guard tag against empty type (#908)

grisumbras · pdimov · commit 40c6b1adbac6 · 2024-06-17T19:48:00.000+03:00
diff --git a/boostcpp.jam b/boostcpp.jam
@@ -185,7 +185,7 @@ else
 
 rule tag ( name : type ? : property-set )
 {
-    if $(type) in STATIC_LIB SHARED_LIB IMPORT_LIB
+    if $(type:E=x) in STATIC_LIB SHARED_LIB IMPORT_LIB
     {
         local args = $(.format-name-args) ;
         if $(layout) = versioned

Original file line number	Diff line number	Diff line change
`@@ -185,7 +185,7 @@ else`
`185`	`185`
`186`	`186`	`rule tag ( name : type ? : property-set )`
`187`	`187`	`{`
`188`		`- if $(type) in STATIC_LIB SHARED_LIB IMPORT_LIB`
	`188`	`+ if $(type:E=x) in STATIC_LIB SHARED_LIB IMPORT_LIB`
`189`	`189`	`{`
`190`	`190`	`local args = $(.format-name-args) ;`
`191`	`191`	`if $(layout) = versioned`