tv: remove sysinfo() usage

This call was used limited the buffer size if installed RAM was below 16
MB. This stopped being useful a decade ago. The check could also
overflow on 32 bit systems. Just get rid of it.

old-configure

@@ -545,9 +545,6 @@ check_statement_libs "shm" $_shm SHM "sys/types.h sys/ipc.h sys/shm.h" \
 
 check_trivial "audio select()" $_select AUDIO_SELECT
 
-check_statement_libs "sys/sysinfo.h" auto SYS_SYSINFO_H \
-    sys/sysinfo.h 'struct sysinfo s_info; s_info.mem_unit=0; sysinfo(&s_info)'
-
 echocheck "pkg-config"
 if $($_pkg_config --version > /dev/null 2>&1); then
   if test "$_ld_static"; then

stream/tvi_v4l2.c

@@ -46,9 +46,6 @@ known issues:
 #include <sys/types.h>
 #include <unistd.h>
 #include <math.h>
-#if HAVE_SYS_SYSINFO_H
-#include <sys/sysinfo.h>
-#endif
 #if HAVE_SYS_VIDEOIO_H
 #include <sys/videoio.h>
 #else
@@ -1230,13 +1227,6 @@ static int get_capture_buffer_size(priv_t *priv)
     if (priv->tv_param->buffer_size >= 0) {
         bufsize = priv->tv_param->buffer_size*1024*1024;
     } else {
-#if HAVE_SYS_SYSINFO_H
-        struct sysinfo si;
-
-        sysinfo(&si);
-        bufsize = (si.freeram/2)*si.mem_unit;
-        if ( bufsize < 16*1024*1024)
-#endif
         bufsize = 16*1024*1024;
     }
 

wscript

@@ -208,11 +208,6 @@ iconv support use --disable-iconv.",
         'deps': [ 'os-linux' ],
         'func': check_statement('sys/vfs.h',
                                 'struct statfs fs; fstatfs(0, &fs); fs.f_namelen')
-    }, {
-        'name': 'sys-sysinfo-h',
-        'desc': 'sys/sysinfo.h',
-        'func': check_statement('sys/sysinfo.h',
-            'struct sysinfo s_info; s_info.mem_unit=0; sysinfo(&s_info)')
     }, {
         'name': '--libguess',
         'desc': 'libguess support',