[Bug fortran/114922] fsyntax-only need the modules
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114922 --- Comment #5 from Axel Ehrich --- Thank you for the explanation. This resolves the issue.
[Bug fortran/114922] fsyntax-only need the modules
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114922 Mikael Morin changed: What|Removed |Added CC||mikael at gcc dot gnu.org --- Comment #4 from Mikael Morin --- (In reply to Axel Ehrich from comment #3) > In my understanding, the intention of the option -fsyntax-only is to > construct the module files needed to compile the code. A build process > would involve two steps: Step 1: construct all module files with gfortran > -fsyntax only. Step 2: construct the object files without this option, while > relying on the presence of all module files. (I have found this recipe on > the internet and consider it valuable.) > The normal process is to compile directly the files (without -fsyntax-only) in the right order, in a single step. Some people prefer to do it in two steps, depending on their needs. > Alternatively, the purpose of -fsyntax-only could be to save compile time by > a doing quick first check before entering the time consuming parts of the > compilation. Yes, that's the main purpose. > If this syntax check goes so far that it requires the module > files already, the goal mentioned above cannot be reached. Yes, it can. The files have to be compiled in the right order. Keep in mind that the compiler processes one file at a time and doesn't have a global knowledge of all the files together. Consider this example: module m2 use m1 end module m2 What symbols should be made available in the module file for m2? Don't you think that the knowledge of the content of m1 is needed?
[Bug fortran/114922] fsyntax-only need the modules
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114922 --- Comment #3 from Axel Ehrich --- The question is related to the actual purpose of the option -fsyntax only: In my understanding, the intention of the option -fsyntax-only is to construct the module files needed to compile the code. A build process would involve two steps: Step 1: construct all module files with gfortran -fsyntax only. Step 2: construct the object files without this option, while relying on the presence of all module files. (I have found this recipe on the internet and consider it valuable.) Alternatively, the purpose of -fsyntax-only could be to save compile time by a doing quick first check before entering the time consuming parts of the compilation. If this syntax check goes so far that it requires the module files already, the goal mentioned above cannot be reached.
[Bug fortran/114922] fsyntax-only need the modules
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114922 kargls at comcast dot net changed: What|Removed |Added CC||kargls at comcast dot net --- Comment #2 from kargls at comcast dot net --- While Harald gave one reason, consider the simply program use foo, only bar x = bar(1.) end gfortran needs information about 'bar'. Is it an array, function, or subroutine?
[Bug fortran/114922] fsyntax-only need the modules
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114922 anlauf at gcc dot gnu.org changed: What|Removed |Added Resolution|--- |INVALID Status|UNCONFIRMED |RESOLVED --- Comment #1 from anlauf at gcc dot gnu.org --- The documentation says: -fsyntax-only Check the code for syntax errors, but do not actually compile it. This will generate module files for each module present in the code, but no other output file. So if you do not provide the needed modules, you should get exactly the same errors as when compiling without -fsyntax-only.
