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<h3>
Marge Bot pushed to branch master
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
</h3>
<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/58ae62ebb5750e4dfbdb171efde8e3064b7afea8">58ae62eb</a></strong>
<div>
<span>by Matthias Andreas Benkard</span>
<i>at 2020-07-14T21:34:35-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">macOS: Load frameworks without stating them first.
macOS Big Sur makes the following change to how frameworks are shipped
with the OS:
> New in macOS Big Sur 11 beta, the system ships with a built-in
> dynamic linker cache of all system-provided libraries. As part of
> this change, copies of dynamic libraries are no longer present on
> the filesystem. Code that attempts to check for dynamic library
> presence by looking for a file at a path or enumerating a directory
> will fail. Instead, check for library presence by attempting to
> dlopen() the path, which will correctly check for the library in the
> cache. (62986286)
https://developer.apple.com/documentation/macos-release-notes/macos-big-sur-11-beta-release-notes/
Therefore, the previous method of checking whether a library exists
before attempting to load it makes GHC.Runtime.Linker.loadFramework
fail to find frameworks installed at /System/Library/Frameworks.
GHC.Runtime.Linker.loadFramework now opportunistically loads the
framework libraries without checking for their existence first,
failing only if all attempts to load a given framework from any of the
various possible locations fail.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/cdc4a6b0f71bbd16a11f23e455b28c0c15720b38">cdc4a6b0</a></strong>
<div>
<span>by Matthias Andreas Benkard</span>
<i>at 2020-07-14T21:34:35-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">loadFramework: Output the errors collected in all loading attempts.
With the recent change away from first finding and then loading a
framework, loadFramework had no way of communicating the real reason
why loadDLL failed if it was any reason other than the framework
missing from the file system. It now collects all loading attempt
errors into a list and concatenates them into a string to return to
the caller.
</pre>
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<h4>1 changed file:</h4>
<ul>
<li class="file-stats">
<a href="#3556223cd3ef45d787321b5290bf33535a361873">
compiler/GHC/Runtime/Linker.hs
</a>
</li>
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<h4>Changes:</h4>
<li id="3556223cd3ef45d787321b5290bf33535a361873">
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/c9f65c369a60467dcaf2b37d5f41f00565b4fe25...cdc4a6b0f71bbd16a11f23e455b28c0c15720b38#3556223cd3ef45d787321b5290bf33535a361873"><strong>compiler/GHC/Runtime/Linker.hs</strong></a>
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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1705,17 +1705,26 @@ loadFramework hsc_env extraPaths rootname</td>
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1705
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<pre style="margin: 0;"> <span id="LC1705" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Left</span> <span class="kr" style="font-weight: 600;">_</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>
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<pre style="margin: 0;"> <span id="LC1706" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Right</span> <span class="n" style="color: #333;">dir</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="n" style="color: #333;">dir</span> <span class="o" style="font-weight: 600;"></></span> <span class="s" style="color: #d14;">"Library/Frameworks"</span><span class="p">]</span></span>
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<pre style="margin: 0;"> <span id="LC1707" class="line" lang="haskell"> <span class="n" style="color: #333;">ps</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">extraPaths</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">homeFrameworkPath</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">defaultFrameworkPaths</span></span>
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<pre style="margin: 0;">-<span id="LC1708" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">mb_fwk</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">findFile</span> <span class="n" style="color: #333;">ps</span> <span class="n" style="color: #333;">fwk_file</span></span>
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<pre style="margin: 0;">-<span id="LC1709" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">mb_fwk</span> <span class="kr" style="font-weight: 600;">of</span></span>
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<pre style="margin: 0;">-<span id="LC1710" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">fwk_path</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">loadDLL</span> <span class="n" style="color: #333;">hsc_env</span> <span class="n" style="color: #333;">fwk_path</span></span>
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<pre style="margin: 0;">-<span id="LC1711" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="s" style="color: #d14;">"not found"</span><span class="p">)</span> <span class="p">}</span></span>
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<pre style="margin: 0;">-<span id="LC1712" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Tried all our known library paths, but dlopen()</span></span>
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<pre style="margin: 0;">-<span id="LC1713" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- has no built-in paths for frameworks: give up</span></span>
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<pre style="margin: 0;">+<span id="LC1708" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">errs</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">findLoadDLL</span> <span class="n" style="color: #333;">ps</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span></span>
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<pre style="margin: 0;">+<span id="LC1709" class="line" lang="haskell"> <span class="p">;</span> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="n" style="color: #333;">fmap</span> <span class="p">(</span><span class="n" style="color: #333;">intercalate</span> <span class="s" style="color: #d14;">", "</span><span class="p">)</span> <span class="n" style="color: #333;">errs</span></span>
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<pre style="margin: 0;">+<span id="LC1710" class="line" lang="haskell"> <span class="p">}</span></span>
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<pre style="margin: 0;"> <span id="LC1711" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">where</span></span>
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<pre style="margin: 0;"> <span id="LC1712" class="line" lang="haskell"> <span class="n" style="color: #333;">fwk_file</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">rootname</span> <span class="o" style="font-weight: 600;"><.></span> <span class="s" style="color: #d14;">"framework"</span> <span class="o" style="font-weight: 600;"></></span> <span class="n" style="color: #333;">rootname</span></span>
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<pre style="margin: 0;">-<span id="LC1716" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- sorry for the hardcoded paths, I hope they won't change anytime soon:</span></span>
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<pre style="margin: 0;">+<span id="LC1713" class="line" lang="haskell"></span>
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<pre style="margin: 0;">+<span id="LC1714" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- sorry for the hardcoded paths, I hope they won't change anytime soon:</span></span>
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<pre style="margin: 0;"> <span id="LC1715" class="line" lang="haskell"> <span class="n" style="color: #333;">defaultFrameworkPaths</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">[</span><span class="s" style="color: #d14;">"/Library/Frameworks"</span><span class="p">,</span> <span class="s" style="color: #d14;">"/System/Library/Frameworks"</span><span class="p">]</span></span>
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1718
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1716
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<pre style="margin: 0;"> <span id="LC1716" class="line" lang="haskell"></span>
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1717
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<pre style="margin: 0;">+<span id="LC1717" class="line" lang="haskell"> <span class="n" style="color: #333;">findLoadDLL</span> <span class="kt" style="color: #458; font-weight: 600;">[]</span> <span class="n" style="color: #333;">errs</span> <span class="o" style="font-weight: 600;">=</span></span>
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<td class="diff-line-num new new_line" data-linenumber="1718" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
1718
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<pre style="margin: 0;">+<span id="LC1718" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- Tried all our known library paths, but dlopen()</span></span>
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1719
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<pre style="margin: 0;">+<span id="LC1719" class="line" lang="haskell"> <span class="c1" style="color: #998; font-style: italic;">-- has no built-in paths for frameworks: give up</span></span>
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1720
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<pre style="margin: 0;">+<span id="LC1720" class="line" lang="haskell"> <span class="n" style="color: #333;">return</span> <span class="o" style="font-weight: 600;">$</span> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">errs</span></span>
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1721
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<pre style="margin: 0;">+<span id="LC1721" class="line" lang="haskell"> <span class="n" style="color: #333;">findLoadDLL</span> <span class="p">(</span><span class="n" style="color: #333;">p</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">ps</span><span class="p">)</span> <span class="n" style="color: #333;">errs</span> <span class="o" style="font-weight: 600;">=</span></span>
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1722
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<pre style="margin: 0;">+<span id="LC1722" class="line" lang="haskell"> <span class="kr" style="font-weight: 600;">do</span> <span class="p">{</span> <span class="n" style="color: #333;">dll</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">loadDLL</span> <span class="n" style="color: #333;">hsc_env</span> <span class="p">(</span><span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;"></></span> <span class="n" style="color: #333;">fwk_file</span><span class="p">)</span></span>
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1723
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<pre style="margin: 0;">+<span id="LC1723" class="line" lang="haskell"> <span class="p">;</span> <span class="kr" style="font-weight: 600;">case</span> <span class="n" style="color: #333;">dll</span> <span class="kr" style="font-weight: 600;">of</span></span>
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1724
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<pre style="margin: 0;">+<span id="LC1724" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">return</span> <span class="kt" style="color: #458; font-weight: 600;">Nothing</span></span>
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1725
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<pre style="margin: 0;">+<span id="LC1725" class="line" lang="haskell"> <span class="kt" style="color: #458; font-weight: 600;">Just</span> <span class="n" style="color: #333;">err</span> <span class="o" style="font-weight: 600;">-></span> <span class="n" style="color: #333;">findLoadDLL</span> <span class="n" style="color: #333;">ps</span> <span class="p">((</span><span class="n" style="color: #333;">p</span> <span class="o" style="font-weight: 600;">++</span> <span class="s" style="color: #d14;">": "</span> <span class="o" style="font-weight: 600;">++</span> <span class="n" style="color: #333;">err</span><span class="p">)</span><span class="o" style="font-weight: 600;">:</span><span class="n" style="color: #333;">errs</span><span class="p">)</span></span>
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1726
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<pre style="margin: 0;">+<span id="LC1726" class="line" lang="haskell"> <span class="p">}</span></span>
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1727
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<pre style="margin: 0;">+<span id="LC1727" class="line" lang="haskell"></span>
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1719
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1728
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<pre style="margin: 0;"> <span id="LC1728" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;">{- **********************************************************************</span></span>
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1720
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1729
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<pre style="margin: 0;"> <span id="LC1729" class="line" lang="haskell"></span>
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1721
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1730
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<pre style="margin: 0;"> <span id="LC1730" class="line" lang="haskell"><span class="cm" style="color: #998; font-style: italic;"> Helper functions</span></span>
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