network-3.1.2.5 not building on MacOS Big Sur

[goldfirere]

I can't seem to build network-3.1.2.5; the build hangs in the preprocessing stage. Here is my output:

rae:22:03:09 ~/temp/cab/network-3.1.2.5> cabal -v build
this build was affected by the following (project) config files:
Build profile: -w ghc-8.10.5 -O1
In order, the following will be built:
 - network-3.1.2.5 (lib:network) (first run)
creating /Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build
creating /Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/tmp
creating
/Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5
creating
/Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5/cache
Using self-exec internal setup method with build-type Configure and args:
["act-as-setup","--build-type=Configure","--","build","--verbose=2","--builddir=/Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5","lib:network"]
/Users/rae/.cabal/store/ghc-8.10.1/cbl-nstll-3.4.0.0-e668434b/bin/cabal
act-as-setup --build-type=Configure -- build --verbose=2
--builddir=/Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5
lib:network
Reading parameters from
/Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5/build/network.buildinfo
Component build order: library
/Users/rae/local/bin/ghc-pkg init /Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5/package.conf.inplace
creating
/Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5/build
creating
/Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5/build/autogen
creating
/Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5/build/autogen
Preprocessing library for network-3.1.2.5..
creating
/Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5/build/Network/Socket/ByteString
/Users/rae/local/bin/hsc2hs '@/Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5/build/Network/Socket/ByteString/hsc2hs-response64704-0.txt'
^Ccompiling /Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5/build/Network/Socket/ByteString/IO_hsc_make.c failed (exit code -2)
rsp file was: "/Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5/build/Network/Socket/ByteString/hsc2hscall64706-0.rsp"
command was: /Library/Developer/CommandLineTools/usr/bin/gcc -c /Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5/build/Network/Socket/ByteString/IO_hsc_make.c -o /Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5/build/Network/Socket/ByteString/IO_hsc_make.o -D__GLASGOW_HASKELL__=810 -Ddarwin_BUILD_OS=1 -Dx86_64_BUILD_ARCH=1 -Ddarwin_HOST_OS=1 -Dx86_64_HOST_ARCH=1 -Iinclude -I/Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5/build/include -I/Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5/build/autogen -I/Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5/build/global-autogen -include /Users/rae/Dropbox/work/temp/cab/network-3.1.2.5/dist-newstyle/build/x86_64-osx/ghc-8.10.5/network-3.1.2.5/build/autogen/cabal_macros.h -I/Users/rae/local/stow/ghc-8.10.5/lib/ghc-8.10.5/unix-2.7.2.2/include -I/Users/rae/local/stow/ghc-8.10.5/lib/ghc-8.10.5/time-1.9.3/include -I/Users/rae/local/stow/ghc-8.10.5/lib/ghc-8.10.5/bytestring-0.10.12.0/include -I/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -I/Users/rae/local/stow/ghc-8.10.5/lib/ghc-8.10.5/base-4.14.2.0/include -I/Users/rae/local/stow/ghc-8.10.5/lib/ghc-8.10.5/integer-gmp-1.0.3.0/include -I/Users/rae/local/stow/ghc-8.10.5/lib/ghc-8.10.5/include -I/Users/rae/local/stow/ghc-8.10.5/lib/ghc-8.10.5/include/
error: In file included from IO.hsc:5:
In file included from include/HsNet.h:37:
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/stdlib.h:134:25: warning: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Wnullability-completeness]
double   atof(const char *);
                         ^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/stdlib.h:134:25: note: insert '_Nullable' if the pointer may be null
double   atof(const char *);
                         ^
                          _Nullable
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/stdlib.h:134:25: note: insert '_Nonnull' if the pointer should never be null
double   atof(const char *);
                         ^
                          _Nonnull
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/stdlib.h:135:22: warning: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Wnullability-completeness]
int      atoi(const char *);
                         ^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/stdlib.h:135:22: note: insert '_Nullable' if the pointer may be null
int      atoi(const char *);
                         ^
                          _Nullable
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/stdlib.h:135:22: note: insert '_Nonnull' if the pointer should never be null
int      atoi(const char *);
                         ^
                          _Nonnull
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/stdlib.h:136:23: warning: pointer is missing a nullability type specifier (_Nonnull, _Nullable, or _Null_unspecified) [-Wnullability-completeness]
long     atol(const char *);
                         ^
/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/stdlib.h:136:23: note: insert '_Nullable' if the pointer may be null
long     atol(const char *);
                         ^
                          _Nullable
/Library/Developer/CommandLineT
rae:22:03:42 ~/temp/cab/network-3.1.2.5> 

Note the ^C about halfway down. The build hung (I waited maybe a minute, with no signs of life), and so I pressed Ctrl+C. Then, all the output we see afterwards appears.

I have no idea how to begin debugging this, but I'm happy to help by offering further information about my system if you have any questions.

[kazu-yamamoto]

Since I switched to Monterey, I don't have Big Sur anymore. But I am/was able to built network both on Monterey and BIg Sur.

[goldfirere]

Thanks, @kazu-yamamoto. Do you (or anyone else) have any suggestions for where I can look to learn more? I have no clue why this would hang. It appears that the hanging happens in hsc2hs, but I'm not sure.

[kazu-yamamoto]

I don't know why you are using /Library/Developer/CommandLineTools/usr/bin/gcc. I'm using /usr/bin/gcc. Do you install the right version of Xcode for your macOS?

FYI: If I remember correctly, I did xcode-select --install.

[goldfirere]

I've done xcode-select --install a number of times, along with various other well- and ill-advised things to get my machine working. I don't know why I had /Library/Developer/CommandLineTools/usr/bin in my PATH. I've fixed this, and now using /usr/bin/gcc, I get the same result. :(

Thanks for the suggestion!

[goldfirere]

This works on ghc-9.2.1. I have not tried other GHCs in the 8.10 series.

[goldfirere]

And it works for 8.10.7. Must have been some GHC/Mac strangeness. Closing.

Many thanks for the attempt to help, @kazu-yamamoto!