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41 lines
1.5 KiB
Plaintext
41 lines
1.5 KiB
Plaintext
The C library of the Genode OS Framework is based on the code of FreeBSD. The
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original code is available at the official FreeBSD website.
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:FreeBSD website: [http://www.freebsd.org]
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Currently, the libc supports the x86_32, x86_64 and ARM architectures. Support
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for other architectures is planned as future addition.
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Usage
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-----
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Before the libc is ready to use, the original FreeBSD source codes must be
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downloaded and integrated with the Genode build system. The tool 'prepare_port'
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automates this task. Please make sure to have Subversion installed. Then issue
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the following command:
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! ./tool/ports/prepare_port libc
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To use the libc in your application, add 'libc' to the 'LIBS' declaration in
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your build-description file. This declaration will make the libc headers
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available for the include path of your target and link the C library. When
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building, make sure that the 'libports' repository is included in your build
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configuration ('<build-dir>/etc/build.conf').
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Limitations
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-----------
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The current version of the C library is not entirely thread-safe.
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In particular, the 'FILE' stream API ('fopen', 'fread', ...) must not be
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used from multiple threads.
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The back end does not cover all features of FreeBSD. If an unsupported
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functions is called (see 'dummies.cc'), you will see an message in your debug
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output:
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! <function-name> called, not yet implemented!
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Some of the back-end functions implemented in the other files have
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dummy semantics but have to remain quiet because they are called from low-level
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libc code.
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