Changes between Version 43 and Version 44 of newport/bsp

Timestamp:

04/13/2022 09:50:28 PM (4 years ago)

Author:

Tim Harvey

Comment:

added cross-compile examples

newport/bsp

@@ -233 +233 @@
 https://github.com/Gateworks/openwrt/blob/20.06/target/linux/octeontx/image/Makefile
 
+
+
+
+[=#toolchain]
+== Toolchain
+
+=== Marvell toolchain
+The Newport BSP uses a Marvell toolchain to build the kernel and boot firmware based on gcc v7.3.0.
+
+The specific details can be shown by running 'gcc -v' for example:
+{{{#!bash
+user@host:/usr/src/newport/bsp$ . ./setup-environment # configure PATH and CROSS_COMPILER env vars
+user@host:/usr/src/newport/bsp$ ${CROSS_COMPILE}gcc -v
+Using built-in specs.
+COLLECT_GCC=aarch64-marvell-linux-gnu-gcc
+COLLECT_LTO_WRAPPER=/usr/src/newport/bsp/marvell-tools-238.0/bin/../libexec/gcc/aarch64-marvell-linux-gnu/7.3.0/lto-wrapper
+Target: aarch64-marvell-linux-gnu
+Configured with: /home/jenkins/workspace/BuildToolchainAARCH64_Marvell7/toolchain/scripts/../src/configure --disable-fixed-point --without-ppl --without-python --disable-werror --enable-plugins --with-lto-plugin-source=/home/jenkins/workspace/BuildToolchainAARCH64_Marvell7/toolchain/scripts/../gits/gcc/lto-plugin --with-system-zlib --enable-initfini-array --with-sysroot --with-local-prefix=/home/jenkins/workspace/BuildToolchainAARCH64_Marvell7/toolchain/scripts/../marvell-tools/aarch64-marvell-linux-gnu/sys-root --disable-sim --enable-symvers=gnu --enable-__cxa_atexit --enable-symvers=gnu --enable-__cxa_atexit --disable-sim --with-multilib-list=lp64,ilp32 --enable-gnu-indirect-function --target=aarch64-marvell-linux-gnu --enable-languages=c,c++,fortran --prefix=/home/jenkins/workspace/BuildToolchainAARCH64_Marvell7/toolchain/scripts/../marvell-tools --with-pkgversion='Marvell Inc. Version: Marvell GCC7 build 238.0' --with-bugurl=http://www.marvell.com/support/ --with-libexpat-prefix=/home/jenkins/workspace/BuildToolchainAARCH64_Marvell7/toolchain/scripts/../libs
+Thread model: posix
+gcc version 7.3.0 (Marvell Inc. Version: Marvell GCC7 build 238.0) 
+}}}
+
+The buildroot based toolchain is used by virtue of sourcing the [https://github.com/Gateworks/bsp-newport/blob/master/setup-environment setup-environment] file which adds to your PATH and sets the CROSS_COMPILE variable.
+
+=== Cross compile examples
+
+Examples of cross-compiling using the buildroot toolchain
+ * ANSI-C hello world:
+{{{#!bash
+cat << EOF > helloworld.c
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv)
+{
+        printf("hello world!\n");
+
+        return 0;
+}
+EOF
+. ./setup-environment # setup environment for buildroot toolchain
+${CROSS_COMPILE}gcc helloworld.c -o helloworld
+}}}
+ * C++ hello world:
+{{{#!bash
+cat << EOF > helloworld.cpp
+#include <iostream>
+
+using namespace std;
+
+int main() {
+        cout << "Hello World!";
+        return 0;
+}
+EOF
+. ./setup-environment # setup environment for buildroot toolchain
+${CROSS_COMPILE}gcc helloworld.cpp -lstdc++ -o helloworld
+}}}
+ * kernel module:
+{{{#!bash
+. ./setup-environment # setup environment for buildroot toolchain
+make kernel_image # first build the kernel
+make -C linux M=$PWD/my-module modules
+}}}
+  - Note that some out-of-tree kernel modules do not follow the suggested Makefile standards and may need to be modified to use the CROSS_COMPILE prefix and/or specify the kernel directory (as opposed to the above example where you do a make in the linux dir and set M to the path of your module)