POSIX compatible dprintf() function: print formatted output to a file
descriptor
+Comment:
+This module should not be used as a dependency from a test module,
+otherwise when this module occurs as a tests-related module, it will
+have side effects on the compilation of the 'vasnprintf' module, if
+that module occurs among the main modules in lib/.
+
Files:
m4/dprintf-posix.m4
m4/printf.m4