[gssdp/wip/meson: 7/17] meson: Port compile tests

[Jens Georg <jensgeorg src gnome org>]

commit 1856b60593bd5621a2b0eba6d6128f8f222b75fb
Author: Jens Georg <mail jensge org>
Date:   Fri Oct 26 16:43:40 2018 +0200

    meson: Port compile tests

 libgssdp/meson.build |  7 +++++++
 meson.build          | 41 ++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 47 insertions(+), 1 deletion(-)
---
diff --git a/libgssdp/meson.build b/libgssdp/meson.build
index 4e6cdd8..779ec16 100644
--- a/libgssdp/meson.build
+++ b/libgssdp/meson.build
@@ -29,6 +29,13 @@ sources = introspection_sources + [
     'gssdp-socket-functions.h'
     ]
 
+if pktinfo_available
+  sources += [
+    'gssdp-pktinfo-message.c',
+    'gssdp-pktinfo-message.h'
+    ]
+endif
+
 if host_machine.system() == 'windows'
   sources += 'gssdp-net-win32.c'
 endif
diff --git a/meson.build b/meson.build
index c8563b1..7c9d3d3 100644
--- a/meson.build
+++ b/meson.build
@@ -8,13 +8,52 @@ as_major_version = ver_arr[0]
 as_minor_version = ver_arr[1]
 as_micro_version = ver_arr[2]
 
+cc = meson.get_compiler('c')
+
 conf = configuration_data()
 conf.set('VERSION', '"@0@"'.format(meson.project_version()))
+
+# Check for struct in_pktinfo
+pktinfo_test = '''#include <netinet/ip.h>
+struct in_pktinfo pktinfo;
+'''
+
+pktinfo_available = cc.compiles(pktinfo_test,
+                                name : 'struct in_pktinfo is available')
+if pktinfo_available
+  conf.set('HAVE_PKTINFO', '1')
+endif
+
+# Check for if_nametoindex
+if_nametoindex_test = '''#include <net/if.h>
+int main(int argc, char *argv[]) {
+  (void) argc;
+  (void) argv;
+  if_nametoindex("lo");
+  return 0;
+}
+'''
+
+ifnametoindex_available = cc.compiles(if_nametoindex_test,
+                                      name : 'if_nametoindex is available')
+if ifnametoindex_available
+  conf.set('HAVE_IFNAMETOINDEX', '1')
+endif
+
+# Check for SIOCGIFINDEX
+siocgifindex_test = '''#include <sys/ioctl.h>
+static const int foo = SIOCGIFINDEX;
+'''
+siocgifindex_available = cc.compiles(siocgifindex_test,
+                                     name : 'SIOCGIFINDEX is available')
+if siocgifindex_available
+  conf.set('HAVE_SIOCGIFINDEX', '1')
+endif
+
 configure_file(output : 'config.h', configuration : conf)
 
 add_global_arguments('-DHAVE_CONFIG_H=1', language : 'c')
 
-cc = meson.get_compiler('c')
 system_deps = []
 
 # Check whether we are compiling against Android libc