Linked by Thom Holwerda on Sat 29th Sep 2007 21:26 UTC, submitted by Chris Lattner
General Development The LLVM Project recently released a new version of their compiler, optimizer and code generators. LLVM includes a drop-in GCC-compatible C/C++ and ObjC compiler, mature optimization technology (including cross file/whole program optimization), and a highly optimizing code generator. For people who enjoy hacking on compilers and runtimes, LLVM provides libraries for implementing custom optimizers and code generators including JIT compiler support. This release is the first to provide beta GCC 4.2 compatibility as well as the new "clang" C/ObjC front-end, which provides capabilities to build source-to-source translators and many other tools.
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GCC
by saxiyn on Sun 30th Sep 2007 03:57 UTC
saxiyn
Member since:
2005-07-08

In my opinion, GCC has a near monopoly on the compiler market, and that's not healthy.

Case in point: Linux kernel makes liberal uses of GCC extensions, so other compilers are out of luck. Therefore Intel C Compiler implements all kinds of GCC extensions, and define __GNUC__! Exactly like Internet Explorer advertising itself as "Mozilla" in user-agent string. Same goes for glibc. glibc headers are broken if __GNUC__ is not defined. Just look at Tiny C Compiler development list for workaround they had to put up with to use glibc headers. (TCC refuses to define __GNUC__, but what a pain it causes.)

Other free software projects too often depend on non-standard features of GCC, effectively disadvantaging alternative compilers. But kernel and libc are the most serious offender.

I predict rough and difficult roads ahead of clang, not only for difficulty of implementing C language standard, but also for fighting free softwares that won't compile with anything other than GCC.

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