leveldb: update upstream verison 1.17 -> 1.18

ports/leveldb/nacl.patch

 diff --git a/Makefile b/Makefile
 --- a/Makefile
 +++ b/Makefile
-@@ -90,7 +90,11 @@ endif  # PLATFORM_SHARED_EXT
+@@ -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:
 diff --git a/build_detect_platform b/build_detect_platform
 --- a/build_detect_platform
 +++ b/build_detect_platform
-@@ -98,6 +98,22 @@ case "$TARGET_OS" in
+@@ -104,6 +104,31 @@ case "$TARGET_OS" in
          PLATFORM_LIBS="-lpthread"
          PORT_FILE=port/port_posix.cc
          ;;
 +    NaCl)
 +        PLATFORM=OS_NACL
 +        COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_NACL -DLEVELDB_PLATFORM_POSIX"
 +        PLATFORM_LDFLAGS="-pthread"
 +        PORT_FILE=port/port_posix.cc
 +        CROSS_COMPILE=true
-+        if [ "$NACL_ARCH" = arm -o "$NACL_ARCH" = pnacl ]; then
++        if [ "$TOOLCHAIN" = "pnacl" -o "$TOOLCHAIN" = "clang-newlib" ]; then
 +            COMMON_FLAGS="$COMMON_FLAGS -DLEVELDB_ATOMIC_PRESENT"
 +            # Would use -std=c++11 here but its broken on PNaCl:
 +            # http://crbug.com/314944
 +            PLATFORM_CXXFLAGS="-std=gnu++11"
 +        fi
++        if [ "$TOOLCHAIN" = "glibc" ]; then
++            if [ "$NACL_ARCH" = "arm" ]; then
++                COMMON_FLAGS="$COMMON_FLAGS -DLEVELDB_ATOMIC_PRESENT"
++                PLATFORM_CXXFLAGS="-std=c++11"
++            else
++                COMMON_FLAGS="$COMMON_FLAGS -D__STDC_LIMIT_MACROS"
++                PLATFORM_CXXFLAGS="-std=c++0x"
++             fi
++        fi
 +        if [ "$NACL_SHARED" != 1 ]; then
 +          PLATFORM_SHARED_EXT=""
 +        fi
 +        ;;
      NetBSD)
          PLATFORM=OS_NETBSD
          COMMON_FLAGS="$MEMCMP_FLAG -D_REENTRANT -DOS_NETBSD"
-diff --git a/port/atomic_pointer.h b/port/atomic_pointer.h
---- a/port/atomic_pointer.h
-+++ b/port/atomic_pointer.h
-@@ -20,6 +20,9 @@
- #define PORT_ATOMIC_POINTER_H_
- 
- #include <stdint.h>
-+#ifdef LEVELDB_ATOMIC_PRESENT
-+#include <atomic>
-+#endif
- #ifdef LEVELDB_CSTDATOMIC_PRESENT
- #include <cstdatomic>
- #endif
-@@ -125,8 +128,8 @@ class AtomicPointer {
-   }
- };
- 
--// AtomicPointer based on <cstdatomic>
--#elif defined(LEVELDB_CSTDATOMIC_PRESENT)
-+// AtomicPointer based on <cstdatomic> or <atomic>
-+#elif defined(LEVELDB_CSTDATOMIC_PRESENT) || defined(LEVELDB_ATOMIC_PRESENT)
- class AtomicPointer {
-  private:
-   std::atomic<void*> rep_;
 diff --git a/port/port_posix.h b/port/port_posix.h
 --- a/port/port_posix.h
 +++ b/port/port_posix.h
-@@ -37,6 +37,14 @@
+@@ -34,6 +34,14 @@
    // See http://code.google.com/p/android/issues/detail?id=39824
    #include <endian.h>
    #define PLATFORM_IS_LITTLE_ENDIAN  (_BYTE_ORDER == _LITTLE_ENDIAN)
 +#elif defined(OS_NACL)
 +  #include <sys/types.h>
 +  #if defined(_NEWLIB_VERSION)
 +    #include <machine/endian.h>
 +    #define PLATFORM_IS_LITTLE_ENDIAN  (BYTE_ORDER == LITTLE_ENDIAN)
 +  #else
 +    #include <endian.h>
 +  #endif
  #else
    #include <endian.h>
  #endif
-@@ -55,7 +63,7 @@
+@@ -52,7 +60,7 @@
  
  #if defined(OS_MACOSX) || defined(OS_SOLARIS) || defined(OS_FREEBSD) ||\
      defined(OS_NETBSD) || defined(OS_OPENBSD) || defined(OS_DRAGONFLYBSD) ||\
--    defined(OS_ANDROID) || defined(OS_HPUX)
-+    defined(OS_ANDROID) || defined(OS_HPUX) || (defined(OS_NACL) && (defined(_NEWLIB_VERSION) || defined(__BIONIC__)))
+-    defined(OS_ANDROID) || defined(OS_HPUX) || defined(CYGWIN)
++    defined(OS_ANDROID) || defined(OS_HPUX) || defined(CYGWIN) || (defined(OS_NACL) && (defined(_NEWLIB_VERSION) || defined(__BIONIC__)))
  // Use fread/fwrite/fflush on platforms without _unlocked variants
  #define fread_unlocked fread
  #define fwrite_unlocked fwrite
 diff --git a/util/env_posix.cc b/util/env_posix.cc
 --- a/util/env_posix.cc
 +++ b/util/env_posix.cc
-@@ -27,6 +27,32 @@
+@@ -24,6 +24,32 @@
  #include "util/mutexlock.h"
  #include "util/posix_logger.h"
  
 +#ifdef __native_client__
 +// TODO(sbc): remove once fsync/fdatasync get implemented in sel_ldr.
 +#define fsync(X) 0
 +#define fdatasync(X) 0
 +#ifdef __GLIBC__
 +#define geteuid(X) 0
 +ssize_t pread(int fd, char* buf, size_t n, off_t off) {
@@ skipping 12 matching lines @@
 +    return -1;
 +
 +  return num_read;
 +}
 +#endif
 +#endif
 +
  namespace leveldb {
  
  namespace {
-@@ -257,6 +283,9 @@ class PosixWritableFile : public WritableFile {
+@@ -254,6 +280,9 @@ class PosixWritableFile : public WritableFile {
  };
  
  static int LockOrUnlock(int fd, bool lock) {
 +#ifdef __native_client__
 +  return 0;
 +#else
    errno = 0;
    struct flock f;
    memset(&f, 0, sizeof(f));
-@@ -265,6 +294,7 @@ static int LockOrUnlock(int fd, bool lock) {
+@@ -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 {