From 96e362fdc9c6b138461919c96ef5e5a712dad8fb Mon Sep 17 00:00:00 2001
From: Paul Zehner <zehner.paul@jaxa.jp>
Date: Thu, 24 Jun 2021 12:09:52 +0900
Subject: Fujitsu: Add IPO support for Fortran

---
 Modules/Compiler/Fujitsu.cmake | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Modules/Compiler/Fujitsu.cmake b/Modules/Compiler/Fujitsu.cmake
index 13bc57c..78495cb 100644
--- a/Modules/Compiler/Fujitsu.cmake
+++ b/Modules/Compiler/Fujitsu.cmake
@@ -26,6 +26,16 @@ macro(__compiler_fujitsu lang)
   set(CMAKE_${lang}_LINKER_WRAPPER_FLAG "-Wl,")
   set(CMAKE_${lang}_LINKER_WRAPPER_FLAG_SEP ",")
 
+  # IPO flag
+  set(_CMAKE_${lang}_IPO_SUPPORTED_BY_CMAKE YES)
+  if ("${lang}" STREQUAL "Fortran")
+    # Supported by Fortran compiler only
+    set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER YES)
+    set(CMAKE_${lang}_COMPILE_OPTIONS_IPO "-Klto")
+  else()
+    set(_CMAKE_${lang}_IPO_MAY_BE_SUPPORTED_BY_COMPILER NO)
+  endif()
+
   # How to actually call the compiler
   set(CMAKE_${lang}_CREATE_PREPROCESSED_SOURCE
   "<CMAKE_${lang}_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -E $<$<COMPILE_LANGUAGE:Fortran>:-Cpp> <SOURCE> > <PREPROCESSED_SOURCE>")
-- 
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