#
# Copyright (c) 2019 Brent Cook
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

AC_INIT([rpki-client], m4_esyscmd([tr -d '\n' < VERSION]))

AC_CANONICAL_HOST
AM_INIT_AUTOMAKE([subdir-objects foreign])
AC_CONFIG_MACRO_DIR([m4])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
AC_PROG_CC([cc gcc])

case $host_os in
	*darwin*)
		HOST_OS=darwin
		AC_DEFINE([SPT_TYPE], [SPT_REUSEARGV])
		;;
	*freebsd*)
		HOST_OS=freebsd
		;;
	*linux*)
		HOST_OS=linux
		CFLAGS="$CFLAGS -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_GNU_SOURCE"
		AC_DEFINE([SPT_TYPE], [SPT_REUSEARGV])
		;;
	*netbsd*)
		HOST_OS=netbsd
		;;
	*openbsd*)
		HOST_OS=openbsd
		AC_DEFINE([HAVE_ATTRIBUTE__BOUNDED__], [1], [OpenBSD has __bounded__])
		AC_DEFINE([HAVE_ATTRIBUTE__DEAD], [1], [OpenBSD has __dead])
		;;
	*solaris*)
		HOST_OS=solaris
		CFLAGS="$CFLAGS -D__EXTENSIONS__ -D_XOPEN_SOURCE=600 -DBSD_COMP"
		;;
	*) ;;
esac

AM_CONDITIONAL([HOST_DARWIN],  [test x$HOST_OS = xdarwin])
AM_CONDITIONAL([HOST_FREEBSD], [test x$HOST_OS = xfreebsd])
AM_CONDITIONAL([HOST_LINUX],   [test x$HOST_OS = xlinux])
AM_CONDITIONAL([HOST_NETBSD],  [test x$HOST_OS = xnetbsd])
AM_CONDITIONAL([HOST_SOLARIS], [test x$HOST_OS = xsolaris])

AC_PROG_SED
AC_PROG_CC
AC_PROG_CC_STDC
AM_PROG_CC_C_O
AC_PROG_LIBTOOL

AC_ARG_ENABLE(warnings,
	AS_HELP_STRING([--disable-warnings],
	[ enable compiler warnings [default=enabled]]),
    [case $enableval in
	    yes) enable_warnings=yes;;
	    no) enable_warnings=no;;
	    *) enable_warnings=yes;; esac],
    enable_warnings=yes)

if test "$enable_warnings" = yes; then
	AM_CFLAGS="$AM_CFLAGS -Wall -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wshadow -Wpointer-arith -Wsign-compare -Werror-implicit-function-declaration"
	#AC_SUBST(AM_CFLAGS, ["-Wall -Wstrict-prototypes -Wmissing-prototypes -Wmissing-declarations -Wshadow -Wpointer-arith -Wsign-compare -Werror-implicit-function-declaration"])

	save_cflags="$CFLAGS"
	CFLAGS=-Wno-pointer-sign
	AC_MSG_CHECKING([whether CC supports -Wno-pointer-sign])
	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])],
	    [AC_MSG_RESULT([yes])]
	    [WARN_CFLAGS=-Wno-pointer-sign],
	    [AC_MSG_RESULT([no])]
	)
	AM_CFLAGS="$AM_CFLAGS $WARN_CFLAGS"
	CFLAGS="$save_cflags"
fi

AC_MSG_CHECKING([if compiling with clang])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[
#ifndef __clang__
	not clang
#endif
	]])],
	[AC_MSG_RESULT([yes])]
	[CLANG_FLAGS=-Qunused-arguments],
	[AC_MSG_RESULT([no])]
)
AM_CFLAGS="$AM_CFLAGS $CLANG_FLAGS"
AM_LDFLAGS="$LDFLAGS $CLANG_FLAGS"
AC_SUBST(AM_CFLAGS)
AC_SUBST(AM_LDFLAGS)

# check functions that are expected to be in libc
AC_CHECK_FUNCS([reallocarray recallocarray])
AC_CHECK_FUNCS([setgroups])
AC_CHECK_FUNCS([setregid setresgid setreuid setresuid])
AC_CHECK_FUNCS([explicit_bzero strlcat strlcpy])
AC_CHECK_FUNCS([pledge unveil])

# Share test results with automake
AC_SEARCH_LIBS([__b64_pton],[resolv])
AC_CHECK_FUNCS([__b64_pton])

AM_CONDITIONAL([HAVE_REALLOCARRAY], [test "x$ac_cv_func_reallocarray" = xyes])
AM_CONDITIONAL([HAVE_RECALLOCARRAY], [test "x$ac_cv_func_recallocarray" = xyes])
AM_CONDITIONAL([HAVE_SETGROUPS], [test "x$ac_cv_func_setgroups" = xyes])
AM_CONDITIONAL([HAVE_SETRESGID], [test "x$ac_cv_func_setresgid" = xyes])
AM_CONDITIONAL([HAVE_SETRESUID], [test "x$ac_cv_func_setresuid" = xyes])
AM_CONDITIONAL([HAVE_EXPLICIT_BZERO], [test "x$ac_cv_func_explicit_bzero" = xyes])
AM_CONDITIONAL([HAVE_STRLCAT], [test "x$ac_cv_func_strlcat" = xyes])
AM_CONDITIONAL([HAVE_STRLCPY], [test "x$ac_cv_func_strlcpy" = xyes])
AM_CONDITIONAL([HAVE_PLEDGE], [test "x$ac_cv_func_pledge" = xyes])
AM_CONDITIONAL([HAVE_UNVEIL], [test "x$ac_cv_func_unveil" = xyes])

AC_CHECK_HEADERS([err.h sha2.h])

AC_ARG_WITH([openssl],
	AS_HELP_STRING([--with-openssl=pkg-name],
		[Use pkg-config(1) pkg-name to find OpenSSL files]),
	PKG_NAME="$withval"
)
if test X"$PKG_NAME" != X; then
	OPENSSL_CFLAGS=`pkg-config --cflags-only-I $PKG_NAME 2>/dev/null`
	OPENSSL_LDFLAGS=`pkg-config --libs-only-L $PKG_NAME 2>/dev/null`
fi

AC_ARG_WITH([openssl-cflags],
	AS_HELP_STRING([--with-openssl-cflags=STRING],
		[Extra compiler flags to build with OpenSSL]),
	OPENSSL_CFLAGS="$withval"
)
AC_ARG_WITH([openssl-ldflags],
	AS_HELP_STRING([--with-openssl-ldflags=STRING],
		[Extra flags for linker to link with OpenSSL libraries]),
	OPENSSL_LDFLAGS="$withval"
)
AC_SUBST(OPENSSL_CFLAGS)
AC_SUBST(OPENSSL_LDFLAGS)

CFLAGS="$CFLAGS $OPENSSL_CFLAGS"
CPPFLAGS="$CPPFLAGS $OPENSSL_CFLAGS"
LDFLAGS="$LDFLAGS $OPENSSL_LDFLAGS"

AC_CHECK_HEADERS([openssl/cms.h openssl/err.h openssl/evp.h openssl/ssl.h openssl/x509.h openssl/x509v3.h], [], [AC_MSG_ERROR([OpenSSL headers required])])
AC_CHECK_LIB([crypto], [ASN1_STRING_get0_data], [], [AC_MSG_ERROR([OpenSSL libraries required])])
AC_CHECK_LIB([crypto], [X509_up_ref], [], [AC_MSG_ERROR([OpenSSL libraries required])])

AC_ARG_WITH([user],
	AS_HELP_STRING([--with-user=user],
		[User for rpki-client to use when run as root]),
	RPKI_USER="$withval",
	RPKI_USER="_rpki-client"
)
AC_DEFINE_UNQUOTED(RPKI_CLIENT_USER, "$RPKI_USER", [Unprivileged user])
AC_SUBST(RPKI_USER)

AC_ARG_WITH([rsync],
	AS_HELP_STRING([--with-rsync=command],
		[Rsync command to use]),
	RSYNC="$withval"
)
if test X"$RSYNC" = X; then
	AC_CHECK_PROGS([RSYNC], [openrsync rsync])
fi
if test X"$RSYNC" = X; then
   AC_MSG_ERROR([No rsync binary found in $PATH])
fi
AC_DEFINE_UNQUOTED(RPKI_RSYNC_CMD, "$RSYNC", [Rsync command])

AC_ARG_WITH([tal-dir],
	AS_HELP_STRING([--with-tal-dir=path],
		[Path to the default TAL directory]),
	RPKI_TAL_DIR="$withval",
	RPKI_TAL_DIR="$sysconfdir/rpki"
)
AC_SUBST(RPKI_TAL_DIR)

AC_ARG_WITH([base-dir],
	AS_HELP_STRING([--with-base-dir=path],
		[Location to store the RPKI cache repository]),
	RPKI_BASE_DIR="$withval",
	RPKI_BASE_DIR="$localstatedir/cache/rpki-client"
)
AC_SUBST(RPKI_BASE_DIR)

AC_ARG_WITH([output-dir],
	AS_HELP_STRING([--with-output-dir=path],
		[Path to the default output directory]),
	RPKI_OUT_DIR="$withval",
	RPKI_OUT_DIR="$localstatedir/db/rpki-client"
)
AC_SUBST(RPKI_OUT_DIR)

AC_CONFIG_FILES([
	Makefile
	include/Makefile
	compat/Makefile
	src/Makefile
])

AC_OUTPUT