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26 lines
1.2 KiB
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26 lines
1.2 KiB
Plaintext
This file documents the port of Mercury to PowerPC Macs running MacOS X,
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i.e. the "powerpc-apple-darwin" configuration.
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The version of tar in /usr/bin/tar on MacOS (10.1) doesn't work properly --
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it truncates long path names. Make sure you use GNU tar, which is available
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in /sw/bin/gtar, when unpacking the Mercury source or binary distributions.
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(Also, make sure to use GNU tar if/when *building* such distributions!)
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Apple's version of gcc includes support for precompiled headers.
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Unfortunately this support seems to be somewhat buggy, causing it
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to sometimes crash with mysterious errors when building Mercury.
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Furthermore, for the kinds of C code that the Mercury compiler generates,
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it results in a very big slow-down, rather than any speedup.
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Fortunately this can be disabled by using the --traditional-cpp option.
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The Mercury configure script should enable this option automatically
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if it is needed.
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The configure script will by default choose grade reg.gc.
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You can get better performance by using the hlc.gc grade.
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The fast.gc and asm_fast.gc grades are not supported on PowerPC.
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The following features are not yet supported on MacOS:
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- shared libraries
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- interactive queries in mdb
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- the `--split-c-files' option to mmc
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