configure.ac

AC_INIT([outliertree], 1.8.1)
AC_LANG(C++)
AC_COMPILE_IFELSE(
    [AC_LANG_PROGRAM([[]], [[double *__restrict x;]])],
    [SUPPORTS_RESTRICT="-DSUPPORTS_RESTRICT=1"],
    [SUPPORTS_RESTRICT=""]
)
AC_SUBST(SUPPORTS_RESTRICT)

AC_LANG(C++)
OLD_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS -fno-math-errno"
AC_COMPILE_IFELSE(
    [AC_LANG_PROGRAM([[]])],
    [FNE_FLAG="-fno-math-errno"],
    [FNE_FLAG=""]
)
CXXFLAGS="$OLD_CXXFLAGS"
AC_SUBST(FNE_FLAG)

OLD_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS -fno-trapping-math"
AC_COMPILE_IFELSE(
    [AC_LANG_PROGRAM([[]])],
    [FNTP_FLAG="-fno-trapping-math"],
    [FNTP_FLAG=""]
)
CXXFLAGS="$OLD_CXXFLAGS"
AC_SUBST(FNTP_FLAG)

AC_CONFIG_FILES([src/Makevars])
AC_OUTPUT