Hello, One year after, here's the test Makefile.
And here are the results, even worse than they were before. First, let's run ye olde goode make 3.81: $ make --version GNU Make 3.81 Copyright (C) 2006 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. This program built for i486-pc-linux-gnu $ rm *.o *.a $ make touch a.o ar rv test.a a.o ar: creating test.a a - a.o touch b.o ar rv test.a b.o a - b.o touch c.o ar rv test.a c.o a - c.o $ cat test.a !<arch> a.o/ 1375039924 1000 1000 100644 0 ` b.o/ 1375039924 1000 1000 100644 0 ` c.o/ 1375039924 1000 1000 100644 0 ` So far so good, it works as intended. Now let's try make 3.82: $ rm *.o *.a $ ./make --version GNU Make 3.82 Built for i486-pc-linux-gnu Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. $ ./make ... and nothing happens for a long time. Then I run this on a different terminal: $ ps aux | grep make | head -n1 andrew 3621 103 0.0 3996 848 pts/12 R+ 21:33 0:09 ./make Wow, it's consuming 103% (!) of the CPU time! :) Cool. Let's run it with -d: $ ./make -d GNU Make 3.82 Built for i486-pc-linux-gnu Copyright (C) 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Reading makefiles... Reading makefile `Makefile'... Updating makefiles.... Considering target file `Makefile'. Looking for an implicit rule for `Makefile'. Trying pattern rule with stem `Makefile'. Trying implicit prerequisite `Makefile.o'. [snip] No implicit rule found for `all'. Considering target file `a.o)'. File `a.o)' does not exist. Looking for an implicit rule for `a.o)'. Trying pattern rule with stem `a.o)'. Trying implicit prerequisite `a.o).o'. Trying pattern rule with stem `a.o)'. Trying implicit prerequisite `a.o).c'. [snip] Trying pattern rule with stem `a.o)'. Trying implicit prerequisite `SCCS/s.a.o)'. Trying pattern rule with stem `a.o)'. Trying implicit prerequisite `a.o).o'. Looking for a rule with intermediate file `a.o).o'. Avoiding implicit rule recursion. Trying pattern rule with stem `a.o)'. Trying implicit prerequisite `a.o).c'. [snip] Trying implicit prerequisite `SCCS/s.a.o).o'. Trying pattern rule with stem `a.o)'. Trying implicit prerequisite `a.o).c'. Looking for a rule with intermediate file `a.o).c'. Avoiding implicit rule recursion. Avoiding implicit rule recursion. Trying pattern rule with stem `a.o)'. Trying implicit prerequisite `a.o).y'. Trying pattern rule with stem `a.o)'. Trying implicit prerequisite `a.o).l'. [snip] Trying implicit prerequisite `RCS/a.o).sh'. Trying pattern rule with stem `a.o).sh'. Trying implicit prerequisite `s.a.o).sh'. Trying pattern rule with stem `a.o).sh'. Trying implicit prerequisite `SCCS/s.a.o).sh'. No implicit rule found for `a.o)'. Finished prerequisites of target file `a.o)'. Must remake target `a.o)'. make: *** No rule to make target `a.o)', needed by `all'. Stop. Fun, innit? -- WBR, Andrew
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