This repo contains changes to OpenBLAS to allow it to cross compile for esp32 devices

OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version.

Please read the documentation on the OpenBLAS wiki pages: http://github.com/xianyi/OpenBLAS/wiki.

Building OpenBLAS requires the following to be installed:

• GNU Make
• ESP32 Toolchain https://docs.espressif.com/projects/esp-idf/en/latest/get-started/index.html#setup-toolchain

Set CC to point to the cross toolchains, and set HOSTCC to your host C compiler. The target must be specified explicitly when cross compiling.

Examples:

• On an x86 box, compile this library for ESP32:

  make ONLY_CBLAS=1 BINARY=32 CC=$XTENSA_ESP32_GCC HOSTCC=gcc TARGET=ESP32 CORE=ESP32

A debug version can be built using make DEBUG=1.

Use PREFIX= when invoking make, for example

make install PREFIX=your_installation_directory

The default installation directory is /opt/OpenBLAS.