AC_INIT([libpsl], [0.20.1], [tim.ruehsen@gmx.de], [libpsl], [https://github.com/rockdaboot/libpsl])
AC_PREREQ([2.59])
AC_CONFIG_AUX_DIR([build-aux])
AM_INIT_AUTOMAKE([1.10 no-define foreign])

# Generate two configuration headers; one for building the library itself with
# an autogenerated template, and a second one that will be installed alongside
# the library.
AC_CONFIG_HEADERS([config.h])
AC_PROG_CC
m4_ifdef([AM_PROG_AR], [AM_PROG_AR])
#LT_INIT([disable-static])
LT_INIT([win32-dll])
AC_CONFIG_MACRO_DIR([m4])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

dnl Check that compiler understands inline
AC_C_INLINE

dnl Check for visibility support
gl_VISIBILITY

#
# Generate version defines for include file
#
AC_SUBST([LIBPSL_VERSION_MAJOR], [`echo $VERSION|cut -d'.' -f1`])
AC_SUBST([LIBPSL_VERSION_MINOR], [`echo $VERSION|cut -d'.' -f2`])
AC_SUBST([LIBPSL_VERSION_PATCH], [`echo $VERSION|cut -d'.' -f3`])
AC_SUBST([LIBPSL_VERSION_NUMBER], [`printf '0x%02x%02x%02x' $LIBPSL_VERSION_MAJOR $LIBPSL_VERSION_MINOR $LIBPSL_VERSION_PATCH`])
AC_CONFIG_FILES([include/libpsl.h])

#
# Gettext
#
AM_GNU_GETTEXT([external],[need-ngettext])
AM_GNU_GETTEXT_VERSION([0.18.1])

#
# check for gtk-doc
#
m4_ifdef([GTK_DOC_CHECK], [
GTK_DOC_CHECK([1.15],[--flavour no-tmpl])
],[
AM_CONDITIONAL([ENABLE_GTK_DOC], false)
])
# needed for some older versions of gtk-doc
m4_ifdef([GTK_DOC_USE_LIBTOOL], [], [
AM_CONDITIONAL([GTK_DOC_USE_LIBTOOL], false)
])

if test x"$have_gtk_doc" = xyes -a x"$enable_gtk_doc" = xyes; then
  AC_SUBST([LIBPSL_DOCS], [docs/libpsl])
fi

#
# enable creation of man pages
#
enable_man=no
AC_ARG_ENABLE([man],
  [AC_HELP_STRING([--enable-man], [generate man pages [default=auto]])],
  [
    if test "$enableval" = yes; then
      enable_man=yes
      AC_PATH_PROG([XSLTPROC], [xsltproc])
      AS_IF([test -z "$XSLTPROC"], [
        AC_MSG_ERROR([xsltproc is required for --enable-man])
        enable_man="no (xsltproc not found)"
      ])
    fi
  ])
AM_CONDITIONAL(ENABLE_MAN, test x$enable_man = xyes)

# src/psl-make-dafsa needs python 2.7+
AM_PATH_PYTHON([2.7])

PKG_PROG_PKG_CONFIG

cfi=no
AC_ARG_ENABLE([cfi],
  [AS_HELP_STRING([--enable-cfi], [Turn on clang's Control Flow Integrity (CFI)])],
  [
    if test "$enableval" = yes; then
      cfi=yes
      CFLAGS=$CFLAGS" -B/usr/bin/gold -fsanitize=cfi -flto -fvisibility=default -fno-sanitize-trap=all"
      AC_LINK_IFELSE([
        AC_LANG_PROGRAM([], [])
      ], [], [
        AC_MSG_ERROR([clang 3.7+ and the 'gold' linker are required for --enable-cfi])
      ])
    fi
  ])

ubsan=no
AC_ARG_ENABLE([ubsan],
  [AS_HELP_STRING([--enable-ubsan], [Turn on Undefined Behavior Sanitizer (UBSan)])],
  [
    if test "$enableval" = yes; then
      ubsan=yes
      CFLAGS=$CFLAGS" -fsanitize=undefined -fno-sanitize-recover=undefined"
    fi
  ])

asan=no
AC_ARG_ENABLE([asan],
  [AS_HELP_STRING([--enable-asan], [Turn on Address Sanitizer (ASan)])],
  [
    if test "$enableval" = yes; then
      asan=yes
      CFLAGS=$CFLAGS" -fsanitize=address -fno-omit-frame-pointer"
      AX_CHECK_COMPILE_FLAG([-fsanitize-address-use-after-scope], [CFLAGS="$CFLAGS -fsanitize-address-use-after-scope"])
    fi
  ])

# Define these substitions here to keep all version information in one place.
# For information on how to properly maintain the library version information,
# refer to the libtool manual, section "Updating library version information":
# https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
#
# 1. Start with version information of ‘0:0:0’ for each libtool library.
# 2. Update the version information only immediately before a public release of your software. More frequent updates are unnecessary, and only guarantee that the current interface number gets larger faster.
# 3. If the library source code has changed at all since the last update, then increment revision (‘c:r:a’ becomes ‘c:r+1:a’).
# 4. If any interfaces have been added, removed, or changed since the last update, increment current, and set revision to 0.
# 5. If any interfaces have been added since the last public release, then increment age.
# 6. If any existing interfaces have been removed or changed since the last public release, then set age to 0. 
AC_SUBST([LIBPSL_SO_VERSION], [8:0:3])
AC_SUBST([LIBPSL_VERSION], $VERSION)

# Check for enable/disable builtin PSL data
AC_ARG_ENABLE(runtime,
  [
  --enable-runtime[[=IDNA library]]
      Specify the IDNA library used for libpsl run-time conversions:
        libidn2 [[default]]: IDNA2008 library (also needs libunistring)
        libicu:            IDNA2008 UTS#46 library
        libidn:            IDNA2003 library (also needs libunistring)
  --disable-runtime        Do not link runtime IDNA functionality
  ], [
    if test "$enableval" = "libidn2" -o "$enableval" = "yes"; then
      enable_runtime=libidn2
      AC_DEFINE([WITH_LIBIDN2], [1], [generate PSL data using libidn2])
    elif test "$enableval" = "libicu"; then
      enable_runtime=libicu
      AC_DEFINE([WITH_LIBICU], [1], [generate PSL data using libicu])
    elif test "$enableval" = "libidn"; then
      enable_runtime=libidn
      AC_DEFINE([WITH_LIBIDN], [1], [generate PSL data using libidn])
    elif test "$enableval" = "no"; then
      enable_runtime=no
    else
      AC_MSG_ERROR([Unknown value $enableval for --enable-runtime])
    fi
  ], [
    # this is the default if neither --enable-runtime nor --disable-runtime were specified
    enable_runtime=auto
  ])

# Check for enable/disable builtin PSL data
AC_ARG_ENABLE(builtin,
  [
  --enable-builtin[[=IDNA library]]
      Specify the IDNA library used for built-in data generation:
        libidn2 [[default]]: IDNA2008 library (also needs libunistring)
        libicu: IDNA2008   UTS#46 library
        libidn:            IDNA2003 library (also needs libunistring)
  --disable-builtin        Do not generate built-in PSL data
  ], [
    if test "$enableval" = "libidn2" -o "$enableval" = "yes"; then
      enable_builtin=libidn2
      AC_DEFINE([BUILTIN_GENERATOR_LIBIDN2], [1], [generate PSL data using libidn2])
    elif test "$enableval" = "libicu"; then
      enable_builtin=libicu
      AC_DEFINE([BUILTIN_GENERATOR_LIBICU], [1], [generate PSL data using libicu])
    elif test "$enableval" = "libidn"; then
      enable_builtin=libidn
      AC_DEFINE([BUILTIN_GENERATOR_LIBIDN], [1], [generate PSL data using libidn])
    elif test "$enableval" = "no"; then
      enable_builtin=no
    else
      AC_MSG_ERROR(Unknown value $enableval)
    fi
  ], [
    # this is the default if neither --enable-builtin nor --disable-builtin were specified
    enable_builtin=auto
  ])

if test "$enable_runtime" = "libidn2" -o "$enable_builtin" = "libidn2" -o "$enable_runtime" = "auto" -o "$enable_builtin" = "auto"; then
  # Check for libidn2
  PKG_CHECK_MODULES([LIBIDN2], [libidn2], [
    HAVE_LIBIDN2=yes
    if test "$enable_runtime" = "libidn2"; then
      CFLAGS="$LIBIDN2_CFLAGS $CFLAGS"
    fi
  ], [
    OLDLIBS=$LIBS
    AC_SEARCH_LIBS(idn2_lookup_u8, idn2, HAVE_LIBIDN2=yes,
    [
       if test "$enable_runtime" = "libidn2" -o "$enable_builtin" = "libidn2"; then
          AC_MSG_ERROR(You requested libidn2 but it is not installed.)
       fi
    ], -lunistring)
    LIBS=$OLDLIBS
  ])

  if test "x$HAVE_LIBIDN2" = "xyes"; then
    if test "$enable_runtime" = "auto"; then
      enable_runtime=libidn2
      AC_DEFINE([WITH_LIBIDN2], [1], [generate PSL data using libidn2])
    fi
    if test "$enable_builtin" = "auto"; then
      enable_builtin=libidn2
      AC_DEFINE([BUILTIN_GENERATOR_LIBIDN2], [1], [generate PSL data using libidn2])
    fi
  fi
fi

if test "$enable_runtime" = "libicu" -o "$enable_builtin" = "libicu" -o "$enable_runtime" = "auto" -o "$enable_builtin" = "auto"; then
  # Check for libicu
  # using pkg-config won't work on older systems like Ubuntu 12.04 LTS Server Edition 64bit
  # using AC_SEARCH_LIBS also don't work since functions have the library version appended
  PKG_CHECK_MODULES([LIBICU], [icu-uc], [
    HAVE_LIBICU=yes
    if test "$enable_runtime" = "libicu"; then
      CFLAGS="$LIBICU_CFLAGS $CFLAGS"
    fi
  ], [
    OLDLIBS=$LIBS
    LIBS="-licuuc $LIBS"
    AC_MSG_CHECKING([for ICU unicode library])
    AC_LINK_IFELSE(
      [AC_LANG_PROGRAM(
        [[#include <unicode/ustring.h>]],
        [[u_strToUTF8(NULL, 0, NULL, NULL, 0, NULL);]])],
      [HAVE_LIBICU=yes; LIBICU_LIBS="-licuuc"; AC_MSG_RESULT([yes])],
      [ AC_MSG_RESULT([no]);
        if test "$enable_runtime" = "libicu" -o "$enable_builtin" = "libicu"; then
          AC_MSG_ERROR(You requested libicu but it is not installed.)
        fi
      ])
    LIBS=$OLDLIBS
  ])

  if test "x$HAVE_LIBICU" = "xyes"; then
    if test "$enable_runtime" = "auto"; then
      enable_runtime=libicu
      AC_DEFINE([BUILTIN_GENERATOR_LIBICU], [1], [generate PSL data using libicu])
    fi
    if test "$enable_builtin" = "auto"; then
      enable_builtin=libicu
      AC_DEFINE([BUILTIN_GENERATOR_LIBICU], [1], [generate PSL data using libicu])
    fi
  fi
fi

if test "$enable_runtime" = "libidn" -o "$enable_builtin" = "libidn" -o "$enable_runtime" = "auto" -o "$enable_builtin" = "auto"; then
  # Check for libidn
  PKG_CHECK_MODULES([LIBIDN], [libidn], [
    HAVE_LIBIDN=yes
    if test "$enable_runtime" = "libidn"; then
      CFLAGS="$LIBIDN_CFLAGS $CFLAGS"
    fi
  ], [
    OLDLIBS=$LIBS
    AC_SEARCH_LIBS(idna_to_ascii_8z, idn, HAVE_LIBIDN=yes,
    [
      if test "$enable_runtime" = "libidn" -o "$enable_builtin" = "libidn"; then
        AC_MSG_ERROR(You requested libidn but it is not installed.)
      fi
    ])
    LIBS=$OLDLIBS
  ])

  if test "x$HAVE_LIBIDN" = "xyes"; then
    if test "$enable_runtime" = "auto"; then
      enable_runtime=libidn
      AC_DEFINE([WITH_LIBIDN], [1], [generate PSL data using libidn])
    fi
    if test "$enable_builtin" = "auto"; then
      enable_builtin=libidn
      AC_DEFINE([WITH_LIBIDN], [1], [generate PSL data using libidn])
    fi
  fi
fi

# last fallback is noruntime/nobuiltin
if test "$enable_runtime" = "auto"; then
  enable_runtime=no
fi
if test "$enable_builtin" = "auto"; then
  enable_builtin=no
fi

if test "x$HAVE_LIBIDN2" = "xyes" -o "x$HAVE_LIBIDN" = "xyes"; then
  # Check for libunistring, we need it for psl_str_to_utf8lower()
  OLDLIBS=$LIBS
  AC_SEARCH_LIBS(u8_tolower, unistring, HAVE_UNISTRING=yes, AC_MSG_ERROR(You requested libidn2|libidn but libunistring is not installed.))
  LIBS=$OLDLIBS
fi

# AM_ICONV sets @LIBICONV@ and @LTLIBICONV@ for use in Makefile.am
# do not use AM_ICONV conditionally
AM_ICONV

AM_CONDITIONAL([WITH_LIBICU], test "x$enable_runtime" = "xlibicu")
AM_CONDITIONAL([WITH_LIBIDN2], test "x$enable_runtime" = "xlibidn2")
AM_CONDITIONAL([WITH_LIBIDN], test "x$enable_runtime" = "xlibidn")
AM_CONDITIONAL([BUILTIN_GENERATOR_LIBICU], test "x$enable_builtin" = "xlibicu")
AM_CONDITIONAL([BUILTIN_GENERATOR_LIBIDN2], test "x$enable_builtin" = "xlibidn2")
AM_CONDITIONAL([BUILTIN_GENERATOR_LIBIDN], test "x$enable_builtin" = "xlibidn")
AM_CONDITIONAL([WITH_BUILTIN], test $enable_builtin = yes)

# Solaris has socket in libsocket and inet_ntop in libnsl, but also needs libsocket, so the order is important here
AC_CHECK_LIB([socket], [socket], [NEEDS_SOCKET=yes], [])
if test -n "$NEEDS_SOCKET" ; then
  AC_CHECK_LIB([nsl], [inet_ntop], [NEEDS_NSL=yes], [])
fi
if test -n "$NEEDS_SOCKET" && test -n "$NEEDS_NSL" ; then
  LIBS="$LIBS -lsocket -lnsl"
elif test -n "$NEEDS_SOCKET" ; then
  LIBS="$LIBS -lsocket"
elif test -n "$NEEDS_NSL" ; then
  LIBS="$LIBS -lnsl"
else
  # Needed for MinGW / Windows
  AC_SEARCH_LIBS(inet_pton, ws2_32)
fi

# Check for clock_gettime() used for performance measurement
AC_SEARCH_LIBS(clock_gettime, rt)

# Check for valgrind
ac_enable_valgrind=no
AC_ARG_ENABLE(valgrind-tests,
  AS_HELP_STRING([--enable-valgrind-tests], [enable using Valgrind for tests]),
  [ac_enable_valgrind=$enableval],
  [ac_enable_valgrind=no])

if test "${ac_enable_valgrind}" = "yes" ; then
  AC_CHECK_PROG(HAVE_VALGRIND, valgrind, yes, no)
  if test "$HAVE_VALGRIND" = "yes" ; then
    VALGRIND_ENVIRONMENT="valgrind --error-exitcode=1 --leak-check=yes --show-reachable=yes --track-origins=yes"
    AC_SUBST(VALGRIND_ENVIRONMENT)
    TESTS_INFO="Test suite will be run under Valgrind"
  else
    TESTS_INFO="Valgrind not found"
  fi
else
  TESTS_INFO="Valgrind testing not enabled"
fi

# Check for distribution-wide PSL file
AC_ARG_WITH(psl-distfile,
  AC_HELP_STRING([--with-psl-distfile=[PATH]], [path to distribution-wide PSL file]),
  PSL_DISTFILE=$withval AC_SUBST(PSL_DISTFILE))

# Check for custom PSL file
AC_ARG_WITH(psl-file,
  AC_HELP_STRING([--with-psl-file=[PATH]], [path to PSL file]),
  PSL_FILE=$withval,
  PSL_FILE="\$(top_srcdir)/list/public_suffix_list.dat")
AC_SUBST(PSL_FILE)

# Check for custom PSL test file
AC_ARG_WITH(psl-testfile,
  AC_HELP_STRING([--with-psl-testfile=[PATH]], [path to PSL test file]),
  PSL_TESTFILE=$withval,
  PSL_TESTFILE="\$(top_srcdir)/list/tests/tests.txt")
AC_SUBST(PSL_TESTFILE)

# check for alloca / alloca.h
AC_FUNC_ALLOCA
AC_CHECK_FUNCS([strndup clock_gettime fmemopen nl_langinfo])

# Override the template file name of the generated .pc file, so that there
# is no need to rename the template file when the API version changes.
AC_CONFIG_FILES([Makefile
                 include/Makefile
                 src/Makefile
                 tools/Makefile
                 po/Makefile.in
                 fuzz/Makefile
                 tests/Makefile
                 docs/libpsl/Makefile docs/libpsl/version.xml
                 libpsl.pc:libpsl.pc.in])
AC_OUTPUT

AC_MSG_NOTICE([Summary of build options:

  Version:           ${PACKAGE_VERSION}
  Host OS:           ${host_os}
  Install prefix:    ${prefix}
  Compiler:          ${CC}
  CFlags:            ${CFLAGS} ${CPPFLAGS}
  LDFlags:           ${LDFLAGS}
  Libs:              ${LIBS}
  Runtime:           ${enable_runtime}
  Builtin:           ${enable_builtin}
  PSL Dist File:     ${PSL_DISTFILE}
  PSL File:          ${PSL_FILE}
  PSL Test File:     ${PSL_TESTFILE}
  Sanitizers:        UBSan $ubsan, ASan $asan, CFI $cfi
  Docs:              $enable_gtk_doc
  Man pages:         $enable_man
  Tests:             ${TESTS_INFO}
])