FindPkgConfig: support also > and < operators for version compares

Fixes: #18416

2 files changed, 84 insertions, 0 deletions

diff --git a/Tests/RunCMake/FindPkgConfig/FindPkgConfig_VERSION_OPERATORS.cmake b/Tests/RunCMake/FindPkgConfig/FindPkgConfig_VERSION_OPERATORS.cmake
new file mode 100644
index 0000000..2a505c6
--- /dev/null
+++ b/Tests/RunCMake/FindPkgConfig/FindPkgConfig_VERSION_OPERATORS.cmake
@@ -0,0 +1,83 @@
+cmake_minimum_required(VERSION 3.12)
+
+project(FindPkgConfig_IMPORTED_TARGET C)
+
+find_package(PkgConfig REQUIRED)
+
+message(STATUS "source: ${CMAKE_CURRENT_SOURCE_DIR} bin ${CMAKE_CURRENT_BINARY_DIR}")
+
+# Setup for the remaining package tests below
+set(PKG_CONFIG_USE_CMAKE_PREFIX_PATH)
+set(fakePkgDir ${CMAKE_CURRENT_BINARY_DIR}/pc-fakepackage)
+file(WRITE ${fakePkgDir}/lib/libcmakeinternalfakepackage.a "")
+file(WRITE ${fakePkgDir}/lib/cmakeinternalfakepackage.lib  "")
+file(WRITE ${fakePkgDir}/lib/pkgconfig/cmakeinternalfakepackage.pc
+"Name: CMakeInternalFakePackage
+Description: Dummy package for FindPkgConfig VERSION_OPERATORS test
+Version: 8.9
+Libs: -lcmakeinternalfakepackage
+")
+
+# Always find the .pc file in the calls further below so that we can test that
+# the import target find_library() calls handle the NO...PATH options correctly
+set(ENV{PKG_CONFIG_PATH} ${fakePkgDir}/lib/pkgconfig)
+
+pkg_check_modules(FakePackageGE REQUIRED QUIET "cmakeinternalfakepackage >= 8")
+if (NOT FakePackageGE_FOUND)
+  message(FATAL_ERROR "fake package >= 8 not found")
+endif()
+
+pkg_check_modules(FakePackageGE_FAIL QUIET "cmakeinternalfakepackage >= 8.10")
+if (FakePackageGE_FAIL_FOUND)
+  message(FATAL_ERROR "fake package >= 8.10 found")
+endif()
+
+pkg_check_modules(FakePackageLE REQUIRED QUIET "cmakeinternalfakepackage<=9")
+if (NOT FakePackageLE_FOUND)
+  message(FATAL_ERROR "fake package <= 9 not found")
+endif()
+
+pkg_check_modules(FakePackageLE_FAIL QUIET "cmakeinternalfakepackage <= 8.1")
+if (FakePackageLE_FAIL_FOUND)
+  message(FATAL_ERROR "fake package <= 8.1 found")
+endif()
+
+pkg_check_modules(FakePackageGT REQUIRED QUIET "cmakeinternalfakepackage > 8")
+if (NOT FakePackageGT_FOUND)
+  message(FATAL_ERROR "fake package > 8 not found")
+endif()
+
+pkg_check_modules(FakePackageGT_FAIL QUIET "cmakeinternalfakepackage > 8.9")
+if (FakePackageGT_FAIL_FOUND)
+  message(FATAL_ERROR "fake package > 8.9 found")
+endif()
+
+pkg_check_modules(FakePackageLT REQUIRED QUIET "cmakeinternalfakepackage<9")
+if (NOT FakePackageLT_FOUND)
+  message(FATAL_ERROR "fake package < 9 not found")
+endif()
+
+pkg_check_modules(FakePackageLT_FAIL QUIET "cmakeinternalfakepackage < 8.9")
+if (FakePackageLT_FAIL_FOUND)
+  message(FATAL_ERROR "fake package < 8.9 found")
+endif()
+
+pkg_check_modules(FakePackageEQ REQUIRED QUIET "cmakeinternalfakepackage=8.9")
+if (NOT FakePackageEQ_FOUND)
+  message(FATAL_ERROR "fake package = 8.9 not found")
+endif()
+
+pkg_check_modules(FakePackageEQ_FAIL QUIET "cmakeinternalfakepackage = 8.8")
+if (FakePackageEQ_FAIL_FOUND)
+  message(FATAL_ERROR "fake package = 8.8 found")
+endif()
+
+pkg_check_modules(FakePackageEQ_INV QUIET "cmakeinternalfakepackage == 8.9")
+if (FakePackageEQ_FAIL_FOUND)
+  message(FATAL_ERROR "fake package == 8.9 found")
+endif()
+
+pkg_check_modules(FakePackageLLT_INV QUIET "cmakeinternalfakepackage <<= 9")
+if (FakePackageLLT_FAIL_FOUND)
+  message(FATAL_ERROR "fake package <<= 9 found")
+endif()
diff --git a/Tests/RunCMake/FindPkgConfig/RunCMakeTest.cmake b/Tests/RunCMake/FindPkgConfig/RunCMakeTest.cmake
index e12b52f..671ff51 100644
--- a/Tests/RunCMake/FindPkgConfig/RunCMakeTest.cmake
+++ b/Tests/RunCMake/FindPkgConfig/RunCMakeTest.cmake
@@ -16,4 +16,5 @@ if (PKG_CONFIG_FOUND)
   run_cmake(FindPkgConfig_GET_VARIABLE)
   run_cmake(FindPkgConfig_cache_variables)
   run_cmake(FindPkgConfig_IMPORTED_TARGET)
+  run_cmake(FindPkgConfig_VERSION_OPERATORS)
 endif ()