#                                               -*- Autoconf -*-
# Process this file with autoconf to produce a configure script.

AC_PREREQ([2.68])
AC_INIT(ffts, 0.7, amb@anthonix.com)
AM_INIT_AUTOMAKE(ffts, 0.7)

# AC_CONFIG_SRCDIR([include/common.h])
AC_CONFIG_HEADERS([config.h])

# Checks for programs.
AC_PROG_CXX
AC_PROG_CC
#AX_COMPILER_VENDOR
LT_INIT([disable-shared])
AM_PROG_AS
#CXX="clang++"
#CXXFLAGS="$CXXFLAGS -stdlib=libc++"

#SFFT_AR="/usr/bin/ar"
#SFFT_CFLAGS="$CFLAGS"
#SFFT_CC="$CC"
AC_ARG_ENABLE(dynamic-code, [AC_HELP_STRING([--enable-dynamic-code],[dynamically generate code])], sfft_dynamic=$enableval, sfft_dynamic=yes)
if test "$sfft_dynamic" = "no"; then
	AC_DEFINE(DYNAMIC_DISABLED,1,[Define to disable dynamic code generation.])
fi
AM_CONDITIONAL(DYNAMIC_DISABLED, test "$sfft_dynamic" = "no")

AC_ARG_ENABLE(single, [AC_HELP_STRING([--enable-single],[compile single-precision library])], sfft_single=$enableval, sfft_single=no)
if test "$sfft_single" = "yes"; then
	AC_DEFINE(FFTS_PREC_SINGLE,1,[Define to FFT in single precision.])
fi
if test "$sfft_single" = "no"; then
	AC_DEFINE(FFTS_PREC_SINGLE,0,[Define to FFT in single precision.])
fi

AC_ARG_ENABLE(sse, [AC_HELP_STRING([--enable-sse],[enable SSE extensions])], have_sse=$enableval, have_sse=yes)
if test "$have_sse" = "yes"; then
	SIMD=sse
fi
AM_CONDITIONAL(HAVE_SSE, test "$have_sse" = "yes")

AC_ARG_ENABLE(neon, [AC_HELP_STRING([--enable-neon],[enable NEON extensions])], have_neon=$enableval, have_neon=no)
if test "$have_neon" = "yes"; then
	if test "$SIMD" != "sse"; then
		AC_MSG_ERROR([conflicting SIMD extensisons specified])
	fi
	AC_DEFINE(HAVE_NEON,1,[Define to FFT with ARM NEON.])
fi
AM_CONDITIONAL(HAVE_NEON, test "$have_neon" = "yes")

#AC_CANONICAL_HOST
AC_MSG_NOTICE([host is "${host}"])
case "${host}" in
	arm* )
		CFLAGS="$CFLAGS -mfloat-abi=softfp -mfpu=neon -std=c99"
		CCASFLAGS="$CCASFLAGS -mfloat-abi=softfp -mfpu=neon "
		;;
	*)
		;;
esac
#if test "$ord_sr" = "no"; then
#	AC_DEFINE(SFFT_ORD_SR,0,[Define to enable ordinary split radix.])
#fi

# Checks for libraries.
# FIXME: Replace `main' with a function in `-lm':
AC_CHECK_LIB([m], [main])

# Checks for header files.
AC_CHECK_HEADERS([stdint.h stdlib.h string.h sys/socket.h sys/time.h unistd.h])

# Checks for typedefs, structures, and compiler characteristics.
AC_HEADER_STDBOOL
AC_C_INLINE
AC_TYPE_INT32_T
AC_C_RESTRICT
AC_TYPE_SIZE_T
AC_TYPE_UINT64_T
AC_PROG_CC_STDC
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_LIBTOOL

# Checks for library functions.
#AC_FUNC_MALLOC
AC_CHECK_FUNCS([gettimeofday pow])


AC_CONFIG_FILES([Makefile
                 src/Makefile
                 tests/Makefile
								 ffts.pc
                 ])
AC_OUTPUT