On quality: Manufacturers whose products include embedded systems will implement their algorithms in C but many (most?) will not use free implementations of C (compilers) for their deployed products. For safety critical applications with which I am familiar (automotive, aerospace and defense) manufacturers insist on compilers provided by commercial vendors. These vendors include Green Hills and Metaware as well as processor-specific vendors like Intel. Among these vendors, quality (in all its forms: reliability, performance, etc.) is paramount.
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On quality: Manufacturers whose products include embedded systems will implement their algorithms in C but many (most?) will not use free implementations of C (compilers) for their deployed products. For safety critical applications with which I am familiar (automotive, aerospace and defense) manufacturers insist on compilers provided by commercial vendors. These vendors include Green Hills and Metaware as well as processor-specific vendors like Intel. Among these vendors, quality (in all its forms: reliability, performance, etc.) is paramount.