Install Gnu Make 4

Author: chrisbra

.github/workflows/ci.yml

@@ -361,22 +361,23 @@ jobs:
             sed -i.bak -f ci/config.mk.clang-12.sed ${SRCDIR}/auto/config.mk
           fi
 
+      - name: Install packages for testing
+        run: |
+          # Apple diff is broken. Use GNU diff instead. See #14032.
+          brew install diffutils make
+
       - name: Build
         env:
           LC_ALL: C
         run: |
-          make -d -j${NPROC}
+          gmake -d -j${NPROC}
 
       - name: Check version
         run: |
           "${SRCDIR}"/vim --version
           "${SRCDIR}"/vim -u NONE -i NONE --not-a-term -esNX -V1 -S ci/if_ver-1.vim -c quit
           "${SRCDIR}"/vim -u NONE -i NONE --not-a-term -esNX -V1 -S ci/if_ver-2.vim -c quit
 
-      - name: Install packages for testing
-        run: |
-          # Apple diff is broken. Use GNU diff instead. See #14032.
-          brew install diffutils
 
       - name: Test
         timeout-minutes: 20