https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62215
Bug ID: 62215
Summary: Updating .mod files on Win32 fails
Product: gcc
Version: 4.9.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: jeffrey.armstrong at approximatrix dot com
Created attachment 33373
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33373&action=edit
Patch to delete existing .mod file prior to updating
Under Win32 using GNU Fortran 4.9.0 or 4.9.1, module files (.mod) are not
updated properly when necessary because the code to do so is simply calling
"rename()" to move the temporary .mod file to the permanent name without first
deleting any existing .mod files. The Windows C runtime states that this
operation will fail if a file of the same target name exists already (see the
"Remarks" section at http://msdn.microsoft.com/en-us/library/zw5t957f.aspx).
Versions 4.8 and earlier of GNU Fortran first performed an "unlink()" on the
existing file to delete it, so this bug is new with the 4.9 series.
I've attached a patch for 4.9.1 that reinstates the unlink operation that was
present in 4.8 and earlier.
