diff --git a/interpreters/bas/Kconfig b/interpreters/bas/Kconfig
index d47444151..90a8b1211 100644
--- a/interpreters/bas/Kconfig
+++ b/interpreters/bas/Kconfig
@@ -31,4 +31,33 @@ config INTERPRETERS_BAS
 		- Set CONFIG_LIBM=y in your .config file
 
 if INTERPRETERS_BAS
+
+config INTERPRETER_BAS_HAVE_ENVIRON
+	bool
+	default n
+	depends on EXPERIMENTAL
+	---help---
+		NuttX does not support the environ variable
+
+config INTERPRETER_BAS_HAVE_SYSCFG
+	bool
+	default n
+	depends on EXPERIMENTAL
+	---help---
+		NuttX does not support the syscfg() function
+
+config INTERPRETER_BAS_HAVE_SIGINT
+	bool
+	default n
+	depends on EXPERIMENTAL
+	---help---
+		NuttX does not support the SIGINT signal
+
+config INTERPRETER_BAS_HAVE_SIGQUIT
+	bool
+	default n
+	depends on EXPERIMENTAL
+	---help---
+		NuttX does not support the SIGQUIT signal
+
 endif
diff --git a/interpreters/bas/fs.c b/interpreters/bas/fs.c
index 1e933d441..4a762a0d1 100644
--- a/interpreters/bas/fs.c
+++ b/interpreters/bas/fs.c
@@ -1,5 +1,6 @@
 /* BASIC file system interface. */
 /* #includes */ /*{{{C}}}*//*{{{*/
+#include <nuttx/config.h>
 #include "config.h"
 
 #include <sys/time.h>
@@ -45,7 +46,12 @@ static int capacity;
 static int used;
 static struct termios origMode,rawMode;
 static const int open_mode[4]={ 0, O_RDONLY, O_WRONLY, O_RDWR };
-static struct sigaction old_sigint, old_sigquit;
+#ifdef CONFIG_INTERPRETER_BAS_HAVE_SIGINT
+static struct sigaction old_sigint;
+#endif
+#ifdef CONFIG_INTERPRETER_BAS_HAVE_SIGQUIT
+static struct sigaction old_sigquit;
+#endif
 static int termchannel;
 
 const char *FS_errmsg;
@@ -381,12 +387,14 @@ static void carriage_return(int chn) /*{{{*/
 }
 /*}}}*/
 #endif
+#ifdef CONFIG_INTERPRETER_BAS_HAVE_SIGINT
 static void sigintr(int sig) /*{{{*/
 {
   FS_intr=1;
   FS_allowIntr(0);
 }
 /*}}}*/
+#endif
 
 int FS_opendev(int chn, int infd, int outfd) /*{{{*/
 {
@@ -782,21 +790,33 @@ int FS_truncate(int chn) /*{{{*/
 /*}}}*/
 void FS_shellmode(int dev) /*{{{*/
 {
+#if defined(CONFIG_INTERPRETER_BAS_HAVE_SIGINT) || defined(CONFIG_INTERPRETER_BAS_HAVE_SIGQUIT)
   struct sigaction interrupt;
+#endif
 
   if (file[dev]->tty) tcsetattr(file[dev]->infd,TCSADRAIN,&origMode);
+#if defined(CONFIG_INTERPRETER_BAS_HAVE_SIGINT) || defined(CONFIG_INTERPRETER_BAS_HAVE_SIGQUIT)
   interrupt.sa_flags=0;
   sigemptyset(&interrupt.sa_mask);
   interrupt.sa_handler=SIG_IGN;
+#ifdef CONFIG_INTERPRETER_BAS_HAVE_SIGINT
   sigaction(SIGINT,&interrupt,&old_sigint);
+#endif
+#ifdef CONFIG_INTERPRETER_BAS_HAVE_SIGQUIT
   sigaction(SIGQUIT,&interrupt,&old_sigquit);
+#endif
+#endif
 }
 /*}}}*/
 void FS_fsmode(int chn) /*{{{*/
 {
   if (file[chn]->tty) tcsetattr(file[chn]->infd,TCSADRAIN,&rawMode);
+#ifdef CONFIG_INTERPRETER_BAS_HAVE_SIGINT
   sigaction(SIGINT,&old_sigint,(struct sigaction *)0);
+#endif
+#ifdef CONFIG_INTERPRETER_BAS_HAVE_SIGQUIT
   sigaction(SIGQUIT,&old_sigquit,(struct sigaction *)0);
+#endif
 }
 /*}}}*/
 void FS_xonxoff(int chn, int on) /*{{{*/
@@ -1421,6 +1441,7 @@ int FS_memOutput(int address, int value) /*{{{*/
 /*}}}*/
 void FS_allowIntr(int on) /*{{{*/
 {
+#ifdef CONFIG_INTERPRETER_BAS_HAVE_SIGINT
   struct sigaction breakact;
 
   breakact.sa_handler=on ? sigintr : SIG_IGN;
@@ -1428,5 +1449,6 @@ void FS_allowIntr(int on) /*{{{*/
   sigaddset(&breakact.sa_mask,SIGINT);
   breakact.sa_flags=0;
   sigaction(SIGINT,&breakact,(struct sigaction *)0);
+#endif
 }
 /*}}}*/
diff --git a/interpreters/bas/global.c b/interpreters/bas/global.c
index 8206b5f94..243b7c1eb 100644
--- a/interpreters/bas/global.c
+++ b/interpreters/bas/global.c
@@ -1,5 +1,6 @@
 /* Global variables and functions. */
 /* #includes */ /*{{{C}}}*//*{{{*/
+#include <nuttx/config.h>
 #include "config.h"
 
 #include <sys/times.h>
@@ -38,7 +39,13 @@
 #endif
 /*}}}*/
 
+#ifndef CONFIG_INTERPRETER_BAS_HAVE_ENVIRON
 extern char **environ;
+#endif
+
+#ifndef RAND_MAX
+#  define RAND_MAX 32767
+#endif
 
 static int wildcardmatch(const char *a, const char *pattern) /*{{{*/
 {
@@ -1337,7 +1344,11 @@ static struct Value *fn_tan(struct Value *v, struct Auto *stack) /*{{{*/
 /*}}}*/
 static struct Value *fn_timei(struct Value *v, struct Auto *stack) /*{{{*/
 {
+#ifdef CONFIG_INTERPRETER_BAS_HAVE_SYSCFG
   return Value_new_INTEGER(v,(unsigned long)(times((struct tms*)0)/(sysconf(_SC_CLK_TCK)/100.0)));
+#else
+  return Value_new_INTEGER(v,(unsigned long)(times((struct tms*)0)/(CLK_TCK/100.0)));
+#endif
 }
 /*}}}*/
 static struct Value *fn_times(struct Value *v, struct Auto *stack) /*{{{*/
diff --git a/interpreters/bas/statement.c b/interpreters/bas/statement.c
index 490e76a98..9e324b885 100644
--- a/interpreters/bas/statement.c
+++ b/interpreters/bas/statement.c
@@ -1,4 +1,5 @@
 /* #includes */ /*{{{C}}}*//*{{{*/
+#include <unistd.h>
 #include "config.h"
 
 #include <unistd.h>
@@ -571,7 +572,7 @@ struct Value *stmt_DISPLAY(struct Value *value) /*{{{*/
   if (eval(value,_("file name"))->type==V_ERROR || (pass!=DECLARE && Value_retype(value,V_STRING)->type==V_ERROR)) return value;
   if (pass==INTERPRET && cat(value->u.string.character)==-1)
   {
-    char *msg=strerror(errno);
+    const char *msg=strerror(errno);
 
     Value_destroy(value);
     pc=statementpc;
@@ -1356,7 +1357,7 @@ struct Value *stmt_KILL(struct Value *value) /*{{{*/
   if (eval(value,_("file name"))->type==V_ERROR || (pass!=DECLARE && Value_retype(value,V_STRING)->type==V_ERROR)) return value;
   if (pass==INTERPRET && unlink(value->u.string.character)==-1)
   {
-    char *msg=strerror(errno);
+    const char *msg=strerror(errno);
 
     Value_destroy(value);
     pc=statementpc;