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Postings from November 2003
Heiko Schlichting said that I could/should forward this to the list. Seems interesting. I've not yet looked at Configure, or what it's up to in the CPP tests, but it seems that we have enough information to work round the problem. (without needing to assign blame either way] Nicholas Clark ----- Forwarded message from Heiko Schlichting <heiko@FU-Berlin.DE> ----- Date: Mon, 17 Nov 2003 18:17:42 +0100 From: Heiko Schlichting <heiko@FU-Berlin.DE> To: jim@rrsl.rsmas.miami.edu, Nicholas Clark <nick@ccl4.org> Subject: [perl #24471] gv.c: identifier "copy" is undefined User-Agent: Mutt/1.5.4i Jim, Nick, I noticed your conversion on the perlbug list but as I'm not on the list myself please excuse that I bother both of you with personal mail. I noticed the same problem which Jim reported on my systems using IRIX MIPS compiler 7.4.1 too. The problem occurs with perl 5.6.1 and 5.8.2 (didn't tried other versions). Without the modifications Nick suggested I can fix the problem setting cpp_stuff='42' in config.sh before Configure distributes it variables. Looking at the code of Configure I assume that it is not are problem of the compiler but a misbehavior of Configure testing with cppstdin instead of cc -E with input from a file. The IRIX compiler behaves in a different way for input from stdin and for input from a file: ----------------------------------------------- | [heiko@Punkt] 107 (/tmp): cat cpp_stuff.c | #define RCAT(a,b)a/**/b | #define ACAT(a,b)a ## b | RCAT(Rei,ser) | ACAT(Cir,cus) ----------------------------------------------- | [heiko@Punkt] 108 (/tmp): cc -E - < cpp_stuff.c | # 1 "" | | | Reiser | Cir ## cus ----------------------------------------------- | [heiko@Punkt] 109 (/tmp): cc -E cpp_stuff.c | #line 1 "cpp_stuff.c" | | | Rei ser | Circus ----------------------------------------------- Surprising, but not really a bug. The Configure script tests with input from stdin but during compilation it used input from a file. Correcting this manually by changing cpp_stuff='1' into cpp_stuff='42' seems to fix the problem - at least for me. If you find this information valuable for someone else you have my permission to forward this text or the information where ever you want (with or without mentioning me). Heiko Heiko Schlichting | Freie Universität Berlin heiko@FU-Berlin.DE | Zentraleinrichtung für Datenverarbeitung (ZEDAT) Telefon +49 30 838-54327 | Fabeckstraße 32 Telefax +49 30 838454327 | 14195 Berlin ----- End forwarded message -----