[bug #45438] -include file prerequisites not found, give no error

[Joe Sewell]

URL:
  <http://savannah.gnu.org/bugs/?45438>

                 Summary: -include file prerequisites not found, give no error
                 Project: make
            Submitted by: ultrajoe
            Submitted on: Mon 29 Jun 2015 06:15:42 PM GMT
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
       Component Version: 3.81
        Operating System: POSIX-Based
           Fixed Release: None
           Triage Status: None

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Details:

Consider the following makefile:


# Remove ALL default rules
.SUFFIXES:
(%): %
%.out: %
%.c: %.w %.ch
%.tex: %.w %.ch
%:: %.v
%:: RCS/%,v
%:: RCS/%
%:: s.%
%:: SCCS/s.%

SOURCES = a.c b.c

OBJS = $(SOURCES:%.c=%.o)

DEPFILES = $(SOURCES:%.c=%.c.d)

EXE = a

.PHONY: all
all: $(EXE)

$(DEPFILES): %.c.d : %.c
        @echo "Determining dependencies for $(<F)"
        @$(CC) -E -MM -MF$@ -MP $<

$(OBJS): %.o: %.c
        @echo "Compiling $(<F)"
        @$(CC) -c $< -o $@

$(EXE): $(OBJS)
        @echo "Linking $(@F)"
        @$(CC) $+ -o $@

# This seems to be the troublemaking line!
-include $(DEPFILES)


If one or both source files do not exist, processing for the -include
directive notices this, but generates no error, I suppose because of the
-include. By the time it gets to the other targets, however, the
already-processed files are "Pruned." The end result is no generated error
message, but make exits with a status of 2. (Sorry, I'd love to give the
output of a make -d on this, but my Linux machine is on an isolated secured
network. For similar reasons I am unable to see if this has been fixed in
later versions, though perusing the bug list tells me it has not.)




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