diff -Nrup a/acinclude.m4 b/acinclude.m4
--- a/acinclude.m4	2020-01-21 12:47:14.304469691 -0700
+++ b/acinclude.m4	2020-01-21 12:49:39.105035195 -0700
@@ -10337,7 +10337,7 @@ sympat='\([[_A-Za-z]][[_A-Za-z0-9]]*\)'
 symxfrm='\1 \2\3 \3'
 
 # Transform an extracted symbol line into a proper C declaration
-lt_cv_sys_global_symbol_to_cdecl="sed -n -e 's/^. .* \(.*\)$/extern int \1;/p'"
+lt_cv_sys_global_symbol_to_cdecl="sed -n -e 's/^T .* \(.*\)$/extern int \1();/p' -e 's/^$symcode* .* \(.*\)$/extern char \1;/p'"
 
 # Transform an extracted symbol line into symbol name and symbol address
 lt_cv_sys_global_symbol_to_c_name_address="sed -n -e 's/^: \([[^ ]]*\) $/  {\\\"\1\\\", (lt_ptr) 0},/p' -e 's/^$symcode \([[^ ]]*\) \([[^ ]]*\)$/  {\"\2\", (lt_ptr) \&\2},/p'"