add dynlibOverrideAll switch (#6873)

compiler/commands.nim

@@ -654,6 +654,9 @@ proc processSwitch(switch, arg: string, pass: TCmdLinePass, info: TLineInfo;
     gListFullPaths = true
   of "dynliboverride":
     dynlibOverride(switch, arg, pass, info)
+  of "dynliboverrideall":
+    expectNoArg(switch, arg, pass, info)
+    gDynlibOverrideAll = true
   of "cs":
     # only supported for compatibility. Does nothing.
     expectArg(switch, arg, pass, info)

compiler/options.nim

@@ -145,6 +145,7 @@ var
   gNoNimblePath* = false
   gExperimentalMode*: bool
   newDestructors*: bool
+  gDynlibOverrideAll*: bool
 
 proc importantComments*(): bool {.inline.} = gCmd in {cmdDoc, cmdIdeTools}
 proc usesNativeGC*(): bool {.inline.} = gSelectedGC >= gcRefc
@@ -427,7 +428,7 @@ proc inclDynlibOverride*(lib: string) =
   gDllOverrides[lib.canonDynlibName] = "true"
 
 proc isDynlibOverride*(lib: string): bool =
-  result = gDllOverrides.hasKey(lib.canonDynlibName)
+  result = gDynlibOverrideAll or gDllOverrides.hasKey(lib.canonDynlibName)
 
 proc binaryStrSearch*(x: openArray[string], y: string): int =
   var a = 0

doc/advopt.txt

@@ -79,6 +79,7 @@ Advanced options:
                             symbol matching is fuzzy so
                             that --dynlibOverride:lua matches
                             dynlib: "liblua.so.3"
+  --dynlibOverrideAll       makes the dynlib pragma have no effect
   --listCmd                 list the commands used to execute external programs
   --parallelBuild:0|1|...   perform a parallel build
                             value = number of processors (0 for auto-detect)