The ustr Makefile.in (as introduced by the Debian patch we apply), is
probably not parallel-safe:
402 install: install-opt install-dbg
403
404 install-opt: install-dirs install-opt-lib install-common
405
406 install-dbg: install-dirs install-dbg-lib install-common
407
408 install-opt-lib install-dbg-lib install-common: install-dirs
[--SNIP--]
424 install-opt-lib: $(OPT_LIB_STATIC) $(OPT_LIB_SHARED) ustr.pc
425 @echo Installing files
426 install -m 644 -t $(DESTDIR)$(libdir) $(OPT_LIB_STATIC)
427 install -m 755 -t $(DESTDIR)$(libdir) $(OPT_LIB_SHARED)
428 -rm -f $(DESTDIR)$(libdir)/$(OPT_LIB_SHARED_NAME)
429 ln -s $(OPT_LIB_SHARED) $(DESTDIR)$(libdir)/$(OPT_LIB_SHARED_NAME)
430 -rm -f $(DESTDIR)$(libdir)/$(OPT_LIB_SHAREDEV)
431 ln -s $(OPT_LIB_SHARED_NAME) $(DESTDIR)$(libdir)/$(OPT_LIB_SHAREDEV)
432 -rm -f $(DESTDIR)$(libdir)/$(OPT_LIB_SHAREDEV_BSO)
433 ln -s $(OPT_LIB_SHARED_NAME) $(DESTDIR)$(libdir)/$(OPT_LIB_SHAREDEV_BSO)
434 $(LDCONFIG) -n $(DESTDIR)$(libdir)
435 install -pm 644 -t $(DESTDIR)$(libdir)/pkgconfig ustr.pc
436
437 install-dbg-lib: $(DBG_LIB_STATIC) $(DBG_LIB_SHARED) ustr-debug.pc
438 @echo Installing files
439 install -m 644 -t $(DESTDIR)$(libdir) $(DBG_LIB_STATIC)
440 install -m 755 -t $(DESTDIR)$(libdir) $(DBG_LIB_SHARED)
441 -rm -f $(DESTDIR)$(libdir)/$(DBG_LIB_SHARED_NAME)
442 ln -s $(DBG_LIB_SHARED) $(DESTDIR)$(libdir)/$(DBG_LIB_SHARED_NAME)
443 -rm -f $(DESTDIR)$(libdir)/$(DBG_LIB_SHAREDEV)
444 ln -s $(DBG_LIB_SHARED_NAME) $(DESTDIR)$(libdir)/$(DBG_LIB_SHAREDEV)
445 -rm -f $(DESTDIR)$(libdir)/$(DBG_LIB_SHAREDEV_BSO)
446 ln -s $(DBG_LIB_SHARED_NAME) $(DESTDIR)$(libdir)/$(DBG_LIB_SHAREDEV_BSO)
447 $(LDCONFIG) -n $(DESTDIR)$(libdir)
448 install -pm 644 -t $(DESTDIR)$(libdir)/pkgconfig ustr-debug.pc
As Thomas already noticed [0], the two interesting rules above are not
dependent one on the other, so can be run in parallel. So, while one is
doing its rm'n'ln dance, the other can be running an ldconfig, which has
the side effect of creating the missing symlinks. So, we can see this
sequence:
install-opt-lib: install-dbg-lib:
ldconfig
rm -f .../$(OPT_LIB_SHAREDEV) \
`-> symlink(..., .../$(OPT_LIB_SHAREDEV))
ln -s .../$(OPT_LIB_SHAREDEV)
In this case, ldconfig uses the opportunity-window between the rm and
the ln to create the link; so the ln does not work, as the target
already exist.
We fix that by not running ldconfig at all in Buildroot, we just pass
LDCONFIG=/bin/true .
Fixes (hopefully, since I was not even able to reproduce the failure):
http://autobuild.buildroot.org/?reason=ustr-1.0.4http://autobuild.buildroot.org/results/936/93626f55625ed7900c147bfd79ff7802366639b1/http://autobuild.buildroot.org/results/18b/18b6ec537da9e9055f58a8649c0719dc64df1bcf/
[...]
[0] http://lists.busybox.net/pipermail/buildroot/2016-May/161923.html
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Clayton Shotwell <clayton.shotwell@rockwellcollins.com>
Cc: Arnout Vandecappelle <arnout@mind.be>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
99067c1598