Fix ports to pass generic options which work with new and old drivers

ports/leveldb/nacl.patch

 diff --git a/Makefile b/Makefile
 --- a/Makefile
 +++ b/Makefile
 @@ -99,7 +99,11 @@ endif  # PLATFORM_SHARED_EXT
  
  all: $(SHARED) $(LIBRARY)
  
 -check: all $(PROGRAMS) $(TESTS)
 +tests: $(TESTS)
 +
 +programs: $(PROGRAMS)
 +
 +check: all programs tests
         for t in $(TESTS); do echo "***** Running $$t"; ./$$t || exit 1; done
  
  clean:
+@@ -108,7 +112,7 @@ clean:
+ 
+ $(LIBRARY): $(LIBOBJECTS)
+        rm -f $@
+-       $(AR) -rs $@ $(LIBOBJECTS)
++       $(AR) rs $@ $(LIBOBJECTS)
+ 
+ db_bench: db/db_bench.o $(LIBOBJECTS) $(TESTUTIL)
+        $(CXX) $(LDFLAGS) db/db_bench.o $(LIBOBJECTS) $(TESTUTIL) -o $@ $(LIBS)
+@@ -190,7 +194,7 @@ write_batch_test: db/write_batch_test.o $(LIBOBJECTS) $(TESTHARNESS)
+ 
+ $(MEMENVLIBRARY) : $(MEMENVOBJECTS)
+        rm -f $@
+-       $(AR) -rs $@ $(MEMENVOBJECTS)
++       $(AR) rs $@ $(MEMENVOBJECTS)
+ 
+ memenv_test : helpers/memenv/memenv_test.o $(MEMENVLIBRARY) $(LIBRARY) $(TESTHARNESS)
+        $(CXX) $(LDFLAGS) helpers/memenv/memenv_test.o $(MEMENVLIBRARY) $(LIBRARY) $(TESTHARNESS) -o $@ $(LIBS)
 diff --git a/build_detect_platform b/build_detect_platform
 --- a/build_detect_platform
 +++ b/build_detect_platform
 @@ -104,6 +104,31 @@ case "$TARGET_OS" in
          PLATFORM_LIBS="-lpthread"
          PORT_FILE=port/port_posix.cc
          ;;
 +    NaCl)
 +        PLATFORM=OS_NACL
 +        COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_NACL -DLEVELDB_PLATFORM_POSIX"
@@ skipping 96 matching lines @@
    struct flock f;
    memset(&f, 0, sizeof(f));
 @@ -262,6 +291,7 @@ static int LockOrUnlock(int fd, bool lock) {
    f.l_start = 0;
    f.l_len = 0;        // Lock/unlock entire file
    return fcntl(fd, F_SETLK, &f);
 +#endif
  }
  
  class PosixFileLock : public FileLock {