Shared libraries are built without SONAME

[yurivict]

Warning: /usr/ports/biology/ngs/work/stage/usr/local/lib/libngs-sdk.so.2.9.0 doesn't have a SONAME.

Every shared library in SDK normally should have SONAME.

[kwrodarmer]

I don't know how you built it, but our builds absolutely assign an SONAME:

$ objdump -p  libngs-sdk.so.2.9.0 | grep SONAME
  SONAME               libngs-sdk.so.2

[yurivict]

You use this line for SONAME:

   L($F, 'SONAME  = -install_name ' .
               '$(INST_LIBDIR)$(BITS)/$(subst $(VERSION),$(MAJVERS),$(@F)) \\');

and it doesn't work for some reason. It might be MacOS-specific.
Instead, the same line as for gcc works in clang on FreeBSD:

@@ -881,8 +895,7 @@ EndText
     L($F, "PIC     = $PIC") if ($PIC);
     if ($PKG{LNG} eq 'C') {
         if ($TOOLS =~ /clang/i) {
-   L($F, 'SONAME  = -install_name ' .
-               '$(INST_LIBDIR)$(BITS)/$(subst $(VERSION),$(MAJVERS),$(@F)) \\');
+   L($F, 'SONAME = -Wl,-soname=$(subst $(VERSION),$(MAJVERS),$(@F)) \\');
    L($F, '    -compatibility_version $(MAJMIN) -current_version $(VERSION) \\');
    L($F, '    -flat_namespace -undefined suppress');
         } else {

[kwrodarmer]

You are using a Mac build. As I said, our configuration isn't equipped to detect BSD, but if it did, it could use a slightly modified Linux build. Our default compiler on Linux is GCC, but we can substitute compilers. The CLANG makefile tends to be just like GCC in all ways but the tool name.