PHP 4.0 Bug #8814: Undefined Versioned Symbol

From: mark@arcabama.com Operating system: Linux 2.2.5 PHP version: 4.0.4 PHP Bug Type: Compile Failure Bug description: Undefined Versioned Symbol I have previously reported a problem with php-4.0.4 failing to compile, aborting with an undefined versioned symbol error (on __ns_name_unpack@@GLIBC_2.1). This problem has been reported here several times, and on all occassions the development team has responded with "this isn't a php problem" feedback. Which is, of course, not very helpful to those people trying to get php to compile. In my case I was finally able to get php to compile by moving all of the resolver libraries out of /usr/lib. Why this should have been necessary I do not know; all I know is that moving: libresolv.a libresolv_p.a libresolv.so (symlinked to /lib/libresolv.so.2) out of /usr/lib allowed php to compile. The relevant section of the config.log file seems to be: =========================== configure:5046: checking for inet_aton in -lbind configure:5065: gcc -o conftest -g -O2 -DLINUX=2 -DUSE_HSREGEX -DUSE_EXPAT -DNO_DL_NEEDED conftes$ configure:5103: checking for inet_aton in -lresolv configure:5122: gcc -o conftest -g -O2 -DLINUX=2 -DUSE_HSREGEX -DUSE_EXPAT -DNO_DL_NEEDED conftes$ /usr/i586-pc-linux-gnu/bin/ld: cannot find -lresolv collect2: ld returned 1 exit status configure: failed program was: #line 5111 "configure" #include "confdefs.h" /* Override any gcc2 internal prototype to avoid an error. */ /* We use char because int might match the return type of a gcc2 builtin and then its argument prototype would still apply. */ char inet_aton(); int main() { inet_aton() ; return 0; } =========================== Apparently, configure looks for inet_aton in -lbind and -lresolv, and when it finds them in both, gets confused. Preventing it from finding the -lresolv libraries solves the problem. I think. I'll be sure when I get my site to work (i.e., I'm wondering if php compiled, but perhaps isn't functional, and is screwing up httpd). In any event, I think this qualifies as an issue to either fix in the configure script, or post a warning about in the INSTALL file. And I hope to Ghu that no one else has to deal with this ridiculously obscure problem! - Mark -- Edit Bug report at: http://bugs.php.net/?id=8814&edit=1