add FITPACK Fortran library

start developing of FITPACK C++ bindings
mount_server.cpp: fix compilation error with GCC15

cxx/fitpack/CMakeLists.txt

@@ -0,0 +1,29 @@
+cmake_minimum_required(VERSION 3.20)
+
+set(func_name "")
+
+file(GLOB src_files "*.f")
+
+foreach(ff IN LISTS src_files)
+  get_filename_component(sn ${ff} NAME_WE)
+  list(APPEND func_name ${sn})
+endforeach()
+
+# message(STATUS "${func_name}")
+
+string(REPLACE ";" " " func_str "${func_name}")
+
+# message(STATUS ${func_str})
+
+enable_language(Fortran CXX)
+
+include(FortranCInterface)
+FortranCInterface_HEADER(FortranCInterface.h
+  MACRO_NAMESPACE "FC_"
+  SYMBOL_NAMESPACE "fp_"
+  SYMBOLS ${func_str}
+)
+
+add_library(fitpack STATIC ${src_files} fitpack.h)
+
+