Given the two following Makefile fragments Makefile ------------ define INCLUDE_template ifneq ($(MAKECMDGOALS),clean) -include $(1) endif endef PROGRAMS := a a_ABS_OFILES := osbasic.o $(foreach prog_file,$(PROGRAMS),$(eval $(call INCLUDE_template,$($(prog_file)_ABS_OFILES:.o=.d)))) osbasic.d -------------- source/lib/linux/osbasic.o source/lib/linux/osbasic.d : GNUmakefile GNUmakefile.rules source/lib/linux/Makefile source/lib/linux/osbasic.c osbasic.h source/lib/linux/osrep.h \ osbasic.h ossync.h ostypes.h when running Make 3.80 freshly compiled on a Duron process x86 machine under Redhat 8.0 on kernel 2.4.18-17.8.0 will give the following error make: *** virtual memory exhauster. Stop. The problem is in the routine variable_expand_string in how it handles access to variable_buffer. When the problem occurs it has been called to expand the $(eval $(call ... code above and it does this using the default variable_buffer size of 200. When this routine is called recursively to handle expanding the osbasic.d contents the variable_buffer has to be expanded as the contents of osbasic.d are over 200 bytes long. This is done by the call to realloc which moves variable_buffer. However when we return to the outer invocation of variable_expand_string it still has its local variable 'o', used as the next location in variable_buffer to use, set to the old location of variable_buffer before it was expanded/moved. This then leads to some crazy pointer arithmetic and the attempt to allocate some very big buffers and hence the error seen. The somewhat obvious fix for this problem would be to make the return function from variable_buffer_output just an offset into the buffer rather than the absolute pointer into the buffer. However this routine is used so frequently and at times in other functions arithmetic is performed directly on variable_buffer that this does not appear to be a simple patch and some one more familiar with this code might be able to suggest a better solution. Thanks Jon Haswell IBM Research Tel 408 927 2074 Tie 457 2074 Fax 408 927 3030 Tie 457 3030 _______________________________________________ Bug-make mailing list [EMAIL PROTECTED] http://mail.gnu.org/mailman/listinfo/bug-make
