On May 24, 2012, at 06:18 , Ian Lance Taylor wrote: >> (install-unwind_h): Reinstate, copy to user install destination >> for include files, not to the internal gcc object directory one. >> (install-leaf): Depend on it. > > The effect is that every time libgcc is built, unwind.h > changes. And the effect of that is that every library file that depends on > unwind.h gets rebuilt every time. This affects libgo and libitm.
> Please fix this one way or another so that the copy of unwind.h installed
> in the gcc object directory does not have its timestamp change if the
> file contents are unchanged, as it used to be.
Sure, sorry for the inconvenience. The intent was to
* not touch what used to be done for "all", with
-install-unwind_h:
+install-unwind_h-forbuild:
-all: install-unwind_h
+all: install-unwind_h-forbuild
* add something to have unwind.h copied as well for "install".
I added that via an extra rule+dep to install-leaf, thinking that
it was only used as helper for "install". I missed that install-leaf
is also invoked for "all", via a command and not a dep.
The attached patch should fix it. Testing in progress ...
Olivier
2012-05-24 Olivier Hainque <hain...@adacore.com>
libgcc/
* Makefile.in: move dependency on install-unwind_h from
"install-leaf" to "install".
unwh.diff
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