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72 lines
1.7 KiB
Markdown
72 lines
1.7 KiB
Markdown
Mercury on AIX
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==============
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This file documents the port of Mercury to AIX.
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Mercury was tested on AIX in 2019 with the following configuration.
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* AIX 7.1 on POWER9.
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* GCC version 6.3.0.
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* High-level C grades (`hlc.gc`, `hlc.par.gc`).
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Prerequisites
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-------------
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Install `yum` by running this
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[script](https://public.dhe.ibm.com/aix/freeSoftware/aixtoolbox/ezinstall/ppc/yum.sh).
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Then install the necessary packages:
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```
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$ yum install gcc make flex bison
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```
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Building with GCC
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-----------------
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GCC defaults to `-maix32`. To build for the 64-bit AIX ABI, it may be easiest to
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create a shell script containing:
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```
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exec gcc -maix64 "$@"
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```
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Mark the script executable and then run `configure` like this:
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```
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$ CC=/path/to/gcc-maix64 ./configure [options]
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```
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If you are using `/usr/bin/ar` then you must also set an environment variable:
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```
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$ export OBJECT_MODE=64
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```
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If you try to use GNU `ar` instead (from binutils) you will run into problems
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when `/usr/bin/ranlib` is invoked on archives created by GNU `ar`.
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The `mercury_compile` executable will overflow the PowerPC TOC with `gcc` in its
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default configuration. One solution is to add this to `Mmake.params` before
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running `make`:
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```
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EXTRA_CFLAGS=-mminimal-toc
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```
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Your own programs may also overflow the TOC, depending on their size.
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Building with IBM XL C
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-----------------------
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(Last tested in 2014.)
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To use the IBM XL C compiler, pass `--with-cc=xlc` when configuring the Mercury
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installation. Use high-level C grades for better performance.
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Large programs will overflow the TOC. You can try passing the option
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`-qpic=large` to the C compiler and the linker, or passing `-bbigtoc` to the
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linker.
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-----------------------------------------------------------------------------
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