FPHSA: detect package name mismatches

The `FPHSA_NAME_MISMATCHED` variable may be set if this is intentional
(but should be cleared after the call to not affect other FPHSA calls).
It may also be passed via the `NAME_MISMATCHED` option for new-signature
FPHSA calls.

8 files changed, 55 insertions, 0 deletions

diff --git a/Tests/RunCMake/FPHSA/FindNameMismatch.cmake b/Tests/RunCMake/FPHSA/FindNameMismatch.cmake
new file mode 100644
index 0000000..540aa67
--- /dev/null
+++ b/Tests/RunCMake/FPHSA/FindNameMismatch.cmake
@@ -0,0 +1,4 @@
+set("${CMAKE_FIND_PACKAGE_NAME}_MODULE" "${CMAKE_CURRENT_LIST_FILE}")
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(NAMEMISMATCH REQUIRED_VARS "${CMAKE_FIND_PACKAGE_NAME}_MODULE")
+set("${CMAKE_FIND_PACKAGE_NAME}_FOUND" 1)
diff --git a/Tests/RunCMake/FPHSA/FindNameMismatchOld.cmake b/Tests/RunCMake/FPHSA/FindNameMismatchOld.cmake
new file mode 100644
index 0000000..d155ea7
--- /dev/null
+++ b/Tests/RunCMake/FPHSA/FindNameMismatchOld.cmake
@@ -0,0 +1,4 @@
+set("${CMAKE_FIND_PACKAGE_NAME}_MODULE" "${CMAKE_CURRENT_LIST_FILE}")
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(NAMEMISMATCH "old signature" "${CMAKE_FIND_PACKAGE_NAME}_MODULE")
+set("${CMAKE_FIND_PACKAGE_NAME}_FOUND" 1)
diff --git a/Tests/RunCMake/FPHSA/FindNameMismatchSuppressed.cmake b/Tests/RunCMake/FPHSA/FindNameMismatchSuppressed.cmake
new file mode 100644
index 0000000..042a59a
--- /dev/null
+++ b/Tests/RunCMake/FPHSA/FindNameMismatchSuppressed.cmake
@@ -0,0 +1,6 @@
+set("${CMAKE_FIND_PACKAGE_NAME}_MODULE" "${CMAKE_CURRENT_LIST_FILE}")
+include(FindPackageHandleStandardArgs)
+set(FPHSA_NAME_MISMATCHED 1)
+find_package_handle_standard_args(NAMEMISMATCH "old signature" "${CMAKE_FIND_PACKAGE_NAME}_MODULE")
+unset(FPHSA_NAME_MISMATCHED)
+set("${CMAKE_FIND_PACKAGE_NAME}_FOUND" 1)
diff --git a/Tests/RunCMake/FPHSA/FindNameMismatchSuppressedArg.cmake b/Tests/RunCMake/FPHSA/FindNameMismatchSuppressedArg.cmake
new file mode 100644
index 0000000..6a0e964
--- /dev/null
+++ b/Tests/RunCMake/FPHSA/FindNameMismatchSuppressedArg.cmake
@@ -0,0 +1,4 @@
+set("${CMAKE_FIND_PACKAGE_NAME}_MODULE" "${CMAKE_CURRENT_LIST_FILE}")
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(NAMEMISMATCH NAME_MISMATCHED REQUIRED_VARS "${CMAKE_FIND_PACKAGE_NAME}_MODULE")
+set("${CMAKE_FIND_PACKAGE_NAME}_FOUND" 1)
diff --git a/Tests/RunCMake/FPHSA/FindNameMismatchSuppressedCompat.cmake b/Tests/RunCMake/FPHSA/FindNameMismatchSuppressedCompat.cmake
new file mode 100644
index 0000000..791cfee
--- /dev/null
+++ b/Tests/RunCMake/FPHSA/FindNameMismatchSuppressedCompat.cmake
@@ -0,0 +1,6 @@
+set("${CMAKE_FIND_PACKAGE_NAME}_MODULE" "${CMAKE_CURRENT_LIST_FILE}")
+include(FindPackageHandleStandardArgs)
+set(FPHSA_NAME_MISMATCHED 1)
+find_package_handle_standard_args(NAMEMISMATCH REQUIRED_VARS "${CMAKE_FIND_PACKAGE_NAME}_MODULE")
+unset(FPHSA_NAME_MISMATCHED)
+set("${CMAKE_FIND_PACKAGE_NAME}_FOUND" 1)
diff --git a/Tests/RunCMake/FPHSA/NameMismatch-stderr.txt b/Tests/RunCMake/FPHSA/NameMismatch-stderr.txt
new file mode 100644
index 0000000..722b50b
--- /dev/null
+++ b/Tests/RunCMake/FPHSA/NameMismatch-stderr.txt
@@ -0,0 +1,23 @@
+CMake Warning \(dev\) at .*/Modules/FindPackageHandleStandardArgs.cmake:[0-9]+ \(message\):
+  The package name passed to `find_package_handle_standard_args`
+  \(NAMEMISMATCH\) does not match the name of the calling package
+  \(NameMismatch\).  This can lead to problems in calling code that expects
+  `find_package` result variables \(e.g., `_FOUND`\) to follow a certain
+  pattern.
+Call Stack \(most recent call first\):
+  FindNameMismatch.cmake:3 \(find_package_handle_standard_args\)
+  NameMismatch.cmake:3 \(find_package\)
+  CMakeLists.txt:3 \(include\)
+This warning is for project developers.  Use -Wno-dev to suppress it.
+
+CMake Warning \(dev\) at .*/Modules/FindPackageHandleStandardArgs.cmake:[0-9]+ \(message\):
+  The package name passed to `find_package_handle_standard_args`
+  \(NAMEMISMATCH\) does not match the name of the calling package
+  \(NameMismatchOld\).  This can lead to problems in calling code that expects
+  `find_package` result variables \(e.g., `_FOUND`\) to follow a certain
+  pattern.
+Call Stack \(most recent call first\):
+  FindNameMismatchOld.cmake:3 \(find_package_handle_standard_args\)
+  NameMismatch.cmake:4 \(find_package\)
+  CMakeLists.txt:3 \(include\)
+This warning is for project developers.  Use -Wno-dev to suppress it.
diff --git a/Tests/RunCMake/FPHSA/NameMismatch.cmake b/Tests/RunCMake/FPHSA/NameMismatch.cmake
new file mode 100644
index 0000000..9ca3cc6
--- /dev/null
+++ b/Tests/RunCMake/FPHSA/NameMismatch.cmake
@@ -0,0 +1,7 @@
+set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}")
+
+find_package(NameMismatch REQUIRED)
+find_package(NameMismatchOld REQUIRED)
+find_package(NameMismatchSuppressed REQUIRED)
+find_package(NameMismatchSuppressedCompat REQUIRED)
+find_package(NameMismatchSuppressedArg REQUIRED)
diff --git a/Tests/RunCMake/FPHSA/RunCMakeTest.cmake b/Tests/RunCMake/FPHSA/RunCMakeTest.cmake
index f3e6c3e..286915d 100644
--- a/Tests/RunCMake/FPHSA/RunCMakeTest.cmake
+++ b/Tests/RunCMake/FPHSA/RunCMakeTest.cmake
@@ -1,6 +1,7 @@
 include(RunCMake)
 
 run_cmake(BadFoundVar)
+run_cmake(NameMismatch)
 
 # The pseudo module will "find" a package with the given version. Check if the
 # version selection code in FPHSA works correctly.