diff --git a/src/config.in b/src/config.in
index e479029a70f..0cd0b54dd94 100644
--- a/src/config.in
+++ b/src/config.in
@@ -183,8 +183,11 @@ and this notice must be preserved on all copies.  */
 
 /* joe@zircon.uucp says that in order to use XFree386, you have to
    link against -lXbsd, which insists on defining the random
-   function.  */
-#ifdef HAVE_XFREE386
+   function.
+   faith@cs.unc.edu says this is bogus for Linux and several other OS's.
+   Eventually, we should have autoconf test for this.  Anyone want to
+   submit a patch?  */
+#if defined (HAVE_XFREE386) && !defined (LINUX)
 #define LIBX11_SYSTEM -lXbsd
 #define HAVE_RANDOM
 #endif
diff --git a/src/mem-limits.h b/src/mem-limits.h
index 06c8e1f5dd0..e2df73ee8d0 100644
--- a/src/mem-limits.h
+++ b/src/mem-limits.h
@@ -77,13 +77,20 @@ static void
 get_lim_data ()
 {
   extern long ulimit ();
-    
-#ifdef ULIMIT_BREAK_VALUE
-  lim_data = ULIMIT_BREAK_VALUE;
-#else
+
+  lim_data = -1;
+
+  /* Use the ulimit call, if we seem to have it.  */
+#if !defined (ULIMIT_BREAK_VALUE) || defined (LINUX)
   lim_data = ulimit (3, 0);
 #endif
 
+  /* If that didn't work, just use the macro's value.  */
+#ifdef ULIMIT_BREAK_VALUE
+  if (lim_data == -1)
+    lim_data = ULIMIT_BREAK_VALUE;
+#endif
+
   lim_data -= (long) data_space_start;
 }
 
diff --git a/src/process.c b/src/process.c
index 84a4dbd0c7e..2b2fc8304dc 100644
--- a/src/process.c
+++ b/src/process.c
@@ -110,7 +110,7 @@ static Lisp_Object stream_process;
 
 #ifndef VMS
 #ifndef WAITTYPE
-#if !defined (BSD) && !defined (UNIPLUS) && !defined (STRIDE) && !(defined (HPUX) && !defined (NOMULTIPLEJOBS)) && !defined (HAVE_WAIT_HEADER)
+#if (!defined (BSD) && !defined (UNIPLUS) && !defined (STRIDE) && !(defined (HPUX) && !defined (NOMULTIPLEJOBS)) && !defined (HAVE_WAIT_HEADER)) || defined (LINUX)
 #define WAITTYPE int
 #define WIFSTOPPED(w) ((w&0377) == 0177)
 #define WIFSIGNALED(w) ((w&0377) != 0177 && (w&~0377) == 0)
diff --git a/src/s/template.h b/src/s/template.h
index b7abe09e449..6460deab05b 100644
--- a/src/s/template.h
+++ b/src/s/template.h
@@ -79,16 +79,16 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 /*
  *	Define HAVE_TERMIOS if the system provides POSIX-style
  *	functions and macros for terminal control.
+ *
+ *	Define HAVE_TERMIO if the system provides sysV-style ioctls
+ *	for terminal control.
+ *
+ *	Do not define both.  HAVE_TERMIOS is prefered, if it is
+ *	supported on your system.
  */
 
 #define HAVE_TERMIOS
-
-/*
- *	Define HAVE_TERMIO if the system provides sysV-style ioctls
- *	for terminal control.
- */
-
-#define HAVE_TERMIO
+/* #define HAVE_TERMIO */
 
 /*
  *	Define HAVE_TIMEVAL if the system supports the BSD style clock values.
diff --git a/src/systty.h b/src/systty.h
index a7c682cf7c1..897a3c28e93 100644
--- a/src/systty.h
+++ b/src/systty.h
@@ -218,7 +218,7 @@ static struct sensemode {
 #ifdef HAVE_TERMIOS
 
 #define EMACS_GET_TTY_PGRP(fd, pgid) (*(pgid) = tcgetpgrp ((fd)))
-#define EMACS_SET_TTY_PGRP(fd, pgid) (*(pgid) = tcsetpgrp ((fd), *(pgid)))
+#define EMACS_SET_TTY_PGRP(fd, pgid) (tcsetpgrp ((fd), *(pgid)))
 
 #else
 #ifdef TIOCSPGRP
diff --git a/src/unexec.c b/src/unexec.c
index 2fb289d8fba..e8906fe68ad 100644
--- a/src/unexec.c
+++ b/src/unexec.c
@@ -235,7 +235,7 @@ static EXEC_HDR_TYPE hdr, ohdr;
 
 #else /* not HPUX */
 
-#if defined (USG) && !defined (IBMAIX) && !defined (IRIS) && !defined (COFF_ENCAPSULATE)
+#if defined (USG) && !defined (IBMAIX) && !defined (IRIS) && !defined (COFF_ENCAPSULATE) && !defined (LINUX)
 static struct bhdr hdr, ohdr;
 #define a_magic fmagic
 #define a_text tsize