diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/comp.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/src/comp.c b/src/comp.c index b7541c5d9f7..14012634ccc 100644 --- a/src/comp.c +++ b/src/comp.c @@ -5868,8 +5868,21 @@ The last directory of this list is assumed to be the system one. */); Vnative_comp_eln_load_path = Fcons (build_string ("../native-lisp/"), Qnil); DEFVAR_BOOL ("comp-enable-subr-trampolines", comp_enable_subr_trampolines, - doc: /* If non-nil enable primitive trampoline synthesis. -This makes primitive functions redefinable or advisable effectively. */); + doc: /* If non-nil, enable primitive trampoline synthesis. +This makes Emacs respect redefinition or advises of primitive functions +when they are called from Lisp code natively-compiled at `native-comp-speed' +of 2. + +By default, this is enabled, and when Emacs sees a redefined or advised +primitive called from natively-compiled Lisp, it generates a trampoline +for it on-the-fly. + +Disabling this, when a trampoline for a redefined or advised primitive is +not available from previous compilations, means that such redefinition +or advise will not have effect on calls from natively-compiled Lisp code. +That is, calls to primitives without existing trampolines from +natively-compiled Lisp will behave as if the primitive was called +directly from C. */); DEFVAR_LISP ("comp-installed-trampolines-h", Vcomp_installed_trampolines_h, doc: /* Hash table subr-name -> installed trampoline. |