Revert "Use standard CMake constructs to export the library's targets. (#260)" (#364)

breaks `make dist` and while it might be tweaked further, is likely to
need time to stabilize so doing so has been punted for now.

This mostly reverts commit def175f.

Author: carenas

CMakeLists.txt

@@ -101,7 +101,6 @@
 # 2021-08-28 PH added test for realpath()
 # 2022-12-10 PH added support for pcre2posix_test
 # 2023-01-15 Carlo added C99 as the minimum required
-# 2023-06-03 Theodore used standard CMake constructs to export the library's targets.
 # 2023-08-06 PH added support for setting variable length lookbehind maximum
 
 # Increased minimum to 3.5 to workaround deprecated backward compatibility
@@ -144,7 +143,6 @@ INCLUDE(CheckFunctionExists)
 INCLUDE(CheckSymbolExists)
 INCLUDE(CheckIncludeFile)
 INCLUDE(CheckTypeSize)
-INCLUDE(CMakePackageConfigHelpers)
 INCLUDE(GNUInstallDirs) # for CMAKE_INSTALL_LIBDIR
 
 CHECK_INCLUDE_FILE(dirent.h     HAVE_DIRENT_H)
@@ -697,9 +695,7 @@ IF(PCRE2_BUILD_PCRE2_8)
       VERSION ${LIBPCRE2_8_VERSION}
       SOVERSION ${LIBPCRE2_8_SOVERSION})
     TARGET_COMPILE_DEFINITIONS(pcre2-8-static PUBLIC PCRE2_STATIC)
-    TARGET_INCLUDE_DIRECTORIES(pcre2-8-static PUBLIC
-      $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>
-      $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
+    TARGET_INCLUDE_DIRECTORIES(pcre2-8-static PUBLIC ${PROJECT_BINARY_DIR})
     IF(REQUIRE_PTHREAD)
         TARGET_LINK_LIBRARIES(pcre2-8-static Threads::Threads)
     ENDIF(REQUIRE_PTHREAD)
@@ -712,9 +708,7 @@ IF(PCRE2_BUILD_PCRE2_8)
       VERSION ${LIBPCRE2_POSIX_VERSION}
       SOVERSION ${LIBPCRE2_POSIX_SOVERSION})
     TARGET_LINK_LIBRARIES(pcre2-posix-static pcre2-8-static)
-    TARGET_INCLUDE_DIRECTORIES(pcre2-posix-static PUBLIC
-      $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>
-      $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
+    TARGET_INCLUDE_DIRECTORIES(pcre2-posix-static PUBLIC ${PROJECT_BINARY_DIR})
     set(targets ${targets} pcre2-posix-static)
 
     IF(MSVC)
@@ -731,9 +725,7 @@ IF(PCRE2_BUILD_PCRE2_8)
 
   IF(BUILD_SHARED_LIBS)
     ADD_LIBRARY(pcre2-8-shared SHARED ${PCRE2_HEADERS} ${PCRE2_SOURCES} ${PROJECT_BINARY_DIR}/config.h)
-    TARGET_INCLUDE_DIRECTORIES(pcre2-8-shared PUBLIC
-      $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>
-      $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
+    TARGET_INCLUDE_DIRECTORIES(pcre2-8-shared PUBLIC ${PROJECT_BINARY_DIR})
     SET_TARGET_PROPERTIES(pcre2-8-shared PROPERTIES
       COMPILE_DEFINITIONS PCRE2_CODE_UNIT_WIDTH=8
       MACHO_COMPATIBILITY_VERSION "${LIBPCRE2_8_MACHO_COMPATIBILITY_VERSION}"
@@ -747,9 +739,7 @@ IF(PCRE2_BUILD_PCRE2_8)
     set(targets ${targets} pcre2-8-shared)
 
     ADD_LIBRARY(pcre2-posix-shared SHARED ${PCRE2POSIX_HEADERS} ${PCRE2POSIX_SOURCES})
-    TARGET_INCLUDE_DIRECTORIES(pcre2-posix-shared PUBLIC
-      $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>
-      $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
+    TARGET_INCLUDE_DIRECTORIES(pcre2-posix-shared PUBLIC ${PROJECT_BINARY_DIR})
     SET_TARGET_PROPERTIES(pcre2-posix-shared PROPERTIES
       COMPILE_DEFINITIONS PCRE2_CODE_UNIT_WIDTH=8
       MACHO_COMPATIBILITY_VERSION "${LIBPCRE2_POSIX_MACHO_COMPATIBILITY_VERSION}"
@@ -788,9 +778,7 @@ ENDIF(PCRE2_BUILD_PCRE2_8)
 IF(PCRE2_BUILD_PCRE2_16)
   IF(BUILD_STATIC_LIBS)
     ADD_LIBRARY(pcre2-16-static STATIC ${PCRE2_HEADERS} ${PCRE2_SOURCES} ${PROJECT_BINARY_DIR}/config.h)
-    TARGET_INCLUDE_DIRECTORIES(pcre2-16-static PUBLIC
-      $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>
-      $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
+    TARGET_INCLUDE_DIRECTORIES(pcre2-16-static PUBLIC ${PROJECT_BINARY_DIR})
     SET_TARGET_PROPERTIES(pcre2-16-static PROPERTIES UNITY_BUILD OFF
       COMPILE_DEFINITIONS PCRE2_CODE_UNIT_WIDTH=16
       MACHO_COMPATIBILITY_VERSION "${LIBPCRE2_32_MACHO_COMPATIBILITY_VERSION}"
@@ -815,9 +803,7 @@ IF(PCRE2_BUILD_PCRE2_16)
 
   IF(BUILD_SHARED_LIBS)
     ADD_LIBRARY(pcre2-16-shared SHARED ${PCRE2_HEADERS} ${PCRE2_SOURCES} ${PROJECT_BINARY_DIR}/config.h)
-    TARGET_INCLUDE_DIRECTORIES(pcre2-16-shared PUBLIC
-      $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>
-      $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
+    TARGET_INCLUDE_DIRECTORIES(pcre2-16-shared PUBLIC ${PROJECT_BINARY_DIR})
     SET_TARGET_PROPERTIES(pcre2-16-shared PROPERTIES UNITY_BUILD OFF
       COMPILE_DEFINITIONS PCRE2_CODE_UNIT_WIDTH=16
       MACHO_COMPATIBILITY_VERSION "${LIBPCRE2_32_MACHO_COMPATIBILITY_VERSION}"
@@ -854,9 +840,7 @@ ENDIF(PCRE2_BUILD_PCRE2_16)
 IF(PCRE2_BUILD_PCRE2_32)
   IF(BUILD_STATIC_LIBS)
     ADD_LIBRARY(pcre2-32-static STATIC ${PCRE2_HEADERS} ${PCRE2_SOURCES} ${PROJECT_BINARY_DIR}/config.h)
-    TARGET_INCLUDE_DIRECTORIES(pcre2-32-static PUBLIC
-      $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>
-      $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
+    TARGET_INCLUDE_DIRECTORIES(pcre2-32-static PUBLIC ${PROJECT_BINARY_DIR})
     SET_TARGET_PROPERTIES(pcre2-32-static PROPERTIES UNITY_BUILD OFF
       COMPILE_DEFINITIONS PCRE2_CODE_UNIT_WIDTH=32
       MACHO_COMPATIBILITY_VERSION "${LIBPCRE2_32_MACHO_COMPATIBILITY_VERSION}"
@@ -881,9 +865,7 @@ IF(PCRE2_BUILD_PCRE2_32)
 
   IF(BUILD_SHARED_LIBS)
     ADD_LIBRARY(pcre2-32-shared SHARED ${PCRE2_HEADERS} ${PCRE2_SOURCES} ${PROJECT_BINARY_DIR}/config.h)
-    TARGET_INCLUDE_DIRECTORIES(pcre2-32-shared PUBLIC
-      $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}>
-      $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
+    TARGET_INCLUDE_DIRECTORIES(pcre2-32-shared PUBLIC ${PROJECT_BINARY_DIR})
     SET_TARGET_PROPERTIES(pcre2-32-shared PROPERTIES UNITY_BUILD OFF
       COMPILE_DEFINITIONS PCRE2_CODE_UNIT_WIDTH=32
       MACHO_COMPATIBILITY_VERSION "${LIBPCRE2_32_MACHO_COMPATIBILITY_VERSION}"
@@ -1124,13 +1106,9 @@ ENDIF(PCRE2_BUILD_TESTS)
 SET(CMAKE_INSTALL_ALWAYS 1)
 
 INSTALL(TARGETS ${targets}
-        EXPORT pcre2-targets
-        RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+        RUNTIME DESTINATION bin
         LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
         ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
-INSTALL(EXPORT pcre2-targets
-        DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/pcre2
-        NAMESPACE pcre2::)
 INSTALL(FILES ${pkg_config_files} DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 INSTALL(FILES "${CMAKE_CURRENT_BINARY_DIR}/pcre2-config"
   DESTINATION bin
@@ -1142,12 +1120,11 @@ INSTALL(FILES ${PCRE2_HEADERS} ${PCRE2POSIX_HEADERS} DESTINATION include)
 # CMake config files.
 set(PCRE2_CONFIG_IN  ${CMAKE_CURRENT_SOURCE_DIR}/cmake/pcre2-config.cmake.in)
 set(PCRE2_CONFIG_OUT ${CMAKE_CURRENT_BINARY_DIR}/cmake/pcre2-config.cmake)
-configure_package_config_file(${PCRE2_CONFIG_IN} ${PCRE2_CONFIG_OUT} INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/pcre2)
+configure_file(${PCRE2_CONFIG_IN} ${PCRE2_CONFIG_OUT} @ONLY)
+set(PCRE2_CONFIG_VERSION_IN  ${CMAKE_CURRENT_SOURCE_DIR}/cmake/pcre2-config-version.cmake.in)
 set(PCRE2_CONFIG_VERSION_OUT ${CMAKE_CURRENT_BINARY_DIR}/cmake/pcre2-config-version.cmake)
-write_basic_package_version_file(${PCRE2_CONFIG_VERSION_OUT}
-                                 VERSION ${PCRE2_MAJOR}.${PCRE2_MINOR}.0
-                                 COMPATIBILITY SameMajorVersion)
-install(FILES ${PCRE2_CONFIG_OUT} ${PCRE2_CONFIG_VERSION_OUT} DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/pcre2)
+configure_file(${PCRE2_CONFIG_VERSION_IN} ${PCRE2_CONFIG_VERSION_OUT} @ONLY)
+install(FILES ${PCRE2_CONFIG_OUT} ${PCRE2_CONFIG_VERSION_OUT} DESTINATION cmake)
 
 FILE(GLOB html ${PROJECT_SOURCE_DIR}/doc/html/*.html)
 FILE(GLOB man1 ${PROJECT_SOURCE_DIR}/doc/*.1)

ChangeLog

@@ -95,11 +95,10 @@ string.
 default maximum length 255 characters (same as Perl) but with a function to
 adjust the limit.
 
-25. Applied pull request #260, which modernizes the CMake files, also #262,
-which updates the zig configuration, and #278 which fixes a bug with out-of-
-source-tree CMake build testing.
+25. Applied pull request #262, which updates the zig configuration, and #278
+which fixes a bug with out-of-source-tree CMake build testing.
 
-26. Add support for LoongArch in JIT.
+26. Add support for LoongArch to JIT.
 
 27. Fixed a bug in pcre2_match() in the code for handling the vector of
 backtracking frames on the heap, which caused a heap overflow if *LIMIT_HEAP

cmake/pcre2-config-version.cmake.in

@@ -0,0 +1,15 @@
+set(PACKAGE_VERSION_MAJOR @PCRE2_MAJOR@)
+set(PACKAGE_VERSION_MINOR @PCRE2_MINOR@)
+set(PACKAGE_VERSION_PATCH 0)
+set(PACKAGE_VERSION @PCRE2_MAJOR@.@PCRE2_MINOR@.0)
+
+# Check whether the requested PACKAGE_FIND_VERSION is compatible
+if(PACKAGE_VERSION VERSION_LESS PACKAGE_FIND_VERSION OR
+   PACKAGE_VERSION_MAJOR GREATER PACKAGE_FIND_VERSION_MAJOR)
+  set(PACKAGE_VERSION_COMPATIBLE FALSE)
+else()
+  set(PACKAGE_VERSION_COMPATIBLE TRUE)
+  if(PACKAGE_VERSION VERSION_EQUAL PACKAGE_FIND_VERSION)
+    set(PACKAGE_VERSION_EXACT TRUE)
+  endif()
+endif()

cmake/pcre2-config.cmake.in

@@ -5,17 +5,11 @@
 #
 # Static vs. shared
 # -----------------
-# To force using the static library instead of the shared one, one needs
+# To make use of the static library instead of the shared one, one needs
 # to set the variable PCRE2_USE_STATIC_LIBS to ON before calling find_package.
-# If the variable is not set, the static library will be used if only that has
-# been built, otherwise the shared library will be used.
-#
-# The following components are supported: 8BIT, 16BIT, 32BIT and POSIX.
-# They used to be required but not anymore; all available targets will
-# be defined regardless of the requested components.
 # Example:
 #   set(PCRE2_USE_STATIC_LIBS ON)
-#   find_package(PCRE2 CONFIG)
+#   find_package(PCRE2 CONFIG COMPONENTS 8BIT)
 #
 # This will define the following variables:
 #
@@ -29,42 +23,70 @@
 #   PCRE2::32BIT - The 32 bit PCRE2 library.
 #   PCRE2::POSIX - The POSIX PCRE2 library.
 
-@PACKAGE_INIT@
+set(PCRE2_NON_STANDARD_LIB_PREFIX @NON_STANDARD_LIB_PREFIX@)
+set(PCRE2_NON_STANDARD_LIB_SUFFIX @NON_STANDARD_LIB_SUFFIX@)
+set(PCRE2_8BIT_NAME pcre2-8)
+set(PCRE2_16BIT_NAME pcre2-16)
+set(PCRE2_32BIT_NAME pcre2-32)
+set(PCRE2_POSIX_NAME pcre2-posix)
+find_path(PCRE2_INCLUDE_DIR NAMES pcre2.h DOC "PCRE2 include directory")
+if (PCRE2_USE_STATIC_LIBS)
+  if (MSVC)
+    set(PCRE2_8BIT_NAME pcre2-8-static)
+    set(PCRE2_16BIT_NAME pcre2-16-static)
+    set(PCRE2_32BIT_NAME pcre2-32-static)
+    set(PCRE2_POSIX_NAME pcre2-posix-static)
+  endif ()
 
-include(CMakeFindDependencyMacro)
-if("@REQUIRE_PTHREAD@") # REQUIRE_PTHREAD
-  find_dependency(Threads)
-endif()
+  set(PCRE2_PREFIX ${CMAKE_STATIC_LIBRARY_PREFIX})
+  set(PCRE2_SUFFIX ${CMAKE_STATIC_LIBRARY_SUFFIX})
+else ()
+  set(PCRE2_PREFIX ${CMAKE_SHARED_LIBRARY_PREFIX})
+  if (MINGW AND PCRE2_NON_STANDARD_LIB_PREFIX)
+    set(PCRE2_PREFIX "")
+  endif ()
 
-include("${CMAKE_CURRENT_LIST_DIR}/pcre2-targets.cmake")
+  set(PCRE2_SUFFIX ${CMAKE_SHARED_LIBRARY_SUFFIX})
+  if (MINGW AND PCRE2_NON_STANDARD_LIB_SUFFIX)
+    set(PCRE2_SUFFIX "-0.dll")
+  endif ()
+endif ()
+find_library(PCRE2_8BIT_LIBRARY NAMES ${PCRE2_PREFIX}${PCRE2_8BIT_NAME}${PCRE2_SUFFIX} ${PCRE2_PREFIX}${PCRE2_8BIT_NAME}d${PCRE2_SUFFIX} DOC "8 bit PCRE2 library")
+find_library(PCRE2_16BIT_LIBRARY NAMES ${PCRE2_PREFIX}${PCRE2_16BIT_NAME}${PCRE2_SUFFIX} ${PCRE2_PREFIX}${PCRE2_8BIT_NAME}d${PCRE2_SUFFIX} DOC "16 bit PCRE2 library")
+find_library(PCRE2_32BIT_LIBRARY NAMES ${PCRE2_PREFIX}${PCRE2_32BIT_NAME}${PCRE2_SUFFIX} ${PCRE2_PREFIX}${PCRE2_8BIT_NAME}d${PCRE2_SUFFIX} DOC "32 bit PCRE2 library")
+find_library(PCRE2_POSIX_LIBRARY NAMES ${PCRE2_PREFIX}${PCRE2_POSIX_NAME}${PCRE2_SUFFIX} ${PCRE2_PREFIX}${PCRE2_8BIT_NAME}d${PCRE2_SUFFIX} DOC "8 bit POSIX PCRE2 library")
+unset(PCRE2_NON_STANDARD_LIB_PREFIX)
+unset(PCRE2_NON_STANDARD_LIB_SUFFIX)
+unset(PCRE2_8BIT_NAME)
+unset(PCRE2_16BIT_NAME)
+unset(PCRE2_32BIT_NAME)
+unset(PCRE2_POSIX_NAME)
 
 # Set version
-set(PCRE2_VERSION "@PCRE2_MAJOR@.@PCRE2_MINOR@.0")
+if (PCRE2_INCLUDE_DIR)
+  set(PCRE2_VERSION "@PCRE2_MAJOR@.@PCRE2_MINOR@.0")
+endif ()
 
-# Chooses the linkage of the library to expose in the
-# unsuffixed edition of the target.
-macro(_pcre2_add_component_target component target)
-  # If the static library exists and either PCRE2_USE_STATIC_LIBS
-  # is defined, or the dynamic library does not exist, use the static library.
-  if(NOT TARGET PCRE2::${component})
-    if(TARGET pcre2::pcre2-${target}-static AND (PCRE2_USE_STATIC_LIBS OR NOT TARGET pcre2::pcre2-${target}-shared))
-      add_library(PCRE2::${component} ALIAS pcre2::pcre2-${target}-static)
-      set(PCRE2_${component}_FOUND TRUE)
-    # Otherwise use the dynamic library if it exists.
-    elseif(TARGET pcre2::pcre2-${target}-shared AND NOT PCRE2_USE_STATIC_LIBS)
-      add_library(PCRE2::${component} ALIAS pcre2::pcre2-${target}-shared)
-      set(PCRE2_${component}_FOUND TRUE)
-    endif()
-    if(PCRE2_${component}_FOUND)
-      get_target_property(PCRE2_${component}_LIBRARY PCRE2::${component} IMPORTED_LOCATION)
-      set(PCRE2_LIBRARIES ${PCRE2_LIBRARIES} ${PCRE2_${component}_LIBRARY})
-    endif()
-  endif()
-endmacro()
-_pcre2_add_component_target(8BIT 8)
-_pcre2_add_component_target(16BIT 16)
-_pcre2_add_component_target(32BIT 32)
-_pcre2_add_component_target(POSIX posix)
+# Which components have been found.
+if (PCRE2_8BIT_LIBRARY)
+  set(PCRE2_8BIT_FOUND TRUE)
+endif ()
+if (PCRE2_16BIT_LIBRARY)
+  set(PCRE2_16BIT_FOUND TRUE)
+endif ()
+if (PCRE2_32BIT_LIBRARY)
+  set(PCRE2_32BIT_FOUND TRUE)
+endif ()
+if (PCRE2_POSIX_LIBRARY)
+  set(PCRE2_POSIX_FOUND TRUE)
+endif ()
+
+# Check if at least one component has been specified.
+list(LENGTH PCRE2_FIND_COMPONENTS PCRE2_NCOMPONENTS)
+if (PCRE2_NCOMPONENTS LESS 1)
+  message(FATAL_ERROR "No components have been specified. This is not allowed. Please, specify at least one component.")
+endif ()
+unset(PCRE2_NCOMPONENTS)
 
 # When POSIX component has been specified make sure that also 8BIT component is specified.
 set(PCRE2_8BIT_COMPONENT FALSE)
@@ -83,5 +105,41 @@ endif()
 unset(PCRE2_8BIT_COMPONENT)
 unset(PCRE2_POSIX_COMPONENT)
 
-# Check for required components.
-check_required_components("PCRE2")
+include(FindPackageHandleStandardArgs)
+set(${CMAKE_FIND_PACKAGE_NAME}_CONFIG "${CMAKE_CURRENT_LIST_FILE}")
+find_package_handle_standard_args(PCRE2
+  FOUND_VAR PCRE2_FOUND
+  REQUIRED_VARS PCRE2_INCLUDE_DIR
+  HANDLE_COMPONENTS
+  VERSION_VAR PCRE2_VERSION
+  CONFIG_MODE
+)
+
+set(PCRE2_LIBRARIES)
+if (PCRE2_FOUND)
+  foreach(component ${PCRE2_FIND_COMPONENTS})
+    if (PCRE2_USE_STATIC_LIBS)
+      add_library(PCRE2::${component} STATIC IMPORTED)
+      target_compile_definitions(PCRE2::${component} INTERFACE PCRE2_STATIC)
+    else ()
+      add_library(PCRE2::${component} SHARED IMPORTED)
+    endif ()
+    set_target_properties(PCRE2::${component} PROPERTIES
+      IMPORTED_LOCATION "${PCRE2_${component}_LIBRARY}"
+      INTERFACE_INCLUDE_DIRECTORIES "${PCRE2_INCLUDE_DIR}"
+    )
+    if (component STREQUAL "POSIX")
+      set_target_properties(PCRE2::${component} PROPERTIES
+        INTERFACE_LINK_LIBRARIES "PCRE2::8BIT"
+        LINK_LIBRARIES "PCRE2::8BIT"
+      )
+    endif ()
+
+    set(PCRE2_LIBRARIES ${PCRE2_LIBRARIES} ${PCRE2_${component}_LIBRARY})
+    mark_as_advanced(PCRE2_${component}_LIBRARY)
+  endforeach()
+endif ()
+
+mark_as_advanced(
+  PCRE2_INCLUDE_DIR
+)