From 0a924aea4deb936709ada4d23a131759b17d242d Mon Sep 17 00:00:00 2001
From: Davide Beatrici <git@davidebeatrici.dev>
Date: Sat, 27 Feb 2021 20:52:44 +0100
Subject: [PATCH] CMake: Build hamcore.se2 only when related files change

Previously, the file was rebuilt even if no changes were made to the source files.
---
 src/CMakeLists.txt | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index ff3da41d..951595e4 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -144,9 +144,15 @@ add_subdirectory(vpntest)
 # hamcore.se2 archive file
 add_custom_target(hamcore-archive-build
   ALL
-  COMMAND hamcorebuilder "${BUILD_DIRECTORY}/hamcore.se2" "${TOP_DIRECTORY}/src/bin/hamcore"
-  DEPENDS hamcorebuilder
+  DEPENDS "${BUILD_DIRECTORY}/hamcore.se2"
+)
+
+add_custom_command(
   COMMENT "Building hamcore.se2 archive file..."
+  COMMAND hamcorebuilder "hamcore.se2" "${TOP_DIRECTORY}/src/bin/hamcore"
+  DEPENDS hamcorebuilder "${TOP_DIRECTORY}/src/bin/hamcore/"
+  OUTPUT "${BUILD_DIRECTORY}/hamcore.se2"
+  WORKING_DIRECTORY "${BUILD_DIRECTORY}"
   VERBATIM
 )