Added case to FP_LEADING_UNDERSCORE macro for darwin platform.
alpha-dec-osf*) fptools_cv_leading_underscore=no;;
*cygwin32) fptools_cv_leading_underscore=yes;;
*mingw32) fptools_cv_leading_underscore=yes;;
alpha-dec-osf*) fptools_cv_leading_underscore=no;;
*cygwin32) fptools_cv_leading_underscore=yes;;
*mingw32) fptools_cv_leading_underscore=yes;;
+*darwin) fptools_cv_leading_underscore=yes;;
*) AC_TRY_RUN([#ifdef HAVE_NLIST_H
#include <nlist.h>
struct nlist xYzzY1[] = {{"xYzzY1", 0},{0}};
*) AC_TRY_RUN([#ifdef HAVE_NLIST_H
#include <nlist.h>
struct nlist xYzzY1[] = {{"xYzzY1", 0},{0}};