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57 lines
1.7 KiB
Markdown
57 lines
1.7 KiB
Markdown
# Soft-FP sh3eb port of OpenLibm
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This is a fork of [OpenLibm](https://github.com/JuliaMath/openlibm) with
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support for the sh3eb architecture, intended for add-in programming on fx-9860G
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and fx-CG 50.
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## Installing with GiteaPC
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This library can be installed automatically with [GiteaPC](https://gitea.planet-casio.com/Lephenixnoir/GiteaPC).
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```
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% giteapc install Lephenixnoir/OpenLibm
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```
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## Building manually
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You will need a GCC toolchain built with `--target=sh3eb-elf`, such as the
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`sh-elf-gcc` commonly used on Planète Casio.
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First locate the compiler's install directory. This is normally the
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`lib/gcc/sh3eb-elf/<version>/` folder inside the install path of the compiler.
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```
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% PREFIX=$(sh-elf-gcc --print-search-dirs | grep install | sed 's/install: //')
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```
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You can then build and install the static `libopenlibm.a` archive and the headers.
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```
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% make USEGCC=1 TOOLPREFIX=sh-elf- AR=sh-elf-ar CC=sh-elf-gcc libdir="$PREFIX" includedir="$PREFIX/include" install-static install-headers
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```
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## Using in a Makefile-based add-in
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Link with `-lopenlibm` as you would do with `-lm`. Since OpenLibm headers
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reference themselves by file name (`#include <openlibm_complex.h>`) even though
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they are installed in a subfolder, you need a `-I` flag:
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```
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CFLAGS += -I $(shell sh-elf-gcc -print-file-name=include/openlibm)
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LDFLAGS += -lopenlibm
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```
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## Using in a CMake-based add-in
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When using CMake with the fxSDK, add the include folder and library like this.
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```
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target_include_directories(<TARGET> PRIVATE "${FXSDK_COMPILER_INSTALL}/include/openlibm")
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target_link_libraries(<TARGET> -lopenlibm)
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```
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## README and Licensing
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See the original README file in [README-OpenLibm.md](README-OpenLibm.md).
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OpenLibm contains code covered by various licenses, see
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[LICENSE.md](LICENSE.md).
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