Bug#820150: zam-plugins: FTBFS[!linux]: Unsupported platform

[Steven Chamberlain <steven@pyro.eu.org>]

Package: zam-plugins
Version: 3.6~repack2-3
Severity: important
Tags: patch
User: debian-bsd@lists.debian.org
Usertags: kfreebsd

Hi,

zam-plugins stopped building on kfreebsd and hurd due to some
platform-detection code that doesn't know about GNU/kFreeBSD or Hurd.

I suggest it treats those as Linux because the macros don't enable
kernel-specific features anyway, just decide whether to include certain
headers.

Please see attached patch fixing this.  Thanks!

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: kfreebsd-amd64 (x86_64)

Kernel: kFreeBSD 10.1-0-amd64
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Date: Tue, 05 Apr 2016 21:37:17 +0100
From: Steven Chamberlain <steven@pyro.eu.org>
Subject: distrho: support GNU platforms other than Linux

Treat all glibc-based platforms as DISTRHO_OS_LINUX, even those not
based on Linux such as GNU/kFreeBSD or GNU/Hurd.

Also, wrap ifdefs around sa_restorer which really is specific to (some)
Linux platforms.  (A feature-test macro would be better, though it is
obsolete and maybe should be removed altogether...)

--- a/dpf/distrho/src/DistrhoDefines.h
+++ b/dpf/distrho/src/DistrhoDefines.h
@@ -37,7 +37,7 @@
 #  define DISTRHO_DLL_EXTENSION "dylib"
 # elif defined(__HAIKU__)
 #  define DISTRHO_OS_HAIKU      1
-# elif defined(__linux__)
+# elif defined(__linux__) || defined(__GLIBC__)
 #  define DISTRHO_OS_LINUX      1
 # endif
 #endif
--- a/dpf/distrho/src/DistrhoPluginJack.cpp
+++ b/dpf/distrho/src/DistrhoPluginJack.cpp
@@ -75,13 +75,17 @@
 
     sint.sa_handler  = closeSignalHandler;
     sint.sa_flags    = SA_RESTART;
+#if defined(__linux__)
     sint.sa_restorer = nullptr;
+#endif
     sigemptyset(&sint.sa_mask);
     sigaction(SIGINT, &sint, nullptr);
 
     sterm.sa_handler  = closeSignalHandler;
     sterm.sa_flags    = SA_RESTART;
+#if defined(__linux__)
     sterm.sa_restorer = nullptr;
+#endif
     sigemptyset(&sterm.sa_mask);
     sigaction(SIGTERM, &sterm, nullptr);
 }