - name: Libiconv cache.
         id: cache-libiconv
         uses: actions/cache@v2
         with:
-          path: ${{ env.LibrariesPath }}/${{ env.LIBICONV_VER }}
+          path: ${{ env.LibrariesPath }}/libiconv-cache
           key: ${{ runner.OS }}-${{ env.LIBICONV_VER }}-${{ env.CACHE_KEY }}
       - name: Libiconv.
         if: steps.cache-libiconv.outputs.cache-hit != 'true'
@@ -201,10 +205,11 @@ jobs:
           cd $LIBICONV_VER
           CFLAGS="$MIN_MAC $UNGUARDED" CPPFLAGS="$MIN_MAC $UNGUARDED" LDFLAGS="$MIN_MAC" ./configure --enable-static --prefix=$PREFIX
           make -j$(nproc)
+          sudo make DESTDIR="$LibrariesPath/libiconv-cache" install
       - name: Libiconv install.
         run: |
-          cd $LibrariesPath/$LIBICONV_VER
-          sudo make install
+          cd $LibrariesPath
+          sudo cp -R libiconv-cache/. /
 
       - name: FFmpeg cache.
         id: cache-ffmpeg