# Ading stdlib as a dependency in fpm caused demo build to fail

**URL:** <https://fortran-lang.discourse.group/t/ading-stdlib-as-a-dependency-in-fpm-caused-demo-build-to-fail/11055>\
**Category:** fpm\
**Created:** [August 17, 2026, 2:48pm UTC](https://fortran-lang.discourse.group/t/ading-stdlib-as-a-dependency-in-fpm-caused-demo-build-to-fail/11055 "2026-08-17T14:48:12Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![general\_rishkin](https://avatars.discourse-cdn.com/v4/letter/g/a9a28c/32.png) [@general\_rishkin](https://fortran-lang.discourse.group/u/general_rishkin)\
**Post date:** [August 17, 2026, 2:48pm UTC](https://fortran-lang.discourse.group/t/ading-stdlib-as-a-dependency-in-fpm-caused-demo-build-to-fail/11055/1 "2026-08-17T14:48:12Z")

</div>

All I did was add `stdlib` as a dependency in `fpm.toml` and the example demo file failed to build and run. In fact, nothing builds successfully.

Compilation reached 97% before failure:

```auto
libstdlib.so failed.
[97%] Compiling...
/usr/bin/x86_64-linux-gnu-ld.bfd: warning: build/gfortran_8E7A42A570C9EF51/foo/build_dependencies_stdlib_src_stdlib_linalg_iterative_solvers_bicgstab.f90.o: requires executable stack (because the .note.GNU-stack section is executable)
/usr/bin/x86_64-linux-gnu-ld.bfd: build/gfortran_8E7A42A570C9EF51/foo/build_dependencies_stdlib_src_stdlib_bitsets_large.f90.o: warning: relocation against ` __stdlib_bitsets_MOD___ vtab_stdlib_bitsets_Bitset_large' in read-only section `.text'
/usr/bin/x86_64-linux-gnu-ld.bfd: build/gfortran_8E7A42A570C9EF51/foo/build_dependencies_stdlib_src_stdlib_linalg_iterative_solvers_bicgstab.f90.o: relocation R_X86_64_PC32 against symbol ` __stdlib_linalg_iterative_solvers_MOD___ vtab_4A5BD6B' can not be used when making a shared object; recompile with -fPIC
/usr/bin/x86_64-linux-gnu-ld.bfd: final link failed: bad value
collect2: error: ld returned 1 exit status
<ERROR> Compilation failed for object " libstdlib.so "

```

I am on Ubuntu 26.04.  
My gcc/gfortran version is version 16.0.1 20260322 .

I tried adding `fPIC` via --flag with the same result.

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<div class="post-metadata">

**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:** [August 17, 2026, 10:52pm UTC](https://fortran-lang.discourse.group/t/ading-stdlib-as-a-dependency-in-fpm-caused-demo-build-to-fail/11055/2 "2026-08-17T22:52:19Z")

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The actual error is `final link failed: bad value`, which is not very informative. 🙂

Due to the other warning, one possibility is a bug related to executable stack, GFortran, Linux and stdlib. But I don’t know if that’s the cause.

If you want to get it fixed, create a minimal reproducible example of this bug — minimize the stdlib and all the things you compile, while still getting this exact bug. Then it will be easy to determine what is causing it. You can ask an AI agent to do this for you, they are very good at this kind of thing.