# Fortranpack: A Modern Fortran Numerical & Scientific Programming Package **URL:** \ **Category:** Announcements\ **Created:** [April 26, 2025, 9:58pm UTC](https://fortran-lang.discourse.group/t/fortranpack-a-modern-fortran-numerical-scientific-programming-package/9633 "2025-04-26T21:58:31Z")\ **Posts on this page:** 13\ **Page:** 1
**Author:** ![jacobwilliams](https://yyz2.discourse-cdn.com/free1/user_avatar/fortran-lang.discourse.group/jacobwilliams/32/10_2.png) [@jacobwilliams](https://fortran-lang.discourse.group/u/jacobwilliams)\ **Post date:** [April 26, 2025, 9:58pm UTC](https://fortran-lang.discourse.group/t/fortranpack-a-modern-fortran-numerical-scientific-programming-package/9633/1 "2025-04-26T21:58:32Z")
Behold Fortranpack: A Modern Fortran Numerical & Scientific Programming Package > **[GitHub - jacobwilliams/fortranpack: A Modern Fortran Numerical & Scientific...](https://github.com/jacobwilliams/fortranpack)** > > A Modern Fortran Numerical & Scientific Programming Package What is this you ask? It’s just an FPM manifest that imports all my other libraries! So, add it as a dependency and you get everything. Genius or cursed? It’s just an experiment really. I was wondering if there would be some utility in a meta-library like this. Rather than having everything in a single repository (like `stdlib`), things are split up and development separately. Something to think about. There are pros and cons to both approaches. ---
**Author:** ![urbanjost](https://avatars.discourse-cdn.com/v4/letter/u/0ea827/32.png) [@urbanjost](https://fortran-lang.discourse.group/u/urbanjost)\ **Post date:** [April 26, 2025, 10:18pm UTC](https://fortran-lang.discourse.group/t/fortranpack-a-modern-fortran-numerical-scientific-programming-package/9633/2 "2025-04-26T22:18:39Z")
Super-packages are interesting and educational as github, fpm, and compilers all get exercised differently than when working piecemeal with smaller projects. I have been using a slightly different approach, partly for testing fpm, since the inception of the Fortran branch of fpm. [GitHub - urbanjost/general-purpose-fortran: General Purpose Fortran Cooperative](https://github.com/urbanjost/general-purpose-fortran) is a single library that was split into many subprojects specifically to be used more selectively, particularly via fpm. As you mentioned, there are pros and cons to each approach, but I was expecting an fpm repository to have developed more than has occurred, which tends to favor smaller packages. Theoretically the repository seemed like it would be a natural hotbed for developing stdlib modules as well. Combining many modules gives fpm a good workout as well. Do you see any unexpected recompilations when you change a program in app/ or test/ or example/ ? ---
**Author:** ![ivanpribec](https://yyz2.discourse-cdn.com/free1/user_avatar/fortran-lang.discourse.group/ivanpribec/32/3290_2.png) [@ivanpribec](https://fortran-lang.discourse.group/u/ivanpribec)\ **Post date:** [April 27, 2025, 7:39pm UTC](https://fortran-lang.discourse.group/t/fortranpack-a-modern-fortran-numerical-scientific-programming-package/9633/3 "2025-04-27T19:39:16Z")
Here is the dependency graph as a [SVG](https://mermaid.ink/svg/pako:eNqVWNuS0zgQ_RWVX_ZlMsRy7g9bFSYDDMwlJDvL1potSrGVRGBbRpIHAsW_b0uyEzkTGPEUXdp9Wuru0618DxKe0mASrDP-JdkSodD14n2B0G0Yr7lQghQlST79Z5ZwTMTmoVOv27UoXskyYwVtL_fihIhM8qJDs4yViiUdVii6ESSTVqIfJ7zIyVc7G5gZq78exok8whnFKdlkbGVn4zhNKVnldhZ245SXo35UT8F0DSbKeo6bo3RykmzrxWi_KCkRybZDirQjYane78UftfktI8J-nK3WG1lbEQ7inApJCzi9-sIkQB7JD-Mio5JnD492RvFtlc_Yel3PxzEvFVxPfdPduEy2rD4ADuOSfSKs2cRxybOd4FzJtlYcwU5Jj6zGvbiUnxtd_bjclRlXRzKD-HNFUsfXQ7MgiKrEkW_xKBbgSeZKj2Pxae-dqBufMC4KY8nyKiOKpnDZBSUQNpt6D8cy29sYRTHEVElq5VEvlkqA7ME7UT-uKpYeAQzi9T6EomF8vXy7qCejOKvADfVsDFs3divJWPIJ7EdbQdfofbBVqpSTZ882TG2r1XnC82cfScJXXxiEMcnlMzcD3gfwxRStqALPow1VH0A-hzj6AFJVTguFQBK9aKQdwMgb8Ci9DOZNlSmWMkCQjBckQ887SyOFrkzcc7hk2EB8jWZEEQRDghZ0A5cv0EvwXMuWnrctP89pY9aF3UZyl-cUPJbo4-dSm9F8gZwvHBP6_iYY0jBwC7omieKCpuji7vZm-g-6ZitBxK6levBbqll9wUCKomg8h2jKmvtshByEoT-CbMfOgpIUQbygd4Ipii6Wf6MXDAgD3UsId9S2ooU58sa0tGngZkzQBLIPTZOd1gOhQMqtRO_g21-Bjf3BDCufusKrvMyoTol9ZKotRbPZ5fT5DZqm8HHnOZFbfTtbNM02HG5km7fMCLv-dphycMqOy4MrXxG4D_GHRLO7OUiju9klWhqubsOG3rB12TmF-yhlryFdIRtbCdvG9Sclt7ydBId1zQ4XvJCKFEpqb1cZbeNFv413VDkN9NKs6fDVga2X9fiLDrH85yEW-pOQW5ZrBj467uvl3S2azq_aCP4cY2u80W2HCGozy9k3G7vZCZYJ_WnmZy2DdVy9if6ym6iUtEo5bKc8R0WVr0ylKSgUZn4Up_489KgpMdi3vMhsUF5C6TdHtelgvfcLggj96ajuek5FKWxRKBqQG1qCCiALZs04xeuhPyvZzspANkO39vvTyvzi1dXc6JkzmlBwEeRUtQImfUVFrim8XX_n0CCRTTvNsD-d2KbvCRbTNDo3guglxIWusafpE_vzyaP20p4ZVgueM3DQQm8-GRY4-g1Ep221PMJ0xdifODeEZfopI9sG8mcP3Qk_UeLny7fztnp_6mj31jU9SXsU5wh1Bmtm1PISrQWkd2NLZar_fKe2vIDylBOlhYB2zq3687Z1_tTTtPinLuDt_XQ2n168aese_pbu9mvBnj4lwJ0PFL0klZRMA-0Fnw4gf145vEieyJfF5cvF1YmT-tOJeekYlBfsK7UN3AMRjKwy2gHSLtGiKja086ZS0HtbopXQ-P7qpJE_CT1OzGlTkkxsQROS6vjRxGBk67YVoq3ilUQSGBY4fl0Vib4Tsw1mwicQnAJeZfvDtC30560Tz7wmpe06mjbrT4ZA5M9a5gXpwZZLeBjO0Z0t6UfNXuRPWfaJ6uCBshQt59fz6ZuWQ_Lj1i-jRKqOhIwR0OsnpoDYVx44TylzXa5N_ux2eCcbu15XUkEA5nTfhwlewS-gasNq6TaYP9e5L3CbDo-52iG6-_ur2RGWP3Otm5fZDFqEB2IYZS0oReFsH8kIZKxLdbL9otmM_FlN_4dwKqRkSaBRQ3W_JHeQ9vDQlY9fD5E_hZm_KAzY9f3y7tqquQ07nT9v8WEYHYa9w7B_GA4Ow-FhODoMx4dh2HXGoTN2AEMHMXQgQwczdEBDBzV0YEMHFzu42MHFDi52cLGDix1c7OBiBxc7uNjBjRzcyMGN3At2cCMHN7K4Y1fP0EwG7mToTkbuZFz_medcGN5rC84C6H5zwtJgEnzXm-8DIKscSHgCw5SuCdCIjokfIFqVKfCo5jUugokSFT0LSKX4clckwWRNMkkboRkj0PHmjVRJin85d6fB5HvwNZh08PkQjzAOB_0Id4e9_hifBbtg0ut2zwdhvz8eDXuDAcbRj7Pgm9EQnnfDcW84GofDEIej0RA-oMakG_ufsvlr-SwAztls91bpMt2gQ4sPWXXBq0IFk0E0-PE__-q0Tw) file. Generated using [fpm-deps.](https://github.com/ivan-pi/fpm-deps) ---
**Author:** ![urbanjost](https://avatars.discourse-cdn.com/v4/letter/u/0ea827/32.png) [@urbanjost](https://fortran-lang.discourse.group/u/urbanjost)\ **Post date:** [April 28, 2025, 1:04am UTC](https://fortran-lang.discourse.group/t/fortranpack-a-modern-fortran-numerical-scientific-programming-package/9633/4 "2025-04-28T01:04:31Z")
Fortranpack already has an index to all the dependencies but I did not realize till now that the output from the `"--mermaid md"` option can be used as-is in github markdown. I think I will spend a bit of time adding the dependency graphs to my README.md files. Fortranpack is not only a good way to exercise `fpm` but a decent test of a Fortran compiler as well 🫠 ---
**Author:** ![jacobwilliams](https://yyz2.discourse-cdn.com/free1/user_avatar/fortran-lang.discourse.group/jacobwilliams/32/10_2.png) [@jacobwilliams](https://fortran-lang.discourse.group/u/jacobwilliams)\ **Post date:** [April 28, 2025, 1:05am UTC](https://fortran-lang.discourse.group/t/fortranpack-a-modern-fortran-numerical-scientific-programming-package/9633/5 "2025-04-28T01:05:55Z")
Yes! @certik if you can get LFortran to compile this you are close to done! πŸ˜€ ---
**Author:** ![rwmsu](https://avatars.discourse-cdn.com/v4/letter/r/48db29/32.png) [@rwmsu](https://fortran-lang.discourse.group/u/rwmsu)\ **Post date:** [April 28, 2025, 1:09am UTC](https://fortran-lang.discourse.group/t/fortranpack-a-modern-fortran-numerical-scientific-programming-package/9633/6 "2025-04-28T01:09:09Z")
I would like to nominate Jacob to be Fortran’s official β€œLeader of the Packs”. Do I hear a second πŸ˜„ ---
**Author:** ![ivanpribec](https://yyz2.discourse-cdn.com/free1/user_avatar/fortran-lang.discourse.group/ivanpribec/32/3290_2.png) [@ivanpribec](https://fortran-lang.discourse.group/u/ivanpribec)\ **Post date:** [April 28, 2025, 2:11am UTC](https://fortran-lang.discourse.group/t/fortranpack-a-modern-fortran-numerical-scientific-programming-package/9633/7 "2025-04-28T02:11:26Z")
> [@urbanjost](#): > > Fortranpack already has an index to all the dependencies but I did not realize till now that the output from the `"--mermaid md"` option can be used as-is in github markdown. Yes, it is part of both Github- and Gitlab-flavored markdown. I’m assuming the boxes are only clickable when included in the HTML, but I may be wrong. There is also a hover effect which displays the name. In principle one can also edit line styles, shapes, or add icons and images ([Flowcharts Syntax | Mermaid](https://mermaid.js.org/syntax/flowchart.html)). > [@urbanjost](#): > > I think I will spend a bit of time adding the dependency graphs to my README.md files. Do let me know if you encounter any problems. ---
**Author:** ![certik](https://yyz2.discourse-cdn.com/free1/user_avatar/fortran-lang.discourse.group/certik/32/4_2.png) [@certik](https://fortran-lang.discourse.group/u/certik)\ **Post date:** [April 28, 2025, 4:30am UTC](https://fortran-lang.discourse.group/t/fortranpack-a-modern-fortran-numerical-scientific-programming-package/9633/8 "2025-04-28T04:30:42Z")
> [@jacobwilliams](#): > > if you can get LFortran to compile this you are close to done! πŸ˜€ Thanks, we’ll get there! ---
**Author:** ![urbanjost](https://avatars.discourse-cdn.com/v4/letter/u/0ea827/32.png) [@urbanjost](https://fortran-lang.discourse.group/u/urbanjost)\ **Post date:** [April 28, 2025, 7:06am UTC](https://fortran-lang.discourse.group/t/fortranpack-a-modern-fortran-numerical-scientific-programming-package/9633/9 "2025-04-28T07:06:15Z")
It is clickable, the hover works, and a navigator allows zooming and panning. At the bottom of the README.md I corrected it but the original output using ```bash fpm deps --mermaid md --output deps.md ``` [deps.md](https://github.com/urbanjost/prep/blob/main/deps.md) the top link goes to the top of repositories instead of to the prep project, although it works as expected on other projects. It might be nice if fpm-devs wrote other github markdown formats as well, like the index in Fortranpack. The graphs are great, but the table like Fortranpack has and a simple text listing for terminal output when using fpm as well would be useful. @jacobwilliams – is your index manually generated or automated? ---
**Author:** ![jacobwilliams](https://yyz2.discourse-cdn.com/free1/user_avatar/fortran-lang.discourse.group/jacobwilliams/32/10_2.png) [@jacobwilliams](https://fortran-lang.discourse.group/u/jacobwilliams)\ **Post date:** [April 28, 2025, 2:53pm UTC](https://fortran-lang.discourse.group/t/fortranpack-a-modern-fortran-numerical-scientific-programming-package/9633/10 "2025-04-28T14:53:03Z")
I just manually made it. Wouldn’t be hard to automate it. ---
**Author:** ![ivanpribec](https://yyz2.discourse-cdn.com/free1/user_avatar/fortran-lang.discourse.group/ivanpribec/32/3290_2.png) [@ivanpribec](https://fortran-lang.discourse.group/u/ivanpribec)\ **Post date:** [April 28, 2025, 3:08pm UTC](https://fortran-lang.discourse.group/t/fortranpack-a-modern-fortran-numerical-scientific-programming-package/9633/11 "2025-04-28T15:08:53Z")
> [@urbanjost](#): > > the top link goes to the top of repositories instead of to the prep project, although it works as expected on other projects. That is because of the `homepage` field in the prep `fpm.toml`: [prep/fpm.toml at c0120b14d23097c704a0ecf1db6c87e08388ea18 Β· urbanjost/prep Β· GitHub](https://github.com/urbanjost/prep/blob/c0120b14d23097c704a0ecf1db6c87e08388ea18/fpm.toml#L11) > [@urbanjost](#): > > but the table like Fortranpack has and a simple text listing for terminal output when using fpm as well would be useful. I haven’t really advertised it yet, but I also made text command `fpm-tree` (it is part of fpm-deps). For instance for fortranpack, it currently display the following: ```txt ~/fortran/fpm_packages/fortranpack$ fpm-tree fortranpack β”œβ”€β”€ argv-fortran β”œβ”€β”€ bspline-fortran β”œβ”€β”€ carlson-elliptic-integrals β”œβ”€β”€ conmax β”œβ”€β”€ conmin β”œβ”€β”€ csv-fortran β”œβ”€β”€ daglib β”œβ”€β”€ ddeabm β”‚ └── roots-fortran β”œβ”€β”€ dop853 β”œβ”€β”€ finterp β”œβ”€β”€ fortran-mach β”œβ”€β”€ fortran-search-and-sort β”œβ”€β”€ json-fortran β”œβ”€β”€ lbfgsb β”œβ”€β”€ mersenne-twister-fortran β”œβ”€β”€ nlesolver-fortran β”‚ β”œβ”€β”€ fmin β”‚ β”œβ”€β”€ LSQR β”‚ β”œβ”€β”€ lusol β”‚ └── LSMR β”œβ”€β”€ NumDiff β”œβ”€β”€ optgra β”œβ”€β”€ pchip β”œβ”€β”€ pikaia β”‚ └── mersenne-twister-fortran (*) β”œβ”€β”€ polyroots-fortran β”œβ”€β”€ popen-fortran β”œβ”€β”€ psqp β”œβ”€β”€ pyplot-fortran β”œβ”€β”€ quadpack β”œβ”€β”€ quadrature-fortran β”œβ”€β”€ regridpack β”œβ”€β”€ rklib β”‚ └── roots-fortran (*) β”œβ”€β”€ roots-fortran (*) β”œβ”€β”€ simulated-annealing β”œβ”€β”€ slsqp β”œβ”€β”€ splpak β”œβ”€β”€ stringsort └── uuid-fortran ``` It has a nice clean tree structure with few package inter-dependencies. ---
**Author:** ![Beliavsky](https://avatars.discourse-cdn.com/v4/letter/b/ba8739/32.png) [@Beliavsky](https://fortran-lang.discourse.group/u/Beliavsky)\ **Post date:** [April 28, 2025, 5:52pm UTC](https://fortran-lang.discourse.group/t/fortranpack-a-modern-fortran-numerical-scientific-programming-package/9633/12 "2025-04-28T17:52:42Z")
Nice, thanks. Apart from FPM and fpm-tree, is there a tool that creates such a diagram for a program, showing the modules USEd by the main program and by each module? ---
**Author:** ![ivanpribec](https://yyz2.discourse-cdn.com/free1/user_avatar/fortran-lang.discourse.group/ivanpribec/32/3290_2.png) [@ivanpribec](https://fortran-lang.discourse.group/u/ivanpribec)\ **Post date:** [April 28, 2025, 6:19pm UTC](https://fortran-lang.discourse.group/t/fortranpack-a-modern-fortran-numerical-scientific-programming-package/9633/13 "2025-04-28T18:19:39Z")
I’ve done that too in a private fork of fpm. The information (with some caveats) is available from the fpm build model: [Option to output dependency tree Β· Issue #687 Β· fortran-lang/fpm Β· GitHub](https://github.com/fortran-lang/fpm/issues/687#issuecomment-2727698387)