Capture --inline value in Base.julia_cmd() (#29858)

Author: ararslan

base/util.jl

@@ -420,7 +420,12 @@ function julia_cmd(julia=joinpath(Sys.BINDIR::String, julia_exename()))
               else
                   "yes"
               end
-    `$julia -C$cpu_target -J$image_file --compile=$compile --depwarn=$depwarn`
+    inline  = if opts.can_inline == 0
+                  "no"
+              else
+                  "yes"
+              end
+    `$julia -C$cpu_target -J$image_file --compile=$compile --depwarn=$depwarn --inline=$inline`
 end
 
 function julia_exename()

test/cmdlineargs.jl

@@ -560,3 +560,9 @@ let exename = `$(Base.julia_cmd()) --startup-file=no`
         end
     end
 end
+
+# Issue #29855
+for yn in ("no", "yes")
+    exename = `$(Base.julia_cmd()) --startup-file=no --inline=$yn`
+    @test occursin("--inline=$yn", first(writereadpipeline("Base.julia_cmd()", exename)))
+end