This is a comparison of currently (early 2018) available C implementations targeting the STM8. The author is a SDCC user and developer, but tried to do an objective comparison here. This page might get updated as new information becomes available (i.e. In case there are changes between SDCC 3.7.0 RC1 and the final 3.7.0 release or when obtaining a current Raisonance evaluation license).

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There is also a similar, and a. Mtk usb serial port driver x86 vs x64 7. The Compilers There are currently multiple C implementations targeting the STM8: • Cosmic: The comparison uses the STM8 Free Special Edition 4.4.7, the current version as of end of January 2018. • SDCC: SDCC 3.7.0 from the end of February 2018. • Raisonance: RCSTM8 COMPILER 2.62.17.263, which is the current version as of end of February 2016. • IAR: The comparison uses the time-limited IAR 3.10.1.201 Embedded Workbench for STMicroelectronics STM8, which is the current version as of end of January 2018. There are two more: 'ST8CC' and 'SDCC for ST7, STM8'.

Neither has been included in the comparison. 'ST8CC' seems rather incomplete and does not run under current operating systems. 'SDCC for ST7, STM8' is an unmaintained fork of an old SDCC version. Standard Compliance The input language to be accepted by C compilers is defined by international standards, with the ANSI C89/ISO C90, ISO C99 and ISO C11 being the most important.

• C89: C was first standardized by ANSI in 1989, which (with minor fixes) became an ISO standard in 1990. This standard is usually referred to as ANSI C89 or ISO C90. • C95: In 1995, some minor new features were introduced, resulting in what is commonly called the ISO C95 standard. It never became popular, with most users moving directly from C89/C90 to C99. • C99: The 1999 ISO standard introduced major new features. The move from C89 to C99 was initially slow, with the ISO C99 standard slowly gaining ground over the years.

• C11: The latest standard is the 2011 ISO standard. Compilers vendors and C programmers moved to ISO C11 rather quickly. • EC++:Embedded C++ was an attempt to standardize a subset of C++ suitable for embedded devices, which never became really popular: 'To the best of my knowledge EC++ is dead (2004), and if it isn't it ought to be.' (Bjarne Stroustrup). No current compiler targeting the STM8 fully supports any of the standards. However all of the compilers at least support large subsets of some standards.