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Expand Fortran file-extension support #1563
Description
The built-in Fortran extension table in src/discover/language.c currently recognizes only:
.f03
.f08
.f90
.f95
This misses several commonly used Fortran extensions, especially in scientific and HPC codebases.
Please expand the Fortran entries to include:
.f
.F
.for
.f77
.fpp
.f90
.f95
.f03
.f08
In particular, .F is important for preprocessed Fortran source files. For example, CP2K uses .F extensively in its source tree:
https://github.com/cp2k/cp2k/tree/master/src
The uppercase .F extension is intentional: in many Fortran build systems it distinguishes source files that are passed through the C preprocessor from ordinary .f/.f90 sources.
Requested change
Update the Fortran section of src/discover/language.c to recognize at least:
/* Fortran */
{".f", CBM_LANG_FORTRAN},
{".F", CBM_LANG_FORTRAN},
{".for", CBM_LANG_FORTRAN},
{".f77", CBM_LANG_FORTRAN},
{".fpp", CBM_LANG_FORTRAN},
{".f90", CBM_LANG_FORTRAN},
{".f95", CBM_LANG_FORTRAN},
{".f03", CBM_LANG_FORTRAN},
{".f08", CBM_LANG_FORTRAN},Please also add or update tests covering these extensions.
Reference: CP2K source tree, which contains extensive use of preprocessed .F Fortran sources:
https://github.com/cp2k/cp2k/tree/master/src
Activity
DeusData commentedon Aug 12, 2026
Thank you @huxs001. Confirmed on current
main: the built-in Fortran table contains only.f03,.f08,.f90, and.f95. Extension matching usesstrcmp, so uppercase.Fmust be listed explicitly and cannot be covered by lowercase.f.Routed as a normal-priority language coverage enhancement under #592, including tests for the fixed-form and preprocessed suffixes you listed.
DeusData commentedon Oct 19, 2026
Thank you again for the Fortran extension examples, particularly uppercase .F in preprocessed sources. I do not have a new implementation result to report; the requested suffix coverage remains recorded here, with no additional examples needed now.
DeusData commentedon Oct 25, 2026
Thank you for the Fortran suffix examples, including uppercase .F. The requested discovery coverage remains outstanding; no more examples are needed. Sorry for the delay; this is waiting on maintainer follow-up, and I’ll follow up soon.