From c1a7aeaa910aaa8b7d81dcf3680ef54f8bf34e81 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ole=20Sch=C3=BCtt?= <ole.schuett@cp2k.org>
Date: Sat, 29 Nov 2025 12:25:23 +0100
Subject: [PATCH] CMake: Add -Wall;-Wextra;-Werror to CFLAGS

---
 cmake/CompilerConfiguration.cmake | 8 +-------
 src/dbm/dbm_multiply.c            | 2 ++
 2 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/cmake/CompilerConfiguration.cmake b/cmake/CompilerConfiguration.cmake
index 2492e820a0..6507f46dc3 100644
--- a/cmake/CompilerConfiguration.cmake
+++ b/cmake/CompilerConfiguration.cmake
@@ -69,7 +69,7 @@ add_compile_options(
 add_compile_options(
   "$<$<AND:$<CONFIG:DEBUG>,$<COMPILE_LANG_AND_ID:Fortran,GNU>>:-O1;-march=native;-mtune=native>"
   "$<$<AND:$<CONFIG:DEBUG>,$<COMPILE_LANG_AND_ID:CXX,GNU>>:-O1;-march=native;-mtune=native>"
-  "$<$<AND:$<CONFIG:DEBUG>,$<COMPILE_LANG_AND_ID:C,GNU>>:-O1;-march=native;-mtune=native>"
+  "$<$<AND:$<CONFIG:DEBUG>,$<COMPILE_LANG_AND_ID:C,GNU>>:-O1;-march=native;-mtune=native;-Wall;-Wextra;-Werror>"
 )
 add_compile_options(
   "$<$<AND:$<CONFIG:DEBUG>,$<COMPILE_LANG_AND_ID:Fortran,GNU>>:-fsanitize=leak;-Werror=realloc-lhs>"
@@ -89,12 +89,6 @@ add_link_options(
   "$<$<AND:$<CONFIG:DEBUG>,$<COMPILE_LANG_AND_ID:CXX,GNU>>:-fsanitize=leak>"
   "$<$<AND:$<CONFIG:DEBUG>,$<COMPILE_LANG_AND_ID:C,GNU>>:-fsanitize=leak>")
 
-# TODO Prevent CMake from wrongly adding -fbacktrace and
-# -fallow-argument-mismatch to CFLAGS. add_compile_options(
-# "$<$<AND:$<CONFIG:DEBUG>,$<COMPILE_LANG_AND_ID:CXX,GNU>>:-Wall;-Wextra;-Werror>"
-# "$<$<AND:$<CONFIG:DEBUG>,$<COMPILE_LANG_AND_ID:C,GNU>>:-Wall;-Wextra;-Werror>"
-# )
-
 # Coverage
 add_compile_options(
   "$<$<CONFIG:COVERAGE>:-coverage;-fkeep-static-functions;-O1;-march=native;-mtune=native>"
diff --git a/src/dbm/dbm_multiply.c b/src/dbm/dbm_multiply.c
index baa2f2331c..30d37449df 100644
--- a/src/dbm/dbm_multiply.c
+++ b/src/dbm/dbm_multiply.c
@@ -377,6 +377,7 @@ void dbm_multiply(const bool transa, const bool transb, const double alpha,
   backend_stop(ctx);
 
   if (NULL != matrix_d) {
+    ctx = backend_start(matrix_d);
     iter =
         dbm_comm_iterator_start(transa, transb, matrix_a, matrix_b, matrix_d);
     while (dbm_comm_iterator_next(iter, &pack_a, &pack_b)) {
@@ -384,6 +385,7 @@ void dbm_multiply(const bool transa, const bool transb, const double alpha,
                      matrix_d, rows_max_eps, retain_sparsity, true, NULL, ctx);
     }
     dbm_comm_iterator_stop(iter);
+    backend_stop(ctx);
     const double epsilon = dbm_maxeps(matrix_d, matrix_c);
     if (maxeps < epsilon) {
       if (1 == verify) {