Move LIBS_SYSTEM from cpp to configure.

* configure.in (LIBS_SYSTEM): New output variable, replacing cpp.

* lib-src/Makefile.in (LIBS_SYSTEM) [!MSDOS]: Set with configure, not cpp.
(LIBS_SYSTEM) [MSDOS]: Use MSDOS_LIBS_SYSTEM.
(NOT_C_CODE): Remove, no longer used.
(config.h) [!MSDOS]: No longer include.
(LOADLIBES): Use LIBS_SYSTEM as a variable.

* src/Makefile.in (LIBS_SYSTEM): Set using configure, not cpp.
(LIBS_SYSTEM) [MSDOS]: Reset with MSDOS_LIBS_SYSTEM.
(LIBES): Use LIBS_SYSTEM as a variable.
* src/s/msdos.h (LIBS_SYSTEM): Rename to MSDOS_LIBS_SYSTEM.  Always define.
* src/s/aix4-2.h (LIBS_SYSTEM):
* src/s/freebsd.h (LIBS_SYSTEM):
* src/s/hpux10-20.h (LIBS_SYSTEM):
* src/s/sol2-6.h (LIBS_SYSTEM):
* src/s/unixware.h (LIBS_SYSTEM):
Move to configure.

* msdos/sed1v2.inp, msdos/sed3v2.inp (LIBS_SYSTEM): Edit to empty.

8 files changed, 26 insertions, 34 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index c0a264d46c9..c0e37f70c9c 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,16 @@
 2010-05-10  Glenn Morris  <rgm@gnu.org>
 
+        * Makefile.in (LIBS_SYSTEM): Set using configure, not cpp.
+        (LIBS_SYSTEM) [MSDOS]: Reset with MSDOS_LIBS_SYSTEM.
+        (LIBES): Use LIBS_SYSTEM as a variable.
+        * s/msdos.h (LIBS_SYSTEM): Rename to MSDOS_LIBS_SYSTEM.  Always define.
+        * s/aix4-2.h (LIBS_SYSTEM):
+        * s/freebsd.h (LIBS_SYSTEM):
+        * s/hpux10-20.h (LIBS_SYSTEM):
+        * s/sol2-6.h (LIBS_SYSTEM):
+        * s/unixware.h (LIBS_SYSTEM):
+        Move to configure.
+
         * s/aix4-2.h (MAIL_USE_LOCKF):
         * s/bsd-common.h (MAIL_USE_FLOCK):
         * s/darwin.h (MAIL_USE_FLOCK):
diff --git a/src/Makefile.in b/src/Makefile.in
index f956d03e337..69e37fb236a 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -88,6 +88,9 @@ LD_SWITCH_SYSTEM_EXTRA=@LD_SWITCH_SYSTEM_EXTRA@
 ## Flags to pass to ld only for temacs.
 TEMACS_LDFLAGS = $(LD_SWITCH_SYSTEM) $(LD_SWITCH_SYSTEM_EXTRA) $(LD_SWITCH_SYSTEM_TEMACS)
 
+## Some systems define this to request special libraries.
+LIBS_SYSTEM=@LIBS_SYSTEM@
+
 LIBTIFF=@LIBTIFF@
 LIBJPEG=@LIBJPEG@
 LIBPNG=@LIBPNG@
@@ -195,11 +198,6 @@ DEPFLAGS = -MMD -MF deps/$*.d
    do not let it interfere with this file.  */
 #undef register
 
-/* Some s/SYSTEM.h files define this to request special libraries.  */
-#ifndef LIBS_SYSTEM
-#define LIBS_SYSTEM
-#endif
-
 /* This macro is for switches specifically related to X Windows.  */
 #ifndef LD_SWITCH_X_SITE
 #define LD_SWITCH_X_SITE
@@ -324,9 +322,9 @@ LD=ld
 #endif
 
 #ifdef MSDOS
+LIBS_SYSTEM = MSDOS_LIBS_SYSTEM
 #ifdef HAVE_X_WINDOWS
 MSDOS_OBJ = dosfns.o msdos.o
-#define LIBS_SYSTEM -lxext -lsys
 #else
 MSDOS_OBJ = dosfns.o msdos.o w16select.o termcap.o
 #endif
@@ -656,8 +654,8 @@ SOME_MACHINE_LISP = ../lisp/mouse.elc \
    with GCC, we might need gnulib again after them.  */
 
 LIBES = $(LOADLIBES) $(LIBS) $(LIBX_BASE) $(LIBX_OTHER) $(LIBSOUND) \
-   $(RSVG_LIBS) $(DBUS_LIBS) @LIBGPM@ @LIBRESOLV@ LIBS_SYSTEM $(LIBS_TERMCAP) \
-   $(GETLOADAVG_LIBS) ${GCONF_LIBS} ${LIBSELINUX_LIBS} \
+   $(RSVG_LIBS) $(DBUS_LIBS) @LIBGPM@ @LIBRESOLV@ $(LIBS_SYSTEM) \
+   $(LIBS_TERMCAP) $(GETLOADAVG_LIBS) ${GCONF_LIBS} ${LIBSELINUX_LIBS} \
    @FREETYPE_LIBS@ @FONTCONFIG_LIBS@ @LIBOTF_LIBS@ @M17N_FLT_LIBS@ \
    $(GNULIB_VAR) @LIB_MATH@ @LIB_STANDARD@ $(GNULIB_VAR)
 
diff --git a/src/s/aix4-2.h b/src/s/aix4-2.h
index dc6ba71ab6f..8f506cb1822 100644
--- a/src/s/aix4-2.h
+++ b/src/s/aix4-2.h
@@ -87,15 +87,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #define LINKER cc
 #endif
 
-/* -lpthreads seems to be necessary for Xlib in X11R6, and should be harmless
-   on older versions of X where it happens to exist.  */
-#ifdef HAVE_LIBPTHREADS
-#define LIBS_SYSTEM -lrts -lIM -liconv -lpthreads
-#else
-/* IBM's X11R5 use -lIM and -liconv in AIX 3.2.2.  */
-#define LIBS_SYSTEM -lrts -lIM -liconv
-#endif
-
 /* The following definition seems to be needed in AIX version 3.1.6.8.
    It may not have been needed in certain earlier versions.  */
 #define HAVE_TCATTR
diff --git a/src/s/freebsd.h b/src/s/freebsd.h
index 50fdf65a1bc..78c7dfdf6bb 100644
--- a/src/s/freebsd.h
+++ b/src/s/freebsd.h
@@ -30,8 +30,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #define PENDING_OUTPUT_COUNT(FILE) ((FILE)->_p - (FILE)->_bf._base)
 
-#define LIBS_SYSTEM -lutil
-
 #undef LIB_GCC
 #define LIB_GCC
 
diff --git a/src/s/hpux10-20.h b/src/s/hpux10-20.h
index 8dc2f4d97df..0dc8276c44e 100644
--- a/src/s/hpux10-20.h
+++ b/src/s/hpux10-20.h
@@ -1,6 +1,7 @@
 /* System description file for hpux version 10.20.
-   Copyright (C) 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
-     2008, 2009, 2010  Free Software Foundation, Inc.
+
+Copyright (C) 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
+  2009, 2010  Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
@@ -126,13 +127,10 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 /* AlainF 20-Jul-1996 says this is right.  */
 #define KERNEL_FILE "/stand/vmunix"
 
-#define LIBS_SYSTEM -l:libdld.sl
-
 
 /* Rainer Malzbender <rainer@displaytech.com> says definining
    HAVE_XRMSETDATABASE allows Emacs to compile on HP-UX 10.20
    using GCC.  */
-
 #ifndef HAVE_XRMSETDATABASE
 #define HAVE_XRMSETDATABASE
 #endif
diff --git a/src/s/msdos.h b/src/s/msdos.h
index 5199799a226..a594bb850f4 100644
--- a/src/s/msdos.h
+++ b/src/s/msdos.h
@@ -1,7 +1,7 @@
 /* System description file for MS-DOS
 
-   Copyright (C) 1993, 1996, 1997, 2001, 2002, 2003, 2004, 2005, 2006,
-                 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+Copyright (C) 1993, 1996, 1997, 2001, 2002, 2003, 2004, 2005, 2006,
+  2007, 2008, 2009, 2010  Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
@@ -140,8 +140,9 @@ You lose; /* Emacs for DOS must be compiled with DJGPP */
    commentary below, in the non-X branch.  The 140KB number was
    measured on GNU/Linux and on MS-WIndows.  */
 #define SYSTEM_PURESIZE_EXTRA (-170000+140000)
-#define LIBS_SYSTEM -lxext -lsys
+#define MSDOS_LIBS_SYSTEM -lxext -lsys
 #else
+#define MSDOS_LIBS_SYSTEM
 /* We need a little extra space, see ../../lisp/loadup.el.
    As of 20091024, DOS-specific files use up 62KB of pure space.  But
    overall, we end up wasting 130KB of pure space, because
diff --git a/src/s/sol2-6.h b/src/s/sol2-6.h
index 78d2bfb3b6b..f9a4c44d74e 100644
--- a/src/s/sol2-6.h
+++ b/src/s/sol2-6.h
@@ -27,8 +27,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #define POSIX
 
-#define LIBS_SYSTEM -lsocket -lnsl -lkstat
-
 /* Prefer kstat over kvm in getloadavg.c, kstat doesn't require root.
    ghazi@caip.rutgers.edu, 7/21/97.  Don't redefine if already defined
    (e.g., by config.h). */
diff --git a/src/s/unixware.h b/src/s/unixware.h
index 6e42a0d4c56..31d7b25269a 100644
--- a/src/s/unixware.h
+++ b/src/s/unixware.h
@@ -1,7 +1,7 @@
 /* s/ file for Unixware.
 
-   Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
-                 2008, 2009, 2010  Free Software Foundation, Inc.
+Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
+  2008, 2009, 2010  Free Software Foundation, Inc.
 
 This file is part of GNU Emacs.
 
@@ -28,9 +28,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #undef HAVE_SYSV_SIGPAUSE
 
-/* Motif needs -lgen.  */
-#define LIBS_SYSTEM -lsocket -lnsl -lelf -lgen
-
 /* This is the same definition as in usg5-4.h, but with sigblock/sigunblock
    rather than sighold/sigrelse, which appear to be BSD4.1 specific.
    It may also be appropriate for SVR4.x