http://sourceware.org/bugzilla/show_bug.cgi?id=12742
Summary: ld error "unrecognized option '-plugin'" on mingw and
how to build with plugins enabled on mingw
Product: binutils
Version: 2.21
Status: NEW
Severity: normal
Priority: P2
Component: ld
AssignedTo: unassig...@sources.redhat.com
ReportedBy: vanboxem.ru...@gmail.com
Building binutils and gcc with --enable-lto does not, in fact allow it to be
used.
The error message:
ld.exe: unrecognized option '-plugin'
when compiling+linking a simple test file with "g++ -flto main.cpp -o test.exe"
I attempted to rebuild binutils with "--enable-plugins", but the build fails in
libbfd, among other things.
What needs to happen to allow binutils built with "--enable-plugins" on mingw:
1. ld/plugin.c has a code block that defines functions not present on windows
between #if !defined (HAVE_DLFNC_H) && defined (HAVE_DLFNC_H) ... #endif. These
should also be present in bfd/plugin.c. Additionally, the windows.h header
checks should be moved to bfd/configure and bfd/config.h (they are missing)
2. the binutils subdirectory tries to link -ldl, but this isn't right on
Windows, just link -lkernel32 instead for mingw targets/hosts (don't know where
to change that at all).
3. Perhaps enable plugins by default for binutils for mingw after this change
(maybe only if "--enable-lto" is specified)
I wish I could provide a patch, but I'm unable to locate some crucial parts
that need to be modified for this to work.
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