diff -ruwN source/src/configure.ac source-new/src/configure.ac
--- source/src/configure.ac	2024-10-29 04:05:26.000000000 +0700
+++ source-new/src/configure.ac	2025-08-06 03:15:52.796303989 +0700
@@ -3759,7 +3759,7 @@
 dnl Check for functions in one big call, to reduce the size of configure.
 dnl Can only be used for functions that do not require any include.
 AC_CHECK_FUNCS(fchdir fchown fchmod fsync getcwd getpseudotty \
-	getpwent getpwnam getpwuid getrlimit gettimeofday localtime_r lstat \
+	getpwent getpwnam getpwuid gettimeofday localtime_r lstat \
 	memset mkdtemp nanosleep opendir putenv qsort readlink select setenv \
 	getpgid setpgid setsid sigaltstack sigstack sigset sigsetjmp sigaction \
 	sigprocmask sigvec strcasecmp strcoll strerror strftime stricmp strncasecmp \
diff -ruwN source/src/feature.h source-new/src/feature.h
--- source/src/feature.h	2024-10-29 04:05:26.000000000 +0700
+++ source-new/src/feature.h	2025-08-06 03:16:27.596296730 +0700
@@ -272,6 +272,7 @@
  */
 #if defined(FEAT_NORMAL) \
 	&& defined(FEAT_EVAL) \
+	&& !defined (__redox__)  /* disable setitimer */ \
 	&& ((defined(HAVE_GETTIMEOFDAY) && defined(HAVE_SYS_TIME_H) \
 		&& (!defined(MACOS_X) || defined(HAVE_DISPATCH_DISPATCH_H))) \
 	    || defined(MSWIN))
diff -ruwN source/src/libvterm/include/vterm.h source-new/src/libvterm/include/vterm.h
--- source/src/libvterm/include/vterm.h	2024-10-29 04:05:26.000000000 +0700
+++ source-new/src/libvterm/include/vterm.h	2025-08-06 03:15:02.506316769 +0700
@@ -17,9 +17,11 @@
 #define FALSE 0
 
 // VIM: from stdint.h
+#if !defined (__redox__)
 typedef unsigned char		uint8_t;
 typedef unsigned short		uint16_t;
 typedef unsigned int		uint32_t;
+#endif
 
 // VIM: define max screen cols and rows
 #define VTERM_MAX_COLS 1000
diff -ruwN source/src/memfile.c source-new/src/memfile.c
--- source/src/memfile.c	2024-10-29 04:05:26.000000000 +0700
+++ source-new/src/memfile.c	2025-08-06 03:15:36.896308173 +0700
@@ -599,6 +599,8 @@
 	    // No sync() on Stratus VOS
 # if defined(__OPENNT) || defined(__TANDEM) || defined(__VOS__)
 	    fflush(NULL);
+# elif defined(__redox__)
+        fsync(mfp->mf_fd);
 # else
 	    sync();
 # endif
diff -ruwN source/src/auto/configure source-new/src/auto/configure
--- source/src/auto/configure	2024-10-29 04:05:26.000000000 +0700
+++ source-new/src/auto/configure	2025-08-06 03:56:11.765660165 +0700
@@ -13358,12 +13358,6 @@
   printf "%s\n" "#define HAVE_GETPWUID 1" >>confdefs.h
 
 fi
-ac_fn_c_check_func "$LINENO" "getrlimit" "ac_cv_func_getrlimit"
-if test "x$ac_cv_func_getrlimit" = xyes
-then :
-  printf "%s\n" "#define HAVE_GETRLIMIT 1" >>confdefs.h
-
-fi
 ac_fn_c_check_func "$LINENO" "gettimeofday" "ac_cv_func_gettimeofday"
 if test "x$ac_cv_func_gettimeofday" = xyes
 then :