Quote R_HOME in recursive make test

Author: jgabry

R/utils.R

@@ -80,7 +80,7 @@ arch_is_aarch64 <- function() {
 }
 
 # Returns the type of make command to use to compile depending on the OS
-# First checks if $MAKE is set, otherwise falls back to system-specific default
+# First checks if $MAKE is set, otherwise falls back to "make"
 make_cmd <- function() {
   warn_if_ignored_msys_toolchain_env()
   if (Sys.getenv("MAKE") != "") {

tests/testthat/resources/recursive-cmdstan-flags.mk

@@ -1,3 +1,3 @@
 
 test:
-	@$(R_HOME)/bin/Rscript --vanilla -e "cat(cmdstanr:::get_cmdstan_flags('STANCFLAGS'))"
+	@"$(R_HOME)/bin/Rscript" --vanilla -e "cat(cmdstanr:::get_cmdstan_flags('STANCFLAGS'))"