[PATCH] modula-2: Module registration constructors need to be visible [PR108259].

[Iain Sandoe via Gcc-patches]

Tested on x86_64-linux-gnu, x86_64,aarch64-darwin21.
There remain issues with shared libraries, but the link fails are fixed
by this.

OK for master?
Thanks
Iain

--- 8< ---

In the current design the main executable links explicitly to the module
registration construtors that it uses.  This means that they must be
visible in shared libraries.

        PR modula2/108259

gcc/m2/ChangeLog:

        * gm2-gcc/m2decl.cc (m2decl_DeclareModuleCtor): Make module
        registration constructors visible.
---
 gcc/m2/gm2-gcc/m2decl.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/m2/gm2-gcc/m2decl.cc b/gcc/m2/gm2-gcc/m2decl.cc
index 62bfefd2530..d849f8aefc4 100644
--- a/gcc/m2/gm2-gcc/m2decl.cc
+++ b/gcc/m2/gm2-gcc/m2decl.cc
@@ -276,7 +276,7 @@ m2decl_DeclareModuleCtor (tree decl)
   /* Declare module_ctor ().  */
   TREE_PUBLIC (decl) = 1;
   DECL_ARTIFICIAL (decl) = 1;
-  DECL_VISIBILITY (decl) = VISIBILITY_HIDDEN;
+  DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
   DECL_VISIBILITY_SPECIFIED (decl) = 1;
   DECL_STATIC_CONSTRUCTOR (decl) = 1;
   return decl;
-- 
2.37.1 (Apple Git-137.1)