diff --git a/README b/README
index 9fad2ca..0782818 100644
--- a/README
+++ b/README
@@ -53,16 +53,10 @@ old build system and doing something like
 
   mkdir -p build/debug-linux
   cd build/debug-linux
-  ../../util/configure.sh  '--host=i486-linux' '--build=i486-linux' '--front-end=x' '--host-gcc=gcc -m32' '--cflags=-fno-strict-aliasing -I/usr/X11R6/include -O0 -finline-functions -g -Wall' '--root=../..' '--host-file-format=glibc' '--sound=linux' '--syn68k-host=i486-linux-glibc'
+  ../../util/configure.sh  '--host=i486-linux' '--build=i486-linux' '--front-end=sdl' '--host-gcc=gcc -m32' '--cflags=-fno-strict-aliasing -I/usr/X11R6/include -O0 -finline-functions -g -Wall' '--root=../..' '--host-file-format=glibc' '--sound=sdl' '--syn68k-host=i486-linux-glibc'
   make
 
-However, you may find that you need to hand-edit Makefile and change the line
-
-BUILD_GCC = gcc
-
-to
-
-BUILD_GCC = gcc -m32
+The above works on Fedora 10 x86_64.
 
 In the past it was possible to cross-compile a version of Executor for
 Windows using mingw32.  So far that port hasn't been tried since
diff --git a/src/config/Makefile.in b/src/config/Makefile.in
index 0b5f6fc..db24735 100644
--- a/src/config/Makefile.in
+++ b/src/config/Makefile.in
@@ -59,7 +59,7 @@ HOST_LD = splosion
 
 # these are compilers for the host
 BUILD_CC = cc
-BUILD_GCC = gcc
+BUILD_GCC = gcc -m32
 
 ifobjc
 # currently, objc compilers are only used on NEXTSTEP builds.
diff --git a/src/config/os/cygwin32/win_time.c b/src/config/os/cygwin32/win_time.c
index 842a389..aefd807 100644
--- a/src/config/os/cygwin32/win_time.c
+++ b/src/config/os/cygwin32/win_time.c
@@ -19,10 +19,10 @@ PRIVATE uint64
 system_time_to_micro_time (const SYSTEMTIME *timep)
 {
   FILETIME file_time;
-  uint64 retval;
+  uint64_t retval;
 
   SystemTimeToFileTime (timep, &file_time);
-  retval = ((((uint64) file_time.dwHighDateTime) << 32) |
+  retval = ((((uint64_t) file_time.dwHighDateTime) << 32) |
 	    (uint32) file_time.dwLowDateTime) / 10;
   return retval;
 }
@@ -31,7 +31,7 @@ PRIVATE void
 gettimeofday (struct timeval *tvp, void *ignored)
 {
   SYSTEMTIME system_time, unix_epoch;
-  uint64 now_micro_time;
+  uint64_t now_micro_time;
 
   unix_epoch.wYear = 1970;
   unix_epoch.wMonth = 1;
diff --git a/src/config/os/linux/linux.h b/src/config/os/linux/linux.h
index 90e174d..69e8acd 100644
--- a/src/config/os/linux/linux.h
+++ b/src/config/os/linux/linux.h
@@ -68,7 +68,13 @@ extern void *mmap_permanent_memory (unsigned long amount_wanted);
 
 #define HAVE_MMAP
 
-#define CONFIG_OFFSET_P 0 /* don't normally use offset memory */
+/*
+ * In the bad old days we could allocate page 0 and use it and not have
+ * to offset memory.  These days that's rarely allowed, and machines are
+ * fast enough that it doesn't matter.
+ */
+
+#define CONFIG_OFFSET_P 1 /* don't normally use offset memory */
 
 
 extern int ROMlib_launch_native_app (int n_filenames, char **filenames);
diff --git a/src/emustubs.c b/src/emustubs.c
index 3c4101c..e7586eb 100644
--- a/src/emustubs.c
+++ b/src/emustubs.c
@@ -2811,7 +2811,7 @@ STUB (Microseconds)
 {
   unsigned long ms = msecs_elapsed ();
   EM_D0 = ms * 1000;
-  EM_A0 = ((uint64) ms * 1000) >> 32;
+  EM_A0 = ((uint64_t) ms * 1000) >> 32;
   RTS ();
 }
 
diff --git a/src/include/rsys/custom.h b/src/include/rsys/custom.h
index 1c93377..8c91ae9 100644
--- a/src/include/rsys/custom.h
+++ b/src/include/rsys/custom.h
@@ -50,9 +50,9 @@ header_t;
 
 typedef struct
 {
-  uint64 magic;
+  uint64_t magic;
   header_t headers[0];
-  uint8 filler[CUSTOM_BLOCK_SIZE - sizeof (uint64)];
+  uint8 filler[CUSTOM_BLOCK_SIZE - sizeof (uint64_t)];
 }
 custom_block_t;
 
diff --git a/src/include/rsys/soundopts.h b/src/include/rsys/soundopts.h
index 0d38414..795387d 100644
--- a/src/include/rsys/soundopts.h
+++ b/src/include/rsys/soundopts.h
@@ -44,7 +44,7 @@ extern void clear_pending_sounds (void);
 
 extern HIDDEN_SndChannelPtr allchans;
 
-typedef uint64 snd_time;
+typedef uint64_t snd_time;
 
 #define SND_PROMOTE(x) (((snd_time)x) << (4 * sizeof (snd_time)))
 #define SND_DEMOTE(x) (((snd_time)x) >> (4 * sizeof (snd_time)))
diff --git a/src/include/rsys/types.h b/src/include/rsys/types.h
index 6ea9ad4..33bc4a4 100644
--- a/src/include/rsys/types.h
+++ b/src/include/rsys/types.h
@@ -8,8 +8,6 @@ typedef unsigned short uint16;
 typedef signed short int16;
 typedef unsigned int uint32;
 typedef signed int int32;
-typedef signed long long int64;
-typedef unsigned long long uint64;
 
 #define INT_TYPES_TYPEDEFED
 #endif /* !INT_TYPES_TYPEDEFED */
diff --git a/src/interfacelib.c b/src/interfacelib.c
index 842f146..0d11bb1 100644
--- a/src/interfacelib.c
+++ b/src/interfacelib.c
@@ -2291,10 +2291,10 @@ CallUniversalProc_from_native (UniversalProcPtr proc, ProcInfoType info, ...)
 }
 
 PRIVATE void
-microseconds (uint64 *retp)
+microseconds (uint64_t *retp)
 {
   warning_trace_info (NULL_STRING);
-  *retp = (uint64) (uint32) msecs_elapsed () * 1000;
+  *retp = (uint64_t) (uint32) msecs_elapsed () * 1000;
 }
 
 PRIVATE void
diff --git a/util/configure.sh b/util/configure.sh
index 65f11ce..2253c8b 100755
--- a/util/configure.sh
+++ b/util/configure.sh
@@ -577,4 +577,9 @@ echo "${root}/util/configure.sh $arguments" >> config.status
 
 chmod +x config.status
 
+# If we're using this old configure script, then we're probably not dealing
+# with 64-bit machines.  The new build system constructs config.h for us.
+
+echo '#define SIZEOF_CHAR_P 4' > config.h
+
 echo "Executor is now configured for \`${host_arch}-${host_os}/${front_end}'."