enable fpm deployment

ci/fpm-deployment.sh

@@ -11,6 +11,7 @@ fypp="${FYPP:-$(which fypp)}"
 # Arguments for the fypp preprocessor
 maxrank=4
 fyflags="${FYFLAGS:--DMAXRANK=$maxrank}"
+fyflags="${fyflags} -DFPM_DEPLOYMENT=True"
 
 # Number of parallel jobs for preprocessing
 if [ $(uname) = "Darwin" ]; then

ci/fpm.toml

@@ -8,3 +8,6 @@ copyright = "2019-2021 stdlib contributors"
 [dev-dependencies]
 test-drive.git = "https://github.com/fortran-lang/test-drive"
 test-drive.tag = "v0.4.0"
+
+[preprocess]
+[preprocess.cpp]