*** pgsql/configure.in	2006/10/30 22:15:04	1.485
--- pgsql/configure.in	2006/11/06 03:44:37	1.486
***************
*** 1,5 ****
  dnl Process this file with autoconf to produce a configure script.
! dnl $PostgreSQL: pgsql/configure.in,v 1.484 2006/10/23 22:50:19 tgl Exp $
  dnl
  dnl Developers, please strive to achieve this order:
  dnl
--- 1,5 ----
  dnl Process this file with autoconf to produce a configure script.
! dnl $PostgreSQL: pgsql/configure.in,v 1.485 2006/10/30 22:15:04 petere Exp $
  dnl
  dnl Developers, please strive to achieve this order:
  dnl
*************** AC_DEFINE_UNQUOTED(PG_VERSION_NUM, $PG_V
*** 640,648 ****
  ##
  ## Libraries
  ##
  
  AC_SEARCH_LIBS(setproctitle, util)
- AC_SEARCH_LIBS(pow, m)
  AC_SEARCH_LIBS(dlopen, dl)
  AC_SEARCH_LIBS(socket, [socket wsock32])
  AC_SEARCH_LIBS(shl_load, dld)
--- 640,653 ----
  ##
  ## Libraries
  ##
+ ## Most libraries are included only if they demonstrably provide a function
+ ## we need, but libm is an exception: always include it, because there are
+ ## too many compilers that play cute optimization games that will break
+ ## probes for standard functions such as pow().
+ ##
  
+ AC_CHECK_LIB(m, main)
  AC_SEARCH_LIBS(setproctitle, util)
  AC_SEARCH_LIBS(dlopen, dl)
  AC_SEARCH_LIBS(socket, [socket wsock32])
  AC_SEARCH_LIBS(shl_load, dld)