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-rw-r--r--Source/cmIncludeCommand.h7
-rw-r--r--Source/cmMakefile.cxx105
-rw-r--r--Source/cmPolicies.cxx16
-rw-r--r--Source/cmPolicies.h1
-rw-r--r--Tests/FindPackageTest/CMakeLists.txt10
-rw-r--r--Tests/FindPackageTest/FindPackageHandleStandardArgs.cmake1
6 files changed, 118 insertions, 22 deletions
diff --git a/Source/cmIncludeCommand.h b/Source/cmIncludeCommand.h
index 8704750..a6d43ba 100644
--- a/Source/cmIncludeCommand.h
+++ b/Source/cmIncludeCommand.h
@@ -73,7 +73,12 @@ public:
"the variable will be set to the full filename which "
"has been included or NOTFOUND if it failed.\n"
"If a module is specified instead of a file, the file with name "
- "<modulename>.cmake is searched in the CMAKE_MODULE_PATH."
+ "<modulename>.cmake is searched first in CMAKE_MODULE_PATH, then in the "
+ "CMake module directory. There is one exception to this: if the file "
+ "which calls include() is located itself in the CMake module directory, "
+ "then first the CMake module directory is searched and "
+ "CMAKE_MODULE_PATH afterwards. This behaviour is controlled by policy "
+ "CMP0017."
"\n"
"See the cmake_policy() command documentation for discussion of the "
"NO_POLICY_SCOPE option."
diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index 56e0ed9..ccf4d7a 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -2822,35 +2822,100 @@ void cmMakefile::DisplayStatus(const char* message, float s)
std::string cmMakefile::GetModulesFile(const char* filename)
{
- std::vector<std::string> modulePath;
- const char* def = this->GetDefinition("CMAKE_MODULE_PATH");
- if(def)
+ std::string result;
+
+ // We search the module always in CMAKE_ROOT and in CMAKE_MODULE_PATH,
+ // and then decide based on the policy setting which one to return.
+ // See CMP0017 for more details.
+ // The specific problem was that KDE 4.5.0 installs a
+ // FindPackageHandleStandardArgs.cmake which doesn't have the new features
+ // of FPHSA.cmake introduced in CMake 2.8.3 yet, and by setting
+ // CMAKE_MODULE_PATH also e.g. FindZLIB.cmake from cmake included
+ // FPHSA.cmake from kdelibs and not from CMake, and tried to use the
+ // new features, which were not there in the version from kdelibs, and so
+ // failed ("
+ std::string moduleInCMakeRoot;
+ std::string moduleInCMakeModulePath;
+
+ // Always search in CMAKE_MODULE_PATH:
+ const char* cmakeModulePath = this->GetDefinition("CMAKE_MODULE_PATH");
+ if(cmakeModulePath)
+ {
+ std::vector<std::string> modulePath;
+ cmSystemTools::ExpandListArgument(cmakeModulePath, modulePath);
+
+ //Look through the possible module directories.
+ for(std::vector<std::string>::iterator i = modulePath.begin();
+ i != modulePath.end(); ++i)
+ {
+ std::string itempl = *i;
+ cmSystemTools::ConvertToUnixSlashes(itempl);
+ itempl += "/";
+ itempl += filename;
+ if(cmSystemTools::FileExists(itempl.c_str()))
+ {
+ moduleInCMakeModulePath = itempl;
+ break;
+ }
+ }
+ }
+
+ // Always search in the standard modules location.
+ const char* cmakeRoot = this->GetDefinition("CMAKE_ROOT");
+ if(cmakeRoot)
{
- cmSystemTools::ExpandListArgument(def, modulePath);
+ moduleInCMakeRoot = cmakeRoot;
+ moduleInCMakeRoot += "/Modules/";
+ moduleInCMakeRoot += filename;
+ cmSystemTools::ConvertToUnixSlashes(moduleInCMakeRoot);
+ if(!cmSystemTools::FileExists(moduleInCMakeRoot.c_str()))
+ {
+ moduleInCMakeRoot = "";
+ }
}
- // Also search in the standard modules location.
- def = this->GetDefinition("CMAKE_ROOT");
- if(def)
+ // Normally, prefer the files found in CMAKE_MODULE_PATH. Only when the file
+ // from which we are being called is located itself in CMAKE_ROOT, then
+ // prefer results from CMAKE_ROOT depending on the policy setting.
+ result = moduleInCMakeModulePath;
+ if (result.size() == 0)
{
- std::string rootModules = def;
- rootModules += "/Modules";
- modulePath.push_back(rootModules);
+ result = moduleInCMakeRoot;
}
- //std::string Look through the possible module directories.
- for(std::vector<std::string>::iterator i = modulePath.begin();
- i != modulePath.end(); ++i)
+
+ if ((moduleInCMakeModulePath.size()>0) && (moduleInCMakeRoot.size()>0))
{
- std::string itempl = *i;
- cmSystemTools::ConvertToUnixSlashes(itempl);
- itempl += "/";
- itempl += filename;
- if(cmSystemTools::FileExists(itempl.c_str()))
+ const char* currentFile = this->GetDefinition("CMAKE_CURRENT_LIST_FILE");
+ if (currentFile && (strstr(currentFile, cmakeRoot) == currentFile))
{
- return itempl;
+ switch (this->GetPolicyStatus(cmPolicies::CMP0017))
+ {
+ case cmPolicies::WARN:
+ {
+ cmOStringStream e;
+ e << "File " << currentFile << " includes "
+ << moduleInCMakeModulePath
+ << " (found via CMAKE_MODULE_PATH) which shadows "
+ << moduleInCMakeRoot << ". This may cause errors later on .\n"
+ << this->GetPolicies()->GetPolicyWarning(cmPolicies::CMP0017);
+
+ this->IssueMessage(cmake::AUTHOR_WARNING, e.str());
+ // break; // fall through to OLD behaviour
+ }
+ case cmPolicies::OLD:
+ result = moduleInCMakeModulePath;
+ break;
+ case cmPolicies::REQUIRED_IF_USED:
+ case cmPolicies::REQUIRED_ALWAYS:
+ case cmPolicies::NEW:
+ default:
+ result = moduleInCMakeRoot;
+ break;
+ }
}
}
- return "";
+
+ return result;
}
void cmMakefile::ConfigureString(const std::string& input,
diff --git a/Source/cmPolicies.cxx b/Source/cmPolicies.cxx
index fccf0cc..34c74c2 100644
--- a/Source/cmPolicies.cxx
+++ b/Source/cmPolicies.cxx
@@ -446,6 +446,22 @@ cmPolicies::cmPolicies()
"wasn't a valid target. "
"In CMake 2.8.3 and above it reports an error in this case.",
2,8,3,0, cmPolicies::WARN);
+
+ this->DefinePolicy(
+ CMP0017, "CMP0017",
+ "Prefer files from CMAKE_ROOT/ when including from CMAKE_ROOT.",
+ "Starting with CMake 2.8.3, if a cmake-module shipped with CMake (i.e. "
+ "located in CMAKE_ROOT/Modules/) calls include() or find_package(), "
+ "the files located in CMAKE_ROOT/Modules/ are prefered over the files "
+ "in CMAKE_MODULE_PATH. This makes sure that the modules belonging to "
+ "CMake always get those files included which they expect, and against "
+ "which they were developed and tested. "
+ "In call other cases, the files found in "
+ "CMAKE_MODULE_PATH still take precedence over the ones in "
+ "CMAKE_ROOT/Modules/. "
+ "The OLD behaviour is to always prefer files from CMAKE_MODULE_PATH over "
+ "files from CMAKE_ROOT/Modules/.",
+ 2,8,3,0, cmPolicies::WARN);
}
cmPolicies::~cmPolicies()
diff --git a/Source/cmPolicies.h b/Source/cmPolicies.h
index 87eb646..2160f37 100644
--- a/Source/cmPolicies.h
+++ b/Source/cmPolicies.h
@@ -52,6 +52,7 @@ public:
CMP0014, // Input directories must have CMakeLists.txt
CMP0015, // link_directories() treats paths relative to source dir
CMP0016, // target_link_libraries() fails if only argument is not a target
+ CMP0017, // Prefer files in CMAKE_ROOT when including from CMAKE_ROOT
// Always the last entry. Useful mostly to avoid adding a comma
// the last policy when adding a new one.
diff --git a/Tests/FindPackageTest/CMakeLists.txt b/Tests/FindPackageTest/CMakeLists.txt
index a472bea..fb12121 100644
--- a/Tests/FindPackageTest/CMakeLists.txt
+++ b/Tests/FindPackageTest/CMakeLists.txt
@@ -1,6 +1,15 @@
cmake_minimum_required (VERSION 2.6)
PROJECT(FindPackageTest)
+LIST(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR})
+
+# Look for a package which uses FindPackageHandleStandardArgs.cmake with the
+# new (as of cmake 2.8.3) syntax. This works only if CMP0017 is set to NEW,
+# because otherwise FindPackageHandleStandardArgs.cmake from the current
+# directory is included (via CMAKE_MODULE_PATH).
+CMAKE_POLICY(SET CMP0017 NEW)
+FIND_PACKAGE(ZLIB)
+
# Look for a package that has a find module and may be found.
FIND_PACKAGE(OpenGL QUIET)
@@ -23,7 +32,6 @@ IF(NOT FOO_DIR)
CMAKE_PREFIX_PATH = ${CMAKE_PREFIX_PATH}")
ENDIF(NOT FOO_DIR)
-LIST(APPEND CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR})
FIND_PACKAGE(VersionTestA 1)
FIND_PACKAGE(VersionTestB 1.2)
FIND_PACKAGE(VersionTestC 1.2.3)
diff --git a/Tests/FindPackageTest/FindPackageHandleStandardArgs.cmake b/Tests/FindPackageTest/FindPackageHandleStandardArgs.cmake
new file mode 100644
index 0000000..7e41c96
--- /dev/null
+++ b/Tests/FindPackageTest/FindPackageHandleStandardArgs.cmake
@@ -0,0 +1 @@
+message(FATAL_ERROR "This file (${CMAKE_CURRENT_LIST_FILE}) must not be included, but FindPackageHandleStandardArgs.cmake from Modules/ instead !")
generated by cgit v0.12 at 2024-12-27 21:41:43 (GMT)