# reset
_DEC_cc_style=
case "$isgcc" in
-gcc) _gcc_version=`$cc --version 2>&1 | tr . ' '`
- set $_gcc_version
- if test "$1" -lt 2 -o \( "$1" -eq 2 -a \( "$2" -lt 95 -o \( "$2" -eq 95 -a "$3" -lt 2 \) \) \); then
+gcc) if [ "X$gccversion" = "X" ]; then
+ # Done too late in Configure if hinted
+ gccversion=`$cc --version | sed 's/.*(GCC) *//'`
+ fi
+ set $gccversion
+ if test "$1" -lt 2 -o \( "$1" -eq 2 -a \( "$2" -lt 95 -o \( "$2" -eq 95 -a "$3" -lt 3 \) \) \); then
cat >&4 <<EOF
-*** Your cc seems to be gcc and its version ($_gcc_version) seems to be
-*** less than 2.95.2. This is not a good idea since old versions of gcc
+*** Your cc seems to be gcc and its version ($gccversion) seems to be
+*** less than 2.95.3. This is not a good idea since old versions of gcc
*** are known to produce buggy code when compiling Perl (and no doubt for
*** other programs, too).
***
;;
esac
+## Optimization limits
+case "$isgcc" in
+gcc) # gcc 3.2.1 wants a lot of memory for -O3'ing toke.c
+cat >try.c <<EOF
+#include <sys/resource.h>
+
+int main ()
+{
+ struct rlimit rl;
+ int i = getrlimit (RLIMIT_DATA, &rl);
+ printf ("%d\n", rl.rlim_cur / (1024 * 1024));
+ } /* main */
+EOF
+$cc -o try $ccflags $ldflags try.c
+ maxdsiz=`./try`
+rm -f try try.c core
+if [ $maxdsiz -lt 256 ]; then
+ # less than 256 MB is probably not enough to optimize toke.c with gcc -O3
+ cat <<EOM >&4
+
+Your process datasize is limited to $maxdsiz MB, which is (sadly) not
+always enough to fully optimize some source code files of Perl,
+at least 256 MB seems to be necessary as of Perl 5.8.0. I'll try to
+use a lower optimization level for those parts. You could either try
+using your shell's ulimit/limit/limits command to raise your datasize
+(assuming the system-wide hard resource limits allow you to go higher),
+or if you can't go higher and if you are a sysadmin, and you *do* want
+the full optimization, you can tune the 'max_per_proc_data_size'
+kernel parameter: see man sysconfigtab, and man sys_attrs_proc.
+
+EOM
+toke_cflags='optimize=-O2'
+ fi
+;;
+esac
+
# we want dynamic fp rounding mode, and we want ieee exception semantics
case "$isgcc" in
gcc) ;;
*[1-4].0*) d_modfl=undef ;; # must wait till 5.0
esac
-# Keep those leading tabs.
- needusrshlib=''
+# Keep that leading tab.
old_LD_LIBRARY_PATH=$LD_LIBRARY_PATH
for p in $loclibpth
do
- if test -n "`ls $p/libdb.so* 2>/dev/null`"; then
- needusrshlib=yes
- fi
if test -d $p; then
echo "Appending $p to LD_LIBRARY_PATH." >& 4
case "$LD_LIBRARY_PATH" in
"$old_LD_LIBRARY_PATH") ;;
*) echo "LD_LIBRARY_PATH is now $LD_LIBRARY_PATH." >& 4 ;;
esac
-# This is evil but I can't think of a nice workaround:
-# the /usr/shlib/libdb.so needs to be seen first,
-# or running Configure will fail.
-if test -n "$needusrshlib"; then
- echo "Prepending /usr/shlib to loclibpth." >& 4
- loclibpth="/usr/shlib $loclibpth"
- echo "loclibpth is now $loclibpth." >& 4
-fi
+case "$LD_LIBRARY_PATH" in
+'') ;;
+* ) export LD_LIBRARY_PATH ;;
+esac
#
# Unset temporary variables no more needed.