Windows cache: static link winpthreads to avoid nanosleep64 ABI mismatch

Author: pepc84

.github/workflows/build-cache.yml

@@ -28,7 +28,7 @@ jobs:
         run: |
           mkdir -p cache/linux-x64
           CFLAGS="-std=c++2c -O2 -march=x86-64"
-          LFLAGS="-static-libgcc -static-libstdc++"
+          LFLAGS="-static-libgcc -static-libstdc++ -Wl,-Bstatic -lpthread -Wl,-Bdynamic"
           DEFS="-DPROCESSING_HAS_STB_IMAGE -DPROCESSING_HAS_STB_TRUETYPE"
           INC="-I src"
 
@@ -65,7 +65,7 @@ jobs:
         run: |
           mkdir -p cache/windows-x64
           CFLAGS="-std=c++2c -O2 -march=x86-64"
-          LFLAGS="-static-libgcc -static-libstdc++"
+          LFLAGS="-static-libgcc -static-libstdc++ -Wl,-Bstatic -lpthread -Wl,-Bdynamic"
           DEFS="-DPROCESSING_HAS_STB_IMAGE -DPROCESSING_HAS_STB_TRUETYPE"
           INC="-I src"