Merge topic 'compiler-change-cleanup'

e83e6a1 Test Unix Makefiles generator support for changing compilers
c307e1c Tests/RunCMake: Allow tests to control build tree behavior
2963c98 Merge branch 'empty-compiler-crash' into compiler-change-cleanup
1df09e5 Delete entire CMakeFiles directory when deleting CMakeCache.txt (#13756)

Source/cmCacheManager.cxx

@@ -584,23 +584,15 @@ bool cmCacheManager::DeleteCache(const char* path)
   cmSystemTools::ConvertToUnixSlashes(cacheFile);
   std::string cmakeFiles = cacheFile;
   cacheFile += "/CMakeCache.txt";
-  cmSystemTools::RemoveFile(cacheFile.c_str());
-  // now remove the files in the CMakeFiles directory
-  // this cleans up language cache files
-  cmsys::Directory dir;
-  cmakeFiles += cmake::GetCMakeFilesDirectory();
-  dir.Load(cmakeFiles.c_str());
-  for (unsigned long fileNum = 0;
-    fileNum <  dir.GetNumberOfFiles();
-    ++fileNum)
-    {
-    if(!cmSystemTools::
-       FileIsDirectory(dir.GetFile(fileNum)))
+  if(cmSystemTools::FileExists(cacheFile.c_str()))
+    {
+    cmSystemTools::RemoveFile(cacheFile.c_str());
+    // now remove the files in the CMakeFiles directory
+    // this cleans up language cache files
+    cmakeFiles += cmake::GetCMakeFilesDirectory();
+    if(cmSystemTools::FileIsDirectory(cmakeFiles.c_str()))
       {
-      std::string fullPath = cmakeFiles;
-      fullPath += "/";
-      fullPath += dir.GetFile(fileNum);
-      cmSystemTools::RemoveFile(fullPath.c_str());
+      cmSystemTools::RemoveADirectory(cmakeFiles.c_str());
       }
     }
   return true;

Tests/RunCMake/CMakeLists.txt

@@ -52,6 +52,9 @@ if(XCODE_VERSION AND "${XCODE_VERSION}" VERSION_LESS 3)
 endif()
 
 add_RunCMake_test(CMP0019)
+if(UNIX AND "${CMAKE_TEST_GENERATOR}" MATCHES "Unix Makefiles")
+  add_RunCMake_test(CompilerChange)
+endif()
 add_RunCMake_test(ExternalData)
 add_RunCMake_test(GeneratorExpression)
 add_RunCMake_test(GeneratorToolset)

Tests/RunCMake/CompilerChange/CMakeLists.txt

@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 2.8)
+if(NOT RunCMake_TEST)
+  set(RunCMake_TEST "$ENV{RunCMake_TEST}") # needed when cache is deleted
+endif()
+project(${RunCMake_TEST} NONE)
+include(${RunCMake_TEST}.cmake)

Tests/RunCMake/CompilerChange/EmptyCompiler-result.txt

@@ -0,0 +1 @@
+1

Tests/RunCMake/CompilerChange/EmptyCompiler-stderr.txt

@@ -0,0 +1,5 @@
+You have changed variables that require your cache to be deleted.
+Configure will be re-run and you may have to reset some variables.
+The following variables have changed:
+CMAKE_C_COMPILER= *(
+|$)

Tests/RunCMake/CompilerChange/EmptyCompiler.cmake

@@ -0,0 +1,3 @@
+enable_language(C)
+message(STATUS "CMAKE_C_COMPILER is \"${CMAKE_C_COMPILER}\"")
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/cc.cmake" "set(CMAKE_C_COMPILER \"${CMAKE_C_COMPILER}\")\n")

Tests/RunCMake/CompilerChange/FindCompiler.cmake

@@ -0,0 +1,2 @@
+enable_language(C)
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/cc.cmake" "set(CMAKE_C_COMPILER \"${CMAKE_C_COMPILER}\")\n")

Tests/RunCMake/CompilerChange/FirstCompiler-stdout.txt

@@ -0,0 +1 @@
+-- CMAKE_C_COMPILER is ".*/Tests/RunCMake/CompilerChange/cc1.sh"

Tests/RunCMake/CompilerChange/FirstCompiler.cmake

@@ -0,0 +1,3 @@
+enable_language(C)
+message(STATUS "CMAKE_C_COMPILER is \"${CMAKE_C_COMPILER}\"")
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/cc.cmake" "set(CMAKE_C_COMPILER \"${CMAKE_C_COMPILER}\")\n")

Tests/RunCMake/CompilerChange/RunCMakeTest.cmake

@@ -0,0 +1,58 @@
+include(RunCMake)
+
+# Detect the compiler in use in the current environment.
+run_cmake(FindCompiler)
+include(${RunCMake_BINARY_DIR}/FindCompiler-build/cc.cmake)
+if(NOT CMAKE_C_COMPILER)
+  message(FATAL_ERROR "FindCompiler provided no compiler!")
+endif()
+if(NOT IS_ABSOLUTE "${CMAKE_C_COMPILER}")
+  message(FATAL_ERROR "FindCompiler provided non-absolute path \"${CMAKE_C_COMPILER}\"!")
+endif()
+if(NOT EXISTS "${CMAKE_C_COMPILER}")
+  message(FATAL_ERROR "FindCompiler provided non-existing path \"${CMAKE_C_COMPILER}\"!")
+endif()
+
+# Now that we have the full compiler path, hide CC.
+unset(ENV{CC})
+
+# Wrap around the real compiler so we can change the compiler
+# path without changing the underlying compiler.
+set(ccIn ${RunCMake_SOURCE_DIR}/cc.sh.in)
+set(cc1 ${RunCMake_BINARY_DIR}/cc1.sh)
+set(cc2 ${RunCMake_BINARY_DIR}/cc2.sh)
+set(cc3 CMAKE_C_COMPILER-NOTFOUND)
+configure_file(${ccIn} ${cc1} @ONLY IMMEDIATE)
+configure_file(${ccIn} ${cc2} @ONLY IMMEDIATE)
+
+# Use a single build tree for remaining tests without cleaning.
+set(RunCMake_TEST_BINARY_DIR ${RunCMake_BINARY_DIR}/ChangeCompiler-build)
+set(RunCMake_TEST_NO_CLEAN 1)
+file(REMOVE_RECURSE "${RunCMake_TEST_BINARY_DIR}")
+
+# Check build with compiler wrapper 1.
+set(RunCMake_TEST_OPTIONS -DCMAKE_C_COMPILER=${cc1})
+set(ENV{RunCMake_TEST} "FirstCompiler")
+run_cmake(FirstCompiler)
+include(${RunCMake_TEST_BINARY_DIR}/cc.cmake)
+if(NOT "${CMAKE_C_COMPILER}" STREQUAL "${cc1}")
+  message(FATAL_ERROR "FirstCompiler built with compiler:\n  ${CMAKE_C_COMPILER}\nand not with:\n  ${cc1}")
+endif()
+
+# Check rebuild with compiler wrapper 2.
+set(RunCMake_TEST_OPTIONS -DCMAKE_C_COMPILER=${cc2})
+set(ENV{RunCMake_TEST} "SecondCompiler")
+run_cmake(SecondCompiler)
+include(${RunCMake_TEST_BINARY_DIR}/cc.cmake)
+if(NOT "${CMAKE_C_COMPILER}" STREQUAL "${cc2}")
+  message(FATAL_ERROR "SecondCompiler built with compiler:\n  ${CMAKE_C_COMPILER}\nand not with:\n  ${cc2}")
+endif()
+
+# Check failure with an empty compiler string.
+set(RunCMake_TEST_OPTIONS -DCMAKE_C_COMPILER=)
+set(ENV{RunCMake_TEST} "EmptyCompiler")
+run_cmake(EmptyCompiler)
+include(${RunCMake_TEST_BINARY_DIR}/cc.cmake)
+if(NOT "${CMAKE_C_COMPILER}" STREQUAL "${cc3}")
+  message(FATAL_ERROR "Empty built with compiler:\n  ${CMAKE_C_COMPILER}\nand not with:\n  ${cc3}")
+endif()

Tests/RunCMake/CompilerChange/SecondCompiler-stderr.txt

@@ -0,0 +1,4 @@
+You have changed variables that require your cache to be deleted.
+Configure will be re-run and you may have to reset some variables.
+The following variables have changed:
+CMAKE_C_COMPILER=.*/Tests/RunCMake/CompilerChange/cc2.sh

Tests/RunCMake/CompilerChange/SecondCompiler-stdout.txt

@@ -0,0 +1 @@
+-- CMAKE_C_COMPILER is ".*/Tests/RunCMake/CompilerChange/cc2.sh"

Tests/RunCMake/CompilerChange/SecondCompiler.cmake

@@ -0,0 +1,3 @@
+enable_language(C)
+message(STATUS "CMAKE_C_COMPILER is \"${CMAKE_C_COMPILER}\"")
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/cc.cmake" "set(CMAKE_C_COMPILER \"${CMAKE_C_COMPILER}\")\n")

Tests/RunCMake/CompilerChange/cc.sh.in

@@ -0,0 +1,2 @@
+#!/bin/sh
+exec "@CMAKE_C_COMPILER@" "$@"

Tests/RunCMake/RunCMake.cmake

@@ -26,8 +26,12 @@ function(run_cmake test)
     endif()
   endforeach()
   set(RunCMake_TEST_SOURCE_DIR "${top_src}")
-  set(RunCMake_TEST_BINARY_DIR "${top_bin}/${test}-build")
-  file(REMOVE_RECURSE "${RunCMake_TEST_BINARY_DIR}")
+  if(NOT RunCMake_TEST_BINARY_DIR)
+    set(RunCMake_TEST_BINARY_DIR "${top_bin}/${test}-build")
+  endif()
+  if(NOT RunCMake_TEST_NO_CLEAN)
+    file(REMOVE_RECURSE "${RunCMake_TEST_BINARY_DIR}")
+  endif()
   file(MAKE_DIRECTORY "${RunCMake_TEST_BINARY_DIR}")
   if(NOT DEFINED RunCMake_TEST_OPTIONS)
     set(RunCMake_TEST_OPTIONS "")