Add a mechanism for using autoconf to detect the quirks of Unix systems

rather than relying on the user to edit the Makefile.  Makefile.gtk
still works as well as it ever did, but now we get a Makefile.in alongside
it.  mkunxarc.sh now relies on autoconf and friends to build the configure
script for the Unix source distribution.

[originally from svn r5673]

README

@@ -42,11 +42,14 @@ For building on Windows:
 
 For building on Unix:
 
- - unix/Makefile.gtk is for Unix and GTK. If you don't have GTK, you
+ - unix/configure is for Unix and GTK. If you don't have GTK, you
    should still be able to build the command-line utilities (PSCP,
-   PSFTP, Plink, PuTTYgen) using this makefile. The makefile expects
-   you to change into the `unix' subdirectory, then run `make -f
-   Makefile.gtk'. Note that Unix PuTTY has mostly only been tested
+   PSFTP, Plink, PuTTYgen) using this script. To use it, change
+   into the `unix' subdirectory, run `./configure' and then `make'.
+ 
+ - unix/Makefile.gtk is for non-autoconfigured builds. This makefile
+   expects you to change into the `unix' subdirectory, then run `make
+   -f Makefile.gtk'. Note that Unix PuTTY has mostly only been tested
    on Linux so far; portability problems such as BSD-style ptys or
    different header file requirements are expected.
 

Recipe

@@ -18,6 +18,7 @@
 !makefile borland windows/Makefile.bor
 !makefile lcc windows/Makefile.lcc
 !makefile gtk unix/Makefile.gtk
+!makefile ac unix/Makefile.in
 !makefile mpw mac/Makefile.mpw
 !makefile osx macosx/Makefile
 # Source directories.

mkfiles.pl

@@ -212,7 +212,7 @@ sub mfval($) {
     # Returns true if the argument is a known makefile type. Otherwise,
     # prints a warning and returns false;
     if (grep { $type eq $_ }
-	("vc","vcproj","cygwin","borland","lcc","gtk","mpw","osx")) {
+	("vc","vcproj","cygwin","borland","lcc","gtk","ac","mpw","osx")) {
 	    return 1;
 	}
     warn "$.:unknown makefile type '$type'\n";
@@ -945,6 +945,64 @@ if (defined $makefiles{'gtk'}) {
     select STDOUT; close OUT;
 }
 
+if (defined $makefiles{'ac'}) {
+    $dirpfx = &dirpfx($makefiles{'ac'}, "/");
+
+    ##-- Unix/autoconf makefile
+    open OUT, ">$makefiles{'ac'}"; select OUT;
+    print
+    "# Makefile.in for $project_name under Unix with Autoconf.\n".
+    "#\n# This file was created by `mkfiles.pl' from the `Recipe' file.\n".
+    "# DO NOT EDIT THIS FILE DIRECTLY; edit Recipe or mkfiles.pl instead.\n";
+    # gcc command line option is -D not /D
+    ($_ = $help) =~ s/=\/D/=-D/gs;
+    print $_;
+    print
+    "\n".
+    "CC = \@CC\@\n".
+    "\n".
+    &splitline("CFLAGS = \@CFLAGS\@ \@CPPFLAGS\@ \@DEFS\@ \@GTK_CFLAGS\@ " .
+	       (join " ", map {"-I$dirpfx$_"} @srcdirs))."\n".
+    "XLDFLAGS = \@LDFLAGS\@ \@LIBS\@ \@GTK_LIBS\@\n".
+    "ULDFLAGS = \@LDFLAGS\@ \@LIBS\@\n".
+    "INSTALL=\@INSTALL\@\n",
+    "INSTALL_PROGRAM=\$(INSTALL)\n",
+    "INSTALL_DATA=\$(INSTALL)\n",
+    "prefix=\@prefix\@\n",
+    "exec_prefix=\@exec_prefix\@\n",
+    "bindir=\@bindir\@\n",
+    "mandir=\@mandir\@\n",
+    "man1dir=\$(mandir)/man1\n",
+    "\n".
+    $makefile_extra{'gtk'}->{'vars'} .
+    "\n".
+    ".SUFFIXES:\n".
+    "\n".
+    "\n".
+    "all: \@all_targets\@\n".
+    &splitline("all-cli:" . join "", map { " $_" } &progrealnames("U"))."\n".
+    &splitline("all-gtk:" . join "", map { " $_" } &progrealnames("X"))."\n";
+    print "\n";
+    foreach $p (&prognames("X:U")) {
+      ($prog, $type) = split ",", $p;
+      $objstr = &objects($p, "X.o", undef, undef);
+      print &splitline($prog . ": " . $objstr), "\n";
+      $libstr = &objects($p, undef, undef, "-lX");
+      print &splitline("\t\$(CC)" . $mw . " \$(${type}LDFLAGS) -o \$@ " .
+                       $objstr . " $libstr", 69), "\n\n";
+    }
+    foreach $d (&deps("X.o", undef, $dirpfx, "/", "gtk")) {
+      print &splitline(sprintf("%s: %s", $d->{obj}, join " ", @{$d->{deps}})),
+          "\n";
+      print &splitline("\t\$(CC) \$(COMPAT) \$(XFLAGS) \$(CFLAGS) -c $d->{deps}->[0]\n");
+    }
+    print "\n";
+    print $makefile_extra{'gtk'}->{'end'};
+    print "\nclean:\n".
+    "\trm -f *.o". (join "", map { " $_" } &progrealnames("X:U")) . "\n";
+    select STDOUT; close OUT;
+}
+
 if (defined $makefiles{'mpw'}) {
     ##-- MPW Makefile
     open OUT, ">$makefiles{'mpw'}"; select OUT;

mkunxarc.sh

@@ -28,6 +28,9 @@ esac
 
 perl mkfiles.pl
 (cd doc && make -s ${docver:+"$docver"})
+# Track down automake's copy of install-sh
+cp `aclocal --print-ac-dir | sed 's/aclocal$/automake/'`/install-sh unix/.
+(cd unix && autoreconf  && rm -rf aclocal.m4 autom4te.cache)
 
 relver=`cat LATEST.VER`
 arcname="putty$arcsuffix"

unix/configure.ac

@@ -0,0 +1,44 @@
+# To compile this into a configure script, you need:
+# * Autoconf 2.50 or newer
+# * Gtk (for $prefix/share/aclocal/gtk.m4)
+# * Automake (for aclocal)
+# If you've got them, running "autoreconf" should work.
+
+AC_INIT
+AC_CONFIG_FILES([Makefile])
+AC_CONFIG_HEADERS([uxconfig.h:uxconfig.in])
+
+AC_PROG_INSTALL
+AC_PROG_CC
+if test "X$GCC" = Xyes; then
+    CFLAGS="$CFLAGS -Wall -Werror"
+fi
+
+AM_PATH_GTK([1.2.0], [all_targets="all-cli all-gtk"], [all_targets="all-cli"])
+AC_SUBST([all_targets])
+
+AC_SEARCH_LIBS([socket], [xnet])
+
+AC_CHECK_FUNCS([getaddrinfo ptsname pututline setresuid strsignal])
+
+AC_OUTPUT
+
+AH_BOTTOM([
+/* Convert autoconf definitions to ones that PuTTY wants. */
+
+#ifndef HAVE_GETADDRINFO
+# define NO_IPV6
+#endif
+#ifndef HAVE_SETRESUID
+# define HAVE_NO_SETRESUID
+#endif
+#ifndef HAVE_STRSIGNAL
+# define HAVE_NO_STRSIGNAL
+#endif
+#ifndef HAVE_PUTUTLINE
+# define OMIT_UTMP
+#endif
+#ifndef HAVE_PTSNAME
+# define BSD_PTYS
+#endif
+])

unix/unix.h

@@ -1,6 +1,10 @@
 #ifndef PUTTY_UNIX_H
 #define PUTTY_UNIX_H
 
+#ifdef HAVE_CONFIG_H
+# include "uxconfig.h" /* Space to hide it from mkfiles.pl */
+#endif
+
 #include <stdio.h>		       /* for FILENAME_MAX */
 #include "charset.h"