From 4d23de014a2d2f581901c7cb6633dfeca00969e2 Mon Sep 17 00:00:00 2001
From: dekken <philip.deegan@gmail.com>
Date: Fri, 20 Oct 2023 15:05:30 +0200
Subject: [PATCH] find MPI ourselves - mold doesn't use default lib search
 paths

---
 res/cmake/dep/samrai.cmake | 6 ++++++
 res/cmake/options.cmake    | 2 ++
 src/amr/CMakeLists.txt     | 2 +-
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/res/cmake/dep/samrai.cmake b/res/cmake/dep/samrai.cmake
index 555199745..cfdf2154c 100644
--- a/res/cmake/dep/samrai.cmake
+++ b/res/cmake/dep/samrai.cmake
@@ -32,3 +32,9 @@ else()
   message("SAMRAI HAS BEEN FOUND")
   message(${SAMRAI_INCLUDE_DIRS})
 endif()
+
+find_package(MPI REQUIRED)
+foreach(LIB ${MPI_LIBRARY})
+    get_filename_component(MPI_LIBRARY_PATH ${LIB} DIRECTORY)
+endforeach()
+message("MPI_C_LIBRARIES " ${MPI_LIBRARY_PATH})
diff --git a/res/cmake/options.cmake b/res/cmake/options.cmake
index 66efd8fc5..45dee4250 100644
--- a/res/cmake/options.cmake
+++ b/res/cmake/options.cmake
@@ -100,6 +100,8 @@ function(print_phare_options)
   message("build with ccache (if found) in devMode     : " ${withCcache})
   message("build with LLNL Caliper                     : " ${withCaliper})
 
+  message("MPI_LIBRARY_PATH                            : " ${MPI_LIBRARY_PATH})
+
   if(${devMode})
     message("PHARE_EXEC_LEVEL_MIN                        : " ${PHARE_EXEC_LEVEL_MIN})
     message("PHARE_EXEC_LEVEL_MAX                        : " ${PHARE_EXEC_LEVEL_MAX})
diff --git a/src/amr/CMakeLists.txt b/src/amr/CMakeLists.txt
index 57f4bc7ce..aa0522025 100644
--- a/src/amr/CMakeLists.txt
+++ b/src/amr/CMakeLists.txt
@@ -77,7 +77,7 @@ add_library(${PROJECT_NAME} ${SOURCES_INC} ${SOURCES_CPP})
 target_compile_options(${PROJECT_NAME} PRIVATE ${PHARE_WERROR_FLAGS})
 set_property(TARGET ${PROJECT_NAME} PROPERTY INTERPROCEDURAL_OPTIMIZATION ${PHARE_INTERPROCEDURAL_OPTIMIZATION})
 
-
+target_link_directories(${PROJECT_NAME} PUBLIC ${MPI_LIBRARY_PATH})
 target_link_libraries(${PROJECT_NAME} PUBLIC
   phare_core
   SAMRAI_algs