https://sourceware.org/bugzilla/show_bug.cgi?id=25540
Bug ID: 25540
Summary: using the same filename for MAP and DLL fails silently
with file corruption
Product: binutils
Version: 2.30
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: draymond at foxvalley dot net
Target Milestone: ---
I discovered this due to an error in my Makefile. I was using
"-Wl,-Map=$(@:.dll=.map) -o $@" on the command line but the target was foo.pyd
(not foo.dll). Therefore I inadvertantly specified the same filename for the
map file and the output file. This caused the linker to fail silently (no
warnings or errors) and generate a corrupt output file. The section headers
pointed to areas in the file that did not contain the expected sections.
When doing the same thing using lld it succeeds with a valid output file but no
map file is generated.
It would be better for ld to detect the duplicate filename and fail with a
helpful error message or to mimic the behavior of lld.
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