fix calc when CUSTOM is undefined, remove PASSDOWN values

Removed the ${CAL_PASSDOWN}, ${HELP_PASSDOWN}, ${HELP_PASSDOWN},
${CSCRIPT_PASSDOWN} Makefile variables as the new Makefile
include files keep Makefile variables in sync.

Fixed the ability of calc to compile when CUSTOM is undefined
(i.e., -UCUSTOM).  The libcustcalc is always built, regardless
of the $(ALLOW_CUSTOM} Makefile variable.  However when CUSTOM
is undefined, the bulk of custom functions are not defined.

custom/Makefile

@@ -52,8 +52,7 @@ CONFIG_MKF= ../Makefile.config
 #
 TARGET_MKF= ../Makefile.target
 
-# Local file that is included just prior to the first rule,
-# that allows one to override any values set in this Makefile.
+# Host target information.
 #
 LOCAL_MKF= ../Makefile.local
 

custom/c_argv.c

@@ -25,21 +25,32 @@
  */
 
 
+/*
+ * ISO C requires a translation unit to contain at least one declaration,
+ * so we declare a global variable whose value is based on if CUSTOM is defined.
+ */
+#if defined(CUSTOM)
+int c_argv_allowed = 1;		/* CUSTOM defined */
+#else /* CUSTOM */
+int c_argv_allowed = 0;		/* CUSTOM defined */
+#endif /* CUSTOM */
+
+
 #if defined(CUSTOM)
 
 #include <stdio.h>
 
-#include "have_const.h"
-#include "value.h"
-#include "custom.h"
+#include "../have_const.h"
+#include "../value.h"
+#include "../custom.h"
 
-#include "config.h"
-#include "calc.h"
+#include "../config.h"
+#include "../calc.h"
 
-#include "have_unused.h"
+#include "../have_unused.h"
 
 
-#include "banned.h"	/* include after system header <> includes */
+#include "../banned.h"	/* include after system header <> includes */
 
 
 /*

custom/c_devnull.c

@@ -25,21 +25,32 @@
  */
 
 
+/*
+ * ISO C requires a translation unit to contain at least one declaration,
+ * so we declare a global variable whose value is based on if CUSTOM is defined.
+ */
+#if defined(CUSTOM)
+int c_devnull_allowed = 1;	/* CUSTOM defined */
+#else /* CUSTOM */
+int c_devnull_allowed = 0;	/* CUSTOM defined */
+#endif /* CUSTOM */
+
+
 #if defined(CUSTOM)
 
-#include "have_unistd.h"
+#include "../have_unistd.h"
 #if defined(HAVE_UNISTD_H)
 #include <unistd.h>
 #endif
 
-#include "have_const.h"
-#include "value.h"
-#include "custom.h"
+#include "../have_const.h"
+#include "../value.h"
+#include "../custom.h"
 
-#include "have_unused.h"
+#include "../have_unused.h"
 
 
-#include "banned.h"	/* include after system header <> includes */
+#include "../banned.h"	/* include after system header <> includes */
 
 
 /*

custom/c_help.c

@@ -25,22 +25,33 @@
  */
 
 
+/*
+ * ISO C requires a translation unit to contain at least one declaration,
+ * so we declare a global variable whose value is based on if CUSTOM is defined.
+ */
+#if defined(CUSTOM)
+int c_help_allowed = 1;		/* CUSTOM defined */
+#else /* CUSTOM */
+int c_help_allowed = 0;		/* CUSTOM defined */
+#endif /* CUSTOM */
+
+
 #if defined(CUSTOM)
 
-#include "have_unistd.h"
+#include "../have_unistd.h"
 #if defined(HAVE_UNISTD_H)
 #include <unistd.h>
 #endif
 
-#include "have_const.h"
-#include "value.h"
-#include "custom.h"
+#include "../have_const.h"
+#include "../value.h"
+#include "../custom.h"
 
-#include "have_unused.h"
+#include "../have_unused.h"
 
 
-#include "attribute.h"
-#include "banned.h"	/* include after system header <> includes */
+#include "../attribute.h"
+#include "../banned.h"	/* include after system header <> includes */
 
 
 /*

custom/c_pmodm127.c

@@ -24,20 +24,31 @@
  */
 
 
+/*
+ * ISO C requires a translation unit to contain at least one declaration,
+ * so we declare a global variable whose value is based on if CUSTOM is defined.
+ */
+#if defined(CUSTOM)
+int c_pmodm127_allowed = 1;	/* CUSTOM defined */
+#else /* CUSTOM */
+int c_pmodm127_allowed = 0;	/* CUSTOM defined */
+#endif /* CUSTOM */
+
+
 #if defined(CUSTOM)
 
 #include <stdio.h>
 
-#include "have_const.h"
-#include "value.h"
-#include "custom.h"
-#include "zmath.h"
+#include "../have_const.h"
+#include "../value.h"
+#include "../custom.h"
+#include "../zmath.h"
 
-#include "have_unused.h"
+#include "../have_unused.h"
 
 
-#include "attribute.h"
-#include "banned.h"	/* include after system header <> includes */
+#include "../attribute.h"
+#include "../banned.h"	/* include after system header <> includes */
 
 
 /* 2^255 */

custom/c_pzasusb8.c

@@ -24,20 +24,31 @@
  */
 
 
+/*
+ * ISO C requires a translation unit to contain at least one declaration,
+ * so we declare a global variable whose value is based on if CUSTOM is defined.
+ */
+#if defined(CUSTOM)
+int c_pzasusb8_allowed = 1;	/* CUSTOM defined */
+#else /* CUSTOM */
+int c_pzasusb8_allowed = 0;	/* CUSTOM defined */
+#endif /* CUSTOM */
+
+
 #if defined(CUSTOM)
 
 #include <stdio.h>
 
-#include "have_const.h"
-#include "value.h"
-#include "custom.h"
-#include "zmath.h"
+#include "../have_const.h"
+#include "../value.h"
+#include "../custom.h"
+#include "../zmath.h"
 
-#include "have_unused.h"
+#include "../have_unused.h"
 
 
-#include "attribute.h"
-#include "banned.h"	/* include after system header <> includes */
+#include "../attribute.h"
+#include "../banned.h"	/* include after system header <> includes */
 
 
 /*

custom/c_register.c

@@ -25,22 +25,33 @@
  */
 
 
+/*
+ * ISO C requires a translation unit to contain at least one declaration,
+ * so we declare a global variable whose value is based on if CUSTOM is defined.
+ */
+#if defined(CUSTOM)
+int c_register_allowed = 1;	/* CUSTOM defined */
+#else /* CUSTOM */
+int c_register_allowed = 0;	/* CUSTOM defined */
+#endif /* CUSTOM */
+
+
 #if defined(CUSTOM)
 
 #include <stdio.h>
 
-#include "have_const.h"
-#include "value.h"
-#include "custom.h"
+#include "../have_const.h"
+#include "../value.h"
+#include "../custom.h"
 
-#include "config.h"
-#include "calc.h"
+#include "../config.h"
+#include "../calc.h"
 
-#include "have_unused.h"
+#include "../have_unused.h"
 
 
-#include "attribute.h"
-#include "banned.h"	/* include after system header <> includes */
+#include "../attribute.h"
+#include "../banned.h"	/* include after system header <> includes */
 
 
 /*

custom/c_sysinfo.c

@@ -25,40 +25,51 @@
  */
 
 
+/*
+ * ISO C requires a translation unit to contain at least one declaration,
+ * so we declare a global variable whose value is based on if CUSTOM is defined.
+ */
+#if defined(CUSTOM)
+int c_sysinfo_allowed = 1;	/* CUSTOM defined */
+#else /* CUSTOM */
+int c_sysinfo_allowed = 0;	/* CUSTOM defined */
+#endif /* CUSTOM */
+
+
 #if defined(CUSTOM)
 
 #include <stdio.h>
 #include <ctype.h>
 
-#include "have_string.h"
+#include "../have_string.h"
 #if defined(HAVE_STRING_H)
 #include <string.h>
 #endif
 
-#include "have_const.h"
-#include "value.h"
-#include "custom.h"
+#include "../have_const.h"
+#include "../value.h"
+#include "../custom.h"
 
-#include "config.h"
-#include "lib_calc.h"
-#include "calc.h"
-#include "longbits.h"
+#include "../config.h"
+#include "../lib_calc.h"
+#include "../calc.h"
+#include "../longbits.h"
 #define CHECK_L_FORMAT
-#include "block.h"
-#include "calcerr.h"
-#include "conf.h"
-#include "endian_calc.h"
-#include "fposval.h"
-#include "hist.h"
-#include "prime.h"
-#include "zrand.h"
-#include "zrandom.h"
+#include "../block.h"
+#include "../calcerr.h"
+#include "../conf.h"
+#include "../endian_calc.h"
+#include "../fposval.h"
+#include "../hist.h"
+#include "../prime.h"
+#include "../zrand.h"
+#include "../zrandom.h"
 
-#include "have_unused.h"
+#include "../have_unused.h"
 
 
-#include "attribute.h"
-#include "banned.h"	/* include after system header <> includes */
+#include "../attribute.h"
+#include "../banned.h"	/* include after system header <> includes */
 
 
 /*

custom/custtbl.c

@@ -26,12 +26,12 @@
 
 #include <unistd.h>
 
-#include "have_const.h"
-#include "value.h"
-#include "custom.h"
+#include "../have_const.h"
+#include "../value.h"
+#include "../custom.h"
 
 
-#include "banned.h"	/* include after system header <> includes */
+#include "../banned.h"	/* include after system header <> includes */
 
 
 /*