Build: Add CONFIG_MIND_VOSCILLATOR_PERIOD_MS

configure.ac

@@ -6,6 +6,28 @@ AC_INIT([Harriman-Peikoff Project], [0.00.000],
 AC_CONFIG_SRCDIR([hcore/mind.cpp])
 AC_CONFIG_AUX_DIR([autotools-aux])
 
+# Set the mind's quantized virtual oscillator period in milliseconds.
+# Default value is 40 ms, user override via MIND_VOSCILLATOR_PERIOD_MS.
+# Check if MIND_VOSCILLATOR_PERIOD_MS is a valid positive integer
+AC_ARG_VAR([MIND_VOSCILLATOR_PERIOD_MS], m4_normalize([
+    Mind's virtual osc clock rate. Must be a positive integer, default value 40
+]))
+AS_IF([test -z "${MIND_VOSCILLATOR_PERIOD_MS}"], [MIND_VOSCILLATOR_PERIOD_MS=40])
+AS_IF([! test "${MIND_VOSCILLATOR_PERIOD_MS}" -eq "${MIND_VOSCILLATOR_PERIOD_MS}" 2>/dev/null ||
+    test "${MIND_VOSCILLATOR_PERIOD_MS}" -le 0 2>/dev/null], [
+    AC_MSG_ERROR([MIND_VOSCILLATOR_PERIOD_MS must be a positive integer > 0.])
+])
+
+AC_DEFINE_UNQUOTED([CONFIG_MIND_VOSCILLATOR_PERIOD_MS],
+    [${MIND_VOSCILLATOR_PERIOD_MS}],
+    [Period of the mind virtual oscillator in milliseconds])
+AC_COMPUTE_INT(
+    [MIND_VOSCILLATOR_FREQ_MS], [1000 / ${MIND_VOSCILLATOR_PERIOD_MS}], [],
+    [AC_MSG_ERROR([Failed to compute the mind's virtual oscillator frequency.])])
+AC_DEFINE_UNQUOTED([CONFIG_MIND_VOSCILLATOR_FREQ_MS],
+    [${MIND_VOSCILLATOR_FREQ_MS}],
+    [Frequency of the mind virtual oscillator in milliseconds])
+
 AM_INIT_AUTOMAKE([foreign -Wall -Werror])
 
 AC_PROG_CC
@@ -22,4 +44,11 @@ AC_CONFIG_FILES([
     Makefile hcore/Makefile
 ])
 
+AC_CONFIG_COMMANDS_POST([
+    AC_MSG_NOTICE([${PACKAGE_NAME} ${PACKAGE_VERSION} configuration:])
+    AC_MSG_NOTICE(m4_normalize([* MIND_VOSCILLATOR_PERIOD_MS:
+        ${MIND_VOSCILLATOR_PERIOD_MS} ms
+        (freq: ${MIND_VOSCILLATOR_FREQ_MS} Hz)]))
+])
+
 AC_OUTPUT