From 93f230e408cba124dc5ba97b1ef7f228ccb4fcc9 Mon Sep 17 00:00:00 2001
From: Brad King <brad.king@kitware.com>
Date: Mon, 31 Jan 2011 16:24:12 -0500
Subject: Pass -o after -c for Fortran to avoid mpif77 ordering bug

When running

  $ mpif77 -c example.f -o example.f.o

mpif77 recognizes -o and produces example.f.o, but when running

  $ mpif77 -o example.f.o -c example.f

the -o option is ignored and the object file is example.o.  Performing
the same experiment on the underlying compiler tool or with the mpicc
and mpiCC wrappers does not exhibit this behavior, so the issue appears
to be specific to mpif77.

Reported-by: Zhen Wang <zwang26@emory.edu>
---
 Modules/CMakeFortranInformation.cmake | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Modules/CMakeFortranInformation.cmake b/Modules/CMakeFortranInformation.cmake
index f6a52c6..80f5e46 100644
--- a/Modules/CMakeFortranInformation.cmake
+++ b/Modules/CMakeFortranInformation.cmake
@@ -168,9 +168,10 @@ SET(CMAKE_Fortran_ARCHIVE_APPEND "<CMAKE_AR> r  <TARGET> <LINK_FLAGS> <OBJECTS>"
 SET(CMAKE_Fortran_ARCHIVE_FINISH "<CMAKE_RANLIB> <TARGET>")
 
 # compile a Fortran file into an object file
+# (put -o after -c to workaround bug in at least one mpif77 wrapper)
 IF(NOT CMAKE_Fortran_COMPILE_OBJECT)
   SET(CMAKE_Fortran_COMPILE_OBJECT
-    "<CMAKE_Fortran_COMPILER> -o <OBJECT> <DEFINES> <FLAGS> -c <SOURCE>")
+    "<CMAKE_Fortran_COMPILER> <DEFINES> <FLAGS> -c <SOURCE> -o <OBJECT>")
 ENDIF(NOT CMAKE_Fortran_COMPILE_OBJECT)
 
 # link a fortran program
-- 
cgit v0.12