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<p class="MsoNormal"><span style="font-size:12.0pt">Dear Cabal-ers<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">I have downloaded a binary installation of GHC 7.8.2, for Linux.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Now I want to install regex-compat. First I had to deal with the http_proxy problem, in my last email. But now I get this:<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">cabal install regex-compat<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">Resolving dependencies...<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">Downloading regex-posix-0.95.2...<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">Configuring regex-posix-0.95.2...<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">Building regex-posix-0.95.2...<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">Preprocessing library regex-posix-0.95.2...<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">[1 of 6] Compiling Text.Regex.Posix.Wrap ( dist/build/Text/Regex/Posix/Wrap.hs, dist/build/Text/Regex/Posix/Wrap.o )<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">[2 of 6] Compiling Text.Regex.Posix.String ( Text/Regex/Posix/String.hs, dist/build/Text/Regex/Posix/String.o )<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">[3 of 6] Compiling Text.Regex.Posix.Sequence ( Text/Regex/Posix/Sequence.hs, dist/build/Text/Regex/Posix/Sequence.o )<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">[4 of 6] Compiling Text.Regex.Posix.ByteString ( Text/Regex/Posix/ByteString.hs, dist/build/Text/Regex/Posix/ByteString.o )<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">[5 of 6] Compiling Text.Regex.Posix.ByteString.Lazy ( Text/Regex/Posix/ByteString/Lazy.hs, dist/build/Text/Regex/Posix/ByteString/Lazy.o )<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">[6 of 6] Compiling Text.Regex.Posix ( Text/Regex/Posix.hs, dist/build/Text/Regex/Posix.o )<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt;color:red">/usr/bin/ld: cannot find -lHSregex-base-0.93.2-ghc7.8.2<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt;color:red">/usr/bin/ld: cannot find -lHSmtl-2.1.2-ghc7.8.2<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">collect2: ld returned 1 exit status<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">Failed to install regex-posix-0.95.2<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">cabal: Error: some packages failed to install:<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">regex-compat-0.95.1 depends on regex-posix-0.95.2 which failed to install.<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">regex-posix-0.95.2 failed during the building phase. The exception was:<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">ExitFailure 1<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt"><o:p> </o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">simonpj@cam-05-unx:~/code/HEAD-1$ cabal install regex-base<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">Resolving dependencies...<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt;color:red">All the requested packages are already installed:<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt;color:red">regex-base-0.93.2<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">Use --reinstall if you want to reinstall anyway.<o:p></o:p></span></p>
<p class="Code"><span style="font-size:10.0pt">simonpj@cam-05-unx:~/code/HEAD-1$<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">So regex-base is already installed, but cabal isn’t using it for regex-posix; nor is it installing regex-base-0.93.2. This seems to break the user’s-eye view of the Cabal claim that it’ll download and install
the dependencies.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Any thoughts?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt">Simon<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:12.0pt"><o:p> </o:p></span></p>
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