.github/workflows/ci.yml | 32 +++++++++-----------------------

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9394e0c6cb4808362468f2aaacf46c293b7f5de8..57295188c8105730bf16aa83610d268dbd1dbdec 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -43,26 +43,12 @@       - name: Compile patches with gcc
         env:
           CC: gcc
         run: |
-          export CFLAGS="$CFLAGS -Werror"
-          make clean
-          echo "########## O_NAMEFIRST=1 ##########"
-          make O_NAMEFIRST=1
-          make clean
-          echo "########## O_GITSTATUS=1 ##########"
-          make O_GITSTATUS=1
-          make clean
-          echo "########## O_RESTOREPREVIEW=1 ##########"
-          make O_RESTOREPREVIEW=1
-          make clean
-          echo "########## O_NAMEFIRST=1 O_GITSTATUS=1 ##########"
-          make O_NAMEFIRST=1 O_GITSTATUS=1
-          make clean
-          echo "########## O_NAMEFIRST=1 O_RESTOREPREVIEW=1 ##########"
-          make O_NAMEFIRST=1 O_RESTOREPREVIEW=1
-          make clean
-          echo "########## O_GITSTATUS=1 O_RESTOREPREVIEW=1 ##########"
-          make O_GITSTATUS=1 O_RESTOREPREVIEW=1
-          make clean
-          echo "########## O_NAMEFIRST=1 O_GITSTATUS=1 O_RESTOREPREVIEW=1 ##########"
-          make O_NAMEFIRST=1 O_GITSTATUS=1 O_RESTOREPREVIEW=1
-          make clean
+          patches=("O_GITSTATUS" "O_NAMEFIRST" "O_RESTOREPREVIEW")
+          z=$(( 1 << ${#patches[@]} ))
+          for ((n=1; n < z; ++n)); do
+            for ((i=0; i < ${#patches[@]}; ++i)); do
+              printf "%s=%d " "${patches[$i]}" "$(( (n & (1 << i)) != 0 ))"
+            done | tee "tmp" ; echo
+            make clean
+            xargs make <"tmp"
+          done