Add --help documentation for ARM specific command line switches

From-SVN: r23130

gcc/ChangeLog

+Fri Oct 16 10:47:53 1998  Nick Clifton  <nickc@cygnus.com>
+
+	* config/arm/arm.h (TARGET_SWITCHES): Add --help documentation.
+	(TARGET_OPTIONS): Add --help documentation.
+
 Fri Oct 16 11:49:01 1998  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* rtl.h (sets_cc0_p): Revert Oct 14 ATTRIBUTE_NORETURN change.

gcc/config/arm/arm.h

@@ -332,42 +332,42 @@ extern char *target_fp_name;
 #define TARGET_SWITCHES  				\
 {                         				\
   {"apcs",			ARM_FLAG_APCS_FRAME},	\
-  {"apcs-frame",		ARM_FLAG_APCS_FRAME},	\
+  {"apcs-frame",		ARM_FLAG_APCS_FRAME, "Generate APCS conformant stack frames" },	\
   {"no-apcs-frame",	       -ARM_FLAG_APCS_FRAME},	\
   {"poke-function-name",	ARM_FLAG_POKE},		\
   {"fpe",			ARM_FLAG_FPE},		\
   {"6",				ARM_FLAG_ARM6},		\
   {"2",				ARM_FLAG_ARM3},		\
   {"3",				ARM_FLAG_ARM3},		\
-  {"apcs-32",			ARM_FLAG_APCS_32},	\
-  {"apcs-26",		       -ARM_FLAG_APCS_32},	\
+  {"apcs-32",			ARM_FLAG_APCS_32, "Use the 32bit version of the APCS" },	\
+  {"apcs-26",		       -ARM_FLAG_APCS_32, "Use the 26bit version of the APCS" },	\
   {"apcs-stack-check",		ARM_FLAG_APCS_STACK},	\
   {"no-apcs-stack-check",      -ARM_FLAG_APCS_STACK},	\
-  {"apcs-float",		ARM_FLAG_APCS_FLOAT},	\
+  {"apcs-float",		ARM_FLAG_APCS_FLOAT, "Pass FP arguments in FP registers" },	\
   {"no-apcs-float",	       -ARM_FLAG_APCS_FLOAT},	\
-  {"apcs-reentrant",		ARM_FLAG_APCS_REENT},	\
+  {"apcs-reentrant",		ARM_FLAG_APCS_REENT, "Generate re-entrant, PIC code" },	\
   {"no-apcs-reentrant",	       -ARM_FLAG_APCS_REENT},	\
-  {"short-load-bytes",		ARM_FLAG_SHORT_BYTE},	\
+  {"short-load-bytes",		ARM_FLAG_SHORT_BYTE, "Load shorts a byte at a time" },	\
   {"no-short-load-bytes",      -ARM_FLAG_SHORT_BYTE},	\
-  {"short-load-words",	       -ARM_FLAG_SHORT_BYTE},	\
+  {"short-load-words",	       -ARM_FLAG_SHORT_BYTE, "Load words a byte at a time" },	\
   {"no-short-load-words",	ARM_FLAG_SHORT_BYTE},	\
-  {"soft-float",		ARM_FLAG_SOFT_FLOAT},	\
-  {"hard-float",	       -ARM_FLAG_SOFT_FLOAT},	\
-  {"big-endian",		ARM_FLAG_BIG_END},	\
-  {"little-endian",	       -ARM_FLAG_BIG_END},	\
-  {"thumb-interwork",		ARM_FLAG_THUMB},	\
+  {"soft-float",		ARM_FLAG_SOFT_FLOAT, "Use library calls to perform FP operations" },	\
+  {"hard-float",	       -ARM_FLAG_SOFT_FLOAT, "Use hardware floating point instructions" },	\
+  {"big-endian",		ARM_FLAG_BIG_END, "Assume target CPU is configured as big endian" },	\
+  {"little-endian",	       -ARM_FLAG_BIG_END, "Assume target CPU is configured as little endian" },	\
+  {"words-little-endian",       ARM_FLAG_LITTLE_WORDS, "Assume big endian bytes, little endian words" },	\
+  {"thumb-interwork",		ARM_FLAG_THUMB, "Support calls between THUMB and ARM instructions sets" },	\
   {"no-thumb-interwork",       -ARM_FLAG_THUMB},	\
-  {"words-little-endian",       ARM_FLAG_LITTLE_WORDS},	\
   SUBTARGET_SWITCHES					\
   {"",				TARGET_DEFAULT }	\
 }
 
 #define TARGET_OPTIONS			\
 {					\
-  {"cpu=",  &arm_select[1].string},	\
-  {"arch=", &arm_select[2].string},	\
-  {"tune=", &arm_select[3].string},	\
-  {"fp=",   &target_fp_name}		\
+  {"cpu=",  & arm_select[1].string, "Specify the name of the target CPU" },	\
+  {"arch=", & arm_select[2].string, "Specify the name of the target architecture" }, \
+  {"tune=", & arm_select[3].string},	\
+  {"fp=",   & target_fp_name, "Specify the version of the floating point emulator"} \
 }
 
 /* arm_select[0] is reserved for the default cpu.  */