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    SubjectRe: [PATCH v2] kbuild: prevent make from deleting _shipped files
    From
    Hi,

    On Sun, Jul 31, 2011 at 2:45 PM, Peter Foley <pefoley2@verizon.net> wrote:
    > commit 7373f4f (kbuild: add implicit rules for parser generation)
    > created a implicit rule chain (%.c: %.c_shipped: %.y).
    > Make considers the _shipped files to be intermediate files which
    > causes them to be deleted if they didn't exist before make was run.
    > Mark the _shipped files PRECIOUS to prevent make from deleting them.
    >
    > Signed-off-by: Peter Foley <pefoley2@verizon.net>

    Acked-by: Arnaud Lacombe <lacombar@gmail.com>

    - Arnaud

    > ---
    >
    > V2: update changelog to specify files are only deleted when they did not
    > already exist
    >
    > diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
    > index aeea84a..5d986d9 100644
    > --- a/scripts/Makefile.lib
    > +++ b/scripts/Makefile.lib
    > @@ -167,6 +167,7 @@ ifdef REGENERATE_PARSERS
    >  quiet_cmd_gperf = GPERF $@
    >       cmd_gperf = gperf -t --output-file $@ -a -C -E -g -k 1,3,$$ -p -t $<
    >
    > +.PRECIOUS: $(src)/%.hash.c_shipped
    >  $(src)/%.hash.c_shipped: $(src)/%.gperf
    >        $(call cmd,gperf)
    >
    > @@ -177,6 +178,7 @@ LEX_PREFIX = $(if $(LEX_PREFIX_${baseprereq}),$(LEX_PREFIX_${baseprereq}),yy)
    >  quiet_cmd_flex = LEX     $@
    >       cmd_flex = flex -o$@ -L -P $(LEX_PREFIX) $<
    >
    > +.PRECIOUS: $(src)/%.lex.c_shipped
    >  $(src)/%.lex.c_shipped: $(src)/%.l
    >        $(call cmd,flex)
    >
    > @@ -187,12 +189,14 @@ YACC_PREFIX = $(if $(YACC_PREFIX_${baseprereq}),$(YACC_PREFIX_${baseprereq}),yy)
    >  quiet_cmd_bison = YACC    $@
    >       cmd_bison = bison -o$@ -t -l -p $(YACC_PREFIX) $<
    >
    > +.PRECIOUS: $(src)/%.tab.c_shipped
    >  $(src)/%.tab.c_shipped: $(src)/%.y
    >        $(call cmd,bison)
    >
    >  quiet_cmd_bison_h = YACC    $@
    >       cmd_bison_h = bison -o/dev/null --defines=$@ -t -l -p $(YACC_PREFIX) $<
    >
    > +.PRECIOUS: $(src)/%.tab.h_shipped
    >  $(src)/%.tab.h_shipped: $(src)/%.y
    >        $(call cmd,bison_h)
    >
    >
    >
    --
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