On Fri, Aug 28 2026, Quentin Schulz <[email protected]> wrote:
> Note that you must erase your build AND test directories whenever you
> switch fedora 44 between openssl-devel-engine installed and removed as
> the build system doesn't know that the content of the header files
> have changed (and thus, our #ifdefs). I don't have a plan on how to
> address this (if it even must be addressed).
>From gcc's info page:
‘-MD’
‘--write-dependencies’
‘-MD’ is equivalent to ‘-M -MF FILE’, except that ‘-E’ is not
implied. The driver determines FILE based on whether an ‘-o’
option is given. If it is, the driver uses its argument but with a
suffix of ‘.d’, otherwise it takes the name of the input file,
removes any directory components and suffix, and applies a ‘.d’
suffix.
If ‘-MD’ is used in conjunction with ‘-E’, any ‘-o’ switch is
understood to specify the dependency output file (*note -MF:
dashMF.), but if used without ‘-E’, each ‘-o’ is understood to
specify a target object file.
Since ‘-E’ is not implied, ‘-MD’ can be used to generate a
dependency output file as a side effect of the compilation process.
‘-MMD’
‘--write-user-dependencies’
Like ‘-MD’ except mention only user header files, not system header
files.
We use -MMD, but doing
diff --git a/scripts/Makefile.host b/scripts/Makefile.host
index bb6d69ca37c..13266654640 100644
--- a/scripts/Makefile.host
+++ b/scripts/Makefile.host
@@ -81,8 +81,8 @@ _hostcxx_flags += -I $(srctree)/$(src) -I $(objtree)/$(obj)
endif
endif
-hostc_flags = -Wp,-MMD,$(depfile) $(_hostc_flags)
-hostcxx_flags = -Wp,-MMD,$(depfile) $(_hostcxx_flags)
+hostc_flags = -Wp,-MD,$(depfile) $(_hostc_flags)
+hostcxx_flags = -Wp,-MD,$(depfile) $(_hostcxx_flags)
#####
# Compile programs on the host
and looking at tools/.mkimage.o.cmd, it does seem to then pick up
/usr/include/... files as well.
Whether that is something we want to do for real IDK. If we want it, we
should probably ensure the kernel is also ok with such a change in order
not to deviate without good reason.
I hope to be able to look at the actual series some time next week; I'd
much prefer to get switched over to provider API everywhere ASAP,
because currently it's somewhat of a mess to use one or the other for
the various parts of the BSP build.
Rasmus
