1. When editing the source code, always work on the .F files, otherwise changes will be lost on the next compilation.
1. When editing the source code, always work on the .F files, otherwise changes will be lost on the next compilation.
2. In the .F files, it is possible to include `#ifdef` and `#ifndef` directives for conditional compilation.
2. In the .F files, it is possible to include `#ifdef` and `#ifndef` directives for conditional compilation.
For instance, in `dyn_em/module_initialize_ideal.F`, the following bits of code define the model orography for idealized large-eddy simulation runs. Four possibilities are given: `MTN`, `EW_RIDGE`, `NS_RIDGE`, and `NS_VALLEY`. If none is selected at compile time, none of these code lines is compiled and `grid%ht(i,j)` (the model orography) is set to 0:
For instance, in `dyn_em/module_initialize_ideal.F`, the following bits of code define the model orography for idealized large-eddy simulation runs. Four possibilities are given: `MTN`, `EW_RIDGE`, `NS_RIDGE`, and `NS_VALLEY`. If none is selected at compile time (select by adding `!` in front of #ifdef and #endif), none of these code lines is compiled and `grid%ht(i,j)` (the model orography) is set to 0:
