cppinit.c: Update comments.
* cppinit.c: Update comments. (cpp_reader_init): Make -imacro and -include use the standard #include "" search path. (do_includes): New function. From-SVN: r37542
This commit is contained in:
Neil Booth
Neil Booth
parent
18c07aaf6d
commit
4a58aab6a7
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@ -1,3 +1,10 @@
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2000-11-18 Neil Booth <neilb@earthling.net>
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* cppinit.c: Update comments.
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(cpp_reader_init): Make -imacro and -include use the standard
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#include "" search path.
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(do_includes): New function.
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2000-11-18 Ben Elliston <bje@redhat.com>
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* config/sh/crt1.asm (start_l): Move PC-relative move instruction
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124
gcc/cppinit.c
124
gcc/cppinit.c
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@ -30,7 +30,7 @@ Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "mkdeps.h"
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#include "cppdefault.h"
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/* Predefined symbols, built-in macros, and the default include path. */
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/* Predefined symbols, built-in macros, and the default include path. */
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#ifndef GET_ENV_PATH_LIST
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#define GET_ENV_PATH_LIST(VAR,NAME) do { (VAR) = getenv (NAME); } while (0)
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@ -47,13 +47,10 @@ Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#define INO_T_EQ(a, b) ((a) == (b))
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#endif
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/* Internal structures and prototypes. */
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/* Internal structures and prototypes. */
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/* A `struct pending_option' remembers one -D, -A, -U, -include, or -imacros
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switch. There are four lists: one for -D and -U, one for -A, one
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for -include, one for -imacros. `undef' is set for -U, clear for
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-D, ignored for the others.
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(Future: add an equivalent of -U for -A) */
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/* A `struct pending_option' remembers one -D, -A, -U, -include, or
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-imacros switch. */
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typedef void (* cl_directive_handler) PARAMS ((cpp_reader *, const char *));
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struct pending_option
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@ -66,7 +63,7 @@ struct pending_option
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/* The `pending' structure accumulates all the options that are not
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actually processed until we hit cpp_start_read. It consists of
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several lists, one for each type of option. We keep both head and
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tail pointers for quick insertion. */
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tail pointers for quick insertion. */
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struct cpp_pending
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{
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struct pending_option *directive_head, *directive_tail;
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@ -105,7 +102,9 @@ struct file_name_list * remove_dup_dir PARAMS ((cpp_reader *,
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struct file_name_list * remove_dup_dirs PARAMS ((cpp_reader *,
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struct file_name_list *));
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static void merge_include_chains PARAMS ((cpp_reader *));
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static void do_includes PARAMS ((cpp_reader *,
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struct pending_option *,
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int));
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static void initialize_dependency_output PARAMS ((cpp_reader *));
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static void initialize_standard_includes PARAMS ((cpp_reader *));
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static void new_pending_directive PARAMS ((struct cpp_pending *,
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@ -116,7 +115,7 @@ static int opt_comp PARAMS ((const void *, const void *));
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#endif
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static int parse_option PARAMS ((const char *));
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/* Fourth argument to append_include_chain: chain to use */
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/* Fourth argument to append_include_chain: chain to use. */
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enum { QUOTE = 0, BRACKET, SYSTEM, AFTER };
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/* If we have designated initializers (GCC >2.7) these tables can be
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@ -124,10 +123,10 @@ enum { QUOTE = 0, BRACKET, SYSTEM, AFTER };
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runtime. */
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#if HAVE_DESIGNATED_INITIALIZERS
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#define init_IStable() /* nothing */
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#define init_IStable() /* Nothing. */
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#define ISTABLE __extension__ const U_CHAR _cpp_IStable[UCHAR_MAX + 1] = {
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#define init_trigraph_map() /* nothing */
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#define init_trigraph_map() /* Nothing. */
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#define TRIGRAPH_MAP \
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__extension__ const U_CHAR _cpp_trigraph_map[UCHAR_MAX + 1] = {
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@ -343,7 +342,7 @@ remove_dup_dirs (pfile, head)
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bracket_include path.
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For the future: Check if the directory is empty (but
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how?) and possibly preload the include hash. */
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how?) and possibly preload the include hash. */
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static void
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merge_include_chains (pfile)
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@ -452,7 +451,7 @@ cpp_reader_init (pfile)
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CPP_OPTION (pfile, pending) =
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(struct cpp_pending *) xcalloc (1, sizeof (struct cpp_pending));
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/* Initialize comment saving state. */
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/* Initialize lexer state. */
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pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments);
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/* Indicate date and time not yet calculated. */
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@ -475,7 +474,7 @@ cpp_reader_init (pfile)
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/* Macro pool initially 8K. Aligned, permanent pool. */
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_cpp_init_pool (&pfile->macro_pool, 8 * 1024, 0, 0);
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/* Start with temporary pool. */
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/* Start with temporary pool. */
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pfile->string_pool = &pfile->temp_string_pool;
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_cpp_init_hashtable (pfile);
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@ -823,18 +822,42 @@ initialize_standard_includes (pfile)
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|| (CPP_OPTION (pfile, cplusplus)
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&& !CPP_OPTION (pfile, no_standard_cplusplus_includes)))
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{
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/* XXX Potential memory leak! */
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char *str = xstrdup (update_path (p->fname, p->component));
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append_include_chain (pfile, str, SYSTEM, p->cxx_aware);
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}
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}
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}
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/* This is called after options have been processed.
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* Check options for consistency, and setup for processing input
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* from the file named FNAME. (Use standard input if FNAME==NULL.)
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* Return 1 on success, 0 on failure.
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*/
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/* Handles -imacro and -include from the command line. */
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static void
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do_includes (pfile, p, scan)
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cpp_reader *pfile;
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struct pending_option *p;
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int scan;
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{
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while (p)
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{
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cpp_token header;
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struct pending_option *q;
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header.type = CPP_STRING;
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header.val.str.text = (unsigned char *) p->arg;
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header.val.str.len = strlen (p->arg);
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/* Use the #include "" search path. */
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_cpp_execute_include (pfile, &header, 0, 0);
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if (scan)
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cpp_scan_buffer_nooutput (pfile);
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q = p->next;
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free (p);
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p = q;
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}
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}
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/* This is called after options have been processed. Check options
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for consistency, and setup for processing input from the file named
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FNAME. (Use standard input if FNAME == NULL.) Return 1 on success,
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0 on failure. */
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int
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cpp_start_read (pfile, fname)
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@ -918,27 +941,12 @@ cpp_start_read (pfile, fname)
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pfile->done_initializing = 1;
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/* The -imacros files can be scanned now, but the -include files
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have to be pushed onto the include stack and processed later,
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in the main loop calling cpp_get_token. */
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p = CPP_OPTION (pfile, pending)->imacros_head;
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while (p)
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{
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if (cpp_read_file (pfile, p->arg))
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cpp_scan_buffer_nooutput (pfile);
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q = p->next;
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free (p);
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p = q;
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}
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p = CPP_OPTION (pfile, pending)->include_head;
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while (p)
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{
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cpp_read_file (pfile, p->arg);
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q = p->next;
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free (p);
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p = q;
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}
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have to be pushed onto the buffer stack and processed later,
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otherwise cppmain.c won't see the tokens. include_head was built
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up as a stack, and popping this stack onto the buffer stack means
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we preserve the order of the command line. */
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do_includes (pfile, CPP_OPTION (pfile, pending)->imacros_head, 1);
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do_includes (pfile, CPP_OPTION (pfile, pending)->include_head, 0);
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free (CPP_OPTION (pfile, pending));
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CPP_OPTION (pfile, pending) = NULL;
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@ -949,7 +957,7 @@ cpp_start_read (pfile, fname)
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/* This is called at the end of preprocessing. It pops the
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last buffer and writes dependency output. It should also
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clear macro definitions, such that you could call cpp_start_read
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with a new filename to restart processing. */
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with a new filename to restart processing. */
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void
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cpp_finish (pfile)
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cpp_reader *pfile;
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@ -1118,7 +1126,7 @@ static const struct cl_option cl_options[] =
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e.g. -iwithprefix and -iwithprefixbefore. Moreover, we want to
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accept options beginning with -g and -W that we do not recognise,
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but not to swallow any subsequent command line argument; these are
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handled as special cases in cpp_handle_option */
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handled as special cases in cpp_handle_option. */
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static int
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parse_option (input)
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const char *input;
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@ -1149,13 +1157,13 @@ parse_option (input)
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we may match a later option or we may have been passed the
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argument. The longest possible option match succeeds.
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If the option takes no arguments we have not matched and
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continue the search (e.g. input="stdc++" match was "stdc") */
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continue the search (e.g. input="stdc++" match was "stdc"). */
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mn = md + 1;
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if (cl_options[md].msg)
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{
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/* Scan forwards. If we get an exact match, return it.
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Otherwise, return the longest option-accepting match.
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This loops no more than twice with current options */
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This loops no more than twice with current options. */
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mx = md;
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for (; mn < N_OPTS; mn++)
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{
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@ -1204,7 +1212,7 @@ cpp_handle_option (pfile, argc, argv)
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int opt_index;
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const char *arg = 0;
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/* Skip over '-' */
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/* Skip over '-'. */
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opt_index = parse_option (&argv[i][1]);
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if (opt_index < 0)
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return i;
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@ -1216,7 +1224,7 @@ cpp_handle_option (pfile, argc, argv)
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/* Yuk. Special case for -g and -W as they must not swallow
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up any following argument. If this becomes common, add
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another field to the cl_options table */
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another field to the cl_options table. */
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if (arg[0] == '\0' && !(opt_code == OPT_g || opt_code == OPT_W))
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{
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arg = argv[++i];
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@ -1230,7 +1238,7 @@ cpp_handle_option (pfile, argc, argv)
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switch (opt_code)
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{
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case N_OPTS: /* shut GCC up */
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case N_OPTS: /* Shut GCC up. */
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break;
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case OPT_fleading_underscore:
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CPP_OPTION (pfile, user_label_prefix) = "_";
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@ -1263,7 +1271,7 @@ cpp_handle_option (pfile, argc, argv)
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case OPT_w:
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CPP_OPTION (pfile, inhibit_warnings) = 1;
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break;
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case OPT_g: /* Silently ignore anything but -g3 */
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case OPT_g: /* Silently ignore anything but -g3. */
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if (!strcmp(&argv[i][2], "3"))
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CPP_OPTION (pfile, debug_output) = 1;
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break;
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@ -1286,7 +1294,7 @@ cpp_handle_option (pfile, argc, argv)
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case OPT_P:
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CPP_OPTION (pfile, no_line_commands) = 1;
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break;
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case OPT_dollar: /* Don't include $ in identifiers. */
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case OPT_dollar: /* Don't include $ in identifiers. */
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CPP_OPTION (pfile, dollars_in_ident) = 0;
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break;
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case OPT_H:
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@ -1423,7 +1431,7 @@ cpp_handle_option (pfile, argc, argv)
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CPP_OPTION (pfile, verbose) = 1;
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break;
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case OPT_stdin_stdout:
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/* JF handle '-' as file name meaning stdin or stdout */
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/* JF handle '-' as file name meaning stdin or stdout. */
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if (CPP_OPTION (pfile, in_fname) == NULL)
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CPP_OPTION (pfile, in_fname) = "";
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else if (CPP_OPTION (pfile, out_fname) == NULL)
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@ -1432,7 +1440,7 @@ cpp_handle_option (pfile, argc, argv)
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case OPT_d:
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/* Args to -d specify what parts of macros to dump.
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Silently ignore unrecognised options; they may
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be aimed at the compiler proper. */
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be aimed at the compiler proper. */
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{
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char c;
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@ -1479,9 +1487,9 @@ cpp_handle_option (pfile, argc, argv)
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else
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CPP_OPTION (pfile, print_deps) = 1;
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/* For -MD and -MMD options, write deps on file named by next arg */
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/* For -M and -MM, write deps on standard output
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and suppress the usual output. */
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/* For -MD and -MMD, write deps on file named by next arg. */
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/* For -M and -MM, write deps on standard output and
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suppress the usual output. */
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if (opt_code == OPT_MD || opt_code == OPT_MMD)
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CPP_OPTION (pfile, deps_file) = arg;
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else
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@ -1549,7 +1557,7 @@ cpp_handle_option (pfile, argc, argv)
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break;
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case OPT_isystem:
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/* Add directory to beginning of system include path, as a system
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include directory. */
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include directory. */
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append_include_chain (pfile, xstrdup (arg), SYSTEM, 0);
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break;
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case OPT_include:
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@ -1613,7 +1621,7 @@ cpp_handle_option (pfile, argc, argv)
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append_include_chain (pfile, xstrdup (arg), AFTER, 0);
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break;
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case OPT_W:
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/* Silently ignore unrecognised options */
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/* Silently ignore unrecognised options. */
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if (!strcmp (argv[i], "-Wall"))
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{
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CPP_OPTION (pfile, warn_trigraphs) = 1;
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