From 8619865dde1c474e00be4b19d029310bfc68df7e Mon Sep 17 00:00:00 2001
From: Andreas Suter <andreas.suter@psi.ch>
Date: Sun, 1 Mar 2026 11:21:01 +0100
Subject: [PATCH] fix linker errors: add HDF5 C++ lib and FFTW3 include paths

- Add ${HDF5_LIBRARIES} to PMusr link dependencies so HDF5 C++ symbols
  (H5::DataType, H5::PredType, etc.) used in PRunDataHandler.cpp resolve.
- Add ${FFTW3_INCLUDE} to musrRootValidation and write_musrRoot_runHeader
  include paths; both pull in PMusr.h which transitively includes fftw3.h.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---
 src/CMakeLists.txt         | 6 ++++--
 src/classes/CMakeLists.txt | 1 +
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index f47fc441c..69ba03e24 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -107,11 +107,12 @@ target_link_libraries(musrFT  FFTW3::FFTW3 ${ROOT_LIBRARIES} ${MUSRFIT_LIBS})
 
 add_executable(musrRootValidation musrRootValidation.cpp)
 target_compile_options(musrRootValidation BEFORE PRIVATE "-DHAVE_CONFIG_H" "${HAVE_GIT_REV_H}")
-target_include_directories(musrRootValidation 
+target_include_directories(musrRootValidation
   BEFORE PRIVATE
     $<BUILD_INTERFACE:${CMAKE_BINARY_DIR}>
     $<BUILD_INTERFACE:${CMAKE_BINARY_DIR}/src>
     $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/src/include>
+    $<BUILD_INTERFACE:${FFTW3_INCLUDE}>
     $<BUILD_INTERFACE:${LIBXML2_INCLUDE_DIR}>
 )
 target_link_libraries(musrRootValidation ${ROOT_LIBRARIES} ${MUSRFIT_LIBS} ${LIBXML2_LIBRARIES})
@@ -141,11 +142,12 @@ target_link_libraries(musrview FFTW3::FFTW3 ${ROOT_LIBRARIES} ${MUSRFIT_LIBS})
 
 add_executable(write_musrRoot_runHeader write_musrRoot_runHeader.cpp)
 target_compile_options(write_musrRoot_runHeader BEFORE PRIVATE "-DHAVE_CONFIG_H" "${HAVE_GIT_REV_H}")
-target_include_directories(write_musrRoot_runHeader 
+target_include_directories(write_musrRoot_runHeader
   BEFORE PRIVATE
     $<BUILD_INTERFACE:${CMAKE_BINARY_DIR}>
     $<BUILD_INTERFACE:${CMAKE_BINARY_DIR}/src>
     $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/src/include>
+    $<BUILD_INTERFACE:${FFTW3_INCLUDE}>
     $<BUILD_INTERFACE:${LIBXML2_INCLUDE_DIR}>
     $<BUILD_INTERFACE:${CMAKE_SOURCE_DIR}/src/external/MusrRoot>
 )
diff --git a/src/classes/CMakeLists.txt b/src/classes/CMakeLists.txt
index 3b1c99c80..decafc101 100644
--- a/src/classes/CMakeLists.txt
+++ b/src/classes/CMakeLists.txt
@@ -206,6 +206,7 @@ set(DependOnLibs ${DependOnLibs} Class_MuSR_PSI)
 if (nexus)
   set(DependOnLibs ${DependOnLibs} ${LIBNEXUS_LIBRARY})
   set(DependOnLibs ${DependOnLibs} PNeXus)
+  set(DependOnLibs ${DependOnLibs} ${HDF5_LIBRARIES})
 endif (nexus)
 if (OpenMP_FOUND)
   set(DependOnLibs ${DependOnLibs} OpenMP::OpenMP_CXX)