Remove some of the more egregious crack in the configure.in script.

--- mozilla/nsprpub/configure.in.orig	2009-02-18 13:12:46.000000000 +0000
+++ mozilla/nsprpub/configure.in	2009-02-18 13:39:28.000000000 +0000
@@ -42,7 +42,7 @@
 AC_PREREQ(2.12)
 AC_INIT(config/libc_r.h)
 
-AC_CONFIG_AUX_DIR(${srcdir}/build/autoconf)
+AC_CONFIG_AUX_DIR(build/autoconf)
 AC_CANONICAL_SYSTEM
 
 dnl ========================================================
@@ -427,7 +427,7 @@
 
     AC_MSG_CHECKING([whether the $host compiler ($HOST_CC $HOST_CFLAGS $HOST_LDFLAGS) works])
     AC_TRY_COMPILE([], [return(0);], 
-        [ac_cv_prog_host_cc_works=1 AC_MSG_RESULT([yes])],
+        [ac_cv_prog_host_cc_works=1; AC_MSG_RESULT([yes])],
         AC_MSG_ERROR([installation or configuration problem: $host compiler $HOST_CC cannot create executables.]) )
 
     CC=$_SAVE_CC
@@ -509,6 +509,11 @@
 fi
 rm -f a.out
 
+# RWMJ: Just force the above:
+GNU_CC=1
+GNU_CXX=1
+GNU_AS=1
+
 case "$build:$target" in
     i?86-apple-darwin*:powerpc-apple-darwin*)
         dnl cross_compiling will have erroneously been set to "no" in this
@@ -2212,9 +2217,11 @@
 *-darwin*|*-beos*)
     ;;
 *)
-    AC_CHECK_LIB(dl, dlopen,
-        AC_CHECK_HEADER(dlfcn.h,
-            OS_LIBS="-ldl $OS_LIBS"))
+    AC_CHECK_LIB([dl], [dlopen], [have_dl=yes])
+    AC_CHECK_HEADER([dlfcn.h], [have_dlfcn=yes])
+    if test -n "$have_dl" -a -n "$have_dlfcn"; then
+      OS_LIBS="-ldl $OS_LIBS"
+    fi
     ;;
 esac