[tracker-miners/tracker-miners-2.1] build: Only require seccomp when the CPU architecture supports it

[Carlos Garnacho <carlosg src gnome org>]

commit d37337736f655e2627124749b4697e0e408df3e2
Author: Mart Raudsepp <leio gentoo org>
Date:   Fri Feb 15 21:11:29 2019 +0200

    build: Only require seccomp when the CPU architecture supports it
    
    (cherry-picked from b2d4b05a0c9e34b88aaf55b9f52497b07af8e862)

 meson.build | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index fd536f2e6..8b580cabb 100644
--- a/meson.build
+++ b/meson.build
@@ -256,7 +256,23 @@ endif
 # Check for libseccomp
 ##################################################################
 
-if not libseccomp.found() and host_machine.system() == 'linux'
+host_system = host_machine.system()
+host_cpu = host_machine.cpu()
+unsupported_cpus = [
+  'alpha',
+  'ia64',
+  'm68k',
+  'parisc',
+  'parisc64',
+  'sh4',
+  'sparc',
+  'sparc64',
+]
+system_supports_seccomp = host_system == 'linux'
+cpu_supports_seccomp = not unsupported_cpus.contains(host_cpu)
+seccomp_required = system_supports_seccomp and cpu_supports_seccomp
+
+if not libseccomp.found() and seccomp_required
   error('Libseccomp is mandatory for sandboxed metadata extraction')
 endif