AC_PREREQ([2.69])
AC_INIT([cryb.to], [0.20221002], [des@des.no], [cryb-to], [http://cryb.to/])
AC_CONFIG_SRCDIR([include/cryb/core.h])
AC_CONFIG_MACRO_DIR([m4])
AM_INIT_AUTOMAKE([foreign no-dist-gzip dist-xz])
AC_CONFIG_HEADERS([include/config.h])
AM_MAINTAINER_MODE([enable])

############################################################################
#
# Toolchain
#

# C compiler and features
AC_LANG(C)
AC_PROG_CC([clang gcc cc])
AC_PROG_CPP
AC_PROG_CXX([clang++ g++ c++])
AC_USE_SYSTEM_EXTENSIONS
AC_C_CONST
AC_C_RESTRICT
AC_C_VOLATILE
AC_C_BIGENDIAN

# libtool
LT_PREREQ([2.2.6])
LT_INIT()

# pkg-config
AX_PROG_PKG_CONFIG

# other programs
AC_PROG_INSTALL

############################################################################
#
# Types
#
AC_TYPE_INT16_T
AC_TYPE_INT32_T
AC_TYPE_INT8_T
AC_TYPE_INTMAX_T
AC_TYPE_INTPTR_T
AC_TYPE_OFF_T
AC_TYPE_SIZE_T
AC_TYPE_SSIZE_T
AC_TYPE_UINT16_T
AC_TYPE_UINT32_T
AC_TYPE_UINT8_T
AC_TYPE_UINTMAX_T
AC_TYPE_UINTPTR_T

AC_CHECK_TYPES([errno_t], [], [], [[#include <errno.h>]])
AC_CHECK_TYPES([rsize_t], [], [], [[#include <stdint.h>]])
AC_CHECK_DECL([RSIZE_MAX], [], [], [[#include <stdint.h>]])

############################################################################
#
# Headers and functions
#

AC_CHECK_HEADERS([endian.h sys/endian.h strings.h])
AX_GCC_BUILTIN([__builtin_bswap16])
AX_GCC_BUILTIN([__builtin_bswap32])
AX_GCC_BUILTIN([__builtin_bswap64])
AX_GCC_BUILTIN([__builtin_clz])
AX_GCC_BUILTIN([__builtin_clzl])
AX_GCC_BUILTIN([__builtin_clzll])
AX_GCC_BUILTIN([__builtin_ctz])
AX_GCC_BUILTIN([__builtin_ctzl])
AX_GCC_BUILTIN([__builtin_ctzll])
AX_GCC_BUILTIN([__builtin_ffs])
AX_GCC_BUILTIN([__builtin_ffsl])
AX_GCC_BUILTIN([__builtin_ffsll])
# No compiler we know of has these
#AX_GCC_BUILTIN([__builtin_fls])
#AX_GCC_BUILTIN([__builtin_flsl])
#AX_GCC_BUILTIN([__builtin_flsll])
AC_CHECK_DECLS([
    bswap16, bswap32, bswap64,
    bswap16v, bswap32v, bswap64v,
    be16enc, be16dec, le16enc, le16dec,
    be16encv, be16decv, le16encv, le16decv,
    be32enc, be32dec, le32enc, le32dec,
    be32encv, be32decv, le32encv, le32decv,
    be64enc, be64dec, le64enc, le64dec,
    be64encv, be64decv, le64encv, le64decv,
    htobe16, be16toh, htole16, le16toh,
    htobe32, be32toh, htole32, le32toh,
    htobe64, be64toh, htole64, le64toh,
    [a thumb war]
], [], [], [[
#if HAVE_SYS_ENDIAN_H
#include <sys/endian.h>
#endif
#if HAVE_ENDIAN_H
#include <endian.h>
#endif
]])
AC_CHECK_FUNCS([ffs ffsl ffsll fls flsl flsll], [], [], [[
#if HAVE_STRINGS_H
#include <strings.h>
#endif
]])
AC_CHECK_FUNCS([strchrnul strlcat strlcmp strlcpy])
AC_CHECK_FUNCS([wcschrnul wcslcat wcslcmp wcslcpy])

# For tracing allocations in unit tests
AC_CHECK_HEADERS([sys/uio.h sys/ktrace.h], [], [], [[
#include <sys/param.h>
#if HAVE_SYS_UIO_H
#include <sys/uio.h>
#endif
]])
AC_CHECK_FUNCS([utrace])

# Used in some unit tests
AC_CHECK_HEADERS([sys/resource.h])
AC_CHECK_FUNCS([setrlimit])

# C11 features
AC_CHECK_FUNCS([memcpy_s memset_s])

############################################################################
#
# Extra libraries
#

save_LIBS="${LIBS}"
LIBS=""
AC_SEARCH_LIBS([clock_gettime], [rt])
RT_LIBS="${LIBS}"
LIBS="${save_LIBS}"
AC_SUBST(RT_LIBS)

############################################################################
#
# Build options
#

# Documentation
AC_ARG_ENABLE([doc],
    AS_HELP_STRING([--disable-doc],
	[do not build the documentation]),
    [with_doc=$enableval])
AM_CONDITIONAL([WITH_DOC], [test x"$with_doc" != x"no"])

############################################################################
#
# Debugging
#

# OpenSSL versions of the unit tests for comparison
AC_ARG_ENABLE([openssl-tests],
    AS_HELP_STRING([--enable-openssl-tests],
	[build unit tests with OpenSSL support]))
AM_CONDITIONAL([OPENSSL_TESTS], [test x"$enable_openssl_tests" = x"yes"])

# RSAREF versions of the unit tests for comparison
AC_ARG_ENABLE([rsaref-tests],
    AS_HELP_STRING([--enable-rsaref-tests],
	[build unit tests enable RSAREF support]))
AM_CONDITIONAL([RSAREF_TESTS], [test x"enable_rsaref_tests" = x"yes"])

XFLAGS=""

# Developer-friendly compiler flags
AC_ARG_ENABLE([developer-warnings],
    AS_HELP_STRING([--enable-developer-warnings],
	[enable strict warnings (default is NO)]),
    [XFLAGS="${XFLAGS} -Wall -Wextra -Wcast-qual -Wshadow"])
AC_ARG_ENABLE([debugging-symbols],
    AS_HELP_STRING([--enable-debugging-symbols],
	[enable debugging symbols (default is NO)]),
    [XFLAGS="${XFLAGS} -O0 -fno-inline -g"])
AC_ARG_ENABLE([werror],
    AS_HELP_STRING([--enable-werror],
	[use -Werror (default is NO)]),
    [XFLAGS="${XFLAGS} -Werror"])

CFLAGS="${CFLAGS} ${XFLAGS}"
CXXFLAGS="${CXXFLAGS} ${XFLAGS}"
unset XFLAGS

############################################################################
#
# Components
#

CRYB_I_AM

CRYB_LIB_PROVIDE([cipher],	[core])
CRYB_LIB_PROVIDE([core],	[])
CRYB_LIB_PROVIDE([cpe],		[core])
CRYB_LIB_PROVIDE([digest],	[core])
CRYB_LIB_PROVIDE([enc],		[core])
CRYB_LIB_PROVIDE([hash],	[core])
CRYB_LIB_PROVIDE([mac],		[core digest])
CRYB_LIB_PROVIDE([mpi],		[core])
CRYB_LIB_PROVIDE([oath],	[core digest enc mac rand])
CRYB_LIB_PROVIDE([rand],	[core])
CRYB_LIB_PROVIDE([test],	[core])

CRYB_LIB_REQUIRE([test])

CRYB_RESOLVE

############################################################################
#
# Output
#

AC_CONFIG_FILES([
    Makefile
    include/Makefile
    include/cryb/Makefile
    lib/Makefile
    lib/cipher/Makefile
    lib/cipher/cryb-cipher.pc
    lib/core/Makefile
    lib/core/cryb-core.pc
    lib/cpe/Makefile
    lib/cpe/cryb-cpe.pc
    lib/digest/Makefile
    lib/digest/cryb-digest.pc
    lib/enc/Makefile
    lib/enc/cryb-enc.pc
    lib/hash/Makefile
    lib/hash/cryb-hash.pc
    lib/mac/Makefile
    lib/mac/cryb-mac.pc
    lib/mpi/Makefile
    lib/mpi/cryb-mpi.pc
    lib/oath/Makefile
    lib/oath/cryb-oath.pc
    lib/rand/Makefile
    lib/rand/cryb-rand.pc
    lib/rsaref/Makefile
    lib/test/Makefile
    lib/test/cryb-test.pc
    t/Makefile
    freebsd/Makefile
])
AC_CONFIG_FILES([tools/coverage.sh], [chmod +x tools/coverage.sh])
AC_OUTPUT

CRYB_SUMMARY