xfree86: build a shared lib identical to Xorg

Because we can use a shared lib in dlsym() for the symbol loader test,
but we can't use the executable.

v2: Drop a stray ' ' and rebase on 820a4cbe9f, by anholt

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Eric Anholt <eric@anholt.net>

hw/xfree86/drivers/modesetting/meson.build

@@ -28,7 +28,7 @@ shared_module(
 # Test that we don't have any unresolved symbols from our module to Xorg.
 xorg_build_root = join_paths(meson.build_root(), 'hw', 'xfree86')
 symbol_test_args = []
-symbol_test_args += join_paths(xorg_build_root, 'Xorg')
+symbol_test_args += join_paths(xorg_build_root, 'libxorgserver.so')
 symbol_test_args += join_paths(xorg_build_root, 'dixmods', 'libfb.so')
 symbol_test_args += join_paths(xorg_build_root, 'dixmods', 'libshadow.so')
 if build_glamor

hw/xfree86/loader/symbol-test.c

@@ -35,8 +35,7 @@ int main (int argc, char**argv)
 
     if (argc < 2) {
         fprintf(stderr,
-                "Must pass path of Xorg executable and any "
-                "modules to be loaded.\n");
+                "Must pass path any modules to be loaded.\n");
         exit(1);
     }
 

hw/xfree86/meson.build

@@ -92,12 +92,7 @@ if build_dri2
     xorg_link += xorg_dri2
 endif
 
-executable(
-    'Xorg',
-    srcs_xorg,
-    include_directories: [inc, xorg_inc],
-    link_whole: xorg_link,
-    dependencies: [
+xorg_deps = [
     pixman_dep,
     m_dep,
     dl_dep,
@@ -109,8 +104,29 @@ executable(
     xshmfence_dep,
     config_dep,
     libdrm_dep,
-    ],
+]
+
+executable(
+    'Xorg',
+    srcs_xorg,
+    include_directories: [inc, xorg_inc],
+    link_whole: xorg_link,
+    dependencies: xorg_deps,
     link_args: '-Wl,--export-dynamic',
     c_args: xorg_c_args,
     install: true,
 )
+
+# For symbol presence testing only
+xorgserver_lib = shared_library(
+    'xorgserver',
+    srcs_xorg,
+    include_directories: [inc, xorg_inc],
+    link_whole: xorg_link,
+    dependencies: xorg_deps,
+    link_args: '-Wl,--export-dynamic',
+    c_args: xorg_c_args,
+    install: false,
+)
+
+xorgserver_dep = declare_dependency(link_with: xorgserver_lib)