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

AC_PREREQ([2.68])
AC_INIT([cfa-cc],[1.0.0.0],[cforall@plg.uwaterloo.ca])
AC_CONFIG_AUX_DIR([automake])
AC_CONFIG_MACRO_DIRS([automake])
AM_SILENT_RULES([yes])

m4_include([../automake/cfa.m4])

AM_INIT_AUTOMAKE([subdir-objects])

# don't use the default CFLAGS as they unconditonnaly add -O2
: ${CFLAGS=""}

# define this to override
AR_FLAGS="cr"

# Allow program name tansformation
# will fill program_transform_name with appropriate sed regex
AC_ARG_PROGRAM

AC_ARG_VAR(ARCHITECTURE,  [The architecture  to use when building libcfa])
AC_ARG_VAR(CONFIGURATION, [The configuration to use when building libcfa, options are: deubg, nodebug, nolib (prelude-only)])
AC_ARG_VAR(DRIVER_DIR, [The path to the cforall driver directory])
AC_ARG_VAR(CFA_VERSION, [The long version of cfa])

AC_ARG_ENABLE(distcc,
	[  --enable-distcc     whether or not to enable distributed compilation],
	enable_distcc=$enableval, enable_distcc=no)

echo -n "checking for distributated build... "
if test x$enable_distcc = xno; then
	CFACC=${DRIVER_DIR}cfa
	echo "no"
else
	tools="$(readlink -m $ac_confdir/)/../tools/build"
	config=$(basename $(readlink -f .))
	echo "$tools/distcc_hash $config"
	CFADIR_HASH=$($tools/distcc_hash $config)
	CFACC="distcc ~/.cfadistcc/${CFADIR_HASH}/cfa"
	echo "yes (hash=${CFADIR_HASH})"
fi
CFACPP=${DRIVER_DIR}cfa-cpp
LOCAL_CFACC=${DRIVER_DIR}cfa
LOCAL_CC1=${DRIVER_DIR}cc1

AM_CONDITIONAL([ENABLE_DISTCC], [test x$enable_distcc = xyes])

AC_SUBST(CFACC)
AC_SUBST(CFACPP)
AC_SUBST(LOCAL_CFACC)
AC_SUBST(LOCAL_CC1)
AC_SUBST(CFADIR_HASH)
AC_SUBST(CFA_VERSION)

#==============================================================================
#Handle specific flags
case $ARCHITECTURE in
	"x64"        ) ARCH_FLAGS="-m64";;
	"x86"        ) ARCH_FLAGS="-m32";;
	"arm"        ) ARCH_FLAGS="";;
esac

AC_SUBST(ARCH_FLAGS)

case $CONFIGURATION in
	"debug"   )
		CONFIG_CFLAGS="-O0 -g"
		CONFIG_CFAFLAGS="-debug"
		CONFIG_BUILDLIB="yes"
	;;
	"nodebug" )
		CONFIG_CFLAGS="-O3 -s"
		CONFIG_CFAFLAGS="-nodebug"
		CONFIG_BUILDLIB="yes"
	;;
	"nolib"   )
		CONFIG_CFLAGS="-O3 -s"
		CONFIG_CFAFLAGS="-nolib"
		CONFIG_BUILDLIB="no"
	;;
	"profile" )
		CONFIG_CFLAGS="-O3 -g -fno-omit-frame-pointer"
		CONFIG_CFAFLAGS="-nodebug"
		CONFIG_BUILDLIB="yes"
	;;
	*)
	AC_MSG_ERROR('Invalid value $CONFIGURATION for \$CONFIGURATION')
	;;
esac

CONFIG_CFAFLAGS="${CONFIG_CFAFLAGS} ${CFAFLAGS}"

AC_SUBST(CONFIG_CFLAGS)
AC_SUBST(CONFIG_CFAFLAGS)
AC_SUBST(CONFIG_BUILDLIB)

AM_CONDITIONAL([BUILDLIB], [test "x${CONFIG_BUILDLIB}" = "xyes"])

#==============================================================================
#Trasforming cc1 will break compilation
M4CFA_PROGRAM_NAME

#==============================================================================
# Installation paths
M4CFA_PARSE_PREFIX

# Checks for programs.
LT_INIT([disable-static])

AC_PROG_CXX
AC_PROG_CC
AM_PROG_AS
AC_PROG_LIBTOOL
AC_PROG_INSTALL
AC_PROG_MAKE_SET

AC_CHECK_HEADERS([linux/io_uring.h])
AC_CHECK_FUNCS([preadv2 pwritev2])

AC_CONFIG_FILES([
	Makefile
	src/Makefile
	prelude/Makefile
	])

AC_CONFIG_HEADERS(prelude/defines.hfa)

AC_OUTPUT()

# Final text
AC_MSG_RESULT(Cforall library configuraton completed. Type "make -j 8 install".)