configure: Compile as 32-bit on powerpc64

[André Hentschel]

with much help from Austin English
---
 configure.ac |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/configure.ac b/configure.ac
index 1340757..c47a927 100644
--- a/configure.ac
+++ b/configure.ac
@@ -148,6 +148,19 @@ case $host in
       enable_win16=${enable_win16:-yes}
     fi
     ;;
+  powerpc64*)
+    CC="$CC -m32"
+    CXX="$CXX -m32"
+    AC_MSG_CHECKING([whether $CC works])
+    AC_LINK_IFELSE([AC_LANG_PROGRAM()],AC_MSG_RESULT([yes]),
+                 [AC_MSG_RESULT([no])
+                  AC_MSG_ERROR([Cannot build a 32-bit program, you need to install 32-bit development libraries.])])
+    LD="${LD:-ld} -m elf32ppc"
+    AS="${AS:-as} -a32"
+    host_cpu="powerpc"
+    notice_platform="32-bit "
+    AC_SUBST(TARGETFLAGS,"-m32")
+    enable_win16=${enable_win16:-no}
   x86_64*)
     if test "x$enable_win64" != "xyes" -a "$cross_compiling" != "yes"
     then
-- 

Best Regards, André Hentschel