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64 lines
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<title>ESA/390 Notes - Using as</title>
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This file documents the GNU Assembler "as".
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Copyright (C) 1991-2015 Free Software Foundation, Inc.
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<a name="ESA%2f390-Notes"></a>
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<a name="ESA_002f390-Notes"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="ESA_002f390-Options.html#ESA_002f390-Options">ESA/390 Options</a>,
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Up: <a rel="up" accesskey="u" href="ESA_002f390_002dDependent.html#ESA_002f390_002dDependent">ESA/390-Dependent</a>
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<h4 class="subsection">9.14.1 Notes</h4>
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<p>The ESA/390 <code>as</code> port is currently intended to be a back-end
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for the <span class="sc">gnu</span> <span class="sc">cc</span> compiler. It is not HLASM compatible, although
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it does support a subset of some of the HLASM directives. The only
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supported binary file format is ELF; none of the usual MVS/VM/OE/USS
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object file formats, such as ESD or XSD, are supported.
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<p>When used with the <span class="sc">gnu</span> <span class="sc">cc</span> compiler, the ESA/390 <code>as</code>
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will produce correct, fully relocated, functional binaries, and has been
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used to compile and execute large projects. However, many aspects should
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still be considered experimental; these include shared library support,
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dynamically loadable objects, and any relocation other than the 31-bit
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relocation.
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</body></html>
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