# Required for per-target flags or subdir-objects with C sources.
AM_PROG_CC_C_O
+# Set the standard the C library headers should conform to.
+AH_VERBATIM([_POSIX_C_SOURCE], [/* The targeted POSIX standard. */
+#ifndef _POSIX_C_SOURCE
+# define _POSIX_C_SOURCE 200112L
+#endif])
+
# Get compiler versions.
SR_PROG_VERSION([$CC], [sr_cc_version])
SR_PROG_VERSION([$CXX], [sr_cxx_version])