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From: "kargl at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/81615] save-temps and gfortran produces *.f90 files
 instead of *.i or *i90 files
Date: Fri, 09 Dec 2022 19:34:53 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D81615

kargl at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement
           Priority|P3                          |P5

--- Comment #13 from kargl at gcc dot gnu.org ---
(In reply to Ben Barrowes from comment #12)

> Can gfortran be modified to have the option to do this as well?

Sure, gfortran can be modified.  The nontrivial part is that there are very=
 few
active contributors to gfortran.  I suspect your patch would be much
appreciated.


Until then, you can modify your Makefile with very minor changes to stuff
intermediate files into subdirectories.

% ls
Makefile        a1.f90          b1.f90          c1.f90          d1.f90
% cat Makefile=20
FC =3D gfortran11
PP =3D preprocessed/
FF =3D -c -cpp -save-temps -dumpdir ${PP}
IN =3D f90
NAMES =3D a1 b1 c1 d1

all:
        mkdir -p ${PP}
.for i in ${NAMES}
        ${FC} ${FF} $i.${IN}
.endfor

clean:
        @rm -rf ${PP} *.o

% make
mkdir -p preprocessed/
gfortran11 -c -cpp -save-temps -dumpdir preprocessed/ a1.f90
gfortran11 -c -cpp -save-temps -dumpdir preprocessed/ b1.f90
gfortran11 -c -cpp -save-temps -dumpdir preprocessed/ c1.f90
gfortran11 -c -cpp -save-temps -dumpdir preprocessed/ d1.f90
% ls
Makefile        a1.o            b1.o            c1.o            d1.o
a1.f90          b1.f90          c1.f90          d1.f90          preprocesse=
d/
% ls preprocessed/
a1.f90  a1.s    b1.f90  b1.s    c1.f90  c1.s    d1.f90  d1.s=