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README.MacOS:
Rename to README.macOS.md.
Fix markdown in a few spots.
Add a missing word.
Describe the OS as "macOS", which is what Apple currently call it.
Fix up some links.
README.md:
Conform to the above change.
96 lines
3.2 KiB
Markdown
96 lines
3.2 KiB
Markdown
Mercury on macOS
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================
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This file documents the port of Mercury to macOS / OS X / Mac OS X
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(i.e. the `*-apple-darwin*` configuration).
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Versions of macOS prior to 10.9 are not supported.
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Contents
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--------
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* Mercury on Intel Macs
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* Note for users of Xcode 11
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* Deployment Target Settings
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* Deep profiling on macOS
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Mercury on Intel Macs
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----------------------
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Mercury should build and install "out-of-the-box" on Intel Macs using macOS
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10.9 onwards.
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The `asm_fast*` and `reg*` grades are only available on 64-bit Intel systems
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and only when using GCC version 4.3 or later as the C compiler.
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If `clang` is being used as the C compiler then the only low-level C grades
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available are the `none*` grades. The high-level C, Java and C# grades
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all work. The C# grades require the Mono .NET implementation.
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(See [README.CSharp.md](README.CSharp.md) for further details.)
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If the `asm_fast.gc` grade is not available, and unless otherwise directed,
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then the `hlc.gc` grade will be used as the default grade for compiling
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applications.
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On x86-64 machines, the default is to install 64-bit versions of the
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executables and libraries in the Mercury system. On machines running versions
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of macOS up to and including 10.14, users can choose to install 32-bit versions
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instead by invoking Mercury's `configure` script either with the option
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```
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--with-cc="clang -m32"
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```
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or
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```
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--with-cc="gcc -m32"
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```
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depending on their preferred compiler. In either case, every invocation
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of the selected C compiler on Mercury-generated C files will specify
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the `-m32` option. The reason for the limitation to 10.14 is that
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32-bit executables are not supported at all from macOS 10.15 onwards.
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If, after installing Mercury, you encounter errors about missing `.mih` files,
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and you have fink installed, then try removing the fink components from your
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`PATH` (these usually start with `/sw`) and reinstalling.
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Note for users of Xcode 11
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--------------------------
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Versions of Xcode 11 prior to 11.4 ship with a broken version of `clang`
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that *cannot* be used to compile Mercury. The `configure` script will print
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a warning if it detects that you are using the broken version.
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A discussion of this issue can be found at
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[this](<https://forums.developer.apple.com/thread/121887>) thread in the Apple
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Developer forum.
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This
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[post](https://github.com/Mercury-Language/mercury/issues/88#issuecomment-624329679)
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describes a way that has been found to fix the problem.
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Deployment Target Settings
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--------------------------
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By default, the Mercury compiler is configured so that the macOS deployment
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target for code generated by the Mercury compiler is set to the value of the
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`MACOSX_DEPLOYMENT_TARGET` environment variable (if set), or else to the macOS
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version of the host system.
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You can specify a different deployment target at configuration time using
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the `configure` script's `--with-macosx-deployment-target` option.
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(See the "SDK Compatibility Guide" in the Apple developer documentation
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for further information about the deployment target setting.)
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Deep profiling on macOS
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-----------------------
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The Mercury deep profiler requires a local web server. To use the deep
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profiler:
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- Select and install a web server, and
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- Install and enable the `mdprof_cgi` script according to the rules of that
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web server.
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