Attempt at detecting 64bit compilation flags between gcc, old, and new versions of...

Gcc accepts -m64, just as newer version of Suncc.
Older Suncc required -xarch=v9 (SPARC) or -xarch=amd64 (x86-64) to generate 64bit code.

diff --git a/configure.in b/configure.in
index d02d7f85beafe3c993eea023a5473fae09c69a08..61d0e951a61377ec5884155cf6e6aa0834575977 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -585,14 +585,73 @@ elif test "$ac_cv_uname_s" = "SunOS"; then
         ac_cv_ps_cols=9
         AC_MSG_RESULT([using nagios-plugins internal ps command (pst3) for solaris])
        if test `isainfo -b` = 64 ; then
-               PST3CFLAGS="-m64"
-               AC_SUBST(PST3CFLAGS)
-               AC_MSG_NOTICE([using 64bit pst3])       
+               pst3_use_64bit=1
+               AC_MSG_NOTICE([using 64bit pst3])
        else
                AC_MSG_NOTICE([using 32bit pst3])
        fi
         EXTRAS_ROOT="$EXTRAS_ROOT pst3"
 
+       if test "$pst3_use_64bit" = 1; then
+               dnl Test if we can actually compile code in 64bit
+               old_cflags=$CFLAGS
+               CFLAGS="$CFLAGS -m64"
+               pst3_64bit_working=0
+               AC_RUN_IFELSE(
+                       [AC_LANG_PROGRAM([], [
+return sizeof(void*) == 8 ? 0 : 1;
+                       ])
+               ],[
+                       PST3CFLAGS="-m64"
+                       AC_SUBST(PST3CFLAGS)
+                       pst3_64bit_working=1
+                       AC_MSG_NOTICE([using -m64 for 64bit code])
+               ],[
+                       pst3_64bit_working=0
+                       AC_MSG_NOTICE([compiler do not like -m64])
+               ])
+               CFLAGS=$old_cflags
+               if test "$pst3_64bit_working" = 0; then
+                       old_cflags=$CFLAGS
+                       CFLAGS="$CFLAGS -xarch=v9"
+                       AC_RUN_IFELSE(
+                               [AC_LANG_PROGRAM([], [
+return sizeof(void*) == 8 ? 0 : 1;
+                               ])
+                       ],[
+                               PST3CFLAGS="-xarch=v9"
+                               AC_SUBST(PST3CFLAGS)
+                               pst3_64bit_working=1
+                               AC_MSG_NOTICE([using -xarch=v9 for 64bit code])
+                       ],[
+                               pst3_64bit_working=0
+                               AC_MSG_NOTICE([compiler do not like -xarch=v9])
+                       ])
+                       CFLAGS=$old_cflags
+               fi
+               if test "$pst3_64bit_working" = 0; then
+                       old_cflags=$CFLAGS
+                       CFLAGS="$CFLAGS -xarch=amd64"
+                       AC_RUN_IFELSE(
+                               [AC_LANG_PROGRAM([], [
+return sizeof(void*) == 8 ? 0 : 1;
+                               ])
+                       ],[
+                               PST3CFLAGS="-xarch=amd64"
+                               AC_SUBST(PST3CFLAGS)
+                               pst3_64bit_working=1
+                               AC_MSG_NOTICE([using -xarch=amd64 for 64bit code])
+                       ],[
+                               pst3_64bit_working=0
+                               AC_MSG_NOTICE([compiler do not like -xarch=amd64])
+                       ])
+                       CFLAGS=$old_cflags
+               fi
+               if test "$pst3_64bit_working" = 0; then
+                       AC_MSG_ERROR([I don't know how to build a 64-bit object!])
+               fi
+       fi
+
 dnl Removing this for the moment - Ton
 dnl Using /usr/ucb/ps on Solaris systems, to avoid truncation
 dnl Limitation that command name is not available