Compile AquaCrop (Fortran90) on MacOS

[gdelannoy]

Here is an example of how to compile AquaCrop (or other Fortran code) on your Mac:

1. install a Fortran compiler,
2. get around some dynamic library issues (if you want them static) (see sudo commands),
3. compile.

Install Fortran compiler

a. $ xcode-select --install
b. $ /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

On my Mac (institute managed, u123456 is my assumed institute login), this gave a permission problem, which I solved by:
$ cd /usr/local/share/zsh/
$ /usr/bin/sudo /usr/sbin/chown -R u123456:admin site-functions

c. $ brew install gcc
(Or, if you have an old version: $ brew upgrade)

This gave me a permission problem, which I solved by:
$ /usr/bin/sudo /usr/sbin/chown -R u123456:admin /usr/local/share/zsh
$ chmod u+w /usr/local/share/zsh

d. gfortran --version
(Check if you get a good answer to confirm that your installation was correct.)

Get around dynamic libraries (if you want to use your executable on another Mac)

This example is with version 13, update to your gfortran version number:
$ sudo mv /usr/local/opt/gcc/lib/gcc/13/libquadmath.0.dylib /usr/local/opt/gcc/lib/gcc/13/libquadmath.0.dylib_BKP
$ sudo mv /usr/local/opt/gcc/lib/gcc/current/libquadmath.0.dylib /usr/local/opt/gcc/lib/gcc/current/libquadmath.0.dylib_BKP

Compile

a. Assuming that the source code was properly cloned and stored in AquaCrop/src/,
$ cd AquaCrop/src/
$ make clean
$ make STATIC=1 LDFLAGS_EXE="-static-libgcc /usr/local/opt/gcc/lib/gcc/13/libquadmath.a" bin
(The AquaCrop executable should now show up in your src directory.)

b. Verify the libraries of the new aquacrop executable
$ otool -L aquacrop
(This should not show any dynamic libraries, other than the system library.)

Undo fix to get around dynamic libraries

This example is with version 13, update to your gfortran version number:
$ sudo mv /usr/local/opt/gcc/lib/gcc/13/libquadmath.0.dylib_BKP /usr/local/opt/gcc/lib/gcc/13/libquadmath.0.dylib
$ sudo mv /usr/local/opt/gcc/lib/gcc/current/libquadmath.0.dylib_BKP /usr/local/opt/gcc/lib/gcc/current/libquadmath.0.dylib