/* Dependency generator for Makefile fragments.
- Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc.
+ Copyright (C) 2000-2020 Free Software Foundation, Inc.
Contributed by Zack Weinberg, Mar 2000
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
-Free Software Foundation; either version 2, or (at your option) any
+Free Software Foundation; either version 3, or (at your option) any
later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+along with this program; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>.
In other words, you are welcome to use, share and improve this program.
You are forbidden to forbid anyone else to use, share and improve
#include "config.h"
#include "system.h"
#include "mkdeps.h"
+#include "internal.h"
+
+/* Not set up to just include std::vector et al, here's a simple
+ implementation. */
/* Keep this structure local to this file, so clients don't find it
easy to start making assumptions. */
-struct deps
-{
- const char **targetv;
- unsigned int ntargets; /* number of slots actually occupied */
- unsigned int targets_size; /* amt of allocated space - in words */
-
- const char **depv;
- unsigned int ndeps;
- unsigned int deps_size;
-
- const char **vpathv;
- size_t *vpathlv;
- unsigned int nvpaths;
- unsigned int vpaths_size;
-};
-
-static const char *munge (const char *);
-
-/* Given a filename, quote characters in that filename which are
- significant to Make. Note that it's not possible to quote all such
- characters - e.g. \n, %, *, ?, [, \ (in some contexts), and ~ are
- not properly handled. It isn't possible to get this right in any
- current version of Make. (??? Still true? Old comment referred to
- 3.76.1.) */
-
-static const char *
-munge (const char *filename)
+class mkdeps
{
- int len;
- const char *p, *q;
- char *dst, *buffer;
-
- for (p = filename, len = 0; *p; p++, len++)
+public:
+ /* T has trivial cctor & dtor. */
+ template <typename T>
+ class vec
+ {
+ private:
+ T *ary;
+ unsigned num;
+ unsigned alloc;
+
+ public:
+ vec ()
+ : ary (NULL), num (0), alloc (0)
+ {}
+ ~vec ()
+ {
+ XDELETEVEC (ary);
+ }
+
+ public:
+ unsigned size () const
{
- switch (*p)
- {
- case ' ':
- case '\t':
- /* GNU make uses a weird quoting scheme for white space.
- A space or tab preceded by 2N+1 backslashes represents
- N backslashes followed by space; a space or tab
- preceded by 2N backslashes represents N backslashes at
- the end of a file name; and backslashes in other
- contexts should not be doubled. */
- for (q = p - 1; filename <= q && *q == '\\'; q--)
- len++;
- len++;
- break;
-
- case '$':
- /* '$' is quoted by doubling it. */
- len++;
- break;
- }
+ return num;
}
-
- /* Now we know how big to make the buffer. */
- buffer = xmalloc (len + 1);
-
- for (p = filename, dst = buffer; *p; p++, dst++)
+ const T &operator[] (unsigned ix) const
+ {
+ return ary[ix];
+ }
+ T &operator[] (unsigned ix)
{
- switch (*p)
+ return ary[ix];
+ }
+ void push (const T &elt)
+ {
+ if (num == alloc)
{
- case ' ':
- case '\t':
- for (q = p - 1; filename <= q && *q == '\\'; q--)
- *dst++ = '\\';
- *dst++ = '\\';
- break;
-
- case '$':
- *dst++ = '$';
- break;
-
- default:
- /* nothing */;
+ alloc = alloc ? alloc * 2 : 16;
+ ary = XRESIZEVEC (T, ary, alloc);
}
- *dst = *p;
+ ary[num++] = elt;
}
+ };
+ struct velt
+ {
+ const char *str;
+ size_t len;
+ };
+
+ mkdeps ()
+ : module_name (NULL), cmi_name (NULL), is_header_unit (false), quote_lwm (0)
+ {
+ }
+ ~mkdeps ()
+ {
+ unsigned int i;
+
+ for (i = targets.size (); i--;)
+ free (const_cast <char *> (targets[i]));
+ for (i = deps.size (); i--;)
+ free (const_cast <char *> (deps[i]));
+ for (i = vpath.size (); i--;)
+ XDELETEVEC (vpath[i].str);
+ for (i = modules.size (); i--;)
+ XDELETEVEC (modules[i]);
+ XDELETEVEC (module_name);
+ free (const_cast <char *> (cmi_name));
+ }
+
+public:
+ vec<const char *> targets;
+ vec<const char *> deps;
+ vec<velt> vpath;
+ vec<const char *> modules;
+
+public:
+ const char *module_name;
+ const char *cmi_name;
+ bool is_header_unit;
+ unsigned short quote_lwm;
+};
- *dst = '\0';
- return buffer;
-}
+/* Apply Make quoting to STR, TRAIL. Note that it's not possible to
+ quote all such characters - e.g. \n, %, *, ?, [, \ (in some
+ contexts), and ~ are not properly handled. It isn't possible to
+ get this right in any current version of Make. (??? Still true?
+ Old comment referred to 3.76.1.) */
-/* If T begins with any of the partial pathnames listed in d->vpathv,
- then advance T to point beyond that pathname. */
static const char *
-apply_vpath (struct deps *d, const char *t)
+munge (const char *str, const char *trail = nullptr)
{
- if (d->vpathv)
+ static unsigned alloc;
+ static char *buf;
+ unsigned dst = 0;
+
+ for (; str; str = trail, trail = nullptr)
{
- unsigned int i;
- for (i = 0; i < d->nvpaths; i++)
+ unsigned slashes = 0;
+ char c;
+ for (const char *probe = str; (c = *probe++);)
{
- if (!strncmp (d->vpathv[i], t, d->vpathlv[i]))
+ if (alloc < dst + 4 + slashes)
{
- const char *p = t + d->vpathlv[i];
- if (!IS_DIR_SEPARATOR (*p))
- goto not_this_one;
+ alloc = alloc * 2 + 32;
+ buf = XRESIZEVEC (char, buf, alloc);
+ }
- /* Do not simplify $(vpath)/../whatever. ??? Might not
- be necessary. */
- if (p[1] == '.' && p[2] == '.' && IS_DIR_SEPARATOR (p[3]))
- goto not_this_one;
+ switch (c)
+ {
+ case '\\':
+ slashes++;
+ break;
- /* found a match */
- t = t + d->vpathlv[i] + 1;
+ case '$':
+ buf[dst++] = '$';
+ goto def;
+
+ case ' ':
+ case '\t':
+ /* GNU make uses a weird quoting scheme for white space.
+ A space or tab preceded by 2N+1 backslashes
+ represents N backslashes followed by space; a space
+ or tab preceded by 2N backslashes represents N
+ backslashes at the end of a file name; and
+ backslashes in other contexts should not be
+ doubled. */
+ while (slashes--)
+ buf[dst++] = '\\';
+ /* FALLTHROUGH */
+
+ case '#':
+ case ':':
+ buf[dst++] = '\\';
+ /* FALLTHROUGH */
+
+ default:
+ def:
+ slashes = 0;
break;
}
- not_this_one:;
+
+ buf[dst++] = c;
}
}
+ buf[dst] = 0;
+ return buf;
+}
+
+/* If T begins with any of the partial pathnames listed in d->vpathv,
+ then advance T to point beyond that pathname. */
+static const char *
+apply_vpath (class mkdeps *d, const char *t)
+{
+ if (unsigned len = d->vpath.size ())
+ for (unsigned i = len; i--;)
+ {
+ if (!filename_ncmp (d->vpath[i].str, t, d->vpath[i].len))
+ {
+ const char *p = t + d->vpath[i].len;
+ if (!IS_DIR_SEPARATOR (*p))
+ goto not_this_one;
+
+ /* Do not simplify $(vpath)/../whatever. ??? Might not
+ be necessary. */
+ if (p[1] == '.' && p[2] == '.' && IS_DIR_SEPARATOR (p[3]))
+ goto not_this_one;
+
+ /* found a match */
+ t = t + d->vpath[i].len + 1;
+ break;
+ }
+ not_this_one:;
+ }
+
/* Remove leading ./ in any case. */
while (t[0] == '.' && IS_DIR_SEPARATOR (t[1]))
- t += 2;
+ {
+ t += 2;
+ /* If we removed a leading ./, then also remove any /s after the
+ first. */
+ while (IS_DIR_SEPARATOR (t[0]))
+ ++t;
+ }
return t;
}
/* Public routines. */
-struct deps *
+class mkdeps *
deps_init (void)
{
- return xcalloc (sizeof (struct deps), 1);
+ return new mkdeps ();
}
void
-deps_free (struct deps *d)
+deps_free (class mkdeps *d)
{
- unsigned int i;
-
- if (d->targetv)
- {
- for (i = 0; i < d->ntargets; i++)
- free ((void *) d->targetv[i]);
- free (d->targetv);
- }
-
- if (d->depv)
- {
- for (i = 0; i < d->ndeps; i++)
- free ((void *) d->depv[i]);
- free (d->depv);
- }
-
- if (d->vpathv)
- {
- for (i = 0; i < d->nvpaths; i++)
- free ((void *) d->vpathv[i]);
- free (d->vpathv);
- free (d->vpathlv);
- }
-
- free (d);
+ delete d;
}
/* Adds a target T. We make a copy, so it need not be a permanent
string. QUOTE is true if the string should be quoted. */
void
-deps_add_target (struct deps *d, const char *t, int quote)
+deps_add_target (class mkdeps *d, const char *t, int quote)
{
- if (d->ntargets == d->targets_size)
+ t = xstrdup (apply_vpath (d, t));
+
+ if (!quote)
{
- d->targets_size = d->targets_size * 2 + 4;
- d->targetv = xrealloc (d->targetv,
- d->targets_size * sizeof (const char *));
+ /* Sometimes unquoted items are added after quoted ones.
+ Swap out the lowest quoted. */
+ if (d->quote_lwm != d->targets.size ())
+ {
+ const char *lowest = d->targets[d->quote_lwm];
+ d->targets[d->quote_lwm] = t;
+ t = lowest;
+ }
+ d->quote_lwm++;
}
- t = apply_vpath (d, t);
- if (quote)
- t = munge (t); /* Also makes permanent copy. */
- else
- t = xstrdup (t);
-
- d->targetv[d->ntargets++] = t;
+ d->targets.push (t);
}
/* Sets the default target if none has been given already. An empty
string as the default target in interpreted as stdin. The string
is quoted for MAKE. */
void
-deps_add_default_target (struct deps *d, const char *tgt)
+deps_add_default_target (class mkdeps *d, const char *tgt)
{
/* Only if we have no targets. */
- if (d->ntargets)
+ if (d->targets.size ())
return;
if (tgt[0] == '\0')
- deps_add_target (d, "-", 1);
+ d->targets.push (xstrdup ("-"));
else
{
#ifndef TARGET_OBJECT_SUFFIX
# define TARGET_OBJECT_SUFFIX ".o"
#endif
const char *start = lbasename (tgt);
- char *o = alloca (strlen (start) + strlen (TARGET_OBJECT_SUFFIX) + 1);
+ char *o = (char *) alloca (strlen (start)
+ + strlen (TARGET_OBJECT_SUFFIX) + 1);
char *suffix;
strcpy (o, start);
}
void
-deps_add_dep (struct deps *d, const char *t)
+deps_add_dep (class mkdeps *d, const char *t)
{
- t = munge (apply_vpath (d, t)); /* Also makes permanent copy. */
+ gcc_assert (*t);
- if (d->ndeps == d->deps_size)
- {
- d->deps_size = d->deps_size * 2 + 8;
- d->depv = xrealloc (d->depv, d->deps_size * sizeof (const char *));
- }
- d->depv[d->ndeps++] = t;
+ t = apply_vpath (d, t);
+
+ d->deps.push (xstrdup (t));
}
void
-deps_add_vpath (struct deps *d, const char *vpath)
+deps_add_vpath (class mkdeps *d, const char *vpath)
{
const char *elem, *p;
- char *copy;
- size_t len;
for (elem = vpath; *elem; elem = p)
{
- for (p = elem; *p && *p != ':'; p++);
- len = p - elem;
- copy = xmalloc (len + 1);
- memcpy (copy, elem, len);
- copy[len] = '\0';
+ for (p = elem; *p && *p != ':'; p++)
+ continue;
+ mkdeps::velt elt;
+ elt.len = p - elem;
+ char *str = XNEWVEC (char, elt.len + 1);
+ elt.str = str;
+ memcpy (str, elem, elt.len);
+ str[elt.len] = '\0';
if (*p == ':')
p++;
- if (d->nvpaths == d->vpaths_size)
+ d->vpath.push (elt);
+ }
+}
+
+/* Add a new module target (there can only be one). M is the module
+ name. */
+
+void
+deps_add_module_target (struct mkdeps *d, const char *m,
+ const char *cmi, bool is_header_unit)
+{
+ gcc_assert (!d->module_name);
+
+ d->module_name = xstrdup (m);
+ d->is_header_unit = is_header_unit;
+ d->cmi_name = xstrdup (cmi);
+}
+
+/* Add a new module dependency. M is the module name. */
+
+void
+deps_add_module_dep (struct mkdeps *d, const char *m)
+{
+ d->modules.push (xstrdup (m));
+}
+
+/* Write NAME, with a leading space to FP, a Makefile. Advance COL as
+ appropriate, wrap at COLMAX, returning new column number. Iff
+ QUOTE apply quoting. Append TRAIL. */
+
+static unsigned
+make_write_name (const char *name, FILE *fp, unsigned col, unsigned colmax,
+ bool quote = true, const char *trail = NULL)
+{
+ if (quote)
+ name = munge (name, trail);
+ unsigned size = strlen (name);
+
+ if (col)
+ {
+ if (colmax && col + size> colmax)
{
- d->vpaths_size = d->vpaths_size * 2 + 8;
- d->vpathv = xrealloc (d->vpathv,
- d->vpaths_size * sizeof (const char *));
- d->vpathlv = xrealloc (d->vpathlv, d->vpaths_size * sizeof (size_t));
+ fputs (" \\\n", fp);
+ col = 0;
}
- d->vpathv[d->nvpaths] = copy;
- d->vpathlv[d->nvpaths] = len;
- d->nvpaths++;
+ col++;
+ fputs (" ", fp);
}
+
+ col += size;
+ fputs (name, fp);
+
+ return col;
}
-void
-deps_write (const struct deps *d, FILE *fp, unsigned int colmax)
+/* Write all the names in VEC via make_write_name. */
+
+static unsigned
+make_write_vec (const mkdeps::vec<const char *> &vec, FILE *fp,
+ unsigned col, unsigned colmax, unsigned quote_lwm = 0,
+ const char *trail = NULL)
+{
+ for (unsigned ix = 0; ix != vec.size (); ix++)
+ col = make_write_name (vec[ix], fp, col, colmax, ix >= quote_lwm, trail);
+ return col;
+}
+
+/* Write the dependencies to a Makefile. If PHONY is true, add
+ .PHONY targets for all the dependencies too. */
+
+static void
+make_write (const cpp_reader *pfile, FILE *fp, unsigned int colmax)
{
- unsigned int size, i, column;
+ const mkdeps *d = pfile->deps;
- column = 0;
+ unsigned column = 0;
if (colmax && colmax < 34)
colmax = 34;
- for (i = 0; i < d->ntargets; i++)
+ if (d->deps.size ())
{
- size = strlen (d->targetv[i]);
- column += size;
- if (colmax && column > colmax)
- {
- fputs (" \\\n ", fp);
- column = 1 + size;
- }
- if (i)
- {
- putc (' ', fp);
- column++;
- }
- fputs (d->targetv[i], fp);
+ column = make_write_vec (d->targets, fp, 0, colmax, d->quote_lwm);
+ if (CPP_OPTION (pfile, deps.modules) && d->cmi_name)
+ column = make_write_name (d->cmi_name, fp, column, colmax);
+ fputs (":", fp);
+ column++;
+ make_write_vec (d->deps, fp, column, colmax);
+ fputs ("\n", fp);
+ if (CPP_OPTION (pfile, deps.phony_targets))
+ for (unsigned i = 1; i < d->deps.size (); i++)
+ fprintf (fp, "%s:\n", munge (d->deps[i]));
}
- putc (':', fp);
- putc (' ', fp);
- column += 2;
+ if (!CPP_OPTION (pfile, deps.modules))
+ return;
+
+ if (d->modules.size ())
+ {
+ column = make_write_vec (d->targets, fp, 0, colmax, d->quote_lwm);
+ if (d->cmi_name)
+ column = make_write_name (d->cmi_name, fp, column, colmax);
+ fputs (":", fp);
+ column++;
+ column = make_write_vec (d->modules, fp, column, colmax, 0, ".c++m");
+ fputs ("\n", fp);
+ }
- for (i = 0; i < d->ndeps; i++)
+ if (d->module_name)
{
- size = strlen (d->depv[i]);
- column += size;
- if (colmax && column > colmax)
+ if (d->cmi_name)
{
- fputs (" \\\n ", fp);
- column = 1 + size;
+ /* module-name : cmi-name */
+ column = make_write_name (d->module_name, fp, 0, colmax,
+ true, ".c++m");
+ fputs (":", fp);
+ column++;
+ column = make_write_name (d->cmi_name, fp, column, colmax);
+ fputs ("\n", fp);
+
+ column = fprintf (fp, ".PHONY:");
+ column = make_write_name (d->module_name, fp, column, colmax,
+ true, ".c++m");
+ fputs ("\n", fp);
}
- if (i)
+
+ if (d->cmi_name && !d->is_header_unit)
{
- putc (' ', fp);
+ /* An order-only dependency.
+ cmi-name :| first-target
+ We can probably drop this this in favour of Make-4.3's grouped
+ targets '&:' */
+ column = make_write_name (d->cmi_name, fp, 0, colmax);
+ fputs (":|", fp);
column++;
+ column = make_write_name (d->targets[0], fp, column, colmax);
+ fputs ("\n", fp);
}
- fputs (d->depv[i], fp);
}
- putc ('\n', fp);
+
+ if (d->modules.size ())
+ {
+ column = fprintf (fp, "CXX_IMPORTS +=");
+ make_write_vec (d->modules, fp, column, colmax, 0, ".c++m");
+ fputs ("\n", fp);
+ }
}
+/* Write out dependencies according to the selected format (which is
+ only Make at the moment). */
+/* Really we should be opening fp here. */
+
void
-deps_phony_targets (const struct deps *d, FILE *fp)
+deps_write (const cpp_reader *pfile, FILE *fp, unsigned int colmax)
{
- unsigned int i;
-
- for (i = 1; i < d->ndeps; i++)
- {
- putc ('\n', fp);
- fputs (d->depv[i], fp);
- putc (':', fp);
- putc ('\n', fp);
- }
+ make_write (pfile, fp, colmax);
}
/* Write out a deps buffer to a file, in a form that can be read back
error number will be in errno. */
int
-deps_save (struct deps *deps, FILE *f)
+deps_save (class mkdeps *deps, FILE *f)
{
unsigned int i;
+ size_t size;
/* The cppreader structure contains makefile dependences. Write out this
structure. */
/* The number of dependences. */
- if (fwrite (&deps->ndeps, sizeof (deps->ndeps), 1, f) != 1)
- return -1;
+ size = deps->deps.size ();
+ if (fwrite (&size, sizeof (size), 1, f) != 1)
+ return -1;
+
/* The length of each dependence followed by the string. */
- for (i = 0; i < deps->ndeps; i++)
+ for (i = 0; i < deps->deps.size (); i++)
{
- size_t num_to_write = strlen (deps->depv[i]);
- if (fwrite (&num_to_write, sizeof (size_t), 1, f) != 1)
- return -1;
- if (fwrite (deps->depv[i], num_to_write, 1, f) != 1)
- return -1;
+ size = strlen (deps->deps[i]);
+ if (fwrite (&size, sizeof (size), 1, f) != 1)
+ return -1;
+ if (fwrite (deps->deps[i], size, 1, f) != 1)
+ return -1;
}
return 0;
}
/* Read back dependency information written with deps_save into
- the deps buffer. The third argument may be NULL, in which case
+ the deps sizefer. The third argument may be NULL, in which case
the dependency information is just skipped, or it may be a filename,
in which case that filename is skipped. */
int
-deps_restore (struct deps *deps, FILE *fd, const char *self)
+deps_restore (class mkdeps *deps, FILE *fd, const char *self)
{
- unsigned int i, count;
- size_t num_to_read;
- size_t buf_size = 512;
- char *buf = xmalloc (buf_size);
+ size_t size;
+ char *buf = NULL;
+ size_t buf_size = 0;
/* Number of dependences. */
- if (fread (&count, 1, sizeof (count), fd) != sizeof (count))
+ if (fread (&size, sizeof (size), 1, fd) != 1)
return -1;
/* The length of each dependence string, followed by the string. */
- for (i = 0; i < count; i++)
+ for (unsigned i = size; i--;)
{
/* Read in # bytes in string. */
- if (fread (&num_to_read, 1, sizeof (size_t), fd) != sizeof (size_t))
+ if (fread (&size, sizeof (size), 1, fd) != 1)
return -1;
- if (buf_size < num_to_read + 1)
+
+ if (size >= buf_size)
{
- buf_size = num_to_read + 1 + 127;
- buf = xrealloc (buf, buf_size);
+ buf_size = size + 512;
+ buf = XRESIZEVEC (char, buf, buf_size);
}
- if (fread (buf, 1, num_to_read, fd) != num_to_read)
- return -1;
- buf[num_to_read] = '\0';
+ if (fread (buf, 1, size, fd) != size)
+ {
+ XDELETEVEC (buf);
+ return -1;
+ }
+ buf[size] = 0;
/* Generate makefile dependencies from .pch if -nopch-deps. */
- if (self != NULL && strcmp (buf, self) != 0)
+ if (self != NULL && filename_cmp (buf, self) != 0)
deps_add_dep (deps, buf);
}
- free (buf);
+ XDELETEVEC (buf);
return 0;
}
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