dnl -------------------------------------------------------------------------
dnl Autoconf startup.
dnl -------------------------------------------------------------------------

AC_PREREQ([2.63])
AC_INIT([dateutils], [0.4.3], [https://github.com/hroptatyr/dateutils/issues])
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_HEADER([src/config.h])
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_SRCDIR([src/])

dnl -------------------------------------------------------------------------
dnl Local copyright notices.
dnl -------------------------------------------------------------------------

AC_COPYRIGHT([dnl
#### Configuration script for dateutils and friends.
#### Copyright (C) 2011-2018 Sebastian Freundt

### Don't edit this script!
### This script was automatically generated by the `autoconf' program
### from the file `./configure.ac'.
### To rebuild it, execute the command
###     autoreconf
])

AM_INIT_AUTOMAKE([foreign dist-xz color-tests parallel-tests subdir-objects])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

## the build chain
AC_PROG_CC([icc gcc tcc cc])
SXE_CHECK_CC([gnu11 c11 gnu1x c1x gnu99 c99])
AC_C_BIGENDIAN
SXE_CHECK_CFLAGS

## check/generate version files
AX_YUCK_SCMVER([version.mk])
AC_CONFIG_LINKS([GNUmakefile:GNUmakefile])

## check for clitosis helper
AX_CHECK_CLITOSIS

## check for byteorder utils
AC_CHECK_HEADERS([endian.h sys/endian.h machine/endian.h byteorder.h])
AC_CHECK_HEADERS([byteswap.h])
AC_CHECK_HEADERS([sys/param.h])
AC_CHECK_HEADERS([sys/types.h])

## to make lintian happy
AC_SYS_LARGEFILE

## check for mmap and friends
SXE_CHECK_MMAP

## for getline()/fgetln() code (e.g. tzmap.c)
AC_CHECK_FUNCS([getline])
AC_CHECK_FUNCS([fgetln])

## AIX' take on stdint
AC_CHECK_HEADERS([sys/stdint.h])

## check for tzfile.h
AX_ZONEINFO([right])
AM_CONDITIONAL([ZONEINFO_UTC_RIGHT], [test -n "${ax_cv_zoneinfo_utc_right}"])

## check for strptime
AC_CHECK_FUNCS([strptime])
have_strptime="${ac_cv_func_strptime}"
AM_CONDITIONAL([HAVE_STRPTIME], [test "${have_strptime}" = "yes"])

## check for working c1x features
SXE_CHECK_ANON_STRUCTS_DECL
SXE_CHECK_ANON_STRUCTS_INIT
SXE_CHECK_SLOPPY_STRUCTS_INIT

if test "${sxe_cv_have_anon_structs_decl}" != "yes"; then
	AC_MSG_ERROR([C compiler unusable

dateutils make extensive use of c11 anonymous structs/unions but your
compiler does not fully support them.
Change either the CFLAGS or the compiler.
Good day.
])
fi


AM_PROG_LEX
AC_PROG_YACC

AC_PATH_PROG([GPERF], [gperf])
if test -z "${GPERF}"; then
	GPERF="gperf"
fi
AC_ARG_VAR([GPERF], [full path to the gperf tool])


## check if we've got curl, necessary to d/l the tzmaps
AC_PATH_PROG([CURL], [curl])
AC_ARG_VAR([CURL], [full path to the curl tool])
AM_CONDITIONAL([HAVE_CURL], [test -n "${CURL}"])

AC_ARG_ENABLE([tzmap-fetch], [
AS_HELP_STRING([--enable-tzmap-fetch], [Fetch tzmaps from github, default: no.])],
        [dnl
		enable_tzmap_fetch="${enableval}"
                if test -z "${CURL}"; then
                        enable_tzmap_fetch="no"
                fi
        ], [enable_tzmap_fetch="no"])
AM_CONDITIONAL([FETCH_TZMAPS], [test "${enable_tzmap_fetch}" = "yes"])
AM_CONDITIONAL([HAVE_TZMAPS],
	[test `find "${srcdir}/lib" -name '*.tzmap' -print | wc -l` -gt 0])


AC_PATH_PROG([GDATE], [date])
AC_ARG_VAR([GDATE], [full path to the date tool])
if test -n "${GDATE}"; then
	## try and use -d
	AC_MSG_CHECKING([if date is of GNU flavour])
	if "${GDATE}" -d "2012-01-01" >/dev/null 2>/dev/null; then
		have_gdate="yes"
	else
		have_gdate="no"
	fi
	AC_MSG_RESULT([${have_gdate}])
fi
if test -n "${GDATE}" -a "${have_gdate}" = "yes"; then
	## try and use -d with a big year
	AC_MSG_CHECKING([if date is immune to year 2038 problem])
	if "${GDATE}" -d "4095-01-01" >/dev/null 2>/dev/null; then
		have_gdate_2039="yes"
	else
		have_gdate_2039="no"
	fi
	AC_MSG_RESULT([${have_gdate_2039}])
fi
AC_ARG_VAR([have_gdate], [yes if GDATE is of GNU flavour])
AC_ARG_VAR([have_gdate_2039], [yes if GDATE can handle years beyond 2038])
AM_CONDITIONAL([HAVE_GDATE], [test "${have_gdate}" = "yes"])
AM_CONDITIONAL([HAVE_GDATE_2039], [test "${have_gdate_2039}" = "yes"])


AC_ARG_ENABLE([fast-arith],
	[AS_HELP_STRING([--enable-fast-arith], [
Whether to enable fast date handling and arithmetic routines at the cost
of strictness.  For instance the leap year rule used is incorrect for
years before 1901 and after 2100, or every month can have a 31st to
denote the last day of the month.])
AS_HELP_STRING([], [Default: disabled])],
	[enable_fast_arith="${enableval}"], [enable_fast_arith="no"])

AC_ARG_ENABLE([contrib], [
AS_HELP_STRING([--enable-contrib], [Build contribs, default: no.])],
        [enable_contrib="${enableval}"], [enable_contrib="no"])
AM_CONDITIONAL([WITH_CONTRIB], [test "${enable_contrib}" != "no"])

AC_ARG_WITH([old-names], [
AS_HELP_STRING([--with-old-names], [Install old binary names only, default: no.])],
        [with_old_names="${withval}"], [with_old_names="no"])
AM_CONDITIONAL([WITH_OLD_NAMES], [test "${with_old_names}" != "no"])

AC_ARG_WITH([old-links], [
AS_HELP_STRING([--with-old-links], [Install compatibility symlinks, default: yes.])],
	[with_old_links="${withval}"], [with_old_links="yes"])
AM_CONDITIONAL([WITH_OLD_LINKS], [test "${with_old_links}" != "no"])

## checks
if test "${enable_fast_arith}" = "yes"; then
	AC_DEFINE([WITH_FAST_ARITH], [1],
		[whether to use fast but incorrect date routines])
fi

## always define this one for now
AC_DEFINE([WITH_LEAP_SECONDS], [1], [Whether to use leap-second aware routines])
AM_CONDITIONAL([WITH_LEAP_SECONDS], [test "1" = "1"])

## trivial conditional so that the dexpr scanner and parser are built
AM_CONDITIONAL([BUILD_DEXPR], [test "0" = "1"])

AM_CONDITIONAL([BUILD_LTRCC], [test ! -f "${srcdir}/lib/leapseconds.def"])


## check for contrib stuff
if test "${enable_contrib}" != "no"; then
	## check for matlab, then octave
	SXE_CHECK_MATLAB
	SXE_CHECK_OCTAVE
fi
AM_CONDITIONAL([BUILD_MEXCLI], [test "${sxe_cv_matlab_mex_h}" = "yes" -a -n "${MATLABPATH}"])
AM_CONDITIONAL([BUILD_OCTCLI], [test "${sxe_cv_octave_mex_h}" = "yes" -a -n "${OCTAVEPATH}"])


## prepare the summary page
if test "${with_old_names}" = "no"; then
	dut_apps="dateadd dateconv datediff dategrep dateround dateseq datesort datetest datezone"
else
	dut_apps="dadd dconv ddiff dgrep dround dseq dsort dtest dzone"
fi
if test "${have_strptime}" = "yes"; then
	misc_apps="strptime"
else
	misc_apps="none"
fi
if test "${enable_contrib}" != "no"; then
	if test "${sxe_cv_matlab_mex_h}" = "yes"; then
		cntrb_apps="${cntrb_apps}${cntrb_apps:+ }tzconv.m(atlab)"
	fi
	if test "${sxe_cv_octave_mex_h}" = "yes"; then
		cntrb_apps="${cntrb_apps}${cntrb_apps:+ }tzconv.m(octave)"
	fi
else
	cntrb_apps="none"
fi

AX_CHECK_YUCK

dnl must come after all AC_LINK_IFELSE clauses
## check for the ldflags
SXE_CHECK_LDFLAGS
LT_INIT
SXE_CHECK_LIBTOOL

AC_CONFIG_FILES([Makefile])
AC_CONFIG_FILES([build-aux/Makefile])
AC_CONFIG_FILES([data/Makefile])
AC_CONFIG_FILES([lib/Makefile])
AC_CONFIG_FILES([src/Makefile])
AC_CONFIG_FILES([info/Makefile])
AC_CONFIG_FILES([test/Makefile])
AC_CONFIG_FILES([contrib/Makefile])
AC_OUTPUT

cat <<EOF


Build summary
=============
Build date/time apps:	${dut_apps}
Build misc apps:	${misc_apps}
Build contrib apps:	${cntrb_apps}

EOF

if test "${with_old_names}" = "no"; then
	cat <<EOF
New binary names will be used (compatibility symlinks: $with_old_links).
See configure options --with-old-names and --with-old-links.
EOF
else
	echo "Old binary names will be used."
fi

dnl configure.ac ends here