Added compiler and newlib info for linux systems.

README.md

@@ -32,8 +32,14 @@ git submodule update --init --recursive
 
 mkdir ./build && cd ./build
 
-# Setup to build newlib.
-./configure --prefix=/usr/local/
+# Create needed dir for the output.
+mkdir /usr/local/riscv && chmod -R 0775 /usr/local/riscv
+
+# Setup to build newlib for 32bit embedded and compressed cpus.
+./configure --prefix=/usr/local/riscv --with-arch=rv32ec \
+    --with-arch=rv32ec \
+    --with-abi=ilp32e \
+    --with-multilib
 make -j4 newlib
 
 # Some Example options below.

riscv32-toolchain.cmake

@@ -41,6 +41,11 @@ if(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "FreeBSD")
 
 elseif(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Linux")
     message("OS:: LINUX")
+    set(NEWLIB /opt/riscv/riscv32-unknown-elf/include)
+    set(CMAKE_C_COMPILER riscv32-unknown-elf-gcc)
+    set(CMAKE_CXX_COMPILER riscv32-unknown-elf-g++)
+    set(CMAKE_C_STANDARD_COMPUTED_DEFAULT GNU)
+    set(CMAKE_CXX_STANDARD_COMPUTED_DEFAULT GNU)
 else()
     message("OS:: UNKNOWN?")
     message("Please add your OS details to the toolchain file.")