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gcc.c (TARGET_OPTION_TRANSLATE_TABLE): New. 

* gcc.c (TARGET_OPTION_TRANSLATE_TABLE): New.
(translate_options): If the above is defined, use it to map
given options to new options.
* doc/tm.texi: Document it.

From-SVN: r43787
This commit is contained in:
DJ Delorie 2001-07-05 16:09:34 -04:00 committed by DJ Delorie
parent 081ca317a4
commit 0259b07a28
3 changed files with 91 additions and 1 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2001-07-05 DJ Delorie <dj@redhat.com>
* gcc.c (TARGET_OPTION_TRANSLATE_TABLE): New.
(translate_options): If the above is defined, use it to map
given options to new options.
* doc/tm.texi: Document it.
2001-07-05 Brad Lucier <lucier@math.purdue.edu>
Gerald Pfeifer <pfeifer@dbai.tuwien.ac.at>

20
gcc/doc/tm.texi
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@ -140,6 +140,26 @@ the linker needs a space between the option and its argument.
If this macro is not defined, the default value is @code{""}.
@findex TARGET_OPTION_TRANSLATE_TABLE
@item TARGET_OPTION_TRANSLATE_TABLE
If defined, a list of pairs of strings, the first of which is a
potential command line target to the @file{gcc} driver program, and the
second of which is a space-separated (tabs and other whitespace are not
supported) list of options with which to replace the first option. The
target defining this list is responsible for assuring that the results
are valid. Replacement options may not be the @code{--opt} style, they
must be the @code{-opt} style. It is the intention of this macro to
provide a mechanism for substitution that affects the multilibs chosen,
such as one option that enables many options, some of which select
multilibs. Example nonsensical definition, where @code{-malt-abi},
@code{-EB}, and @code{-mspoo} cause different multilibs to be chosen:
@example
#define TARGET_OPTION_TRANSLATE_TABLE \
@{ "-fast", "-march=fast-foo -malt-abi -I/usr/fast-foo" @}, \
@{ "-compat", "-EB -malign=4 -mspoo" @}
@end example
@findex CPP_SPEC
@item CPP_SPEC
A C string constant that tells the GCC driver program options to

65
gcc/gcc.c
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@ -952,6 +952,18 @@ struct option_map option_map[] =
{"--", "-f", "*j"}
};
#ifdef TARGET_OPTION_TRANSLATE_TABLE
static struct {
const char *option_found;
const char *replacements;
} target_option_translations[] =
{
TARGET_OPTION_TRANSLATE_TABLE,
{ 0, 0 }
};
#endif
/* Translate the options described by *ARGCP and *ARGVP.
Make a new vector and store it back in *ARGVP,
and store its length in *ARGVC. */
@ -964,8 +976,9 @@ translate_options (argcp, argvp)
int i;
int argc = *argcp;
const char *const *argv = *argvp;
int newvsize = (argc + 2) * 2 * sizeof (const char *);
const char **newv =
(const char **) xmalloc ((argc + 2) * 2 * sizeof (const char *));
(const char **) xmalloc (newvsize);
int newindex = 0;
i = 0;
@ -973,6 +986,56 @@ translate_options (argcp, argvp)
while (i < argc)
{
#ifdef TARGET_OPTION_TRANSLATE_TABLE
int tott_idx;
for (tott_idx = 0;
target_option_translations[tott_idx].option_found;
tott_idx++)
{
if (strcmp (target_option_translations[tott_idx].option_found,
argv[i]) == 0)
{
int spaces = 1;
const char *sp;
char *np;
for (sp = target_option_translations[tott_idx].replacements;
*sp; sp++)
{
if (*sp == ' ')
spaces ++;
}
newvsize += spaces * sizeof (const char *);
newv = (const char **) xrealloc (newv, newvsize);
sp = target_option_translations[tott_idx].replacements;
np = (char *) xmalloc (strlen (sp) + 1);
strcpy (np, sp);
while (1)
{
while (*np == ' ')
np++;
if (*np == 0)
break;
newv[newindex++] = np;
while (*np != ' ' && *np)
np++;
if (*np == 0)
break;
*np++ = 0;
}
i ++;
break;
}
}
if (target_option_translations[tott_idx].option_found)
continue;
#endif
/* Translate -- options. */
if (argv[i][0] == '-' && argv[i][1] == '-')
{