Fix fe_init implementation to appear for small Ed25519

configure.ac

@@ -1294,9 +1294,6 @@ then
 fi
 
 
-AM_CONDITIONAL([BUILD_CURVE25519], [test "x$ENABLED_CURVE25519" = "xyes"])
-AM_CONDITIONAL([BUILD_CURVE25519_SMALL], [test "x$ENABLED_CURVE25519_SMALL" = "xyes"])
-
 # ED25519
 AC_ARG_ENABLE([ed25519],
     [AS_HELP_STRING([--enable-ed25519],[Enable ED25519 (default: disabled)])],
@@ -1316,6 +1313,7 @@ then
     then
         AM_CFLAGS="$AM_CFLAGS -DED25519_SMALL"
         ENABLED_ED25519_SMALL=yes
+        ENABLED_CURVE25519_SMALL=yes
         ENABLED_ED25519=yes
     fi
 
@@ -1332,6 +1330,9 @@ AM_CONDITIONAL([BUILD_ED25519], [test "x$ENABLED_ED25519" = "xyes"])
 AM_CONDITIONAL([BUILD_ED25519_SMALL], [test "x$ENABLED_ED25519_SMALL" = "xyes"])
 AM_CONDITIONAL([BUILD_FEMATH],  [test "x$ENABLED_FEMATH" = "xyes"])
 AM_CONDITIONAL([BUILD_GEMATH],  [test "x$ENABLED_GEMATH" = "xyes"])
+AM_CONDITIONAL([BUILD_CURVE25519], [test "x$ENABLED_CURVE25519" = "xyes"])
+AM_CONDITIONAL([BUILD_CURVE25519_SMALL], [test "x$ENABLED_CURVE25519_SMALL" = "xyes"])
+
 
 # FP ECC, Fixed Point cache ECC
 AC_ARG_ENABLE([fpecc],

src/include.am

@@ -241,17 +241,11 @@ endif
 if BUILD_GEMATH
 if BUILD_ED25519_SMALL
 src_libwolfssl_la_SOURCES += wolfcrypt/src/ge_low_mem.c
-if !BUILD_CURVE25519_SMALL
-src_libwolfssl_la_SOURCES += wolfcrypt/src/fe_low_mem.c
-endif
 else
 src_libwolfssl_la_SOURCES += wolfcrypt/src/ge_operations.c
 if !BUILD_FEMATH
 src_libwolfssl_la_SOURCES += wolfcrypt/src/fe_operations.c
 endif
-if BUILD_CURVE25519_SMALL
-src_libwolfssl_la_SOURCES += wolfcrypt/src/fe_operations.c
-endif
 endif
 endif
 

wolfcrypt/src/fe_low_mem.c

@@ -55,14 +55,14 @@ void lm_copy(byte* x, const byte* a)
         x[i] = a[i];
 }
 
-
-#ifdef CURVE25519_SMALL
 #ifndef FREESCALE_LTC_ECC
 void fe_init()
 {
 }
 #endif
 
+#ifdef CURVE25519_SMALL
+
 /* Double an X-coordinate */
 static void xc_double(byte *x3, byte *z3,
 		      const byte *x1, const byte *z1)