Generate libdispatch.pc on non-apple platforms

CMakeLists.txt

@@ -88,6 +88,7 @@ include(DispatchSanitization)
 include(DispatchCompilerWarnings)
 include(DTrace)
 include(SwiftSupport)
+include(PkgConfigGeneration)
 
 # NOTE(abdulras) this is the CMake supported way to control whether we generate
 # shared or static libraries.  This impacts the behaviour of `add_library` in
@@ -285,7 +286,6 @@ else()
   set(INSTALL_OS_HEADERS_DIR "include/os" CACHE PATH "Path where the headers will be installed")
 endif()
 
-
 add_subdirectory(dispatch)
 add_subdirectory(man)
 add_subdirectory(os)

cmake/libdispatch.pc.in

@@ -0,0 +1,10 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+libdir=${exec_prefix}/@CMAKE_INSTALL_LIBDIR@
+includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
+
+Name: libdispatch
+Description: libdispatch (a.k.a. Grand Central Dispatch)
+Version: @PROJECT_VERSION@
+Libs: -L${libdir} -ldispatch
+Cflags: -I${includedir}

cmake/modules/PkgConfigGeneration.cmake

@@ -0,0 +1,18 @@
+#.rst:
+# PkgConfigGeneration
+# -------------------
+#
+# Generate the pkg-config file for libdispatch.
+#
+# The script generates a pkg-config file on non-Apple UNIX-like systems.
+#
+
+# Check if the system is UNIX-based and not Apple
+if(UNIX AND NOT APPLE)
+  # Configure the pkg-config file from the template
+  configure_file("${PROJECT_SOURCE_DIR}/cmake/libdispatch.pc.in"
+                 "${PROJECT_BINARY_DIR}/libdispatch.pc" @ONLY)
+
+  # Install the generated pkg-config file to the appropriate directory
+  install(FILES "${PROJECT_BINARY_DIR}/libdispatch.pc" DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+endif()