Makefile: Tell GNU make to delete rule outputs on error (#15474)

Add .DELETE_ON_ERROR to the "build.make" files that contain the actual
build rules that generate files.  This tells GNU make to delete the
output of a rule if the recipe modifies the output but returns failure.
This is particularly useful for custom commands that use shell
redirection to produce a file.

Do not add .DELETE_ON_ERROR for Borland or Watcom make tools because
they may not tolerate it and would not honor it anyway.  Other make
tools that do not understand .DELETE_ON_ERROR will not be hurt.

Suggested-by: Andrey Vihrov <andrey.vihrov@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/Source/cmGlobalWatcomWMakeGenerator.h b/Source/cmGlobalWatcomWMakeGenerator.h
index 0e577b5..7bc209b 100644
--- a/Source/cmGlobalWatcomWMakeGenerator.h
+++ b/Source/cmGlobalWatcomWMakeGenerator.h
@@ -45,6 +45,7 @@ public:
                               cmMakefile *, bool optional);
 
   virtual bool AllowNotParallel() const { return false; }
+  virtual bool AllowDeleteOnError() const { return false; }
 };
 
 #endif