Also support creating relocatable pkgconfig

Using the pgk-config derived variable `pcfiledir` provides an option to create a package which the user can install to a location of their choosing. The prefix is determined at runtime from where the pkgconfig file is found. Signed-off-by: Eero Aaltonen <[email protected]>
docopt · Aug 17, 2023 · 9eba999 · 9eba999
1 parent 400e6dd
commit 9eba999
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Showing 2 changed files with 9 additions and 2 deletions.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -9,6 +9,7 @@ include(GNUInstallDirs)
 option(WITH_TESTS "Build tests." OFF)
 option(WITH_EXAMPLE "Build example." OFF)
 option(USE_BOOST_REGEX "Replace std::regex with Boost.Regex" OFF)
+option(PKGCONFIG_RELOCATABLE "Create a pkgconfig file with relocatable path" OFF)
 
 #============================================================================
 # Internal compiler options
@@ -105,6 +106,11 @@ write_basic_package_version_file("${PROJECT_BINARY_DIR}/docopt-config-version.cm
 install(FILES docopt-config.cmake ${PROJECT_BINARY_DIR}/docopt-config-version.cmake DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/docopt")
 install(EXPORT ${export_name} DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/docopt")
 
+if(PKGCONFIG_RELOCATABLE)
+	set(PKGCONFIG_PREFIX "\${pcfiledir}/../..")
+else()
+	set(PKGCONFIG_PREFIX "${CMAKE_INSTALL_PREFIX}")
+endif()
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/docopt.pc.in ${CMAKE_CURRENT_BINARY_DIR}/docopt.pc @ONLY)
 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/docopt.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 

diff --git a/docopt.pc.in b/docopt.pc.in
@@ -1,5 +1,6 @@
-libdir=@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBDIR@
-includedir=@CMAKE_INSTALL_PREFIX@/include/docopt
+prefix=@PKGCONFIG_PREFIX@
+libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
+includedir=${prefix}/include/docopt
 
 Name: docopt.cpp
 Description: C++11 port of docopt