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configure.ac
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configure.ac
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AC_INIT([isotree], 0.6.0)
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)
OLD_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS -std=c++17"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[]])],
[CXX_SUPPORTED="CXX17"],
[CXX_SUPPORTED="CXX11"]
)
CXXFLAGS="$OLD_CXXFLAGS"
if test "$CXX_SUPPORTED" = "CXX11"; then
OLD_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS -std=gnu++14"
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([[]])],
[CXX_SUPPORTED="CXX14"],
[CXX_SUPPORTED="CXX11"]
)
CXXFLAGS="$OLD_CXXFLAGS"
fi
AC_SUBST(CXX_SUPPORTED)
LD_SUPPORT=""
if test -n "${NO_LONG_DOUBLE}"; then
LD_SUPPORT="-DNO_LONG_DOUBLE"
fi
if test "$LD_SUPPORT" = ""; then
if test `${R_HOME}/bin${R_ARCH_BIN}/Rscript -e "cat(unname(as.integer(capabilities('long.double'))))"` = "0"; then
LD_SUPPORT="-DNO_LONG_DOUBLE"
fi
fi
AC_SUBST(LD_SUPPORT)
AC_CONFIG_FILES([src/Makevars])
AC_OUTPUT