It seems the attached Makefile will fail for a clean build. I read
through the docs
and it seems that there is nothing that says this should not work. The
problem
is a invalid assumption that if a implicit prerequisite's directory does
not
exist at the beginning then it must not be a candidate. It fails to not
notice
that during the bulding of other rules the directory will in fact be
created.
This is an example Makefile that shows the problem.
firstly:
make setup # make some empty test files - assume these are source files
make # fails !
make work.i686/file1.out # works - created work.i686 directory
make # works properly now.
If you patch version make-3.79.tar.gz's implicit.c (removing the
assumption
noted above) the Makefile builds without a hitch.
Question 1 : Is there a way with the current make to get around this ?
Question 2 : If the answer is no to Q1 can we introduce this fix in the
next make release ?
Doing this would be very useful for me so that I can make a generic
Makefile
that can enable a source tree to build with multiple kinds of builds
simultaneously.
I have developed a generic base Makefile that can do this but this
bug is really cramping.
Regards
G
------------------------- Patch to implicit.c -----------------
--- implicit.BAK Fri Jan 21 21:43:03 2000
+++ implicit.c Sat Jun 10 15:21:11 2000
@@ -398,8 +398,10 @@
directory (the one gotten by prepending FILENAME's
directory),
so it might actually exist. */
- if ((!dep->changed || check_lastslash)
- && (lookup_file (p) != 0 || file_exists_p (p)))
+/* if ((!dep->changed || check_lastslash)
+ && (lookup_file (p) != 0 || file_exists_p (p))) */
+
+ if ((lookup_file (p) != 0 || file_exists_p (p)))
{
found_files[deps_found++] = xstrdup (p);
continue;
WORKDIR=work.i686
ifeq ($(wildcard $(WORKDIR)),)
DEPEND_DIR=$(WORKDIR)
else
DEPEND_DIR=
endif
# make some sample source files
ifeq ($(wildcard file*.in),)
XX:=$(shell touch file1.in file2.in )
endif
IN_FILES=$(wildcard *.in)
OUTFILES=$(IN_FILES:%.in=$(WORKDIR)/%.out)
all : /tmp/file.inst
$(WORKDIR)/file.inst : $(OUTFILES)
cat $^ > $@
$(WORKDIR)/%.out : %.in $(DEPEND_DIR)
cp $< $@
/tmp/% : $(WORKDIR)/%
cp $< $@
workdir : $(DEPEND_DIR)
$(WORKDIR) :
mkdir -p $(WORKDIR)
clean :
rm -rf $(WORKDIR) /tmp/file.inst
