ww: preserve command package identities

cmd/wcc/parse.c

@@ -1575,7 +1575,12 @@ parsefile(Parser *p)
 				    && strcmp(p->testmodule, "__wwtest") == 0
 				    && strcmp(active, "__wwtest") == 0
 				    && strcmp(name, "test") == 0;
-				if (strcmp(name, last) != 0 && !testsupport) {
+				int commandpackage = p->commandpackage
+				    && p->pathmod == NULL && p->resetmod != NULL
+				    && (strcmp(name, "main") == 0
+					|| strcmp(name, "main_test") == 0);
+				if (strcmp(name, last) != 0 && !testsupport
+				    && !commandpackage) {
 					errorf(p->cur.pos,
 					    "package %s does not match import path %s",
 					    name, active);

cmd/wcc/ww.h

@@ -381,6 +381,8 @@ struct Parser {
 				 * component) instead of overwriting curmod. */
 	const char *testmodule;	/* hidden package-driver alias for toolchain
 				 * `package test`; NULL outside that compile */
+	int	commandpackage; /* selected command family: package main/main_test
+				 * validates kind without replacing resetmod identity */
 };
 
 void	parserinit(Parser*, Arena*, Lex*);