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, 8 insertions, 0 deletions

diff --git a/Source/cmMakefileTargetGenerator.cxx b/Source/cmMakefileTargetGenerator.cxx
index 641cd23..2cd2d3e 100644
--- a/Source/cmMakefileTargetGenerator.cxx
+++ b/Source/cmMakefileTargetGenerator.cxx
@@ -122,6 +122,14 @@ void cmMakefileTargetGenerator::CreateRuleFile()
     return;
     }
   this->LocalGenerator->WriteDisclaimer(*this->BuildFileStream);
+  if (this->GlobalGenerator->AllowDeleteOnError())
+    {
+    std::vector<std::string> no_depends;
+    std::vector<std::string> no_commands;
+    this->LocalGenerator->WriteMakeRule(
+      *this->BuildFileStream, "Delete rule output on recipe failure.",
+      ".DELETE_ON_ERROR", no_depends, no_commands, false);
+    }
   this->LocalGenerator->WriteSpecialTargetsTop(*this->BuildFileStream);
 }