diff --git a/configure b/configure
index 03d21562fa..28df15ea20 100755
--- a/configure
+++ b/configure
@@ -1199,6 +1199,7 @@ THREADS_LIST='
 '
 
 ARCH_LIST='
+    aarch64
     alpha
     arm
     avr32
@@ -2738,6 +2739,9 @@ fi
 
 # Deal with common $arch aliases
 case "$arch" in
+    aarch64|arm64)
+        arch="aarch64"
+    ;;
     arm*|iPad*)
         arch="arm"
     ;;
@@ -2935,6 +2939,17 @@ elif enabled avr32; then
         ;;
     esac
 
+elif enabled aarch64; then
+
+    case $cpu in
+        armv*)
+            cpuflags="-march=$cpu"
+        ;;
+        *)
+            cpuflags="-mcpu=$cpu"
+        ;;
+    esac
+
 fi
 
 add_cflags $cpuflags
@@ -3148,7 +3163,6 @@ case $target_os in
         SHFLAGS='-shared -Wl,--out-implib,$(SUBDIR)lib$(FULLNAME).dll.a'
         objformat="win32"
         enable dos_paths
-        add_cppflags -U__STRICT_ANSI__
         ;;
     *-dos|freedos|opendos)
         network_extralibs="-lsocket"
@@ -3157,7 +3171,6 @@ case $target_os in
         add_cppflags -U__STRICT_ANSI__
         ;;
     linux)
-        add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
         enable dv1394
         ;;
     irix*)
@@ -3190,10 +3203,9 @@ case $target_os in
         enable_weak os2threads
         ;;
     gnu/kfreebsd)
-        add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600 -D_BSD_SOURCE
+        add_cppflags -D_BSD_SOURCE
         ;;
     gnu)
-        add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
         ;;
     qnx)
         add_cppflags -D_QNX_SOURCE
@@ -3241,8 +3253,10 @@ esac
 
 if check_cpp_condition features.h "defined __UCLIBC__"; then
     libc_type=uclibc
+    add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
 elif check_cpp_condition features.h "defined __GLIBC__"; then
     libc_type=glibc
+    add_cppflags -D_POSIX_C_SOURCE=200112 -D_XOPEN_SOURCE=600
 elif check_header _mingw.h; then
     libc_type=mingw
     check_cpp_condition _mingw.h \
@@ -3256,6 +3270,7 @@ elif check_header _mingw.h; then
     fi
 elif check_cpp_condition newlib.h "defined _NEWLIB_VERSION"; then
     libc_type=newlib
+    add_cppflags -U__STRICT_ANSI__
 elif check_func_headers stdlib.h _get_doserrno; then
     libc_type=msvcrt
     add_compat strtod.o strtod=avpriv_strtod
diff --git a/libavcodec/pgssubdec.c b/libavcodec/pgssubdec.c
index a303c08b80..b183f30616 100644
--- a/libavcodec/pgssubdec.c
+++ b/libavcodec/pgssubdec.c
@@ -52,6 +52,7 @@ typedef struct PGSSubPresentation {
     int                    id_number;
     int                    object_count;
     PGSSubPictureReference *objects;
+    int64_t pts;
 } PGSSubPresentation;
 
 typedef struct PGSSubPicture {
@@ -67,7 +68,6 @@ typedef struct PGSSubContext {
     PGSSubPresentation presentation;
     uint32_t           clut[256];
     PGSSubPicture      pictures[UINT16_MAX];
-    int64_t            pts;
     int forced_subs_only;
 } PGSSubContext;
 
@@ -295,7 +295,8 @@ static void parse_palette_segment(AVCodecContext *avctx,
  * @todo TODO: Implement cropping
  */
 static void parse_presentation_segment(AVCodecContext *avctx,
-                                       const uint8_t *buf, int buf_size)
+                                       const uint8_t *buf, int buf_size,
+                                       int64_t pts)
 {
     PGSSubContext *ctx = avctx->priv_data;
 
@@ -304,6 +305,8 @@ static void parse_presentation_segment(AVCodecContext *avctx,
 
     uint16_t object_index;
 
+    ctx->presentation.pts = pts;
+
     av_dlog(avctx, "Video Dimensions %dx%d\n",
             w, h);
     if (av_image_check_size(w, h, 0, avctx) >= 0)
@@ -394,10 +397,10 @@ static int display_end_segment(AVCodecContext *avctx, void *data,
      *      not been cleared by a subsequent empty display command.
      */
 
-    pts = ctx->pts != AV_NOPTS_VALUE ? ctx->pts : sub->pts;
+    pts = ctx->presentation.pts != AV_NOPTS_VALUE ? ctx->presentation.pts : sub->pts;
     memset(sub, 0, sizeof(*sub));
     sub->pts = pts;
-    ctx->pts = AV_NOPTS_VALUE;
+    ctx->presentation.pts = AV_NOPTS_VALUE;
 
     // Blank if last object_count was 0.
     if (!ctx->presentation.object_count)
@@ -493,8 +496,7 @@ static int decode(AVCodecContext *avctx, void *data, int *data_size,
             parse_picture_segment(avctx, buf, segment_length);
             break;
         case PRESENTATION_SEGMENT:
-            parse_presentation_segment(avctx, buf, segment_length);
-            ctx->pts = sub->pts;
+            parse_presentation_segment(avctx, buf, segment_length, sub->pts);
             break;
         case WINDOW_SEGMENT:
             /*