update c++ linking strategy

Author: shikokuchuo

R/watcher-package.R

@@ -4,8 +4,10 @@
 #' @keywords internal
 "_PACKAGE"
 
-# To silence R CMD check note: All declared Imports should be used.
+# Silences R CMD check note: All declared Imports should be used
 # rlang is not loaded unless used, later is loaded but used only at C level
+# nocov start
 .internal <- function() {
   if (FALSE) later::run_now(rlang::as_function(identity))
 }
+# nocov end

src/Makevars.ucrt

@@ -1,2 +1,2 @@
 PKG_CFLAGS=-I../install/include $(C_VISIBILITY)
-PKG_LIBS=-L../install/lib -lfswatch -lstdc++ -static-libgcc -static-libstdc++ -pthread
+PKG_LIBS=-L../install/lib -lfswatch -pthread

src/Makevars.win

@@ -1,2 +1,2 @@
 PKG_CFLAGS=-I../install/include $(C_VISIBILITY)
-PKG_LIBS=-L../install/lib -Wl,-Bstatic -lfswatch -lstdc++ -lstdc++fs -pthread -Wl,-Bdynamic
+PKG_LIBS=-L../install/lib -lfswatch -pthread -lstdc++fs

src/link.cpp

@@ -0,0 +1 @@
+/* this empty .cpp file in /src triggers R to link against C++ */