Hello- GNU Make 3.80 has a bug which causes it to try to allocate negative amounts of memory (which ends up something like 4 gigabytes) under certain conditions. This leads to the message:
make: *** virtual memory exhausted. Stop. The problem is reproducible with this shell script [1]: ============== 8< =============== for a in `seq 1 5`; do touch 0123456789012345678901234567890123$a.c; done cat > Makefile <<'DELIM' define BUG SRC := $$(wildcard *.c) #OBJ := $$(SRC:.c=.o) OBJ := $$(patsubst %.c,%.o,$$(SRC)) $$(OBJ):%.o:%.c endef $(eval $(call BUG)) DELIM make ============== 8< =============== It's a known bug which has been fixed in CVS for several months now, but no version has been released in that time. The problem is affecting us here at SDL; we have a non-recursive make structure that uses the $(eval $(call foo)) method, and it produces this same error after only a very few included files. It would be great to have a fix put in the Cygwin make package. The following patch[1] corrects the problem, and applies to the Cygwin make-3.80-1 source. paul [1] The shell script and patch were adapted from notes under Debian bug #197886 : http://bugs.debian.org/197886 diff -Naur make-3.80-1/expand.c make-3.80-1.patched/expand.c --- make-3.80-1/expand.c 2002-07-11 00:38:57.000000000 -0600 +++ make-3.80-1.patched/expand.c 2003-12-03 16:48:06.582570500 -0700 @@ -564,3 +564,28 @@ return value; } + +/* Install a new variable_buffer context, returning the current one for + safe-keeping. */ + +void +install_variable_buffer (char **bufp, unsigned int *lenp) +{ + *bufp = variable_buffer; + *lenp = variable_buffer_length; + + variable_buffer = 0; + initialize_variable_output (); +} + +/* Restore a previously-saved variable_buffer setting (free the current one). + */ + +void +restore_variable_buffer (char *buf, unsigned int len) +{ + free (variable_buffer); + + variable_buffer = buf; + variable_buffer_length = len; +} diff -Naur make-3.80-1/function.c make-3.80-1.patched/function.c --- make-3.80-1/function.c 2002-11-23 14:08:14.000000000 -0700 +++ make-3.80-1.patched/function.c 2003-12-03 16:48:06.598193600 -0700 @@ -1281,8 +1281,18 @@ char **argv; const char *funcname; { + char *buf; + unsigned int len; + + /* Eval the buffer. Pop the current variable buffer setting so that the + eval'd code can use its own without conflicting. */ + + install_variable_buffer (&buf, &len); + eval_buffer (argv[0]); + restore_variable_buffer (buf, len); + return o; } diff -Naur make-3.80-1/variable.h make-3.80-1.patched/variable.h --- make-3.80-1/variable.h 2002-08-07 18:11:19.000000000 -0600 +++ make-3.80-1.patched/variable.h 2003-12-03 16:48:06.582570500 -0700 @@ -107,6 +107,8 @@ extern char *expand_argument PARAMS ((char *str, char *end)); extern char *variable_expand_string PARAMS ((char *line, char *string, long length)); +extern void install_variable_buffer PARAMS ((char **bufp, unsigned int *lenp)); +extern void restore_variable_buffer PARAMS ((char *buf, unsigned int len)); /* function.c */ extern int handle_function PARAMS ((char **op, char **stringp)); -- .------------------------------------------------------------. | paul cannon [EMAIL PROTECTED] | | http://people.debian.org/~pik/ | -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
