Setting Fortran command-line flags in CMake

[vansnyder]

The default setup for CMake for gtk-fortran is to use gfortran with options -pthread -O3 -mtune=native -march=native.

I want to use other compilers -- nagfor and ifort -- which don't have the same options.

How do I set the compiler options on the CMake command line (or in some file somewhere to make them the defaults)? The installation instructions just say "set some cmake variables" but don't explain which variables, or how to set them.

I tried -DCMAKE_Fortran_FLAGS_RELEASE:STRING="-g -gline -colour -C=all"

The CMake output says -- Compilation flags: -g -gline -colour -C=all -g -gline -colour -C=all
(why do the options appear twice?)

When I then run make:
Option error: -gline option specified twice

[vmagnin]

Thanks @vansnyder for reporting. I will need some time to answer all your questions.

On my side, CMAKE_Fortran_FLAGS_RELEASE is working, as you can see in the example below (Ubuntu 21.10).
Are you using the latest gtk4 commits? There has been some changes in the CMake files on the 23th and 25th February, as we were working on a Conda gtk-4-fortran package (see issue #249). I don't know if it could be related to your problem.

$ cmake -D CMAKE_Fortran_FLAGS_RELEASE="-O2 -std=f2008" ..
-- The Fortran compiler identification is GNU 11.2.0
-- Detecting Fortran compiler ABI info
-- Detecting Fortran compiler ABI info - done
-- Check for working Fortran compiler: /usr/bin/f95 - skipped
-- Checking whether /usr/bin/f95 supports Fortran 90
-- Checking whether /usr/bin/f95 supports Fortran 90 - yes
-- Building gtk-4-fortran 4.1.0
-- GNUInstallDirs: /usr/local lib include bin share share/man
-- System: Linux 5.13.0-30-generic x86_64
-- Compiler: GNU 11.2.0 /usr/bin/f95
-- Build type is: release
-- Compilation flags:  -O2 -std=f2008
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.29.2") 
-- Checking for module 'gtk4'
--   Found gtk4, version 4.4.0
-- Checking for module 'plplot-fortran'
--   Found plplot-fortran, version 5.15.0
-- Checking for module 'plplot'
--   Found plplot, version 5.15.0
-- Configuring done
-- Generating done
-- Build files have been written to: /tmp/gtk-fortran/build

[vansnyder]

On Wed, 2022-03-09 at 02:06 -0800, Vincent Magnin wrote: Thanks @vansnyder for reporting. I will need some time to answer all your questions. On my side, CMAKE_Fortran_FLAGS_RELEASE is working, as you can see in the example below (Ubuntu 21.10). Are you using the latest gtk4 commits?

I haven't been able to install the gtk4 libraries from the Debian 10 distribution. There is a package called gtk+4, but even after installing it, cmake says it can't find it, and refuses to proceed. So I'm using gtk3, which works, up to the point of duplicating command- line options for the NAG compiler. The INSTALL.md file needs more instructions about how to select the compiler and its command-line options.

…

There has been some changes in the CMake files on the 23th and 25th February, as we were working on a Conda gtk-4-fortran package (see issue #249). I don't know if it could be related to your problem. $ cmake -D CMAKE_Fortran_FLAGS_RELEASE="-O2 -std=f2008" .. -- The Fortran compiler identification is GNU 11.2.0 -- Detecting Fortran compiler ABI info -- Detecting Fortran compiler ABI info - done -- Check for working Fortran compiler: /usr/bin/f95 - skipped -- Checking whether /usr/bin/f95 supports Fortran 90 -- Checking whether /usr/bin/f95 supports Fortran 90 - yes -- Building gtk-4-fortran 4.1.0 -- GNUInstallDirs: /usr/local lib include bin share share/man -- System: Linux 5.13.0-30-generic x86_64 -- Compiler: GNU 11.2.0 /usr/bin/f95 -- Build type is: release -- Compilation flags: -O2 -std=f2008 -- Found PkgConfig: /usr/bin/pkg-config (found version "0.29.2") -- Checking for module 'gtk4' -- Found gtk4, version 4.4.0 -- Checking for module 'plplot-fortran' -- Found plplot-fortran, version 5.15.0 -- Checking for module 'plplot' -- Found plplot, version 5.15.0 -- Configuring done -- Generating done -- Build files have been written to: /tmp/gtk-fortran/build — Reply to this email directly, view it on GitHub, or unsubscribe. Triage notifications on the go with GitHub Mobile for iOS or Android. You are receiving this because you were mentioned.Message ID: <vmagnin/gtk-fortran/repo- ***@***.***>

[vmagnin]

So I'm using gtk3, which works, up to the point of duplicating command-
line options for the NAG compiler.

@vansnyder , I have not succeeded in replicating that duplicating command-line options problem. This is what I obtain in a Debian 10 virtual machine with the latest gtk3 branch:

$ git clone [email protected]:vmagnin/gtk-fortran.git
$ cd gtk-fortran
$ mkdir build && cd build
$ git checkout gtk3
$ cmake -D EXCLUDE_PLPLOT=true -D CMAKE_Fortran_FLAGS_RELEASE="-O1 -std=f2008" -D CMAKE_Fortran_COMPILER:FILEPATH=$(which gfortran-7) ..
-- The Fortran compiler identification is GNU 7.4.0
-- Check for working Fortran compiler: /usr/bin/gfortran-7
-- Check for working Fortran compiler: /usr/bin/gfortran-7  -- works
-- Detecting Fortran compiler ABI info
-- Detecting Fortran compiler ABI info - done
-- Checking whether /usr/bin/gfortran-7 supports Fortran 90
-- Checking whether /usr/bin/gfortran-7 supports Fortran 90 -- yes
-- Building gtk-3-fortran 3.24.30
-- GNUInstallDirs: /usr/local lib include bin share share/man
-- System: Linux 4.19.0-19-amd64 x86_64
-- Compiler: GNU 7.4.0 /usr/bin/gfortran-7
-- Build type is: release
-- Compilation flags:  -O1 -std=f2008
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.29") 
-- Checking for module 'gtk+-3.0'
--   Found gtk+-3.0, version 3.24.5
-- >>> PLPLOT excluded as command option
-- Configuring done
-- Generating done
-- Build files have been written to: /home/osboxes/gtk-fortran/build