From 0bc342604ed4873bb9a24fd4205fec7d17eca953 Mon Sep 17 00:00:00 2001
From: Scot Breitenfeld <brtnfld@hdfgroup.org>
Date: Thu, 9 Nov 2023 08:56:02 -0600
Subject: [PATCH] always define DLLDEF

---
 fortran/src/CMakeLists.txt    | 2 ++
 hl/fortran/src/CMakeLists.txt | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/fortran/src/CMakeLists.txt b/fortran/src/CMakeLists.txt
index f8e25b5b392..b72e7f514c4 100644
--- a/fortran/src/CMakeLists.txt
+++ b/fortran/src/CMakeLists.txt
@@ -361,6 +361,8 @@ endif ()
 if (BUILD_SHARED_LIBS)
   if(MSVC)
       set(DLLDEF ${HDF5_F90_SRC_BINARY_DIR}/hdf5_fortrandll.def)
+  else()
+      set(DLLDEF "")
   endif()
   add_library (${HDF5_F90_LIBSH_TARGET} SHARED ${DLLDEF} ${f90_F_SOURCES_SHARED})
   target_include_directories (${HDF5_F90_LIBSH_TARGET}
diff --git a/hl/fortran/src/CMakeLists.txt b/hl/fortran/src/CMakeLists.txt
index 363003e0660..38c742fd714 100644
--- a/hl/fortran/src/CMakeLists.txt
+++ b/hl/fortran/src/CMakeLists.txt
@@ -200,6 +200,8 @@ endif ()
 if (BUILD_SHARED_LIBS)
   if(MSVC)
       set(DLLDEF ${HDF5_HL_F90_SRC_BINARY_DIR}/hdf5_hl_fortrandll.def)
+  else()
+      set(DLLDEF "")
   endif()
   add_library (${HDF5_HL_F90_LIBSH_TARGET} SHARED ${DLLDEF} ${HDF5_HL_F90_F_SOURCES_SHARED})
   target_include_directories (${HDF5_HL_F90_LIBSH_TARGET}