From 0d349fcee81d566c0ec615ae5be4842a1bc9fa03 Mon Sep 17 00:00:00 2001
From: Matthias Wittgen <Matthias.Michael.Wittgen@CERN.CH>
Date: Wed, 28 Oct 2026 07:12:50 -0700
Subject: [PATCH] Configure through a pkg-config template

---
 .gitignore           |  3 +++
 SConstruct           |  2 +-
 lsst_ip_diffim.pc.in | 12 ++++++++++++
 ups/ip_diffim.cfg    | 14 --------------
 4 files changed, 16 insertions(+), 15 deletions(-)
 create mode 100644 lsst_ip_diffim.pc.in
 delete mode 100644 ups/ip_diffim.cfg

diff --git a/.gitignore b/.gitignore
index 30779b93a..941d499d9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -29,3 +29,6 @@ tests/SpatialModelVisitors_1
 tests/basisSetRegMatrix
 .coverage*
 python/*.dist-info/
+
+# Generated by sconsUtils from lsst_ip_diffim.pc.in
+lib/pkgconfig/
diff --git a/SConstruct b/SConstruct
index dd17de47d..072744cca 100644
--- a/SConstruct
+++ b/SConstruct
@@ -1,3 +1,3 @@
 # -*- python -*-
 from lsst.sconsUtils import scripts
-scripts.BasicSConstruct("ip_diffim")
+scripts.BasicSConstruct("ip_diffim", noCfgFile=True)
diff --git a/lsst_ip_diffim.pc.in b/lsst_ip_diffim.pc.in
new file mode 100644
index 000000000..1c7ea9cfe
--- /dev/null
+++ b/lsst_ip_diffim.pc.in
@@ -0,0 +1,12 @@
+prefix=${pcfiledir}/../..
+includedir=${prefix}/include
+libdir=${prefix}/lib
+doxygen_tag=${prefix}/doc/ip_diffim.tag
+lsst_build_requires=boost_timer pybind11 python3
+
+Name: lsst_ip_diffim
+Description: LSST Science Pipelines image differencing
+Version: @VERSION@
+Requires: lsst_meas_base lsst_afw numpy minuit2 lsst_log lsst_daf_base
+Cflags: -I${includedir}
+Libs: -L${libdir} -lip_diffim
diff --git a/ups/ip_diffim.cfg b/ups/ip_diffim.cfg
deleted file mode 100644
index 09367a98e..000000000
--- a/ups/ip_diffim.cfg
+++ /dev/null
@@ -1,14 +0,0 @@
-# -*- python -*-
-
-import lsst.sconsUtils
-
-dependencies = {
-    "required": ["meas_base", "afw", "numpy", "minuit2", "log", "daf_base"],
-    "buildRequired": ["boost_timer", "pybind11"],
-}
-
-config = lsst.sconsUtils.Configuration(
-    __file__,
-    headers=["lsst/ip/diffim.h"],
-    hasDoxygenInclude=False,
-)