https://bugs.llvm.org/show_bug.cgi?id=50993
Bug ID: 50993
Summary: flang -E breaks fixed-format files
Product: flang
Version: 12.0
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Frontend
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected],
[email protected]
If the perprocessing-only step is run on a fixed-format Fortran file the
resulting output is no longer fixed-format. This can cause issues in build
systems that perform preprocessing and compilation separately and expect the
preprocessed file to still be valid fixed-format Fortran.
As an example, if you perform preprocessing like this:
flang -E file.f -o file.pp.f
flang file.pp.f
the resulting file will not compile as the compiler expects fixed-format
Fortran but that is no longer the case after preprocessing.
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