Remove unused POSIX_MMAP references

Change-Id: I6998e15f9ed2849a270033217c02e27c79ee8343

configure

@@ -261,7 +261,6 @@ HAVE_LIST="
     ${ARCH_EXT_LIST}
     vpx_ports
     pthread_h
-    sys_mman_h
     unistd_h
 "
 EXPERIMENT_LIST="
@@ -550,7 +549,6 @@ process_detect() {
                 *)
                     case $header in
                         pthread.h) true;;
-                        sys/mman.h) true;;
                         unistd.h) true;;
                         *) false;;
                     esac && enable_feature $var
@@ -567,7 +565,6 @@ int main(void) {return 0;}
 EOF
     # check system headers
     check_header pthread.h
-    check_header sys/mman.h
     check_header unistd.h # for sysconf(3) and friends.
 
     check_header vpx/vpx_integer.h -I${source_path} && enable_feature vpx_ports

examples/vp8_multi_resolution_encoder.c

@@ -29,13 +29,6 @@
 #include <math.h>
 #include <assert.h>
 #include <sys/time.h>
-#if USE_POSIX_MMAP
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <fcntl.h>
-#include <unistd.h>
-#endif
 #include "vpx_ports/vpx_timer.h"
 #include "vpx/vpx_encoder.h"
 #include "vpx/vp8cx.h"

vpxstats.c

@@ -26,17 +26,6 @@ int stats_open_file(stats_io_t *stats, const char *fpf, int pass) {
     stats->buf.buf = NULL;
     res = (stats->file != NULL);
   } else {
-#if USE_POSIX_MMAP
-    struct stat stat_buf;
-    int fd;
-
-    fd = open(fpf, O_RDONLY);
-    stats->file = fdopen(fd, "rb");
-    fstat(fd, &stat_buf);
-    stats->buf.sz = stat_buf.st_size;
-    stats->buf.buf = mmap(NULL, stats->buf.sz, PROT_READ, MAP_PRIVATE, fd, 0);
-    res = (stats->buf.buf != NULL);
-#else
     size_t nbytes;
 
     stats->file = fopen(fpf, "rb");
@@ -58,7 +47,6 @@ int stats_open_file(stats_io_t *stats, const char *fpf, int pass) {
 
     nbytes = fread(stats->buf.buf, 1, stats->buf.sz, stats->file);
     res = (nbytes == stats->buf.sz);
-#endif  /* USE_POSIX_MMAP */
   }
 
   return res;
@@ -82,11 +70,7 @@ int stats_open_mem(stats_io_t *stats, int pass) {
 void stats_close(stats_io_t *stats, int last_pass) {
   if (stats->file) {
     if (stats->pass == last_pass) {
-#if USE_POSIX_MMAP
-      munmap(stats->buf.buf, stats->buf.sz);
-#else
       free(stats->buf.buf);
-#endif  /* USE_POSIX_MMAP */
     }
 
     fclose(stats->file);