`target_flags'. Its definition is an initializer with a subgrouping for
each command option.
- Each subgrouping contains a string constant, that defines the option name,
- and a number, which contains the bits to set in `target_flags'. A negative
- number says to clear bits instead; the negative of the number is which bits
- to clear. The actual option name is made by appending `-m' to the specified
- name.
+ Each subgrouping contains a string constant, that defines the option name, a
+ number, which contains the bits to set in `target_flags', and a second
+ string which is the description displayed by `--help'. If the number is
+ negative then the bits specified by the number are cleared instead of being
+ set. If the description string is present but empty, then no help
+ information will be displayed for that option, but it will not count as an
+ undocumented option. The actual option name is made by appending `-m' to
+ the specified name.
One of the subgroupings should have a null string. The number in this
- grouping is the default value for `target_flags'. Any target options act
+ grouping is the default value for target_flags. Any target options act
starting with that value.
- Here is an example which defines `-m68000' and `-m68020' with opposite
- meanings, and picks the latter as the default:
+ Here is an example which defines -m68000 and -m68020 with opposite meanings,
+ and picks the latter as the default:
- #define TARGET_SWITCHES \
- { { "68020", 1}, \
- { "68000", -1}, \
- { "", 1}} */
+ #define TARGET_SWITCHES \
+ { { "68020", TARGET_MASK_68020, "" }, \
+ { "68000", -TARGET_MASK_68020, "Compile for the 68000" }, \
+ { "", TARGET_MASK_68020, "" }} */
#define TARGET_SWITCHES \
{ \
- { "cond-move", -MASK_NO_COND_MOVE }, \
- { "no-cond-move", MASK_NO_COND_MOVE }, \
- { "debug-arg", MASK_DEBUG_ARG }, \
- { "debug-stack", MASK_DEBUG_STACK }, \
- { "debug-addr", MASK_DEBUG_ADDR }, \
- { "asm-optimize", 0 }, \
- { "no-asm-optimize", 0 }, \
- { "extmem", 0 }, \
- { "extmemory", 0 }, \
- { "onchip", 0 }, \
- { "", TARGET_DEFAULT }, \
+ { "cond-move", -MASK_NO_COND_MOVE, \
+ N_("Enable use of conditional move instructions") }, \
+ \
+ { "no-cond-move", MASK_NO_COND_MOVE, \
+ N_("Disable use of conditional move instructions") }, \
+ \
+ { "debug-arg", MASK_DEBUG_ARG, \
+ N_("Debug argument support in compiler") }, \
+ \
+ { "debug-stack", MASK_DEBUG_STACK, \
+ N_("Debug stack support in compiler") }, \
+ \
+ { "debug-addr", MASK_DEBUG_ADDR, \
+ N_("Debug memory address support in compiler") }, \
+ \
+ { "asm-optimize", 0, \
+ N_("Make adjacent short instructions parallel if possible.") }, \
+ \
+ { "no-asm-optimize", 0, \
+ N_("Do not make adjacent short instructions parallel.") }, \
+ \
+ { "extmem", 0, \
+ N_("Link programs/data to be in external memory by default") }, \
+ \
+ { "extmemory", 0, \
+ N_("Link programs/data to be in external memory by default") }, \
+ \
+ { "onchip", 0, \
+ N_("Link programs/data to be in onchip memory by default") }, \
+ \
+ { "", TARGET_DEFAULT, "" }, \
}
/* This macro is similar to `TARGET_SWITCHES' but defines names of command
subgrouping for each command option.
Each subgrouping contains a string constant, that defines the fixed part of
- the option name, and the address of a variable. The variable, type `char
- *', is set to the variable part of the given option if the fixed part
- matches. The actual option name is made by appending `-m' to the specified
- name.
+ the option name, the address of a variable, and a description string. The
+ variable, type `char *', is set to the variable part of the given option if
+ the fixed part matches. The actual option name is made by appending `-m' to
+ the specified name.
- Here is an example which defines `-mshort-data-NUMBER'. If the given option
- is `-mshort-data-512', the variable `m88k_short_data' will be set to the
- string `"512"'.
+ Here is an example which defines `-mshort-data-<number>'. If the given
+ option is `-mshort-data-512', the variable `m88k_short_data' will be set to
+ the string "512".
- extern char *m88k_short_data;
- #define TARGET_OPTIONS \
- { { "short-data-", &m88k_short_data } } */
+ extern char *m88k_short_data;
+ #define TARGET_OPTIONS \
+ { { "short-data-", &m88k_short_data, \
+ "Specify the size of the short data section" } } */
#define TARGET_OPTIONS \
{ \
- {"branch-cost=", &d30v_branch_cost_string}, \
- {"cond-exec=", &d30v_cond_exec_string}, \
+ {"branch-cost=", &d30v_branch_cost_string, \
+ N_("Change the branch costs within the compiler") }, \
+ \
+ {"cond-exec=", &d30v_cond_exec_string, \
+ N_("Change the threshold for conversion to conditional execution") }, \
}
/* This macro is a C statement to print on `stderr' a string describing the
*Do not examine `write_symbols' in this macro!* The debugging options are
*not supposed to alter the generated code. */
-/* #define OPTIMIZATION_OPTIONS(LEVEL,SIZE) */
+
+/* -frename-registers seems to abort on d30v, turn off until fixed. */
+#define OPTIMIZATION_OPTIONS(LEVEL,SIZE) \
+do { \
+ if (LEVEL >= 3) \
+ flag_rename_registers = 0; \
+} while (0)
/* Define this macro if debugging can be performed even without a frame
pointer. If this macro is defined, GNU CC will turn on the
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