progname: also set global program_invocation_name, when possible.

[pspp] / ChangeLog

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+2009-08-24  Jim Meyering  <meyering@redhat.com>
+
+       progname: also set global program_invocation_name, when possible
+       Before this change, a libtool-enabled program that calls glibc's
+       error function would report the program name as
+       "/abs/dir/.libs/lt-program_name" rather than the desired program_name.
+       * modules/progname (configure.ac): Check for a declaration of
+       program_invocation_name.
+       * lib/progname.c:  Include <errno.h>.
+       (set_program_name) [HAVE_DECL_PROGRAM_INVOCATION_NAME]:
+       Set program_invocation_name.
+
 2009-08-23  Bruno Haible  <bruno@clisp.org>
 
        * lib/dup3.c: Include <string.h>.