AC_PREREQ([2.61])
AC_INIT([stoken], [0.92], [cernekee@gmail.com], [stoken], [http://stoken.sf.net/])
AC_CONFIG_AUX_DIR([build-aux])
AM_INIT_AUTOMAKE([1.11 parallel-tests])
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_MACRO_DIR([m4])
AC_USE_SYSTEM_EXTENSIONS
AC_PROG_LIBTOOL
AC_GNU_SOURCE
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

LT_INIT([win32-dll])

# Upstream's pkg.m4 (since 0.27) offers this now, but define our own
# compatible version in case the local version of pkgconfig isn't new enough.
# https://bugs.freedesktop.org/show_bug.cgi?id=48743
m4_ifdef([PKG_INSTALLDIR], [PKG_INSTALLDIR],
	  [AC_ARG_WITH([pkgconfigdir],
		       [AS_HELP_STRING([--with-pkgconfigdir],
		       [install directory for stoken.pc pkg-config file])],
			[],[with_pkgconfigdir='$(libdir)/pkgconfig'])
	   AC_SUBST([pkgconfigdir], [${with_pkgconfigdir}])])

: ${CFLAGS=""}

AC_PROG_CC
AM_PROG_CC_C_O
AC_CONFIG_FILES([Makefile])

# --enable-debug

AC_ARG_ENABLE(
	[debug],
	[AS_HELP_STRING([--enable-debug],[enable debugging code and output [default=no]])],
	[enable_debug=$enableval],
	[enable_debug="no"]
)

if test "x$enable_debug" = xyes; then
	CFLAGS="$CFLAGS -O0 -ggdb -fno-inline"
fi

# --enable-valgrind

AC_ARG_ENABLE([valgrind], [AS_HELP_STRING([--enable-valgrind],
	[use valgrind when running 'make check' [default=no]])],
	[enable_valgrind=$enableval],
	[enable_valgrind=no])

AM_CONDITIONAL([ENABLE_VALGRIND], [test $enable_valgrind != no])

EXTRA_PC_LIBS=""

AS_COMPILER_FLAGS(WFLAGS,
        "-Wall
         -Wextra
         -Wno-missing-field-initializers
         -Wno-sign-compare
         -Wno-pointer-sign
         -Wno-unused-parameter
         -Wno-unused-const-variable
         -Werror=pointer-to-int-cast
         -Wdeclaration-after-statement
         -Werror-implicit-function-declaration
         -Wformat-security
         -Winit-self
         -Wno-missing-declarations
         -Wmissing-include-dirs
         -Wnested-externs
         -Wpointer-arith
         -Wwrite-strings")
AC_SUBST(WFLAGS, [$WFLAGS])

# mlockall() is missing on Bionic (Android)
AC_CHECK_FUNCS([mlockall])

# mkstemps is missing on uClibc
AC_CHECK_FUNCS([mkstemps])

# TODO: see if compatibility functions are needed to build on Darwin
AC_CHECK_FUNCS([strcasestr asprintf])

# time functions are slightly different on Windows
AC_CHECK_FUNCS([gmtime_r timegm])

# gtk / stoken-gui

AC_ARG_WITH([gtk], [AS_HELP_STRING([--with-gtk],
	[build stoken-gui for gtk+ @<:@default=check@:>@])],
	[],
	[with_gtk=check])

PKG_PROG_PKG_CONFIG
if test "x$PKG_CONFIG" = x; then
	if test "x$with_gtk" = xyes; then
		AC_MSG_FAILURE([--with-gtk requires pkg-config])
	fi
	with_gtk=no
fi

enable_gui=no
AS_IF([test "x$with_gtk" != xno],
	[PKG_CHECK_MODULES([GTK], [gtk+-3.0],
		[enable_gui=yes],
		[if test "x$with_gtk" != xcheck; then
			AC_MSG_FAILURE(
				[--with-gtk was given, but test for gtk failed])
		 fi
		])
	]
)

if test $enable_gui = yes; then
	AC_MSG_CHECKING([if gtk+ is usable])

	saved_LIBS="$LIBS"
	saved_CFLAGS="$CFLAGS"
	LIBS="$LIBS $GTK_LIBS"
	CFLAGS="$CFLAGS $GTK_CFLAGS"

	AC_TRY_LINK([#include <gtk/gtk.h>
		     #include <stdlib.h>],
		[gtk_init(NULL,NULL);],
		[AC_MSG_RESULT([yes])],
		[AC_MSG_FAILURE([unable to link gtk+ test program])])
	LIBS="$saved_LIBS"
	CFLAGS="$saved_CFLAGS"
fi

AM_CONDITIONAL([ENABLE_GUI], [test $enable_gui = yes])

# libxml2 support for sdtid file parsing

PKG_CHECK_MODULES([LIBXML2], [libxml-2.0])

# crypto library (prefer tomcrypt if unspecified)

AC_ARG_WITH([tomcrypt], [AS_HELP_STRING([--with-tomcrypt],
	[use libtomcrypt for crypto @<:@default=check@:>@])],
	[with_tomcrypt=$withval],
	[with_tomcrypt=check])

AC_ARG_WITH([nettle], [AS_HELP_STRING([--with-nettle],
	[use nettle for crypto @<:@default=check@:>@])],
	[with_nettle=$withval],
	[with_nettle=check])

CRYPTO_BACKEND=""
if test "$with_tomcrypt" != no -a "$with_nettle" != yes; then
	# libtomcrypt
	# Some distributions add a libtomcrypt.pc file, but it isn't in the
	# upstream libtomcrypt distribution so we can't count on it.
	tomcrypt_pkg=no

	if test "x$PKG_CONFIG" != x; then
		PKG_CHECK_EXISTS([libtomcrypt], [tomcrypt_pkg=yes], [])
	fi

	if test $tomcrypt_pkg = no; then
		AC_SUBST(TOMCRYPT_LIBS, [-ltomcrypt])
		AC_SUBST(DEPS_PC, [])
		TOMCRYPT_PC_LIBS="-ltomcrypt"
	else
		AC_SUBST(DEPS_PC, [libtomcrypt])
		PKG_CHECK_MODULES([TOMCRYPT], libtomcrypt)
		TOMCRYPT_PC_LIBS=
	fi

	CRYPTO_LIBS="$TOMCRYPT_LIBS"
	CRYPTO_CFLAGS="-DLTM_DESC"

	saved_LIBS="$LIBS"
	saved_CFLAGS="$CFLAGS"
	LIBS="$LIBS $CRYPTO_LIBS"
	CFLAGS="$CFLAGS $CRYPTO_CFLAGS"

	AC_MSG_CHECKING([if libtomcrypt is usable])
	AC_TRY_LINK([#include <tomcrypt.h>
		     #include <stdlib.h>],
		[rijndael_ecb_encrypt(NULL,NULL,NULL);
		 ltc_mp = ltm_desc;
		 register_hash(&sha1_desc);],
		[AC_MSG_RESULT([yes])
		 CRYPTO_BACKEND="tomcrypt"
		 EXTRA_PC_LIBS="$EXTRA_PC_LIBS $TOMCRYPT_PC_LIBS"],
		[AC_MSG_RESULT([no])])

	AC_MSG_CHECKING([whether libtomcrypt uses newer LTC_PKCS_1_V1_5 naming convention])
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <tomcrypt.h>],
		[int padding = LTC_PKCS_1_V1_5;])],
		[AC_MSG_RESULT([yes])],
		[AC_MSG_RESULT([no])
		 AC_DEFINE([LIBTOMCRYPT_OLD_PKCS_NAMES], [1],
			   [libtomcrypt uses the pre-1.18 PKCS #1 constant naming convention])])

	LIBS="$saved_LIBS"
	CFLAGS="$saved_CFLAGS"
fi

if test -z "$CRYPTO_BACKEND" -a "$with_nettle" != no -a "$with_tomcrypt" != yes; then
	PKG_CHECK_MODULES(NETTLE, [nettle >= 2.4])
	PKG_CHECK_MODULES(HOGWEED, [hogweed >= 2.4])
	deps="nettle, hogweed"
	AC_SUBST(DEPS_PC, [$deps])

	CRYPTO_CFLAGS="$NETTLE_CFLAGS $HOGWEED_CFLAGS"
	# gmp is added since we directly use GMP functions
	# unfortunately it doesn't show up in pkg-config
	CRYPTO_LIBS="$NETTLE_LIBS $HOGWEED_LIBS -lgmp"
	CRYPTO_BACKEND="nettle"

	# nettle 2.x accepts a bidirectional (unsigned *) argument
	# nettle 3.x accepts a (size_t *) output-only argument
	saved_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS -Werror"
	AC_MSG_CHECKING([nettle base64 API version])
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <nettle/base64.h>
					    #include <stdlib.h>],
		[base64_decode_update(NULL, (size_t *)NULL, NULL, 0, NULL);])],
		AC_MSG_RESULT([3.0+]),
		[AC_MSG_RESULT([2.x])
		 AC_DEFINE([NETTLE_OLD_BASE64_API], [1],
			   [nettle uses the pre-3.x base64 API])])
	CFLAGS="$saved_CFLAGS"
fi

if test -z "$CRYPTO_BACKEND"; then
	AC_MSG_ERROR([Cannot find a suitable crypto library])
fi

AC_SUBST(EXTRA_PC_LIBS, [$EXTRA_PC_LIBS])
AC_SUBST(CRYPTO_CFLAGS, [$CRYPTO_CFLAGS])
AC_SUBST(CRYPTO_LIBS, [$CRYPTO_LIBS])
AC_SUBST(CRYPTO_BACKEND, [$CRYPTO_BACKEND])

# JNI

AC_ARG_WITH([java],
	AS_HELP_STRING([--with-java(=DIR)],
		       [Build JNI bindings using jni.h from DIR [default=no]]),
	[], [with_java=no])

if test "$with_java" = "yes"; then
	AX_JNI_INCLUDE_DIR
	for JNI_INCLUDE_DIR in $JNI_INCLUDE_DIRS; do
		  JNI_CFLAGS="$JNI_CFLAGS -I$JNI_INCLUDE_DIR"
	done
elif test "$with_java" = "no"; then
	JNI_CFLAGS=""
else
	JNI_CFLAGS="-I$with_java"
fi

if test "x$JNI_CFLAGS" != "x"; then
	oldCFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS $JNI_CFLAGS"
	AC_MSG_CHECKING([jni.h usability])
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <jni.h>],
		[jint foo = 0; (void)foo;])],
		AC_MSG_RESULT([yes]),
		[AC_MSG_RESULT([no])
		 AC_MSG_ERROR([unable to compile JNI test program])])
	CFLAGS="$oldCFLAGS"

	AC_SUBST(JNI_CFLAGS, [$JNI_CFLAGS])
fi

AM_CONDITIONAL(USE_JNI, [test "$JNI_CFLAGS" != ""])

AC_ARG_ENABLE([jni-standalone],
	AS_HELP_STRING([--enable-jni-standalone],
		       [build JNI stubs directly into libstoken.so [default=no]]),
	[jni_standalone=$enableval],
	[jni_standalone=no])
AM_CONDITIONAL(JNI_STANDALONE, [test $jni_standalone = yes])

# library version

AX_CHECK_VSCRIPT

libhdr=${srcdir}/src/stoken.h
APIMAJOR="`awk '/#define STOKEN_API_VER_MAJOR/ {print $3}' ${libhdr}`"
APIMINOR="`awk '/#define STOKEN_API_VER_MINOR/ {print $3}' ${libhdr}`"
AC_SUBST(APIMAJOR)
AC_SUBST(APIMINOR)

AC_CONFIG_FILES(stoken.pc)
AC_OUTPUT