Add support for Fujitsu compiler

This PR adds support for the Fujitsu compiler based on settings provided by @wkensuke in Goddard-Fortran-Ecosystem/gFTL-shared#71
Goddard-Fortran-Ecosystem · Feb 26, 2024 · ce1d4f4 · ce1d4f4
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diff --git a/ChangeLog.md b/ChangeLog.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Fujitsu compiler support
+
 ## [1.12.0] - 2024-01-25
 
 ### Changed

diff --git a/cmake/Fujitsu.cmake b/cmake/Fujitsu.cmake
@@ -0,0 +1,14 @@
+if (CMAKE_Fortran_COMPILER_ID MATCHES Fujitsu)
+    if (CMAKE_Fortran_COMPILER_VERSION VERSION_LESS 4.10.0)
+      message(FATAL_ERROR "${CMAKE_Fortran_COMPILER_ID} version must be at least 4.10.0!")
+    endif ()
+endif ()
+
+# Compiler specific flags for Fujitsu Fortran compiler
+
+set(check_all "-Nquickdbg")
+set(cpp "-Cfpp")
+
+set(CMAKE_Fortran_FLAGS_DEBUG "-O0 ${check_all}")
+set(CMAKE_Fortran_FLAGS_RELEASE "-O3")
+set(CMAKE_Fortran_FLAGS "-g ${cpp} -Nalloc_assign -Free")