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| author | Jason Thorpe <thorpej@wasabisystems.com> | 2002-11-19 04:37:50 +0000 |
|---|---|---|
| committer | Jason Thorpe <thorpej@gcc.gnu.org> | 2002-11-19 04:37:50 +0000 |
| commit | f3226a90019efdcdd3f1be3ef4fe19ff7f8d7f23 (patch) | |
| tree | a48e1f22c976c1cbedd74ba5fba89fa5a4479319 /gcc/doc | |
| parent | 3b312ef46fc9f3319b688174a105d5827dd122b1 (diff) | |
| download | gcc-f3226a90019efdcdd3f1be3ef4fe19ff7f8d7f23.zip gcc-f3226a90019efdcdd3f1be3ef4fe19ff7f8d7f23.tar.gz gcc-f3226a90019efdcdd3f1be3ef4fe19ff7f8d7f23.tar.bz2 | |
gcc.c (The Specs Language): Document spec functions.
* gcc.c (The Specs Language): Document spec functions.
(static_spec_functions, lookup_spec_function)
(eval_spec_function, handle_spec_function)
(if_exists_spec_function, alloc_args): New.
(execute): Abort if processing_spec_function is true.
(do_spec_1): Hand off spec to handle_spec_function if %:
is encountered. If processing_spec_function is true,
end any pending argument when the end of the string is reached.
(main): Use alloc_args to allocate the initial argument vector.
* gcc.h (struct spec_function): New.
(lang_specific_spec_functions): New extern.
* config/netbsd-elf.h (STARTFILE_SPEC): Add if-exists(crti%O%s).
(ENDFILE_SPEC): Add if-exists(crtn%O%s).
* config/alpha/netbsd.h (ENDFILE_SPEC): Likewise.
* doc/invoke.texi: Document spec functions.
* cppspec.c (lang_specific_spec_functions): New.
* gccspec.c: Likewise.
* g++spec.c (lang_specific_spec_functions): New.
* g77spec.c (lang_specific_spec_functions): New.
* jvspec.c (lang_specific_spec_functions): New.
From-SVN: r59241
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 1df52de..45fee6f 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -4967,6 +4967,27 @@ Substitute the variable part of a matched option. See below. Note that each comma in the substituted string is replaced by a single space. +@item %:@var{function}(@var{args}) +Call the named function @var{function}, passing it @var{args}. +@var{args} is first processed as a nested spec string, then split +into an argument vector in the usual fashion. The function returns +a string which is processed as if it had appeared literally as part +of the current spec. + +The following built-in spec functions are provided: + +@table @code +@item @code{if-exists} +The @code{if-exists} spec function takes one argument, an absolute +pathname to a file. If the file exists, @code{if-exists} returns the +pathname. Here is a small example of its usage: + +@smallexample +*startfile: +crt0%O%s %:if-exists(crti%O%s) crtbegin%O%s +@end smallexample +@end table + @item %@{@code{S}@} Substitutes the @code{-S} switch, if that switch was given to GCC@. If that switch was not specified, this substitutes nothing. Note that |