$NetBSD$

* Install date.pc for pkg-config
  from Arch Linux

--- CMakeLists.txt.orig	2025-05-28 17:53:02.000000000 +0000
+++ CMakeLists.txt
@@ -186,6 +186,15 @@ if( BUILD_TZ_LIB )
     endif( )
 endif( )
 
+if ( BUILD_TZ_LIB )
+  # Cflags: -I${includedir} @TZ_COMPILE_DEFINITIONS@
+  set( TZ_COMPILE_DEFINITIONS "$<IF:$<TARGET_EXISTS:date-tz>,-D$<JOIN:$<TARGET_PROPERTY:date-tz,INTERFACE_COMPILE_DEFINITIONS>, -D>,>" )
+  configure_file(date.pc.in date.pc.cf @ONLY)
+  file( GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/date.pc"
+    INPUT "${CMAKE_CURRENT_BINARY_DIR}/date.pc.cf" )
+
+endif( )
+
 #[===================================================================[
    installation
 #]===================================================================]
@@ -231,6 +240,12 @@ if( ENABLE_DATE_INSTALL )
     DESTINATION ${CONFIG_LOC})
 endif( )
 
+if ( BUILD_TZ_LIB )
+  install(
+    FILES ${CMAKE_BINARY_DIR}/date.pc
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
+endif( )
+
 #[===================================================================[
    testing
 #]===================================================================]