AC_SUBST(OPT_FLAGS)
AC_SUBST(ARCH_FLAGS)
+dnl
+dnl Hacks to enable 32 or 64 bit build
+dnl
+AC_ARG_ENABLE(32-bit,
+ [AS_HELP_STRING([--enable-32-bit],
+ [build 32-bit libraries @<:@default=auto@:>@])],
+ enable_32bit="$enableval",
+ enable_32bit=auto
+)
+if test "x$enable_32bit" = xyes; then
+ if test "x$GCC" = xyes; then
+ CFLAGS="$CFLAGS -m32"
+ fi
+ if test "x$GXX" = xyes; then
+ CXXFLAGS="$CXXFLAGS -m32"
+ fi
+fi
+AC_ARG_ENABLE(64-bit,
+ [AS_HELP_STRING([--enable-64-bit],
+ [build 64-bit libraries @<:@default=auto@:>@])],
+ enable_64bit="$enableval",
+ enable_64bit=auto
+)
+if test "x$enable_64bit" = xyes; then
+ if test "x$GCC" = xyes; then
+ CFLAGS="$CFLAGS -m64"
+ fi
+ if test "x$GXX" = xyes; then
+ CXXFLAGS="$CXXFLAGS -m64"
+ fi
+fi
+
dnl
dnl shared/static libraries, mimic libtool options
dnl
one of these architectures is detected. This option ensures that
assembly will not be used.
</li>
+<li><code>--enable-32-bit, --enable-64-bit</code> - By default, the
+build will compile code as directed by the environment variables
+<code>CC</code>, <code>CFLAGS</code>, etc. If the compiler is
+<code>gcc</code>, these options offer a helper to add the compiler flags
+to force 32- or 64-bit code generation as used on the x86 and x86_64
+architectures.
+</li>
</ul>
</p>