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Diffstat (limited to 'gcc/doc/tm.texi')
| -rw-r--r-- | gcc/doc/tm.texi | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/doc/tm.texi b/gcc/doc/tm.texi index 431b414..11be5d0 100644 --- a/gcc/doc/tm.texi +++ b/gcc/doc/tm.texi @@ -778,6 +778,23 @@ options are changed via @code{#pragma GCC optimize} or by using the Set target-dependent initial values of fields in @var{opts}. @end deftypefn +@deftypefn {Common Target Hook} {const char *} TARGET_COMPUTE_MULTILIB (const struct switchstr *@var{switches}, int @var{n_switches}, const char *@var{multilib_dir}, const char *@var{multilib_defaults}, const char *@var{multilib_select}, const char *@var{multilib_matches}, const char *@var{multilib_exclusions}, const char *@var{multilib_reuse}) +Some targets like RISC-V might have complicated multilib reuse rules which +are hard to implement with the current multilib scheme. This hook allows +targets to override the result from the built-in multilib mechanism. +@var{switches} is the raw option list with @var{n_switches} items; +@var{multilib_dir} is the multi-lib result which is computed by the built-in +multi-lib mechanism; +@var{multilib_defaults} is the default options list for multi-lib; +@var{multilib_select} is the string containing the list of supported +multi-libs, and the option checking list. +@var{multilib_matches}, @var{multilib_exclusions}, and @var{multilib_reuse} +are corresponding to @var{MULTILIB_MATCHES}, @var{MULTILIB_EXCLUSIONS}, +and @var{MULTILIB_REUSE}. +The default definition does nothing but return @var{multilib_dir} directly. +@end deftypefn + + @defmac SWITCHABLE_TARGET Some targets need to switch between substantially different subtargets during compilation. For example, the MIPS target has one subtarget for |