diff options
Diffstat (limited to 'file.c')
| -rw-r--r-- | file.c | 200 |
1 files changed, 107 insertions, 93 deletions
@@ -414,6 +414,104 @@ set_intermediate (const void *item) f->intermediate = 1; } +/* Expand and parse each dependency line. */ +static void +expand_deps (struct file *f) +{ + register struct dep *d, *d1; + struct dep *new = 0; + struct dep *old = f->deps; + unsigned int last_dep_has_cmds = f->updating; + + f->updating = 0; + f->deps = 0; + + /* We are going to do second expansion so initialize file + variables for the file. */ + initialize_file_variables (f, 0); + + for (d = old; d != 0; d = d->next) + { + if (d->name != 0) + { + char *p; + struct dep **d_ptr; + + set_file_variables (f); + + p = variable_expand_for_file (d->name, f); + + /* Parse the dependencies. */ + new = (struct dep *) + multi_glob ( + parse_file_seq (&p, '|', sizeof (struct dep), 1), + sizeof (struct dep)); + + if (*p) + { + /* Files that follow '|' are special prerequisites that + need only exist in order to satisfy the dependency. + Their modification times are irrelevant. */ + + struct dep *d; + for (d_ptr = &new; *d_ptr; d_ptr = &(*d_ptr)->next) + ; + ++p; + + *d_ptr = (struct dep *) + multi_glob ( + parse_file_seq (&p, '\0', sizeof (struct dep), 1), + sizeof (struct dep)); + + for (d = *d_ptr; d != 0; d = d->next) + d->ignore_mtime = 1; + } + + /* Enter them as files. */ + for (d1 = new; d1 != 0; d1 = d1->next) + { + d1->file = lookup_file (d1->name); + if (d1->file == 0) + d1->file = enter_file (d1->name); + else + free (d1->name); + d1->name = 0; + } + + /* Add newly parsed deps to f->deps. If this is the last + dependency line and this target has commands then put + it in front so the last dependency line (the one with + commands) ends up being the first. This is important + because people expect $< to hold first prerequisite + from the rule with commands. If it is not the last + dependency line or the rule does not have commands + then link it at the end so it appears in makefile + order. */ + + if (new != 0) + { + if (d->next == 0 && last_dep_has_cmds) + { + for (d_ptr = &new; *d_ptr; d_ptr = &(*d_ptr)->next) + ; + + *d_ptr = f->deps; + f->deps = new; + } + else + { + for (d_ptr = &(f->deps); *d_ptr; d_ptr = &(*d_ptr)->next) + ; + + *d_ptr = new; + } + } + } + } + + free_ns_chain ((struct nameseq*)old); +} + /* For each dependency of each file, make the `struct dep' point at the appropriate `struct file' (which may have to be created). @@ -425,7 +523,7 @@ snap_deps (void) { register struct file *f; register struct file *f2; - register struct dep *d, *d1; + register struct dep *d; register struct file **file_slot_0; register struct file **file_slot; register struct file **file_end; @@ -433,105 +531,21 @@ snap_deps (void) /* Perform second expansion and enter each dependency name as a file. */ + /* Expand .SUFFIXES first; it's dependencies are used for + $$* calculation. */ + for (f = lookup_file (".SUFFIXES"); f != 0; f = f->prev) + expand_deps (f); + /* We must use hash_dump (), because within this loop we might add new files to the table, possibly causing an in-situ table expansion. */ file_slot_0 = (struct file **) hash_dump (&files, 0, 0); file_end = file_slot_0 + files.ht_fill; for (file_slot = file_slot_0; file_slot < file_end; file_slot++) - for (f2 = *file_slot; f2 != 0; f2 = f2->prev) + for (f = *file_slot; f != 0; f = f->prev) { - struct dep *new = 0; - struct dep *old = f2->deps; - unsigned int last_dep_has_cmds = f2->updating; - - f2->updating = 0; - f2->deps = 0; - - /* We are going to do second expansion so initialize file - variables for the file. */ - initialize_file_variables (f2, 0); - - for (d = old; d != 0; d = d->next) - { - if (d->name != 0) - { - char *p; - struct dep **d_ptr; - - set_file_variables (f2); - - p = variable_expand_for_file (d->name, f2); - - /* Parse the dependencies. */ - new = (struct dep *) - multi_glob ( - parse_file_seq (&p, '|', sizeof (struct dep), 1), - sizeof (struct dep)); - - if (*p) - { - /* Files that follow '|' are special prerequisites that - need only exist in order to satisfy the dependency. - Their modification times are irrelevant. */ - - struct dep *d; - for (d_ptr = &new; *d_ptr; d_ptr = &(*d_ptr)->next) - ; - ++p; - - *d_ptr = (struct dep *) - multi_glob ( - parse_file_seq (&p, '\0', sizeof (struct dep), 1), - sizeof (struct dep)); - - for (d = *d_ptr; d != 0; d = d->next) - d->ignore_mtime = 1; - } - - /* Enter them as files. */ - for (d1 = new; d1 != 0; d1 = d1->next) - { - d1->file = lookup_file (d1->name); - if (d1->file == 0) - d1->file = enter_file (d1->name); - else - free (d1->name); - d1->name = 0; - } - - /* Add newly parsed deps to f2->deps. If this is the last - dependency line and this target has commands then put - it in front so the last dependency line (the one with - commands) ends up being the first. This is important - because people expect $< to hold first prerequisite - from the rule with commands. If it is not the last - dependency line or the rule does not have commands - then link it at the end so it appears in makefile - order. */ - - if (new != 0) - { - if (d->next == 0 && last_dep_has_cmds) - { - for (d_ptr = &new; *d_ptr; d_ptr = &(*d_ptr)->next) - ; - - *d_ptr = f2->deps; - f2->deps = new; - } - else - { - for (d_ptr = &(f2->deps); *d_ptr; d_ptr = &(*d_ptr)->next) - ; - - *d_ptr = new; - } - } - } - } - - free_ns_chain ((struct nameseq*)old); + if (strcmp (f->name, ".SUFFIXES") != 0) + expand_deps (f); } free (file_slot_0); |