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domain {\tt dlmalloc} instead. This allocator could be easily integrated into our uspace tree
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domain {\tt dlmalloc} instead. This allocator could be easily integrated into our uspace tree
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and has proven itself in other projects as well. Its derivative, {\tt ptmalloc}, has been part of the
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and has proven itself in other projects as well. Its derivative, {\tt ptmalloc}, has been part of the
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GNU C library for some time. However, the version we are using is not optimized for SMP and multithreading.
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GNU C library for some time. However, the version we are using is not optimized for SMP and multithreading.
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We plan to eventually replace it with another allocator.
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We plan to eventually replace it with another allocator.
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Finally, the {\tt pci} userspace task is using the {\tt libpci} library. The
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library was simplified and ported to HelenOS. Even though filesystem
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calls were removed from the library, it still heavily depends on {\tt libc}.
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By porting {\tt libpci} to HelenOS, we demonstrated that applications and libraries
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are, given enough effort, portable to HelenOS.
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\section{Build tools}
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\section{Build tools}
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Assembler, linker and compiler are by all means the very focal point of attention
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Assembler, linker and compiler are by all means the very focal point of attention
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of all operating system projects. Quality of these tools influences
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of all operating system projects. Quality of these tools influences
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operating system performance and, what is more important, stability. HelenOS has
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operating system performance and, what is more important, stability. HelenOS has
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been tailored to build with GNU {\tt binutils} (i.e. the assembler and linker) and GNU~{\tt gcc}
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been tailored to build with GNU {\tt binutils} (i.e. the assembler and linker) and GNU~{\tt gcc}