diff --git a/libselinux/src/callbacks.c b/libselinux/src/callbacks.c
index c3cf98b..c18ccc5 100644
--- a/libselinux/src/callbacks.c
+++ b/libselinux/src/callbacks.c
@@ -34,7 +34,12 @@ default_selinux_audit(void *ptr __attribute__((unused)),
 static int
 default_selinux_validate(char **ctx)
 {
+#ifndef BUILD_HOST
 	return security_check_context(*ctx);
+#else
+	(void) ctx;
+	return 0;
+#endif
 }
 
 static int
diff --git a/libselinux/src/label_file.c b/libselinux/src/label_file.c
index 8ff1170..5ba6a22 100644
--- a/libselinux/src/label_file.c
+++ b/libselinux/src/label_file.c
@@ -543,6 +543,7 @@ static int init(struct selabel_handle *rec, const struct selinux_opt *opts,
 			break;
 		}
 
+#if !defined(BUILD_HOST) && !defined(ANDROID)
 	/* Process local and distribution substitution files */
 	if (!path) {
 		rec->dist_subs =
@@ -560,6 +561,7 @@ static int init(struct selabel_handle *rec, const struct selinux_opt *opts,
 							    rec->digest);
 	}
 
+#endif
 	rec->spec_file = strdup(path);
 
 	/*
diff --git a/libselinux/src/label_internal.h b/libselinux/src/label_internal.h
index 0827ef6..7c55531 100644
--- a/libselinux/src/label_internal.h
+++ b/libselinux/src/label_internal.h
@@ -16,6 +16,11 @@
 #include "dso.h"
 #include "sha1.h"
 
+#ifdef ANDROID
+// Android does not have fgets_unlocked()
+#define fgets_unlocked(buf, size, fp) fgets(buf, size, fp)
+#endif
+
 /*
  * Installed backends
  */
diff --git a/libselinux/src/load_policy.c b/libselinux/src/load_policy.c
index 4f39fc7..249f82f 100644
--- a/libselinux/src/load_policy.c
+++ b/libselinux/src/load_policy.c
@@ -11,8 +11,10 @@
 #include <string.h>
 #include <errno.h>
 #include "selinux_internal.h"
+#ifndef ANDROID
 #include <sepol/sepol.h>
 #include <sepol/policydb.h>
+#endif
 #include <dlfcn.h>
 #include "policy.h"
 #include <limits.h>
@@ -45,6 +47,7 @@ int security_load_policy(void *data, size_t len)
 
 hidden_def(security_load_policy)
 
+#ifndef ANDROID
 int load_setlocaldefs hidden = 1;
 
 #undef max
@@ -465,3 +468,4 @@ int selinux_init_load_policy(int *enforce)
 	 */
 	return -1;
 }
+#endif
diff --git a/libselinux/src/matchpathcon.c b/libselinux/src/matchpathcon.c
index 4764ab7..724eb65 100644
--- a/libselinux/src/matchpathcon.c
+++ b/libselinux/src/matchpathcon.c
@@ -7,6 +7,64 @@
 #include "callbacks.h"
 #include <limits.h>
 
+static int (*myinvalidcon) (const char *p, unsigned l, char *c) = NULL;
+static int (*mycanoncon) (const char *p, unsigned l, char **c) =  NULL;
+
+static void
+#ifdef __GNUC__
+    __attribute__ ((format(printf, 1, 2)))
+#endif
+    default_printf(const char *fmt, ...)
+{
+	va_list ap;
+	va_start(ap, fmt);
+	vfprintf(stderr, fmt, ap);
+	va_end(ap);
+}
+
+void
+#ifdef __GNUC__
+    __attribute__ ((format(printf, 1, 2)))
+#endif
+    (*myprintf) (const char *fmt,...) = &default_printf;
+int myprintf_compat = 0;
+
+void set_matchpathcon_printf(void (*f) (const char *fmt, ...))
+{
+	myprintf = f ? f : &default_printf;
+	myprintf_compat = 1;
+}
+
+int compat_validate(struct selabel_handle *rec,
+		    struct selabel_lookup_rec *contexts,
+		    const char *path, unsigned lineno)
+{
+	int rc;
+	char **ctx = &contexts->ctx_raw;
+
+	if (myinvalidcon)
+		rc = myinvalidcon(path, lineno, *ctx);
+	else if (mycanoncon)
+		rc = mycanoncon(path, lineno, ctx);
+	else {
+		rc = selabel_validate(rec, contexts);
+		if (rc < 0) {
+			if (lineno) {
+				COMPAT_LOG(SELINUX_WARNING,
+					    "%s: line %u has invalid context %s\n",
+						path, lineno, *ctx);
+			} else {
+				COMPAT_LOG(SELINUX_WARNING,
+					    "%s: has invalid context %s\n", path, *ctx);
+			}
+		}
+	}
+
+	return rc ? -1 : 0;
+}
+
+#ifndef BUILD_HOST
+
 static __thread struct selabel_handle *hnd;
 
 /*
@@ -54,33 +112,6 @@ static void free_array_elts(void)
 	con_array = NULL;
 }
 
-static void
-#ifdef __GNUC__
-    __attribute__ ((format(printf, 1, 2)))
-#endif
-    default_printf(const char *fmt, ...)
-{
-	va_list ap;
-	va_start(ap, fmt);
-	vfprintf(stderr, fmt, ap);
-	va_end(ap);
-}
-
-void
-#ifdef __GNUC__
-    __attribute__ ((format(printf, 1, 2)))
-#endif
-    (*myprintf) (const char *fmt,...) = &default_printf;
-int myprintf_compat = 0;
-
-void set_matchpathcon_printf(void (*f) (const char *fmt, ...))
-{
-	myprintf = f ? f : &default_printf;
-	myprintf_compat = 1;
-}
-
-static int (*myinvalidcon) (const char *p, unsigned l, char *c) = NULL;
-
 void set_matchpathcon_invalidcon(int (*f) (const char *p, unsigned l, char *c))
 {
 	myinvalidcon = f;
@@ -104,9 +135,6 @@ static int default_canoncon(const char *path, unsigned lineno, char **context)
 	return 0;
 }
 
-static int (*mycanoncon) (const char *p, unsigned l, char **c) =
-    NULL;
-
 void set_matchpathcon_canoncon(int (*f) (const char *p, unsigned l, char **c))
 {
 	if (f)
@@ -536,30 +564,4 @@ int selinux_lsetfilecon_default(const char *path)
 	return rc;
 }
 
-int compat_validate(struct selabel_handle *rec,
-		    struct selabel_lookup_rec *contexts,
-		    const char *path, unsigned lineno)
-{
-	int rc;
-	char **ctx = &contexts->ctx_raw;
-
-	if (myinvalidcon)
-		rc = myinvalidcon(path, lineno, *ctx);
-	else if (mycanoncon)
-		rc = mycanoncon(path, lineno, ctx);
-	else {
-		rc = selabel_validate(rec, contexts);
-		if (rc < 0) {
-			if (lineno) {
-				COMPAT_LOG(SELINUX_WARNING,
-					    "%s: line %u has invalid context %s\n",
-						path, lineno, *ctx);
-			} else {
-				COMPAT_LOG(SELINUX_WARNING,
-					    "%s: has invalid context %s\n", path, *ctx);
-			}
-		}
-	}
-
-	return rc ? -1 : 0;
-}
+#endif
diff --git a/libselinux/src/procattr.c b/libselinux/src/procattr.c
index eee4612..7efcd7e 100644
--- a/libselinux/src/procattr.c
+++ b/libselinux/src/procattr.c
@@ -22,10 +22,13 @@ static pthread_key_t destructor_key;
 static int destructor_key_initialized = 0;
 static __thread char destructor_initialized;
 
+#ifndef ANDROID
+/* Android declares this in unistd.h and has a definition for it */
 static pid_t gettid(void)
 {
 	return syscall(__NR_gettid);
 }
+#endif
 
 static void procattr_thread_destructor(void __attribute__((unused)) *unused)
 {
