Build fails on OSX (the MSG_NOSIGNAL story)

[lpeterse]

host:dir user$ cabal install socket
Resolving dependencies...
Downloading socket-0.5.1.0...
Configuring socket-0.5.1.0...
Building socket-0.5.1.0...
Failed to install socket-0.5.1.0
Build log ( /Users/user/.cabal/logs/socket-0.5.1.0.log ):
[1 of 1] Compiling Main             ( /var/folders/ff/fr4w8j5n00975_hvxcqby4mw0000gn/T/socket-0.5.1.0-36289/socket-0.5.1.0/dist/setup/setup.hs, /var/folders/ff/fr4w8j5n00975_hvxcqby4mw0000gn/T/socket-0.5.1.0-36289/socket-0.5.1.0/dist/setup/Main.o )
Linking /var/folders/ff/fr4w8j5n00975_hvxcqby4mw0000gn/T/socket-0.5.1.0-36289/socket-0.5.1.0/dist/setup/setup ...
Configuring socket-0.5.1.0...
Building socket-0.5.1.0...
Preprocessing library socket-0.5.1.0...
Message.hsc:59:16: error: use of undeclared identifier 'MSG_NOSIGNAL'
    hsc_const (MSG_NOSIGNAL);
               ^
/usr/local/Cellar/ghc/7.8.3/lib/ghc-7.8.3/template-hsc.h:35:10: note: expanded from macro 'hsc_const'
    if ((x) < 0)                                      \
         ^
Message.hsc:59:16: error: use of undeclared identifier 'MSG_NOSIGNAL'
/usr/local/Cellar/ghc/7.8.3/lib/ghc-7.8.3/template-hsc.h:36:41: note: expanded from macro 'hsc_const'
        hsc_printf ("%lld", (long long)(x));          \
                                        ^
Message.hsc:59:16: error: use of undeclared identifier 'MSG_NOSIGNAL'
/usr/local/Cellar/ghc/7.8.3/lib/ghc-7.8.3/template-hsc.h:38:50: note: expanded from macro 'hsc_const'
        hsc_printf ("%llu", (unsigned long long)(x));
                                                 ^
3 errors generated.
compiling dist/build/System/Socket/Internal/Message_hsc_make.c failed (exit code 1)
command was: /usr/bin/gcc -c dist/build/System/Socket/Internal/Message_hsc_make.c -o dist/build/System/Socket/Internal/Message_hsc_make.o -m64 -fno-stack-protector -D__GLASGOW_HASKELL__=708 -Ddarwin_BUILD_OS=1 -Dx86_64_BUILD_ARCH=1 -Ddarwin_HOST_OS=1 -Dx86_64_HOST_ARCH=1 -Iplatform/linux/include -I/usr/local/Cellar/ghc/7.8.3/lib/ghc-7.8.3/bytestring-0.10.4.0/include -Idist/build/autogen -include dist/build/autogen/cabal_macros.h -Idist/build/autogen -include dist/build/autogen/cabal_macros.h -Idist/build/autogen -include dist/build/autogen/cabal_macros.h -I/usr/local/Cellar/ghc/7.8.3/lib/ghc-7.8.3/base-4.7.0.1/include -Idist/build/autogen -include dist/build/autogen/cabal_macros.h -I/usr/local/Cellar/ghc/7.8.3/lib/ghc-7.8.3/integer-gmp-0.5.1.0/include -Idist/build/autogen -include dist/build/autogen/cabal_macros.h -Idist/build/autogen -include dist/build/autogen/cabal_macros.h -I/usr/local/Cellar/ghc/7.8.3/lib/ghc-7.8.3/include -Idist/build/autogen -include dist/build/autogen/cabal_macros.h -I/usr/local/Cellar/ghc/7.8.3/lib/ghc-7.8.3/include/
cabal: Error: some packages failed to install:
socket-0.5.1.0 failed during the building phase. The exception was:
ExitFailure 1

Kudos to Michael Meinel and koex for pointing this out.

[lpeterse]

http://lists.apple.com/archives/macnetworkprog/2002/Dec/msg00091.html

[lpeterse]

MSG_NOSIGNAL is not portable although it's POSIX. WTF?

• OSX doesn't define it, but has a socket option SO_NOSIGPIPE.
• Solaris doesn't have a solution at all.
• Not sure about Windows/MinGW right now. It doesn't define MSG_NOSIGNAL.

Another issue:

• SCTP (lksctp) writes fail with EINVAL when using MSG_NOSIGNAL on Linux.

Here's the plan:

• Write tests for all this first: Are signals sent at all on the platform?
• #define MSG_NOSIGNAL 0 on all platforms that don't define it.
• Disable SIGPIPE via socket option if possible. Use MSG_NOSIGNAL as a fallback (if defined).
• Reliably let the tests fail on platforms that support neither (e.g. Solaris).

[lpeterse]

SIGPIPE does not exist at all on Windows: http://tangentsoft.net/wskfaq/articles/bsd-compatibility.html
Good for us.