Normalize OBJECT_DEPENDS paths to match custom commands (#15366)

Custom command path normalization added in commit v3.1.0-rc1~471^2
(add_custom_command: Normalize OUTPUT and DEPENDS paths, 2014-05-28)
broke use of OBJECT_DEPENDS to bring in custom commands because the
latter paths were not normalized too.  Normalize them and add a test
case.

Reported-by: Daniel v. Gerpen

Source/cmGeneratorTarget.cxx

@@ -676,6 +676,14 @@ void cmTargetTraceDependencies::Trace()
       {
       std::vector<std::string> objDeps;
       cmSystemTools::ExpandListArgument(additionalDeps, objDeps);
+      for(std::vector<std::string>::iterator odi = objDeps.begin();
+          odi != objDeps.end(); ++odi)
+        {
+        if (cmSystemTools::FileIsFullPath(*odi))
+          {
+          *odi = cmSystemTools::CollapseFullPath(*odi);
+          }
+        }
       this->FollowNames(objDeps);
       }
 

Source/cmNinjaTargetGenerator.cxx

@@ -600,6 +600,14 @@ cmNinjaTargetGenerator
   if(const char* objectDeps = source->GetProperty("OBJECT_DEPENDS")) {
     std::vector<std::string> depList;
     cmSystemTools::ExpandListArgument(objectDeps, depList);
+    for(std::vector<std::string>::iterator odi = depList.begin();
+        odi != depList.end(); ++odi)
+      {
+      if (cmSystemTools::FileIsFullPath(*odi))
+        {
+        *odi = cmSystemTools::CollapseFullPath(*odi);
+        }
+      }
     std::transform(depList.begin(), depList.end(),
                    std::back_inserter(implicitDeps), MapToNinjaPath());
   }

Tests/CustomCommand/CMakeLists.txt

@@ -153,6 +153,19 @@ add_custom_command(OUTPUT ${PROJECT_BINARY_DIR}/foo.c
   ${PROJECT_BINARY_DIR}/foo.c
   )
 
+# Test using OBJECT_DEPENDS to bring in a custom command.
+# Use a path that can be simplified to make sure paths
+# are consistently normalized.
+add_custom_command(
+  OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/subdir/../subdir/subdir.h
+  COMMAND ${CMAKE_COMMAND} -E copy
+            ${CMAKE_CURRENT_SOURCE_DIR}/subdir.h.in
+            ${CMAKE_CURRENT_BINARY_DIR}/subdir/subdir.h
+  DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/subdir.h.in
+  )
+set_property(SOURCE ${PROJECT_BINARY_DIR}/foo.c PROPERTY
+  OBJECT_DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/subdir/../subdir/subdir.h)
+
 # Add custom command to generate not_included.h, which is a header
 # file that is not included by any source in this project.  This will
 # test whether all custom command outputs explicitly listed as sources

Tests/CustomCommand/foo.in

@@ -7,6 +7,11 @@
 int generated();
 int wrapped();
 
+#include "subdir/subdir.h"
+#ifndef SUBDIR_DEF
+# error SUBDIR_DEF not defined
+#endif
+
 int main ()
 {
   if (generated()*wrapped()*doc() == 3*5*7)

Tests/CustomCommand/subdir.h.in

@@ -0,0 +1 @@
+#define SUBDIR_DEF