From bd8b03ed23561786e1221251b9558bb33634e041 Mon Sep 17 00:00:00 2001
From: "Jack S. Hale" <mail@jackhale.co.uk>
Date: Wed, 8 Jul 2026 13:02:38 +0200
Subject: [PATCH 1/3] Modernise, used Claude Sonnet 4.6

---
 src/CMakeLists.txt | 64 +++++++++++++++++++++++++++-------------------
 1 file changed, 37 insertions(+), 27 deletions(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 2f3f360..b300725 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,53 +1,63 @@
 cmake_minimum_required(VERSION 3.16)
 
-set(PROJECT_NAME dolfinx-scaling-test)
-project(${PROJECT_NAME})
+project(dolfinx-scaling-test)
 
 include(GNUInstallDirs)
-set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)
 
-# Use C++20
-set(CMAKE_CXX_STANDARD 20)
-set(CMAKE_CXX_STANDARD_REQUIRED ON)
-set(CMAKE_CXX_EXTENSIONS OFF)
-
-# Get DOLFIN configuration data (DOLFINConfig.cmake must be in
-# DOLFIN_CMAKE_CONFIG_PATH)
 find_package(DOLFINX REQUIRED)
-
-set(CMAKE_CXX_FLAGS "-O3 -ffast-math ${CMAKE_CXX_FLAGS} -g -Wall")
-set(CMAKE_C_FLAGS "-O3 -ffast-math ${CMAKE_C_FLAGS} -g -Wall")
+find_package(Threads REQUIRED)
 
 # Compile UFL files
 add_custom_command(
   OUTPUT Poisson.c
   COMMAND ffcx ${CMAKE_CURRENT_SOURCE_DIR}/Poisson.py
-  DEPENDS Poisson.py
+  DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/Poisson.py
+  VERBATIM
 )
 
 add_custom_command(
   OUTPUT Elasticity.c
   COMMAND ffcx ${CMAKE_CURRENT_SOURCE_DIR}/Elasticity.py
-  DEPENDS Elasticity.py
+  DEPENDS ${CMAKE_CURRENT_SOURCE_DIR}/Elasticity.py
+  VERBATIM
 )
 
-set(CMAKE_INCLUDE_CURRENT_DIR ON)
-
-# Executable
-add_executable(${PROJECT_NAME} main.cpp mesh.cpp elasticity_problem.cpp cgpoisson_problem.cpp poisson_problem.cpp mem.cpp
-${CMAKE_CURRENT_BINARY_DIR}/Elasticity.c
-${CMAKE_CURRENT_BINARY_DIR}/Poisson.c)
-
 # Find Boost program_options
 if(DEFINED ENV{BOOST_ROOT} OR DEFINED BOOST_ROOT)
-  set(Boost_NO_SYSTEM_PATHS on)
+  set(Boost_NO_SYSTEM_PATHS ON)
 endif()
-# set(Boost_USE_MULTITHREADED $ENV{BOOST_USE_MULTITHREADED})
 set(Boost_VERBOSE TRUE)
 find_package(Boost 1.70 REQUIRED program_options)
 
-# Target libraries
-target_link_libraries(${PROJECT_NAME} dolfinx Boost::program_options pthread)
+add_executable(${PROJECT_NAME}
+  main.cpp
+  mesh.cpp
+  elasticity_problem.cpp
+  cgpoisson_problem.cpp
+  poisson_problem.cpp
+  mem.cpp
+  ${CMAKE_CURRENT_BINARY_DIR}/Elasticity.c
+  ${CMAKE_CURRENT_BINARY_DIR}/Poisson.c
+)
+
+set_target_properties(${PROJECT_NAME} PROPERTIES
+  CXX_STANDARD 20
+  CXX_STANDARD_REQUIRED ON
+  CXX_EXTENSIONS OFF
+  INSTALL_RPATH_USE_LINK_PATH TRUE
+)
+
+set(COMPILE_FLAGS -O3 -ffast-math -g -Wall)
+target_compile_options(${PROJECT_NAME} PRIVATE ${COMPILE_FLAGS})
+
+target_include_directories(${PROJECT_NAME} PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
+
+target_link_libraries(${PROJECT_NAME}
+  dolfinx::dolfinx
+  Boost::program_options
+  Threads::Threads
+)
+
+message(STATUS "Compile flags: ${COMPILE_FLAGS}")
 
-message(STATUS ${CMAKE_CXX_FLAGS})
 install(TARGETS ${PROJECT_NAME} RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})

From daf0b08fd195d9a793b52214017880e1072523dc Mon Sep 17 00:00:00 2001
From: "Jack S. Hale" <mail@jackhale.co.uk>
Date: Wed, 8 Jul 2026 13:03:30 +0200
Subject: [PATCH 2/3] Run gersemi

---
 .gersemirc         |  1 +
 src/CMakeLists.txt | 18 +++++++++++-------
 2 files changed, 12 insertions(+), 7 deletions(-)
 create mode 100644 .gersemirc

diff --git a/.gersemirc b/.gersemirc
new file mode 100644
index 0000000..bfa2d92
--- /dev/null
+++ b/.gersemirc
@@ -0,0 +1 @@
+indent: 2
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index b300725..936434d 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -29,7 +29,8 @@ endif()
 set(Boost_VERBOSE TRUE)
 find_package(Boost 1.70 REQUIRED program_options)
 
-add_executable(${PROJECT_NAME}
+add_executable(
+  ${PROJECT_NAME}
   main.cpp
   mesh.cpp
   elasticity_problem.cpp
@@ -40,11 +41,13 @@ add_executable(${PROJECT_NAME}
   ${CMAKE_CURRENT_BINARY_DIR}/Poisson.c
 )
 
-set_target_properties(${PROJECT_NAME} PROPERTIES
-  CXX_STANDARD 20
-  CXX_STANDARD_REQUIRED ON
-  CXX_EXTENSIONS OFF
-  INSTALL_RPATH_USE_LINK_PATH TRUE
+set_target_properties(
+  ${PROJECT_NAME}
+  PROPERTIES
+    CXX_STANDARD 20
+    CXX_STANDARD_REQUIRED ON
+    CXX_EXTENSIONS OFF
+    INSTALL_RPATH_USE_LINK_PATH TRUE
 )
 
 set(COMPILE_FLAGS -O3 -ffast-math -g -Wall)
@@ -52,7 +55,8 @@ target_compile_options(${PROJECT_NAME} PRIVATE ${COMPILE_FLAGS})
 
 target_include_directories(${PROJECT_NAME} PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
 
-target_link_libraries(${PROJECT_NAME}
+target_link_libraries(
+  ${PROJECT_NAME}
   dolfinx::dolfinx
   Boost::program_options
   Threads::Threads

From b9209031a8de7fbc60045f29180aa85bdf310121 Mon Sep 17 00:00:00 2001
From: "Jack S. Hale" <mail@jackhale.co.uk>
Date: Wed, 8 Jul 2026 13:14:27 +0200
Subject: [PATCH 3/3] Use cxx_std20

---
 src/CMakeLists.txt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 936434d..629b4ef 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -41,11 +41,11 @@ add_executable(
   ${CMAKE_CURRENT_BINARY_DIR}/Poisson.c
 )
 
+target_compile_features(${PROJECT_NAME} PRIVATE cxx_std_20)
+
 set_target_properties(
   ${PROJECT_NAME}
   PROPERTIES
-    CXX_STANDARD 20
-    CXX_STANDARD_REQUIRED ON
     CXX_EXTENSIONS OFF
     INSTALL_RPATH_USE_LINK_PATH TRUE
 )