Build issue on Virtualbox with Ubuntu 18.04 virtual machine

[phillipstanleymarbell]

Describe the bug
The newlib C library compilation process was looking for tools installed with the prefix riscv-unknown-elf-xyz whereas the tools built in the gcc and binutils build phases did not include unknown in the tool names.

To Reproduce
Steps to reproduce the behavior:

1. Clone ef8ca61
2. Configure based on README.md instructions (see diff below).

Expected behavior
Binutils, gcc, and newly should build cleanly.

Screenshots
N/A.

Host OS (please complete the following information):

• OS: Ubuntu 18.04 virtual machine.

You local changes (please complete the following information):

• Output of git diff

git diff
diff --git a/conf/setup.conf b/conf/setup.conf
index 80ff556..4408e16 100755
--- a/conf/setup.conf
+++ b/conf/setup.conf
@@ -1,19 +1,22 @@
##
## You will want to change the following to suit your setup:
##
-SUNFLOWERROOT = /usr/local/src/git/sunflower-simulator-github-clone
+
+
+
+SUNFLOWERROOT = /home/user/sunflower-simulator

OSTYPE = linux
MACHTYPE = i386
-TARGET = superH
+TARGET = riscv
TARGET-ARCH-FLAGS = -DM32
-TARGET-ARCH = sh-elf
+TARGET-ARCH = riscv32-elf
GMAKE = /usr/bin/make

#
# Specifies the architecture used. Uncomment for riscv builds.
#
-#ADDITIONAL_ARCH_FLAGS = --with-cpu=rv32i#fd
+ADDITIONAL_ARCH_FLAGS = --with-cpu=rv32i#fd

#
# On newer versions of macOS, you will need to install gcc

Additional context
The newlib C library compilation process was looking for tools installed with the prefix riscv-unknown-elf-xyz whereas the tools built in the gcc and binutils build phases did not include unknown in the tool names. Can remedy this by aliasing / creating symbolic links to what the C library compilation process needed in tools/bin and then re-run the last stage of the make cross process (i.e., make newlib).