Use explicit version scripts to control symbol visibility

Unfortunately Nica is now very noisy and infects our symbol visibility,
so we'll now control exactly what symbols are exported in our .so's.

Signed-off-by: Ikey Doherty <ikey@solus-project.com>

src/intercept/meson.build

@@ -6,10 +6,13 @@ if with_libintercept == true
         'main.c',
     ]
 
+    sym_map = join_paths(meson.current_source_dir(), 'sym.map')
+
     main_intercept = shared_library(
         'lsi-intercept',
         sources: intercept_sources,
         c_args: ['-fvisibility=hidden'],
+        link_args: ['-Wl,--version-script=@0@'.format(sym_map)],
         include_directories: nica_includes,
         dependencies: [
             link_lsi_common,

src/intercept/sym.map

@@ -0,0 +1,7 @@
+{
+  global:
+    la_objsearch;
+    la_version;
+  local:
+    *;
+};

src/redirect/meson.build

@@ -11,10 +11,13 @@ if with_libredirect == true
         'profiles/ark.c',
     ]
 
+    sym_map = join_paths(meson.current_source_dir(), 'sym.map')
+
     main_redirect = shared_library(
         'lsi-redirect',
         sources: redirect_sources,
         c_args: ['-fvisibility=hidden'],
+        link_args: ['-Wl,--version-script=@0@'.format(sym_map)],
         include_directories: nica_includes,
         dependencies: [
             libdl,

src/redirect/sym.map

@@ -0,0 +1,6 @@
+{
+  global:
+    open;
+  local:
+    *;
+};