From c8cd042bdda8ad6711773df617d5296fc10056eb Mon Sep 17 00:00:00 2001
From: Daniel Pouzzner <douzzer@wolfssl.com>
Date: Fri, 4 Sep 2020 23:52:17 -0500
Subject: [PATCH] configure.ac: for linuxkm, make --enable-sp-math the default,
 and add additional exclusions --enable-fastrsa and --with-libz.

---
 configure.ac | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 6c58cb9a7..dea00633e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4633,10 +4633,16 @@ if test "$ENABLED_SP_ASM" = "yes"; then
   esac
 fi
 
+if test "$ENABLED_LINUXKM" = "yes" && test "$ENABLED_SP" != "no"
+then
+    ENABLED_SP_MATH_DEFAULT=yes
+else
+    ENABLED_SP_MATH_DEFAULT=no
+fi
 AC_ARG_ENABLE([sp-math],
     [AS_HELP_STRING([--enable-sp-math],[Enable Single Precision math implementation only (default: disabled)])],
     [ ENABLED_SP_MATH=$enableval ],
-    [ ENABLED_SP_MATH=no ],
+    [ ENABLED_SP_MATH=$ENABLED_SP_MATH_DEFAULT ],
     )
 if test "$ENABLED_SP_MATH" = "yes"; then
     if test "$ENABLED_SP" = "no"; then
@@ -5376,6 +5382,12 @@ if test "x$ENABLED_LINUXKM" = "xyes"; then
     if test "$ENABLED_FASTMATH" = "yes"; then
         AC_MSG_ERROR([--enable-fastmath is incompatible with --enable-linuxkm (exceeds stack limit).])
     fi
+    if test "$ENABLED_FAST_RSA" = "yes"; then
+        AC_MSG_ERROR([--enable-fastrsa is incompatible with --enable-linuxkm.])
+    fi
+    if test "$ENABLED_LIBZ_RSA" = "yes"; then
+        AC_MSG_ERROR([--with-libz is incompatible with --enable-linuxkm.])
+    fi
     if test "$ENABLED_IOPOOL" = "yes"; then
         AC_MSG_ERROR([--enable-iopool is incompatible with --enable-linuxkm.])
     fi