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dnl -*- Autoconf -*-
AC_DEFUN([RUBY_SHARED_GC],[
AC_ARG_WITH(shared-gc,
AS_HELP_STRING([--with-shared-gc=DIR],
[Enable replacement of Ruby's GC from a shared library in the specified directory.]),
[shared_gc_dir=$withval], [unset shared_gc_dir]
)
AS_IF([test "$shared_gc_dir" = yes], [
AC_MSG_ERROR(you must specify a directory when using --with-shared-gc)
])
AC_MSG_CHECKING([if building with shared GC support])
AS_IF([test x"$shared_gc_dir" != x], [
AC_MSG_RESULT([yes])
# Ensure that shared_gc_dir is always an absolute path so that Ruby
# never loads a shared GC from a relative path
AS_CASE(["$shared_gc_dir"],
[/*], [shared_gc_dir=$shared_gc_dir],
[shared_gc_dir=`pwd`/$shared_gc_dir]
)
# Ensure that shared_gc_dir always terminates with a /
AS_CASE(["$shared_gc_dir"],
[*/], [],
[shared_gc_dir="$shared_gc_dir/"]
)
AC_DEFINE([USE_SHARED_GC], [1])
AC_DEFINE_UNQUOTED([SHARED_GC_DIR], "$shared_gc_dir")
shared_gc_summary="yes (in $shared_gc_dir)"
], [
AC_MSG_RESULT([no])
AC_DEFINE([USE_SHARED_GC], [0])
shared_gc_summary="no"
])
AC_SUBST(shared_gc_dir, "${shared_gc_dir}")
])dnl
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