Add VERILATOR_VERSION_INTEGER for determining API (#3343).

Changes

@@ -17,6 +17,7 @@ Verilator 4.219 devel
 * Removed the deprecated "fl" attribute in XML output; use "loc" attribute instead.
 * Suppress WIDTH warning on negate using carry bit (#3295). [Peter Monsson]
 * Add trace dumpvars() call for selective runtime tracing (#3322). [Shunyao CAD]
+* Add VERILATOR_VERSION_INTEGER for determining API (#3343). [Larry Doolittle]
 * Fix skipping public enum values with four-state values (#3303).
 * Fix $readmem file not found to be warning not error (#3310). [Alexander Grobman]
 * Fix class stringification on wide arrays (#3312). [Iru Cai]

configure.ac

@@ -22,6 +22,8 @@ AC_MSG_RESULT([configuring for $PACKAGE_STRING])
 PACKAGE_VERSION_NUMBER=`AS_ECHO("$PACKAGE_VERSION") | sed 's/ .*//g'`
 AC_SUBST(PACKAGE_VERSION_NUMBER)
 AC_DEFINE_UNQUOTED([PACKAGE_VERSION_NUMBER_STRING],["$PACKAGE_VERSION_NUMBER"],[Package version as a number])
+VERILATOR_VERSION_INTEGER=`AS_ECHO("$PACKAGE_VERSION") | [sed 's/\([0-9]\)\.\([0-9][0-9][0-9]\) .*/\1\2000/g']`
+AC_SUBST(VERILATOR_VERSION_INTEGER)
 
 # Ignore automake flags passed by Ubuntu builds
 AC_ARG_ENABLE([dependency-tracking],

include/verilated.h

@@ -33,6 +33,7 @@
 
 // clang-format off
 #include "verilatedos.h"
+#include "verilated_config.h"
 #if VM_SC
 # include "verilated_sc.h"  // Get SYSTEMC_VERSION and time declarations
 #endif

include/verilated_config.h.in

@@ -20,6 +20,11 @@
 // Autoconf substitutes this with the strings from AC_INIT.
 #define VERILATOR_PRODUCT "@PACKAGE_NAME@"
 
-/// Verilator version name, e.g. "1.000 2000-01-01"
+/// Verilator version name, e.g. "1.002 2000-01-01"
 // Autoconf substitutes this with the strings from AC_INIT.
 #define VERILATOR_VERSION "@PACKAGE_VERSION@"
+
+/// Verilator version number as integer
+/// As major * 100000 + minor * 1000, e.g. 1002000 == 1.002
+// Autoconf substitutes this with the strings from AC_INIT.
+#define VERILATOR_VERSION_INTEGER @VERILATOR_VERSION_INTEGER@

test_regress/t/t_wrapper_context.cpp

@@ -15,6 +15,11 @@
 
 #include VM_PREFIX_INCLUDE
 
+// Check we properly define the version integer
+#if VERILATOR_VERSION_INTEGER < 4219000  // Added in 4.219
+#error "VERILATOR_VERSION_INTEGER not set"
+#endif
+
 double sc_time_stamp() { return 0; }
 
 int errors = 0;