diff --git a/liblog/include/log/log.h b/liblog/include/log/log.h
index 3813e6e..544b3a6 100644
--- a/liblog/include/log/log.h
+++ b/liblog/include/log/log.h
@@ -152,35 +152,12 @@
 
 #ifdef __linux__
 
-#ifndef __ANDROID_USE_LIBLOG_CLOCK_INTERFACE
-#ifndef __ANDROID_API__
-#define __ANDROID_USE_LIBLOG_CLOCK_INTERFACE 1
-#elif __ANDROID_API__ > 22 /* > Lollipop */
-#define __ANDROID_USE_LIBLOG_CLOCK_INTERFACE 1
-#else
-#define __ANDROID_USE_LIBLOG_CLOCK_INTERFACE 0
-#endif
-#endif
-
-#if __ANDROID_USE_LIBLOG_CLOCK_INTERFACE
 clockid_t android_log_clockid(void);
-#endif
 
 #endif /* __linux__ */
 
 /* --------------------------------------------------------------------- */
 
-#ifndef __ANDROID_USE_LIBLOG_CLOSE_INTERFACE
-#ifndef __ANDROID_API__
-#define __ANDROID_USE_LIBLOG_CLOSE_INTERFACE 1
-#elif __ANDROID_API__ > 18 /* > JellyBean */
-#define __ANDROID_USE_LIBLOG_CLOSE_INTERFACE 1
-#else
-#define __ANDROID_USE_LIBLOG_CLOSE_INTERFACE 0
-#endif
-#endif
-
-#if __ANDROID_USE_LIBLOG_CLOSE_INTERFACE
 /*
  * Release any logger resources (a new log write will immediately re-acquire)
  *
@@ -188,19 +165,6 @@
  * all O_CLOEXEC so wil self clean on exec().
  */
 void __android_log_close(void);
-#endif
-
-#ifndef __ANDROID_USE_LIBLOG_RATELIMIT_INTERFACE
-#ifndef __ANDROID_API__
-#define __ANDROID_USE_LIBLOG_RATELIMIT_INTERFACE 1
-#elif __ANDROID_API__ > 25 /* > OC */
-#define __ANDROID_USE_LIBLOG_RATELIMIT_INTERFACE 1
-#else
-#define __ANDROID_USE_LIBLOG_RATELIMIT_INTERFACE 0
-#endif
-#endif
-
-#if __ANDROID_USE_LIBLOG_RATELIMIT_INTERFACE
 
 /*
  * if last is NULL, caller _must_ provide a consistent value for seconds.
@@ -229,14 +193,6 @@
 #define IF_ALOG_RATELIMIT_LOCAL(seconds, state) \
   if (__android_log_ratelimit(seconds, state) > 0)
 
-#else
-
-/* No ratelimiting as API unsupported */
-#define IF_ALOG_RATELIMIT() if (1)
-#define IF_ALOG_RATELIMIT_LOCAL(...) if (1)
-
-#endif
-
 #if defined(__clang__)
 #pragma clang diagnostic pop
 #endif
diff --git a/liblog/include/log/log_event_list.h b/liblog/include/log/log_event_list.h
index 1b7c377..4dd3de3 100644
--- a/liblog/include/log/log_event_list.h
+++ b/liblog/include/log/log_event_list.h
@@ -32,18 +32,6 @@
 extern "C" {
 #endif
 
-#ifndef __ANDROID_USE_LIBLOG_EVENT_INTERFACE
-#ifndef __ANDROID_API__
-#define __ANDROID_USE_LIBLOG_EVENT_INTERFACE 1
-#elif __ANDROID_API__ > 23 /* > Marshmallow */
-#define __ANDROID_USE_LIBLOG_EVENT_INTERFACE 1
-#else
-#define __ANDROID_USE_LIBLOG_EVENT_INTERFACE 0
-#endif
-#endif
-
-#if __ANDROID_USE_LIBLOG_EVENT_INTERFACE
-
 /* For manipulating lists of events. */
 
 #define ANDROID_MAX_LIST_NEST_DEPTH 8
@@ -314,8 +302,6 @@
 #endif
 #endif
 
-#endif /* __ANDROID_USE_LIBLOG_EVENT_INTERFACE */
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/liblog/include/log/log_main.h b/liblog/include/log/log_main.h
index 53653de..a94a283 100644
--- a/liblog/include/log/log_main.h
+++ b/liblog/include/log/log_main.h
@@ -18,9 +18,10 @@
 #define _LIBS_LOG_LOG_MAIN_H
 
 #include <stdbool.h>
+#include <sys/cdefs.h>
+#include <sys/types.h>
 
 #include <android/log.h>
-#include <sys/cdefs.h>
 
 __BEGIN_DECLS
 
@@ -349,20 +350,6 @@
  *        over Android.
  */
 
-#ifndef __ANDROID_USE_LIBLOG_LOGGABLE_INTERFACE
-#ifndef __ANDROID_API__
-#define __ANDROID_USE_LIBLOG_LOGGABLE_INTERFACE 2
-#elif __ANDROID_API__ > 24 /* > Nougat */
-#define __ANDROID_USE_LIBLOG_LOGGABLE_INTERFACE 2
-#elif __ANDROID_API__ > 22 /* > Lollipop */
-#define __ANDROID_USE_LIBLOG_LOGGABLE_INTERFACE 1
-#else
-#define __ANDROID_USE_LIBLOG_LOGGABLE_INTERFACE 0
-#endif
-#endif
-
-#if __ANDROID_USE_LIBLOG_LOGGABLE_INTERFACE
-
 /*
  * Use the per-tag properties "log.tag.<tagname>" to generate a runtime
  * result of non-zero to expose a log. prio is ANDROID_LOG_VERBOSE to
@@ -370,12 +357,7 @@
  * any other value.
  */
 int __android_log_is_loggable(int prio, const char* tag, int default_prio);
-
-#if __ANDROID_USE_LIBLOG_LOGGABLE_INTERFACE > 1
-#include <sys/types.h>
-
-int __android_log_is_loggable_len(int prio, const char* tag, size_t len,
-                                  int default_prio);
+int __android_log_is_loggable_len(int prio, const char* tag, size_t len, int default_prio);
 
 #if LOG_NDEBUG /* Production */
 #define android_testLog(prio, tag)                                           \
@@ -387,24 +369,6 @@
                                  ANDROID_LOG_VERBOSE) != 0)
 #endif
 
-#else
-
-#if LOG_NDEBUG /* Production */
-#define android_testLog(prio, tag) \
-  (__android_log_is_loggable(prio, tag, ANDROID_LOG_DEBUG) != 0)
-#else
-#define android_testLog(prio, tag) \
-  (__android_log_is_loggable(prio, tag, ANDROID_LOG_VERBOSE) != 0)
-#endif
-
-#endif
-
-#else /* __ANDROID_USE_LIBLOG_LOGGABLE_INTERFACE */
-
-#define android_testLog(prio, tag) (1)
-
-#endif /* !__ANDROID_USE_LIBLOG_LOGGABLE_INTERFACE */
-
 #if defined(__clang__)
 #pragma clang diagnostic pop
 #endif
diff --git a/liblog/include/log/log_properties.h b/liblog/include/log/log_properties.h
index 7d398a6..94da242 100644
--- a/liblog/include/log/log_properties.h
+++ b/liblog/include/log/log_properties.h
@@ -14,19 +14,7 @@
 extern "C" {
 #endif
 
-#ifndef __ANDROID_USE_LIBLOG_IS_DEBUGGABLE_INTERFACE
-#ifndef __ANDROID_API__
-#define __ANDROID_USE_LIBLOG_IS_DEBUGGABLE_INTERFACE 1
-#elif __ANDROID_API__ > 24 /* > Nougat */
-#define __ANDROID_USE_LIBLOG_IS_DEBUGGABLE_INTERFACE 1
-#else
-#define __ANDROID_USE_LIBLOG_IS_DEBUGGABLE_INTERFACE 0
-#endif
-#endif
-
-#if __ANDROID_USE_LIBLOG_IS_DEBUGGABLE_INTERFACE
 int __android_log_is_debuggable();
-#endif
 
 #ifdef __cplusplus
 }
diff --git a/liblog/include/log/log_read.h b/liblog/include/log/log_read.h
index b03d677..d6de930 100644
--- a/liblog/include/log/log_read.h
+++ b/liblog/include/log/log_read.h
@@ -194,22 +194,6 @@
 };
 #endif
 
-#ifndef __ANDROID_USE_LIBLOG_READER_INTERFACE
-#ifndef __ANDROID_API__
-#define __ANDROID_USE_LIBLOG_READER_INTERFACE 3
-#elif __ANDROID_API__ > 23 /* > Marshmallow */
-#define __ANDROID_USE_LIBLOG_READER_INTERFACE 3
-#elif __ANDROID_API__ > 22 /* > Lollipop */
-#define __ANDROID_USE_LIBLOG_READER_INTERFACE 2
-#elif __ANDROID_API__ > 19 /* > KitKat */
-#define __ANDROID_USE_LIBLOG_READER_INTERFACE 1
-#else
-#define __ANDROID_USE_LIBLOG_READER_INTERFACE 0
-#endif
-#endif
-
-#if __ANDROID_USE_LIBLOG_READER_INTERFACE
-
 struct logger;
 
 log_id_t android_logger_get_id(struct logger* logger);
@@ -222,14 +206,12 @@
 
 struct logger_list;
 
-#if __ANDROID_USE_LIBLOG_READER_INTERFACE > 1
 ssize_t android_logger_get_statistics(struct logger_list* logger_list,
                                       char* buf, size_t len);
 ssize_t android_logger_get_prune_list(struct logger_list* logger_list,
                                       char* buf, size_t len);
 int android_logger_set_prune_list(struct logger_list* logger_list, char* buf,
                                   size_t len);
-#endif
 
 #define ANDROID_LOG_RDONLY O_RDONLY
 #define ANDROID_LOG_WRONLY O_WRONLY
@@ -240,13 +222,9 @@
 #else
 #define ANDROID_LOG_NONBLOCK O_NONBLOCK
 #endif
-#if __ANDROID_USE_LIBLOG_READER_INTERFACE > 2
 #define ANDROID_LOG_WRAP 0x40000000 /* Block until buffer about to wrap */
 #define ANDROID_LOG_WRAP_DEFAULT_TIMEOUT 7200 /* 2 hour default */
-#endif
-#if __ANDROID_USE_LIBLOG_READER_INTERFACE > 1
 #define ANDROID_LOG_PSTORE 0x80000000
-#endif
 
 struct logger_list* android_logger_list_alloc(int mode, unsigned int tail,
                                               pid_t pid);
@@ -265,8 +243,6 @@
                                              unsigned int tail, pid_t pid);
 #define android_logger_list_close android_logger_list_free
 
-#endif /* __ANDROID_USE_LIBLOG_READER_INTERFACE */
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/liblog/include/log/log_safetynet.h b/liblog/include/log/log_safetynet.h
index 07e8c8a..c8a5781 100644
--- a/liblog/include/log/log_safetynet.h
+++ b/liblog/include/log/log_safetynet.h
@@ -16,18 +16,6 @@
 extern "C" {
 #endif
 
-#ifndef _ANDROID_USE_LIBLOG_SAFETYNET_INTERFACE
-#ifndef __ANDROID_API__
-#define __ANDROID_USE_LIBLOG_SAFETYNET_INTERFACE 1
-#elif __ANDROID_API__ > 22 /* > Lollipop */
-#define __ANDROID_USE_LIBLOG_SAFETYNET_INTERFACE 1
-#else
-#define __ANDROID_USE_LIBLOG_SAFETYNET_INTERFACE 0
-#endif
-#endif
-
-#if __ANDROID_USE_LIBLOG_SAFETYNET_INTERFACE
-
 #define android_errorWriteLog(tag, subTag) \
   __android_log_error_write(tag, subTag, -1, NULL, 0)
 
@@ -37,8 +25,6 @@
 int __android_log_error_write(int tag, const char* subTag, int32_t uid,
                               const char* data, uint32_t dataLen);
 
-#endif /* __ANDROID_USE_LIBLOG_SAFETYNET_INTERFACE */
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/liblog/include_vndk/log/log_event_list.h b/liblog/include_vndk/log/log_event_list.h
index 9f74534..1f3dd37 100644
--- a/liblog/include_vndk/log/log_event_list.h
+++ b/liblog/include_vndk/log/log_event_list.h
@@ -27,8 +27,6 @@
 extern "C" {
 #endif
 
-#define __ANDROID_USE_LIBLOG_EVENT_INTERFACE 1
-
 /*
  * The opaque context used to manipulate lists of events.
  */