Bug: linking shared libraries on Cygwin results in undefined references to __stack_chck_guard for code compiled with -fstack-protector

[Bart Van Assche]

This behavior has been observed with libtool version 2.2.6.

The patch below fixes this by passing -f flags to the linker:

Index: ltmain.sh
===================================================================
--- ltmain.sh
+++ ltmain.sh
@@ -4576,7 +4576,7 @@
        continue
        ;;

-      
-mt|-mthreads|-kthread|-Kthread|-pthread|-pthreads|--thread-safe|-threads)
+      
-mt|-mthreads|-kthread|-Kthread|-pthread|-pthreads|--thread-safe|-threads|-f*)
        compiler_flags="$compiler_flags $arg"
        func_append compile_command " $arg"
        func_append finalize_command " $arg"