diff -Nur DjVu3.orig/config/cc.sh DjVu3/config/cc.sh
--- DjVu3.orig/config/cc.sh	Tue Jan  9 18:29:22 2001
+++ DjVu3/config/cc.sh	Mon Jul  9 00:58:27 2001
@@ -46,7 +46,7 @@
 EGCS="egcs"
 if [ -z "$CC_SET" ]
 then
-  (echo '#include <stdio.h>';echo 'int main(void) {puts("Hello World\n");return 0;}')|testfile $temp.c
+  (echo '#include <stdio.h>';echo 'int main(void) {puts("Hello World\\n");return 0;}')|testfile $temp.c
   CCPIC_SET=""
   CCFLAGS=""
   CCSYMBOLIC=""
@@ -89,27 +89,6 @@
   fi
   CCFLAGS=`echo "${CCPIPE}" "${CCFLAGS}"`
   
-  CCMMX=""
-  m=`${uname} -m`
-  if [ "${m}" = i686 ]
-  then
-    echon "Chesking whether ${CC} -mpentiumpro and -mmx work ... "
-    if ( run $CC ${CCFLAGS} -mpentiumpro -c $temp.c) 
-    then
-      CCMMX="-mpentiumpro"
-      if ( run $CC ${CCFLAGS} ${CCMMX} -mmx -c $temp.c )
-      then
-        CCMMX="$CCMMX -mmx"
-        echo "yes, both work"
-      else
-        echo "just $CCMMX works"
-      fi
-    else
-      echo no
-    fi
-    CCFLAGS=`echo "${CCMMX}" "${CCFLAGS}"`
-  fi
-
   echon "Checking whether ${CC} is gcc ... "
   echo 'int main(void) { return __GNUC__;}' | testfile $temp.c
   CCOPT=""
@@ -120,19 +99,11 @@
     echo yes
     cc_is_gcc=yes
     CCWARN="-Wall"
-    echon "Checking whether ${CC} -O3 works ... "
-    if ( run $CC ${CCFLAGS} -O3 -c $temp.c )
-    then
-      echo yes
-      CCOPT="-O3"
-    else
-      echo no
-    fi
-    echon "Checking whether ${CC} -funroll-loops works ... "
-    if ( run $CC ${CCFLAGS} ${CCOPT} -funroll-loops -c $temp.c )
+    echon "Checking whether ${CC} ${OPT} works ... "
+    if ( run $CC ${CCFLAGS} ${OPT} -c $temp.c )
     then
       echo yes
-      CCUNROLL="-funroll-loops"
+      CCOPT="${OPT}"
     else
       echo no
     fi
--- DjVu3/config/ccpic.sh.orig	2001-01-09 18:29:22.000000000 +0100
+++ DjVu3/config/ccpic.sh	2021-03-28 17:10:41.502783064 +0200
@@ -48,7 +48,7 @@
 then
   CCSYMBOLIC=""
   CCPIC=""
-  (echo '#include <stdio.h>';echo 'int main(void) {puts("Hello World\n");return 0;}')|testfile $temp.c
+  (echo '#include <stdio.h>';echo 'int main(void) {puts("Hello World\\n");return 0;}')|testfile $temp.c
 
   echon "Checking ${CC} symbolic option ... "
   CCSYMBOLIC=""
diff -Nur DjVu3.orig/config/cxx.sh DjVu3/config/cxx.sh
--- DjVu3.orig/config/cxx.sh	Tue Jan  9 18:29:22 2001
+++ DjVu3/config/cxx.sh	Mon Jul  9 01:00:18 2001
@@ -94,19 +94,6 @@
   fi
   CXXFLAGS=`echo "${CXXPIPE}" "${CXXFLAGS}"`
 
-  CXXMMX=""
-  if [ `uname -m` = i686 ]
-  then
-    echon "Checking ${CXX} supports pentium optimizations ... "
-    check_compile_flags CXXMMX $temp.cpp "-mpentiumpro -mmx" "-mpentiumpro"
-    if [ -z "$CXXMMX" ] ; then
-      echo "none"
-    else
-      echo "$CXXMMX"
-      CXXFLAGS="${CXXMMX} ${CXXFLAGS}"
-    fi
-  fi
-
   echon "Checking whether ${CXX} is gcc ... "
   echo 'int main(void) { return __GNUG__;}' | testfile $temp.cpp
   CXXOPT=""
@@ -117,18 +104,10 @@
     echo yes
     cxx_is_gcc=yes
     CXXWARN="-Wall"
-    echon "Checking whether ${CXX} -O3 works ... "
-    if ( run $CXX ${CXXFLAGS} -O3 -c $temp.cpp ) ; then
-      echo yes
-      CXXOPT="-O3"
-    else
-      echo no
-    fi
-    echon "Checking whether ${CXX} -funroll-loops works ... "
-    if ( run $CXX ${CXXFLAGS} ${CXXOPT} -funroll-loops -c $temp.cpp )
-    then
+    echon "Checking whether ${CXX} ${OPTXX} works ... "
+    if ( run $CXX ${CXXFLAGS} ${OPTXX} -c $temp.cpp ) ; then
       echo yes
-      CXXUNROLL="-funroll-loops"
+      CXXOPT="${OPTXX}"
     else
       echo no
     fi
diff -Nur DjVu3.orig/configure DjVu3/configure
--- DjVu3.orig/configure	Thu Nov  9 21:15:05 2000
+++ DjVu3/configure	Mon Jul  9 00:56:09 2001
@@ -1,4 +1,4 @@
-#!/bin/ksh
+#!/bin/sh
 #C-
 #C- DjVuŽ Reference Library (v. 3.0)
 #C- 
@@ -88,18 +88,13 @@
    esac
 done
 
-if [ ! -d "$TOPSRCDIR/src/3rd-party/libjpeg" ] 
-then
-  without_jpeg=true
-fi
-
 if [ -z "$without_jpeg" ] 
 then
       C_DEFS=APPEND
       A_DEFS="$A_DEFS -DNEED_JPEG_DECODER"
       C_INCS=APPEND
-      A_INCS="$A_INCS -I./TOPDIR/src/3rd-party/libjpeg -I./TOPDIR/SRCDIR/src/3rd-party/libjpeg"
-      LIBJPEG='$(LIBPATH)/libdjpeg.a'
+      A_INCS="$A_INCS -I/usr/include"
+      LIBJPEG='-ljpeg'
 else
       LIBJPEG=""
 fi
@@ -141,21 +136,6 @@
 generate_makefile src/libdjvu++/Test
 generate_makefile src/djvutools/reference
 
-if [ -z "$without_jpeg" ] 
-then
-    ## This is the version with JPEG 
-    generate_makefile src/3rd-party/libjpeg
-    generate_main_makefile src/3rd-party/libjpeg src/libdjvu++ <<\EOF
-all: 
-	( cd src/3rd-party/libjpeg; $(MAKE) lib prog)
-	( cd src/libdjvu++; $(MAKE) lib )
-	( cd src/djvutools/reference; $(MAKE) prog )
-
-install:
-	echo Rule not supported...
-EOF
-
-else
     ## This is the regular version
     generate_main_makefile src/libdjvu++ <<\EOF
 all: 
@@ -165,7 +145,6 @@
 install:
 	echo Rule not supported...
 EOF
-fi