--- scilab-2.7/configure.in	2003-02-06 02:42:05.000000000 -0500
+++ scilab-save/configure.in	2004-04-21 10:06:54.000000000 -0400
@@ -376,6 +376,55 @@ case "$host" in
     fi
     MAKEFILE_TARGET=Makefile.linux
    ;;
+# Linux x86_64 (added by Scott Robert Ladd)
+  x86_64-*-linux-gnu)
+    LIEEELIB=
+    AC_CHECK_LIB(ieee,main,
+      [LIEEELIB=-lieee])
+    MALLOC=malloc.o
+    GCC=yes
+    CC=gcc
+    CC_OPTIONS='-O -Dlinux -fwritable-strings'
+    CC_LDFLAGS=$LIEEELIB
+    # find Fortran compiler
+    # g77 already asked and found: good
+    if test "$WITH_G77" = yes; then
+      FC=g77
+    # option with-f2c
+    elif test "$with_f2c" = yes; then
+      AC_CHECK_PROG(F2C,f2c,yes,no)
+      if test "$F2C" = no; then
+        AC_MSG_ERROR([Unable to configure: f2c compiler not found])
+      fi
+      # script shell f77 have bugs, get ours
+      FC='${SCIDIR}/bin/f77-linux'
+    else
+      # first find g77
+      AC_CHECK_PROG(WITH_G77,g77,yes,no)
+      if test "$WITH_G77" = yes; then
+        FC=g77
+      else
+      # otherwise find f2c
+        AC_CHECK_PROG(F2C,f2c,yes,no)
+        if test "$F2C" = yes; then
+          # script shell f77 have bugs, get ours
+          FC='${SCIDIR}/bin/f77-linux'
+        else
+          AC_MSG_ERROR([Unable to configure: no Fortran compiler found])
+        fi
+      fi
+    fi
+    FC_OPTIONS=-O
+    FC_OPTIONS_O0=
+    FC_LDFLAGS="$LIEEELIB -ldl -rdynamic"
+    LD=ld
+    LD_LDFLAGS=$LIEEELIB
+    if test "$enable_debug" = yes; then
+      CC_OPTIONS='-g -Dlinux -fwritable-strings'
+      FC_OPTIONS=-g
+    fi
+    MAKEFILE_TARGET=Makefile.linux
+   ;;
 # SUN OS (NO LONGER SUPPORTED)
   sparc-*-sunos*)
     # standard compilers