A C standard library for sh3eb-elf.
Du kannst nicht mehr als 25 Themen auswählen Themen müssen mit entweder einem Buchstaben oder einer Ziffer beginnen. Sie können Bindestriche („-“) enthalten und bis zu 35 Zeichen lang sein.
Memallox b27b8de827 Add _console_read() implementation which is called by the read syscall (does not work yet!) vor 1 Jahr
config Sync with upstream gcc. vor 3 Jahren
etc Remove spurious empty line in changelog entry. vor 3 Jahren
include Sync with upstream gcc. vor 3 Jahren
libgloss [Aarch64] Syscalls: fix prototypes vor 1 Jahr
newlib Add _console_read() implementation which is called by the read syscall (does not work yet!) vor 1 Jahr
texinfo * texinfo/texinfo.tex: Update to version 2009-03-28.05. vor 10 Jahren
winsup Move common <sys/dirent.h> content to <dirent.h> vor 1 Jahr
.drone.yml Continuous Integration: Add Tea CI build configuration. vor 3 Jahren
.gitattributes Add .gitattributes vor 4 Jahren
.gitignore Add IDE-specific paths to .gitignore vor 1 Jahr
COPYING 2005-07-14 Kelley Cook <kcook@gcc.gnu.org> vor 14 Jahren
COPYING.LIB Sync toplevel with upstream GCC. vor 3 Jahren
COPYING.LIBGLOSS Add Synopsys license for newlib and libgloss vor 4 Jahren
COPYING.NEWLIB Update Arm entry in COPYING.NEWLIB. vor 1 Jahr
COPYING3 * COPYING3: New file. Contains version 3 of the GNU General Public License. vor 12 Jahren
COPYING3.LIB * COPYING3: New file. Contains version 3 of the GNU General Public License. vor 12 Jahren
ChangeLog Sync with upstream gcc. vor 3 Jahren
MAINTAINERS MAINTAINERS: clarify policy with config/ (and other top level files) vor 7 Jahren
Makefile.def Sync with upstream gcc. vor 3 Jahren
Makefile.in Introduce @unless/@endunless and postbootstrap Makefile targets vor 1 Jahr
Makefile.tpl Introduce @unless/@endunless and postbootstrap Makefile targets vor 1 Jahr
README 19990502 sourceware import vor 20 Jahren
README-maintainer-mode Cleanups after the update to Autoconf 2.64, Automake 1.11. vor 10 Jahren
README.md Add README.md vor 1 Jahr
compile Sync toplevel with upstream GCC. vor 3 Jahren
config-ml.in Sync toplevel with upstream GCC. vor 3 Jahren
config.guess Update config.guess and config.sub vor 1 Jahr
config.rpath Remove freebsd1 from libtool.m4 macros and config.rpath. vor 8 Jahren
config.sub Update config.guess and config.sub vor 1 Jahr
configure Introduce @unless/@endunless and postbootstrap Makefile targets vor 1 Jahr
configure.ac Introduce @unless/@endunless and postbootstrap Makefile targets vor 1 Jahr
depcomp Sync toplevel with upstream GCC. vor 3 Jahren
djunpack.bat * djunpack.bat: Use ".." quoting in Sed command, for the sake of vor 10 Jahren
install-sh Sync toplevel with upstream GCC. vor 3 Jahren
libtool.m4 Sync toplevel with upstream GCC. vor 3 Jahren
ltgcc.m4 * libtool.m4: Update to libtool 2.2.6. vor 11 Jahren
ltmain.sh PR target/59788 vor 5 Jahren
ltoptions.m4 Sync Libtool from GCC. vor 9 Jahren
ltsugar.m4 * libtool.m4: Update to libtool 2.2.6. vor 11 Jahren
ltversion.m4 Sync Libtool from GCC. vor 9 Jahren
lt~obsolete.m4 Sync Libtool from GCC. vor 9 Jahren
makefile.vms 19990502 sourceware import vor 20 Jahren
missing Sync toplevel with upstream GCC. vor 3 Jahren
mkdep * mkdep: New file. vor 20 Jahren
mkinstalldirs Sync toplevel with upstream GCC. vor 3 Jahren
move-if-change Sync toplevel with upstream GCC. vor 3 Jahren
setup.com 2009-09-01 Tristan Gingold <gingold@adacore.com> vor 10 Jahren
src-release * src-release (do-proto-toplevel): Support subdir-path-prefixed vor 6 Jahren
symlink-tree 2005-07-14 Kelley Cook <kcook@gcc.gnu.org> vor 14 Jahren
ylwrap Sync toplevel with upstream GCC. vor 3 Jahren

README.md

Newlib - a C Standard Library for Casio Calulators

Motivation

Until now there was no complete C standard library (aka libc) available for the Casio calculators. Although some parts of this library have been provided by fxlib and gint, there was no libc implementation complying with the standard and compatible with the sh3eb architecture ready to use.

To change that, I decided to port newlib to the Casio CPU. Newlib is an alternative libc implementation intended for use on embedded systems.

Alpha

Follow this link and click the download button in the top right corner:

v1.1

Installation

For a complete tutorial on how to setup a toolchain for Casio calculators, see Compiler sous Linux avec GCC.

To build newlib, you first need binutils and gcc for the target sh3eb-elf. Make sure to configure gcc with the arguments --with-newlib --without-headers.

Now you can install newlib. Simply call configure and make:

../newlib-cygwin/configure --target=sh3eb-elf --prefix=...
make
make install

Afterwards, you have to build gcc again with the argument --with-newlib.

For a more detailes tutorial about how to setup newlib in general, see this more detailed turorial.

Features for Casio fx9860g calculators:

  • C standard library libc
    • printf implementation to print text to the display
    • Dynamic allocation of memory using malloc and free
    • Memory manipulation using memcpy, memcmp, memset etc.
    • String manipulation using strcpy, strcmp, strstr, strtok
  • Math library libm
    • Floating point arithmetics
  • Automatic library and include path recognition after installation
  • Basic Casio features:
    • implementation of GetKey, Bdisp_AllClr_DDVRAM, Bdisp_PutDisp_DD, Print and locate without fxlib (but you can use it if you want)

Further information

Upstream Repository

Newlib provides releases in their ftp directory and their code on their git repository. I try to rebase my fork regulary to their master branch to keep it up-to-date.

The target sh3eb-elf

There is a great explanation on the naming convention of targets. To really understand what sh3eb-elf means, I’ll boil it down for you:

To compile code for our Casio calulator, we need to tell newlib where we want to run the code. In our case, the target’s name is sh3eb-elf.

sh is here short for the SuperH processor architecture. (Fortunately, newlib supports SuperH the by default.)

To be more specific, sh3 is a 32-bit CPU architecture of the SuperH family. Furthermore, eb stands for the big endian format (that indicates the byte order used for multi-byte variables). Usually a target also indicates a vendor which in this case is unknown. Lastly, the end of the target’s name is elf (which is usually the kernel). Here, we have no kernel (and hence no operating system) at all.

For newlib, the target sh3eb had to be specifically added.