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find_package: Fix NO_MODULE under CMAKE_FIND_PACKAGE_PREFER_CONFIG

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The module mode fallback added by commit 22e65d10c1 (find_package: Fixed
CMAKE_FIND_PACKAGE_PREFER_CONFIG Module fallback, 2019-06-13,
v3.15.0-rc2~6^2) should not be used unless the `find_package` call
allows module mode.  Doing so can lead to infinite recursion if a find
module tries to call config mode with `find_package(...  NO_MODULE)`.
Fix the logic and add a test case.

Fixes: #19478
This commit is contained in:
Cristian Adam 2019-07-16 10:42:00 +02:00 committed by Brad King
parent 86ead0b5a3
commit f2edccea66
4 changed files with 38 additions and 2 deletions
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5
Source/cmFindPackageCommand.cxx
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@ -823,8 +823,9 @@ bool cmFindPackageCommand::HandlePackageMode(
}
}
if (this->Makefile->IsOn("CMAKE_FIND_PACKAGE_PREFER_CONFIG") && !found &&
handlePackageModeType == HandlePackageModeType::Config) {
if (this->UseFindModules && !found &&
handlePackageModeType == HandlePackageModeType::Config &&
this->Makefile->IsOn("CMAKE_FIND_PACKAGE_PREFER_CONFIG")) {
// Config mode failed. Allow Module case.
result = false;
}

33
Tests/FindPackageTest/CMakeLists.txt
View File

@ -579,6 +579,26 @@ endif()
set(CMAKE_FIND_PACKAGE_PREFER_CONFIG OFF)
set(CMAKE_PREFIX_PATH)
set(CMAKE_MODULE_PATH)
############################################################################
##Test FIND_PACKAGE CMAKE_FIND_PACKAGE_PREFER_CONFIG - Do not recurse
# No CMAKE_PREFIX_PATH
set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/PreferConfigRecurse)
# Now prefer config mode
set(CMAKE_FIND_PACKAGE_PREFER_CONFIG ON)
unset(ACME_FOUND)
unset(ACME_CONFIG)
find_package(ACME)
if(ACME_FOUND AND ACME_CONFIG)
message(SEND_ERROR "Incorrectly found ACME in CONFIG mode, from the MODULE package")
endif()
set(CMAKE_FIND_PACKAGE_PREFER_CONFIG OFF)
set(CMAKE_MODULE_PATH)
############################################################################
##Test find_package CMAKE_FIND_PACKAGE_PREFER_CONFIG with module fallback
@ -592,3 +612,16 @@ find_package(ACME REQUIRED)
if(NOT ACME_FOUND)
message(SEND_ERROR "Did not find ACME package")
endif()
############################################################################
##Test find_package CMAKE_FIND_PACKAGE_PREFER_CONFIG with NO_MODULE
set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/PreferConfigOnlyModule)
set(CMAKE_FIND_PACKAGE_PREFER_CONFIG ON)
find_package(ACME NO_MODULE)
if(ACME_FOUND)
message(SEND_ERROR "Should not find ACME package")
endif()

1
Tests/FindPackageTest/PreferConfigRecurse/ACMEConfig.cmake Normal file
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@ -0,0 +1 @@
set(ACME_FOUND TRUE)

1
Tests/FindPackageTest/PreferConfigRecurse/FindACME.cmake Normal file
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@ -0,0 +1 @@
find_package(ACME NO_MODULE)