chiark - git - mdw - catacomb/blob - configure.ac

   1 dnl -*-autoconf-*-
   2 dnl
   3 dnl Configuration script for Catacomb
   4 dnl
   5 dnl (c) 2013 Straylight/Edgeware
   6 dnl
   7
   8 dnl----- Licensing notice ---------------------------------------------------
   9 dnl
  10 dnl This file is part of Catacomb.
  11 dnl
  12 dnl Catacomb is free software; you can redistribute it and/or modify
  13 dnl it under the terms of the GNU Library General Public License as
  14 dnl published by the Free Software Foundation; either version 2 of the
  15 dnl License, or (at your option) any later version.
  16 dnl
  17 dnl Catacomb is distributed in the hope that it will be useful,
  18 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 dnl GNU Library General Public License for more details.
  21 dnl
  22 dnl You should have received a copy of the GNU Library General Public
  23 dnl License along with Catacomb; if not, write to the Free
  24 dnl Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  25 dnl MA 02111-1307, USA.
  26
  27 dnl--------------------------------------------------------------------------
  28 dnl Initialization.
  29
  30 mdw_AUTO_VERSION
  31 AC_INIT([catacomb], AUTO_VERSION, [mdw@distorted.org.uk])
  32 AC_CONFIG_SRCDIR([catacomb.pc.in])
  33 AC_CONFIG_AUX_DIR([config])
  34 AM_INIT_AUTOMAKE([foreign parallel-tests color-tests subdir-objects])
  35 AC_CANONICAL_HOST
  36 mdw_SILENT_RULES
  37
  38 AC_PROG_CC
  39 AX_CFLAGS_WARN_ALL
  40 AM_PROG_LIBTOOL
  41 mdw_LIBTOOL_VERSION_INFO
  42
  43 AM_PROG_AS
  44
  45 AC_PROG_YACC
  46
  47 AC_SUBST(AM_CFLAGS)
  48
  49 dnl--------------------------------------------------------------------------
  50 dnl Define language support for assembler.
  51 dnl
  52 dnl This is stolen from https://gitlab.crest.iu.edu/jsfiroz/hpx/commit/
  53 dnl 84be4345db6eec3797a57b8e53483cb43f4733bf
  54
  55 AC_LANG_DEFINE([CPPAS], [cppas], [CPPAS], [CCAS], [C],
  56   [ac_ext=S ac_cpp='$CPP $CPPFLAGS'
  57    ac_compile='$CCAS -c $CCASFLAGS $CPPFLAGS dnl
  58         conftest.$ac_ext >&AS_MESSAGE_LOG_FD'
  59    ac_link='$CCAS -oconftest$ac_exeext $CCASFLAGS $CPPFLAGS $LDFLAGS dnl
  60         conftest.$ac_ext $LIBS >&AS_MESSAGE_LOG_FD'])
  61
  62 AC_DEFUN([AC_LANG_PREPROC(CPPAS)], [AC_REQUIRE([AC_PROG_CPP])])
  63 AC_DEFUN([AC_LANG_COMPILER(CPPAS)], [AC_REQUIRE([AM_PROG_AS])])
  64 AC_DEFUN([AC_LANG_CONFTEST(CPPAS)],
  65   [cat confdefs.h - <<_ACEOF >conftest.$ac_ext
  66 /* end confdefs.h. */
  67 $1
  68 _ACEOF])
  69
  70 AC_CACHE_CHECK(
  71   [whether the assembler is likely to work], [mdw_cv_gnuish_as],
  72   [AC_LANG_PUSH([CPPAS])
  73    AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
  74         .text
  75         .L\$_test = 23
  76 .macro  mymac
  77         .L\$_test = .L\$_test + 1
  78 .endm
  79         .globl  foo
  80         .extern bar
  81         mymac]])],
  82      [mdw_cv_gnuish_as=yes], [mdw_cv_gnuish_as=no])
  83    AC_LANG_POP([CPPAS])])
  84 AM_CONDITIONAL([GNUISH_AS], [test $mdw_cv_gnuish_as = yes])
  85
  86 dnl--------------------------------------------------------------------------
  87 dnl Host-specific configuration.
  88
  89 AC_MSG_CHECKING([CPU family and ABI])
  90
  91 dnl The table of CPU families and ABIs which we might support.  Support is
  92 dnl not uniform: each dispatched function might or might not have an
  93 dnl implementation for any particular CPU/ABI combination.
  94 AC_DEFUN([catacomb_CPU_FAMILIES],
  95   [$1([i[[3-6]]86,cygwin], [x86], [win])
  96    $1([i[[3-6]]86,*], [x86], [sysv])
  97    $1([x86_64,cygwin], [amd64], [win])
  98    $1([x86_64,*], [amd64], [sysv])
  99    $1([arm,*-gnueabi | arm,*-gnueabihf | dnl
 100         armv*,*-gnueabi | armv*,*-gnueabihf], [armel], [gnueabi])])
 101
 102 dnl A utility to clear the `seen' flags, used so as to process each CPU or
 103 dnl ABI once.
 104 m4_define([catacomb_CLEAR_FLAGS],
 105 [m4_ifdef([catacomb_seen_cpu/$2],
 106           [m4_undefine([catacomb_seen_cpu/$2])])dnl
 107 m4_ifdef([catacomb_seen_abi/$3],
 108           [m4_undefine([catacomb_seen_abi/$3])])])
 109
 110 dnl Identify the current host.
 111 if test $mdw_cv_gnuish_as = no; then
 112   CPUFAM=nil ABI=nil
 113 else
 114   case $host_cpu,$host_os in
 115     m4_define([catacomb_CPU_CASE],
 116       [$1) CPUFAM=$2 ABI=$3 ;;
 117 ])
 118     catacomb_CPU_FAMILIES([catacomb_CPU_CASE])
 119     *) CPUFAM=nil ABI=nil ;;
 120   esac
 121 fi
 122
 123 dnl Figure out the current CPU.
 124 catacomb_CPU_FAMILIES([catacomb_CLEAR_FLAGS])
 125 case $CPUFAM in
 126   m4_define([catacomb_DEFINE_CPU],
 127     [m4_ifdef([catacomb_seen_cpu/$2], [],
 128       [$2)
 129         AC_DEFINE([CPUFAM_]m4_translit([$2], [a-z], [A-Z]), [1],
 130                   [Define if host CPU family is \`$2\'.])
 131         ;;m4_define([catacomb_seen_cpu/$2], [t])])])
 132   catacomb_CPU_FAMILIES([catacomb_DEFINE_CPU])
 133   nil) ;;
 134   *) AC_MSG_ERROR([BUG: unexpected cpufam \`$CPUFAM']) ;;
 135 esac
 136 AC_SUBST([CPUFAM])
 137
 138 dnl Figure out the current ABI.
 139 catacomb_CPU_FAMILIES([catacomb_CLEAR_FLAGS])
 140 case $ABI in
 141   m4_define([catacomb_DEFINE_ABI],
 142     [m4_ifdef([catacomb_seen_abi/$3], [],
 143       [$3)
 144         AC_DEFINE([ABI_]m4_translit([$3], [a-z], [A-Z]), [1],
 145                   [Define if host ABI variant is \`$3\'.])
 146         ;;m4_define([catacomb_seen_abi/$3], [t])])])
 147   catacomb_CPU_FAMILIES([catacomb_DEFINE_ABI])
 148   nil) ;;
 149   *) AC_MSG_ERROR([BUG: unexpected ABI \`$ABI']) ;;
 150 esac
 151 AC_SUBST([ABI])
 152
 153 dnl Establish Automake conditions for things.
 154 catacomb_CPU_FAMILIES([catacomb_CLEAR_FLAGS])
 155 m4_define([catacomb_COND_CPU],
 156 [m4_define([_CPU], m4_translit([$2], [a-z], [A-Z]))
 157 m4_define([_ABI], m4_translit([$3], [a-z], [A-Z]))
 158 AM_CONDITIONAL([CPUABI_]_CPU[_]_ABI, [test x$CPUFAM/$ABI = x$2/$3])
 159 m4_ifdef([catacomb_seen_cpu/$2], [],
 160 [AM_CONDITIONAL([CPUFAM_]_CPU, [test x$CPUFAM = x$2])dnl
 161 m4_define([catacomb_seen_cpu/$2], [t])])
 162 m4_ifdef([catacomb_seen_abi/$3], [],
 163 [AM_CONDITIONAL([ABI_]_ABI, [test x$ABI = x$3])dnl
 164 m4_define([catacomb_seen_abi/$3], [t])])])
 165 catacomb_CPU_FAMILIES([catacomb_COND_CPU])
 166 AM_CONDITIONAL([KNOWN_CPUFAM], [test x$CPUFAM != xnil])
 167
 168 dnl Report on what we found.
 169 case $CPUFAM in
 170   nil) AC_MSG_RESULT([not supported]) ;;
 171   *) AC_MSG_RESULT([$CPUFAM/$ABI]) ;;
 172 esac
 173
 174 dnl--------------------------------------------------------------------------
 175 dnl CPU-specific assembler features.
 176
 177 AC_LANG([CPPAS])
 178
 179 case $CPUFAM in
 180   armel)
 181     AC_CACHE_CHECK(
 182       [whether the assembler understands ARMv8 crypto extensions],
 183       [mdw_cv_as_armv8_crypto],
 184       [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 185         .arch   armv8-a
 186         .fpu    crypto-neon-fp-armv8
 187
 188         .text
 189         .globl  foo
 190 foo:
 191         vldmia  r0, {d0-d3}
 192         aese.8  q0, q1
 193         aesmc.8 q0, q0
 194         vstmia  r0, {d0, d1}
 195         bx      r14]])],
 196          [mdw_cv_as_armv8_crypto=yes],
 197          [mdw_cv_as_armv8_crypto=no])])
 198     ;;
 199 esac
 200
 201 : ${mdw_cv_as_armv8_crypto=no}
 202 AM_CONDITIONAL([HAVE_AS_ARMV8_CRYPTO], [test $mdw_cv_as_armv8_crypto = yes])
 203 if test $mdw_cv_as_armv8_crypto = yes; then
 204   AC_DEFINE([HAVE_AS_ARMV8_CRYPTO], [1],
 205     [Define to 1 if your ARM assembler supports the ARMv8 crypto instructions.])
 206 fi
 207
 208 dnl--------------------------------------------------------------------------
 209 dnl C programming environment.
 210
 211 AC_LANG([C])
 212
 213 CATACOMB_LIBS=
 214
 215 dnl Find out if we're cross-compiling.
 216 AM_CONDITIONAL([CROSS_COMPILING], [test "$cross_compiling" = yes])
 217
 218 dnl Various standard types.
 219 AC_CHECK_TYPE([pid_t], [],
 220   [AC_DEFINE([pid_t], [int],
 221      [Define to `int' if <sys/types.h> does not define])])
 222 AC_TYPE_UID_T
 223 AC_CHECK_TYPE([ssize_t], [],
 224   [AC_DEFINE([ssize_t], [int],
 225      [Define to `int' if <sys/types.h> does not define])])
 226 AC_CHECK_TYPE([socklen_t], [],
 227   [AC_DEFINE([socklen_t], [int],
 228      [Define to `int' if <sys/socket.h> does not define])],
 229   [AC_INCLUDES_DEFAULT
 230 #include <sys/socket.h>
 231 ])
 232
 233 dnl The maths library.
 234 mdw_ORIG_LIBS=$LIBS LIBS=
 235 AC_SEARCH_LIBS([log], [m])
 236 AC_SEARCH_LIBS([sqrt], [m])
 237 AC_SUBST([MATHLIBS], [$LIBS])
 238 LIBS=$mdw_ORIG_LIBS
 239
 240 dnl Find out whether very long integer types are available.
 241 AC_CHECK_HEADERS([stdint.h])
 242 AC_SUBST([have_stdint_h])
 243 AX_C_LONG_LONG
 244
 245 dnl Some equipment wanted for checking CPU features at runtime.
 246 AC_CHECK_HEADERS([asm/hwcap.h])
 247 AC_CHECK_HEADERS([sys/auxv.h])
 248 AC_CHECK_HEADERS([linux/auxvec.h])
 249 AC_CHECK_FUNCS([getauxval])
 250
 251 dnl Find the bit lengths of the obvious integer types.  This will be useful
 252 dnl when deciding on a representation for multiprecision integers.
 253 type_bits="" type_bits_sep=""
 254 AC_DEFUN([catacomb_UINT_BITS],
 255   [mdw_UINT_BITS([$2], [$1])
 256    type_bits="$type_bits$type_bits_sep('$1', $[]$1_bits)"
 257    type_bits_sep=", "])
 258 catacomb_UINT_BITS([uchar], [unsigned char])
 259 catacomb_UINT_BITS([ushort], [unsigned short])
 260 catacomb_UINT_BITS([uint], [unsigned int])
 261 catacomb_UINT_BITS([ulong], [unsigned long])
 262 if test "$ac_cv_c_long_long" = "yes"; then
 263   catacomb_UINT_BITS([ullong], [unsigned long long])
 264 fi
 265 if test "$ac_cv_header_stdint_h" = "yes"; then
 266   catacomb_UINT_BITS([uintmax], [uintmax_t])
 267 fi
 268 AC_SUBST([type_bits])
 269
 270 dnl Determine the limits of common C integer types.
 271 limits="" limits_sep=""
 272 AC_DEFUN([catacomb_COMPILE_TIME_CONSTANT],
 273   [case "$2" in
 274      =*)
 275        $1="$2"; $1=${$1#=}
 276        ;;
 277      *)
 278        AC_CACHE_CHECK([compile-time value of $2], [mdw_cv_constant_$3],
 279                       [mdw_PROBE_CONSTANT([mdw_cv_constant_$3], [$2], [$4])])
 280        $1=$mdw_cv_constant_$3
 281        ;;
 282    esac])
 283 AC_DEFUN([catacomb_LIMIT],
 284 [catacomb_COMPILE_TIME_CONSTANT([lo], [$2], [$1_min],
 285 [#include <limits.h>
 286 #include <stddef.h>])
 287  catacomb_COMPILE_TIME_CONSTANT([hi], [$3], [$1_max],
 288 [#include <limits.h>
 289 #include <stddef.h>])
 290  limits="$limits$limits_sep('$1', $lo, $hi)" limits_sep=", "])
 291 catacomb_LIMIT([SCHAR],         [SCHAR_MIN],    [SCHAR_MAX])
 292 catacomb_LIMIT([CHAR],          [CHAR_MIN],     [CHAR_MAX])
 293 catacomb_LIMIT([UCHAR],         [=0],           [UCHAR_MAX])
 294 catacomb_LIMIT([UINT8],         [=0],           [=0xff])
 295 catacomb_LIMIT([SHRT],          [SHRT_MIN],     [SHRT_MAX])
 296 catacomb_LIMIT([USHRT],         [=0],           [USHRT_MAX])
 297 catacomb_LIMIT([UINT16],        [=0],           [=0xffff])
 298 catacomb_LIMIT([INT],           [INT_MIN],      [INT_MAX])
 299 catacomb_LIMIT([UINT],          [=0],           [UINT_MAX])
 300 catacomb_LIMIT([LONG],          [LONG_MIN],     [LONG_MAX])
 301 catacomb_LIMIT([ULONG],         [=0],           [ULONG_MAX])
 302 catacomb_LIMIT([UINT32],        [=0],           [=0xffffffff])
 303 if test "$ac_cv_c_long_long" = "yes"; then
 304   catacomb_LIMIT([LLONG],       [LLONG_MIN],    [LLONG_MAX])
 305   catacomb_LIMIT([ULLONG],      [=0],           [ULLONG_MAX])
 306 fi
 307 catacomb_LIMIT([SIZET],         [=0],           [~(size_t)0])
 308 AC_SUBST([limits])
 309
 310 dnl Figure out other aspects of the implementation's arithmetic.
 311 AC_CACHE_CHECK([whether negative numbers use two's complement],
 312         [catacomb_cv_neg_twoc],
 313 [AC_TRY_COMPILE(
 314 [#include <limits.h>],
 315 [int check[2*!!(-INT_MAX == INT_MIN + 1) - 1];],
 316 [catacomb_cv_neg_twoc=yes],
 317 [catacomb_cv_neg_twoc=no])])
 318 case $catacomb_cv_neg_twoc in
 319   yes)
 320     AC_DEFINE([NEG_TWOC], [1],
 321      [Define if signed numbers are represented in two's complement.])
 322     ;;
 323 esac
 324
 325 dnl Functions used for noise-gathering.
 326 AC_CHECK_FUNCS([setgroups])
 327 AC_CHECK_HEADERS([linux/random.h])
 328 mdw_ORIG_LIBS=$LIBS LIBS=$CATACOMB_LIBS
 329 AC_SEARCH_LIBS([clock_gettime], [rt])
 330 CATACOMB_LIBS=$LIBS LIBS=$mdw_ORIG_LIBS
 331 if test "$ac_cv_search_clock_gettime" != no; then
 332   AC_DEFINE([HAVE_CLOCK_GETTIME], [1],
 333             [Define if you have the \`clock_gettime' function.])
 334 fi
 335 AC_CHECK_FUNCS([getentropy])
 336 AC_CACHE_CHECK([whether the freewheel noise generator will work],
 337         [catacomb_cv_freewheel],
 338 [AC_TRY_LINK(
 339 [#include <setjmp.h>
 340 #include <sys/time.h>],
 341 [struct itimerval itv = { { 0, 0 }, { 0, 5000 } };
 342 jmp_buf j;
 343 setitimer(ITIMER_REAL, &itv, 0);
 344 sigsetjmp(j, 1);],
 345 [catacomb_cv_freewheel=yes],
 346 [catacomb_cv_freewheel=no])])
 347 case $catacomb_cv_freewheel in
 348   yes)
 349     AC_DEFINE([USE_FREEWHEEL], [1],
 350               [Define if you want to use the freewheel noise generator.])
 351     ;;
 352 esac
 353
 354 dnl Support for the passphrase pixie.
 355 mdw_ORIG_LIBS=$LIBS
 356 AC_SEARCH_LIBS([socket], [socket])
 357 AC_SUBST([PIXIE_LIBS], [$LIBS])
 358 LIBS=$mdw_ORIG_LIBS
 359
 360 dnl Memory locking support.
 361 AC_CHECK_FUNCS([mlock])
 362
 363 dnl Set the master libraries we need.
 364 AC_SUBST([CATACOMB_LIBS])
 365
 366 dnl Necessary support libraries.
 367 PKG_CHECK_MODULES([mLib], [mLib >= 2.2.2.1])
 368 AM_CFLAGS="$AM_CFLAGS $mLib_CFLAGS"
 369
 370 dnl--------------------------------------------------------------------------
 371 dnl Python.
 372
 373 dnl Make sure we have a suitable version.
 374 AM_PATH_PYTHON([2.5])
 375
 376 dnl--------------------------------------------------------------------------
 377 dnl Special debugging options.
 378
 379 AC_ARG_ENABLE([mpw],
 380   [AS_HELP_STRING([--enable-mpw], [force small-width mp digits])],
 381   [case "$enableval" in
 382     y*|t*|short)
 383       AC_DEFINE([FORCE_MPW_SHORT], [1],
 384                 [Define to force small-width mp digits.])
 385       ;;
 386     cussid)
 387       AC_DEFINE([FORCE_MPW_CUSSID], [1],
 388                 [Define to force strange-width mp digits.])
 389       ;;
 390    esac])
 391
 392 dnl--------------------------------------------------------------------------
 393 dnl Produce output.
 394
 395 AC_CONFIG_HEADER([config/config.h])
 396
 397 AC_CONFIG_FILES(
 398   [Makefile]
 399   [base/Makefile]
 400   [key/Makefile]
 401   [math/Makefile]
 402   [misc/Makefile]
 403   [pub/Makefile]
 404   [rand/Makefile]
 405   [symm/Makefile]
 406   [progs/Makefile])
 407 AC_OUTPUT
 408
 409 dnl----- That's all, folks --------------------------------------------------