From 716c53052b77b4656b28b4bc16399313e07286c2 Mon Sep 17 00:00:00 2001
From: Sebastian Pipping <sebastian@pipping.org>
Date: Thu, 29 Aug 2019 23:47:01 +0200
Subject: [PATCH] CMake: Provide files for config-mode find_package

---
 expat/CMakeLists.txt              | 39 +++++++++++++++++++-
 expat/Changes                     |  2 +
 expat/Makefile.am                 |  2 +
 expat/cmake/.gitignore            |  3 ++
 expat/cmake/expat-config.cmake.in | 61 +++++++++++++++++++++++++++++++
 expat/win32/expat.iss             |  1 +
 6 files changed, 107 insertions(+), 1 deletion(-)
 create mode 100644 expat/cmake/.gitignore
 create mode 100644 expat/cmake/expat-config.cmake.in

diff --git a/expat/CMakeLists.txt b/expat/CMakeLists.txt
index 9730bf00..ed9e8171 100644
--- a/expat/CMakeLists.txt
+++ b/expat/CMakeLists.txt
@@ -16,6 +16,7 @@ set(PACKAGE_VERSION "${PROJECT_VERSION}")
 set(PACKAGE_STRING "${PACKAGE_NAME} ${PACKAGE_VERSION}")
 set(PACKAGE_TARNAME "${PACKAGE_NAME}")
 
+include(CMakePackageConfigHelpers)
 include(GNUInstallDirs)
 
 #
@@ -251,7 +252,8 @@ if(NOT WIN32)
     set_property(TARGET expat PROPERTY NO_SONAME ${NO_SONAME})
 endif(NOT WIN32)
 
-expat_install(TARGETS expat RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+expat_install(TARGETS expat EXPORT expat
+                      RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
                       LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
                       ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
 
@@ -376,6 +378,41 @@ expat_install(
     DESTINATION
         ${CMAKE_INSTALL_DOCDIR})
 
+#
+# CMake files for find_package(expat [..] CONFIG [..])
+#
+configure_package_config_file(
+        cmake/expat-config.cmake.in
+        cmake/expat-config.cmake
+    INSTALL_DESTINATION
+        ${CMAKE_INSTALL_LIBDIR}/cmake/expat-${PROJECT_VERSION}/
+)
+write_basic_package_version_file(
+    cmake/expat-config-version.cmake
+    COMPATIBILITY SameMajorVersion  # i.e. semver
+)
+export(
+    TARGETS
+        expat
+    FILE
+        cmake/expat-targets.cmake  # not going to be installed
+)
+expat_install(
+    FILES
+        ${CMAKE_CURRENT_BINARY_DIR}/cmake/expat-config.cmake
+        ${CMAKE_CURRENT_BINARY_DIR}/cmake/expat-config-version.cmake
+    DESTINATION
+        ${CMAKE_INSTALL_LIBDIR}/cmake/expat-${PROJECT_VERSION}/
+)
+expat_install(
+    EXPORT
+        expat
+    DESTINATION
+        ${CMAKE_INSTALL_LIBDIR}/cmake/expat-${PROJECT_VERSION}/
+    NAMESPACE
+        expat::
+)
+
 #
 # Summary
 #
diff --git a/expat/Changes b/expat/Changes
index d50ec869..5886b54e 100644
--- a/expat/Changes
+++ b/expat/Changes
@@ -29,6 +29,8 @@ Release x.x.x xxx xxx xx xxxx
                     -DUSE_SYS_GETRANDOM=(ON|OFF|AUTO)
                   CMake: Add argument -DXML_LARGE_SIZE=ON
                   CMake: Install expat_config.h to include directory
+                  CMake: Generate and install configuration files for
+                    future find_package(expat [..] CONFIG [..])
                   CMake: Now produces a summary of applied configuration
                   CMake: Require C++ compiler only when tests are enabled
             #265  CMake: Fix linking with MinGW
diff --git a/expat/Makefile.am b/expat/Makefile.am
index 561e2f1f..c3825e84 100644
--- a/expat/Makefile.am
+++ b/expat/Makefile.am
@@ -54,6 +54,8 @@ pkgconfigdir = $(libdir)/pkgconfig
 
 
 _EXTRA_DIST_CMAKE = \
+    cmake/expat-config.cmake.in \
+    \
     CMakeLists.txt \
     CMake.README \
     ConfigureChecks.cmake \
diff --git a/expat/cmake/.gitignore b/expat/cmake/.gitignore
new file mode 100644
index 00000000..89c8a280
--- /dev/null
+++ b/expat/cmake/.gitignore
@@ -0,0 +1,3 @@
+/expat-config.cmake
+/expat-config-version.cmake
+/expat-targets.cmake
diff --git a/expat/cmake/expat-config.cmake.in b/expat/cmake/expat-config.cmake.in
new file mode 100644
index 00000000..79af6aa3
--- /dev/null
+++ b/expat/cmake/expat-config.cmake.in
@@ -0,0 +1,61 @@
+#                          __  __            _
+#                       ___\ \/ /_ __   __ _| |_
+#                      / _ \\  /| '_ \ / _` | __|
+#                     |  __//  \| |_) | (_| | |_
+#                      \___/_/\_\ .__/ \__,_|\__|
+#                               |_| XML parser
+#
+# Copyright (c) 2019 Expat development team
+# Licensed under the MIT license:
+#
+# Permission is  hereby granted,  free of charge,  to any  person obtaining
+# a  copy  of  this  software   and  associated  documentation  files  (the
+# "Software"),  to  deal in  the  Software  without restriction,  including
+# without  limitation the  rights  to use,  copy,  modify, merge,  publish,
+# distribute, sublicense, and/or sell copies of the Software, and to permit
+# persons  to whom  the Software  is  furnished to  do so,  subject to  the
+# following conditions:
+#
+# The above copyright  notice and this permission notice  shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE  SOFTWARE  IS  PROVIDED  "AS  IS",  WITHOUT  WARRANTY  OF  ANY  KIND,
+# EXPRESS  OR IMPLIED,  INCLUDING  BUT  NOT LIMITED  TO  THE WARRANTIES  OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+# NO EVENT SHALL THE AUTHORS OR  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+# DAMAGES OR  OTHER LIABILITY, WHETHER  IN AN  ACTION OF CONTRACT,  TORT OR
+# OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+# USE OR OTHER DEALINGS IN THE SOFTWARE.
+#
+if(NOT _expat_config_included)
+    # Protect against multiple inclusion
+    set(_expat_config_included TRUE)
+
+
+include("${CMAKE_CURRENT_LIST_DIR}/expat.cmake")
+
+@PACKAGE_INIT@
+
+#
+# Supported components
+#
+macro(_register_component _NAME _AVAILABE)
+    set(expat_${_NAME}_FOUND ${_AVAILABE})
+endmacro()
+
+_register_component(attr_info          @XML_ATTR_INFO@)
+if(@XML_CONTEXT_BYTES@)
+    _register_component(context_bytes  1)
+else()
+    _register_component(context_bytes  0)
+endif()
+_register_component(dtd                @XML_DTD@)
+_register_component(large_size         @XML_LARGE_SIZE@)
+_register_component(ns                 @XML_NS@)
+_register_component(unicode            @XML_UNICODE@)
+_register_component(unicode_wchar_t    @XML_UNICODE_WCHAR_T@)
+
+check_required_components(expat)
+
+
+endif(NOT _expat_config_included)
diff --git a/expat/win32/expat.iss b/expat/win32/expat.iss
index 8150166d..4863a7d8 100644
--- a/expat/win32/expat.iss
+++ b/expat/win32/expat.iss
@@ -49,6 +49,7 @@ Flags: ignoreversion; Source: CMake.README;                 DestDir: "{app}\Sour
 Flags: ignoreversion; Source: CMakeLists.txt;               DestDir: "{app}\Source"
 Flags: ignoreversion; Source: ConfigureChecks.cmake;        DestDir: "{app}\Source"
 Flags: ignoreversion; Source: expat_config.h.cmake;         DestDir: "{app}\Source"
+Flags: ignoreversion; Source: cmake/expat-config.cmake.in;  DestDir: "{app}\Source\cmake"
 Flags: ignoreversion; Source: lib\*.c;                      DestDir: "{app}\Source\lib"
 Flags: ignoreversion; Source: lib\*.h;                      DestDir: "{app}\Source\lib"
 Flags: ignoreversion; Source: lib\*.def;                    DestDir: "{app}\Source\lib"