Reorganisation of the source tree

Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.

The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level.  The build system now makes no
pretense at being multi-project, it is just the GHC build system.

No doubt this will break many things, and there will be a period of
instability while we fix the dependencies.  A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.

1 files changed, 399 insertions, 0 deletions

diff --git a/utils/lndir/lndir.c b/utils/lndir/lndir.c
new file mode 100644
index 0000000000..c65715e379
--- /dev/null
+++ b/utils/lndir/lndir.c
@@ -0,0 +1,399 @@
+/* $XConsortium: lndir.c /main/16 1996/09/28 16:16:40 rws $ */
+/* Create shadow link tree (after X11R4 script of the same name)
+   Mark Reinhold (mbr@lcs.mit.edu)/3 January 1990 */
+
+/* 
+Copyright (c) 1990,  X Consortium
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of the X Consortium shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from the X Consortium.
+
+*/
+
+/* From the original /bin/sh script:
+
+  Used to create a copy of the a directory tree that has links for all
+  non-directories (except those named RCS, SCCS or CVS.adm).  If you are
+  building the distribution on more than one machine, you should use
+  this technique.
+
+  If your master sources are located in /usr/local/src/X and you would like
+  your link tree to be in /usr/local/src/new-X, do the following:
+
+   	%  mkdir /usr/local/src/new-X
+	%  cd /usr/local/src/new-X
+   	%  lndir ../X
+*/
+
+#include "lndir-Xos.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <sys/param.h>
+#include <errno.h>
+
+#ifndef X_NOT_POSIX
+#include <dirent.h>
+#else
+#ifdef SYSV
+#include <dirent.h>
+#else
+#ifdef USG
+#include <dirent.h>
+#else
+#include <sys/dir.h>
+#ifndef dirent
+#define dirent direct
+#endif
+#endif
+#endif
+#endif
+#ifndef MAXPATHLEN
+#define MAXPATHLEN 2048
+#endif
+
+#ifdef __CYGWIN32__
+#include <sys/cygwin.h>
+#endif
+
+#if NeedVarargsPrototypes
+#include <stdarg.h>
+#endif
+
+#ifdef X_NOT_STDC_ENV
+extern int errno;
+#endif
+int silent = 0;			/* -silent */
+int ignore_links = 0;		/* -ignorelinks */
+
+char *rcurdir;
+char *curdir;
+
+int force=0;
+
+void
+quit (
+#if NeedVarargsPrototypes
+    int code, char * fmt, ...)
+#else
+    code, fmt, a1, a2, a3)
+    char *fmt;
+#endif
+{
+#if NeedVarargsPrototypes
+    va_list args;
+    va_start(args, fmt);
+    vfprintf (stderr, fmt, args);
+    va_end(args);
+#else
+    fprintf (stderr, fmt, a1, a2, a3);
+#endif
+    putc ('\n', stderr);
+    exit (code);
+}
+
+void
+quiterr (code, s)
+    char *s;
+{
+    perror (s);
+    exit (code);
+}
+
+void
+msg (
+#if NeedVarargsPrototypes
+    char * fmt, ...)
+#else
+    fmt, a1, a2, a3)
+    char *fmt;
+#endif
+{
+#if NeedVarargsPrototypes
+    va_list args;
+#endif
+    if (curdir) {
+	fprintf (stderr, "%s:\n", curdir);
+	curdir = 0;
+    }
+#if NeedVarargsPrototypes
+    va_start(args, fmt);
+    vfprintf (stderr, fmt, args);
+    va_end(args);
+#else
+    fprintf (stderr, fmt, a1, a2, a3);
+#endif
+    putc ('\n', stderr);
+}
+
+void
+mperror (s)
+    char *s;
+{
+    if (curdir) {
+	fprintf (stderr, "%s:\n", curdir);
+	curdir = 0;
+    }
+    perror (s);
+}
+
+
+int equivalent(lname, rname)
+    char *lname;
+    char *rname;
+{
+    char *s;
+
+    if (!strcmp(lname, rname))
+	return 1;
+    for (s = lname; *s && (s = strchr(s, '/')); s++) {
+	while (s[1] == '/')
+	    strcpy(s+1, s+2);
+    }
+    return !strcmp(lname, rname);
+}
+
+
+/* Recursively create symbolic links from the current directory to the "from"
+   directory.  Assumes that files described by fs and ts are directories. */
+
+dodir (fn, fs, ts, rel)
+char *fn;			/* name of "from" directory, either absolute or
+				   relative to cwd */
+struct stat *fs, *ts;		/* stats for the "from" directory and cwd */
+int rel;			/* if true, prepend "../" to fn before using */
+{
+    DIR *df;
+    struct dirent *dp;
+    char buf[MAXPATHLEN + 1], *p;
+    char symbuf[MAXPATHLEN + 1];
+    char basesym[MAXPATHLEN + 1];
+    struct stat sb, sc;
+    int n_dirs;
+    int symlen;
+    int basesymlen = -1;
+    char *ocurdir;
+
+    if ((fs->st_dev == ts->st_dev) && (fs->st_ino == ts->st_ino)) {
+	msg ("%s: From and to directories are identical!", fn);
+	return 1;
+    }
+
+    if (rel)
+	strcpy (buf, "../");
+    else
+	buf[0] = '\0';
+    strcat (buf, fn);
+    
+    if (!(df = opendir (buf))) {
+	msg ("%s: Cannot opendir", buf);
+	return 1;
+    }
+
+    p = buf + strlen (buf);
+    *p++ = '/';
+    n_dirs = fs->st_nlink;
+    while (dp = readdir (df)) {
+	if (dp->d_name[strlen(dp->d_name) - 1] == '~')
+	    continue;
+	if (dp->d_name[0] == '.' && dp->d_name[1] == '#') /* 'non-conflict files' left behind by CVS */
+	    continue;
+	strcpy (p, dp->d_name);
+
+	if (n_dirs > 0) {
+	    if (stat (buf, &sb) < 0) {
+		mperror (buf);
+		continue;
+	    }
+
+#ifdef S_ISDIR
+	    if(S_ISDIR(sb.st_mode))
+#else
+	    if (sb.st_mode & S_IFDIR) 
+#endif
+	    {
+		/* directory */
+#ifndef __CYGWIN32__   /* don't trust cygwin's n_dirs count */
+		n_dirs--;
+#endif
+		if (dp->d_name[0] == '.' &&
+		    (dp->d_name[1] == '\0' || (dp->d_name[1] == '.' &&
+					       dp->d_name[2] == '\0')))
+		    continue;
+		if (!strcmp (dp->d_name, "RCS"))
+		    continue;
+		if (!strcmp (dp->d_name, "SCCS"))
+		    continue;
+		if (!strcmp (dp->d_name, "CVS"))
+		    continue;
+		if (!strcmp (dp->d_name, ".svn"))
+		    continue;
+		if (!strcmp (dp->d_name, "_darcs"))
+		    continue;
+		if (!strcmp (dp->d_name, "CVS.adm"))
+		    continue;
+		ocurdir = rcurdir;
+		rcurdir = buf;
+		curdir = silent ? buf : (char *)0;
+		if (!silent)
+		    printf ("%s:\n", buf);
+		if ((stat (dp->d_name, &sc) < 0) && (errno == ENOENT)) {
+		    if (mkdir (dp->d_name, 0777) < 0 ||
+			stat (dp->d_name, &sc) < 0) {
+			mperror (dp->d_name);
+			curdir = rcurdir = ocurdir;
+			continue;
+		    }
+		}
+		if (readlink (dp->d_name, symbuf, sizeof(symbuf) - 1) >= 0) {
+		    msg ("%s: is a link instead of a directory", dp->d_name);
+		    curdir = rcurdir = ocurdir;
+		    continue;
+		}
+		if (chdir (dp->d_name) < 0) {
+		    mperror (dp->d_name);
+		    curdir = rcurdir = ocurdir;
+		    continue;
+		}
+		dodir (buf, &sb, &sc, (buf[0] != '/'));
+		if (chdir ("..") < 0)
+		    quiterr (1, "..");
+		curdir = rcurdir = ocurdir;
+		continue;
+	    }
+	}
+
+	/* non-directory */
+	symlen = readlink (dp->d_name, symbuf, sizeof(symbuf) - 1);
+	if (symlen >= 0)
+	    symbuf[symlen] = '\0';
+
+	/* The option to ignore links exists mostly because
+	   checking for them slows us down by 10-20%.
+	   But it is off by default because this really is a useful check. */
+	if (!ignore_links) {
+	    /* see if the file in the base tree was a symlink */
+	    basesymlen = readlink(buf, basesym, sizeof(basesym) - 1);
+	    if (basesymlen >= 0)
+		basesym[basesymlen] = '\0';
+	}
+
+	if (symlen >= 0) {
+	  if (!equivalent (basesymlen>=0 ? basesym : buf, symbuf)) {
+	    if (force) {
+	      unlink(dp->d_name);
+	      if (symlink (basesymlen>=0 ? basesym : buf, dp->d_name) < 0)
+		mperror (dp->d_name);
+	    } else {
+	      /* Link exists in new tree.  Print message if it doesn't match. */
+	      msg ("%s: %s", dp->d_name, symbuf);
+	    }
+	  }
+	} else {
+	  if (symlink (basesymlen>=0 ? basesym : buf, dp->d_name) < 0)
+	    mperror (dp->d_name);
+	}
+    }
+    
+    closedir (df);
+    return 0;
+}
+
+
+main (ac, av)
+int ac;
+char **av;
+{
+    char *prog_name = av[0];
+    char* tn;
+    struct stat fs, ts;
+#ifdef __CYGWIN32__
+    /*   
+    The lndir code assumes unix-style paths to work. cygwin
+    lets you get away with using dos'ish paths (e.g., "f:/oo")
+    in most contexts. Using them with 'lndir' will seriously
+    confuse the user though, so under-the-hood, we convert the
+    path into something POSIX-like.
+    */
+    static char fn[MAXPATHLEN+1];
+#else
+    char *fn;
+#endif
+
+    while (++av, --ac) {
+      if (strcmp(*av, "-silent") == 0)
+	  silent = 1;
+      else if (strcmp(*av, "-f") == 0)
+	  force = 1;
+      else if (strcmp(*av, "-ignorelinks") == 0)
+	  ignore_links = 1;
+      else if (strcmp(*av, "--") == 0) {
+	  ++av, --ac;
+	  break;
+      } else
+	  break;
+    }
+
+    if (ac < 1 || ac > 2)
+	quit (1, "usage: %s [-f] [-silent] [-ignorelinks] fromdir [todir]",
+	      prog_name);
+
+#ifdef __CYGWIN32__
+    cygwin_conv_to_full_posix_path(av[0], fn);
+#else
+    fn = av[0];
+#endif
+
+    if (ac == 2)
+	tn = av[1];
+    else
+	tn = ".";
+
+    /* to directory */
+    if (stat (tn, &ts) < 0) {
+      if (force && (tn[0] != '.' || tn[1] != '\0') ) {
+         mkdir(tn, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH );
+      } 
+      else {
+	quiterr (1, tn);
+#ifdef S_ISDIR
+        if (!(S_ISDIR(ts.st_mode)))
+#else
+        if (!(ts.st_mode & S_IFDIR))
+#endif
+	   quit (2, "%s: Not a directory", tn);
+      }
+    }
+    if (chdir (tn) < 0)
+	quiterr (1, tn);
+
+    /* from directory */
+    if (stat (fn, &fs) < 0)
+	quiterr (1, fn);
+#ifdef S_ISDIR
+    if (!(S_ISDIR(fs.st_mode)))
+#else
+    if (!(fs.st_mode & S_IFDIR))
+#endif
+	quit (2, "%s: Not a directory", fn);
+
+    exit (dodir (fn, &fs, &ts, 0));
+}