chiark / gitweb /
vars.am: Experimental hack for Emacs `flymake'.
[catacomb] / 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 dnl--------------------------------------------------------------------------
71 dnl Host-specific configuration.
72
73 dnl The table of CPU families and ABIs which we might support.  Support is
74 dnl not uniform: each dispatched function might or might not have an
75 dnl implementation for any particular CPU/ABI combination.
76 AC_DEFUN([catacomb_CPU_FAMILIES],
77   [$1([i[[3-6]]86,cygwin], [x86], [win])
78    $1([i[[3-6]]86,*], [x86], [sysv])
79    $1([x86_64,cygwin], [amd64], [win])
80    $1([x86_64,*], [amd64], [sysv])
81    $1([arm,*-gnueabi | arm,*-gnueabihf | dnl
82         armv*,*-gnueabi | armv*,*-gnueabihf], [armel], [gnueabi])])
83
84 dnl A utility to clear the `seen' flags, used so as to process each CPU or
85 dnl ABI once.
86 m4_define([catacomb_CLEAR_FLAGS],
87 [m4_ifdef([catacomb_seen_cpu/$2],
88           [m4_undefine([catacomb_seen_cpu/$2])])dnl
89 m4_ifdef([catacomb_seen_abi/$3],
90           [m4_undefine([catacomb_seen_abi/$3])])])
91
92 dnl Identify the current host.
93 case $host_cpu,$host_os in
94   m4_define([catacomb_CPU_CASE],
95     [$1) CPUFAM=$2 ABI=$3 ;;
96 ])
97   catacomb_CPU_FAMILIES([catacomb_CPU_CASE])
98   *) CPUFAM=nil ABI=nil ;;
99 esac
100
101 dnl Now check the assembler.  We have target-specific requirements here, so
102 dnl we couldn't do this any earlier.
103 AC_CACHE_CHECK(
104   [whether the assembler is likely to work], [mdw_cv_gnuish_as],
105   [AC_LANG_PUSH([CPPAS])
106    AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
107         .text
108         .L\$_test = 23
109 .macro  mymac
110         .L\$_test = .L\$_test + 1
111 .endm
112         .globl  foo
113         .extern bar
114         mymac]])],
115      [mdw_cv_gnuish_as=yes], [mdw_cv_gnuish_as=no])
116    case $CPUFAM in
117      x86 | amd64)
118        AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
119         .text
120         .arch pentium4
121         .intel_syntax noprefix
122         .globl  foo
123 foo:
124         adcd    var, 0
125         ret
126         .data
127 var:    .long   1
128         ]])],
129          [:], [mdw_cv_gnuish_as=no])
130        ;;
131    esac
132    AC_LANG_POP([CPPAS])])
133 AM_CONDITIONAL([GNUISH_AS], [test $mdw_cv_gnuish_as = yes])
134 if test $mdw_cv_gnuish_as = no; then CPUFAM=nil ABI=nil; fi
135
136 dnl A hairy macro used to set the `CPUFAM_...' and `ABI_...' variables.  We
137 dnl basically need to do the same thing for the family and ABI, so it's worth
138 dnl some effort to hide the ugliness.
139 m4_define([catacomb_DEFINE_CPU_OR_ABI],
140 [case $$1 in
141   m4_define([_def],
142     [m4_ifdef([catacomb_seen_$3/$$2], [],
143       [$$2)
144         AC_DEFINE([$4]m4_translit([$$2], [a-z], [A-Z]), [1], [$5])
145         ;;m4_define([catacomb_seen_$3/$$2], [t])])])
146   catacomb_CPU_FAMILIES([_def])
147   nil) ;;
148   *) AC_MSG_ERROR([BUG: unexpected $1 \`$1']) ;;
149 esac])
150
151 dnl Now that's out the way, we can explain what we're doing.
152 AC_MSG_CHECKING([CPU family and ABI])
153
154 dnl Figure out the target CPU family and ABI.
155 catacomb_CPU_FAMILIES([catacomb_CLEAR_FLAGS])
156 catacomb_DEFINE_CPU_OR_ABI([CPUFAM], [2], [cpu],
157   [CPUFAM_], [Define if target CPU is \`$][2\'.])
158 catacomb_DEFINE_CPU_OR_ABI([ABI], [3], [abi],
159   [ABI_], [Define if target ABI is \`$][3\'.])
160
161 dnl Establish Automake conditions for things.
162 catacomb_CPU_FAMILIES([catacomb_CLEAR_FLAGS])
163 m4_define([catacomb_COND_CPU],
164 [m4_define([_CPU], m4_translit([$2], [a-z], [A-Z]))
165 m4_define([_ABI], m4_translit([$3], [a-z], [A-Z]))
166 AM_CONDITIONAL([CPUABI_]_CPU[_]_ABI, [test x$CPUFAM/$ABI = x$2/$3])
167 m4_ifdef([catacomb_seen_cpu/$2], [],
168 [AM_CONDITIONAL([CPUFAM_]_CPU, [test x$CPUFAM = x$2])dnl
169 m4_define([catacomb_seen_cpu/$2], [t])])
170 m4_ifdef([catacomb_seen_abi/$3], [],
171 [AM_CONDITIONAL([ABI_]_ABI, [test x$ABI = x$3])dnl
172 m4_define([catacomb_seen_abi/$3], [t])])])
173 catacomb_CPU_FAMILIES([catacomb_COND_CPU])
174 AM_CONDITIONAL([KNOWN_CPUFAM], [test x$CPUFAM != xnil])
175
176 dnl Report on what we found.
177 case $CPUFAM in
178   nil) AC_MSG_RESULT([not supported]) ;;
179   *) AC_MSG_RESULT([$CPUFAM/$ABI]) ;;
180 esac
181
182 dnl--------------------------------------------------------------------------
183 dnl CPU-specific assembler features.
184
185 AC_LANG([CPPAS])
186
187 case $CPUFAM in
188   armel)
189     AC_CACHE_CHECK(
190       [whether the assembler understands ARMv8 crypto extensions],
191       [mdw_cv_as_armv8_crypto],
192       [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
193         .arch   armv8-a
194         .fpu    crypto-neon-fp-armv8
195
196         .text
197         .globl  foo
198 foo:
199         vldmia  r0, {d0-d3}
200         aese.8  q0, q1
201         aesmc.8 q0, q0
202         vstmia  r0, {d0, d1}
203         bx      r14]])],
204          [mdw_cv_as_armv8_crypto=yes],
205          [mdw_cv_as_armv8_crypto=no])])
206     ;;
207 esac
208
209 : ${mdw_cv_as_armv8_crypto=no}
210 AM_CONDITIONAL([HAVE_AS_ARMV8_CRYPTO], [test $mdw_cv_as_armv8_crypto = yes])
211 if test $mdw_cv_as_armv8_crypto = yes; then
212   AC_DEFINE([HAVE_AS_ARMV8_CRYPTO], [1],
213     [Define to 1 if your ARM assembler supports the ARMv8 crypto instructions.])
214 fi
215
216 dnl--------------------------------------------------------------------------
217 dnl C programming environment.
218
219 AC_LANG([C])
220
221 CATACOMB_LIBS=
222
223 dnl Find out if we're cross-compiling.
224 AM_CONDITIONAL([CROSS_COMPILING], [test "$cross_compiling" = yes])
225
226 dnl Various standard types.
227 AC_CHECK_TYPE([pid_t], [],
228   [AC_DEFINE([pid_t], [int],
229      [Define to `int' if <sys/types.h> does not define])])
230 AC_TYPE_UID_T
231 AC_CHECK_TYPE([ssize_t], [],
232   [AC_DEFINE([ssize_t], [int],
233      [Define to `int' if <sys/types.h> does not define])])
234 AC_CHECK_TYPE([socklen_t], [],
235   [AC_DEFINE([socklen_t], [int],
236      [Define to `int' if <sys/socket.h> does not define])],
237   [AC_INCLUDES_DEFAULT
238 #include <sys/socket.h>
239 ])
240
241 dnl The maths library.
242 mdw_ORIG_LIBS=$LIBS LIBS=
243 AC_SEARCH_LIBS([log], [m])
244 AC_SEARCH_LIBS([sqrt], [m])
245 AC_SUBST([MATHLIBS], [$LIBS])
246 LIBS=$mdw_ORIG_LIBS
247
248 dnl Find out whether very long integer types are available.
249 AC_CHECK_HEADERS([stdint.h])
250 AC_SUBST([have_stdint_h])
251 AX_C_LONG_LONG
252
253 dnl Some equipment wanted for checking CPU features at runtime.
254 AC_CHECK_HEADERS([asm/hwcap.h])
255 AC_CHECK_HEADERS([sys/auxv.h])
256 AC_CHECK_HEADERS([linux/auxvec.h])
257 AC_CHECK_FUNCS([getauxval])
258
259 dnl Find the bit lengths of the obvious integer types.  This will be useful
260 dnl when deciding on a representation for multiprecision integers.
261 type_bits="" type_bits_sep=""
262 AC_DEFUN([catacomb_UINT_BITS],
263   [mdw_UINT_BITS([$2], [$1])
264    type_bits="$type_bits$type_bits_sep('$1', $[]$1_bits)"
265    type_bits_sep=", "])
266 catacomb_UINT_BITS([uchar], [unsigned char])
267 catacomb_UINT_BITS([ushort], [unsigned short])
268 catacomb_UINT_BITS([uint], [unsigned int])
269 catacomb_UINT_BITS([ulong], [unsigned long])
270 if test "$ac_cv_c_long_long" = "yes"; then
271   catacomb_UINT_BITS([ullong], [unsigned long long])
272 fi
273 if test "$ac_cv_header_stdint_h" = "yes"; then
274   catacomb_UINT_BITS([uintmax], [uintmax_t])
275 fi
276 AC_SUBST([type_bits])
277
278 dnl Determine the limits of common C integer types.
279 limits="" limits_sep=""
280 AC_DEFUN([catacomb_COMPILE_TIME_CONSTANT],
281   [case "$2" in
282      =*)
283        $1="$2"; $1=${$1#=}
284        ;;
285      *)
286        AC_CACHE_CHECK([compile-time value of $2], [mdw_cv_constant_$3],
287                       [mdw_PROBE_CONSTANT([mdw_cv_constant_$3], [$2], [$4])])
288        $1=$mdw_cv_constant_$3
289        ;;
290    esac])
291 AC_DEFUN([catacomb_LIMIT],
292 [catacomb_COMPILE_TIME_CONSTANT([lo], [$2], [$1_min],
293 [#include <limits.h>
294 #include <stddef.h>])
295  catacomb_COMPILE_TIME_CONSTANT([hi], [$3], [$1_max],
296 [#include <limits.h>
297 #include <stddef.h>])
298  limits="$limits$limits_sep('$1', $lo, $hi)" limits_sep=", "])
299 catacomb_LIMIT([SCHAR],         [SCHAR_MIN],    [SCHAR_MAX])
300 catacomb_LIMIT([CHAR],          [CHAR_MIN],     [CHAR_MAX])
301 catacomb_LIMIT([UCHAR],         [=0],           [UCHAR_MAX])
302 catacomb_LIMIT([UINT8],         [=0],           [=0xff])
303 catacomb_LIMIT([SHRT],          [SHRT_MIN],     [SHRT_MAX])
304 catacomb_LIMIT([USHRT],         [=0],           [USHRT_MAX])
305 catacomb_LIMIT([UINT16],        [=0],           [=0xffff])
306 catacomb_LIMIT([INT],           [INT_MIN],      [INT_MAX])
307 catacomb_LIMIT([UINT],          [=0],           [UINT_MAX])
308 catacomb_LIMIT([LONG],          [LONG_MIN],     [LONG_MAX])
309 catacomb_LIMIT([ULONG],         [=0],           [ULONG_MAX])
310 catacomb_LIMIT([UINT32],        [=0],           [=0xffffffff])
311 if test "$ac_cv_c_long_long" = "yes"; then
312   catacomb_LIMIT([LLONG],       [LLONG_MIN],    [LLONG_MAX])
313   catacomb_LIMIT([ULLONG],      [=0],           [ULLONG_MAX])
314 fi
315 catacomb_LIMIT([SIZET],         [=0],           [~(size_t)0])
316 AC_SUBST([limits])
317
318 dnl Figure out other aspects of the implementation's arithmetic.
319 AC_CACHE_CHECK([whether negative numbers use two's complement],
320         [catacomb_cv_neg_twoc],
321 [AC_TRY_COMPILE(
322 [#include <limits.h>],
323 [int check[2*!!(-INT_MAX == INT_MIN + 1) - 1];],
324 [catacomb_cv_neg_twoc=yes],
325 [catacomb_cv_neg_twoc=no])])
326 case $catacomb_cv_neg_twoc in
327   yes)
328     AC_DEFINE([NEG_TWOC], [1],
329      [Define if signed numbers are represented in two's complement.])
330     ;;
331 esac
332
333 dnl Functions used for noise-gathering.
334 AC_CHECK_FUNCS([setgroups])
335 AC_CHECK_HEADERS([linux/random.h])
336 mdw_ORIG_LIBS=$LIBS LIBS=$CATACOMB_LIBS
337 AC_SEARCH_LIBS([clock_gettime], [rt])
338 CATACOMB_LIBS=$LIBS LIBS=$mdw_ORIG_LIBS
339 if test "$ac_cv_search_clock_gettime" != no; then
340   AC_DEFINE([HAVE_CLOCK_GETTIME], [1],
341             [Define if you have the \`clock_gettime' function.])
342 fi
343 AC_CHECK_FUNCS([getentropy])
344 AC_CACHE_CHECK([whether the freewheel noise generator will work],
345         [catacomb_cv_freewheel],
346 [AC_TRY_LINK(
347 [#include <setjmp.h>
348 #include <sys/time.h>],
349 [struct itimerval itv = { { 0, 0 }, { 0, 5000 } };
350 jmp_buf j;
351 setitimer(ITIMER_REAL, &itv, 0);
352 sigsetjmp(j, 1);],
353 [catacomb_cv_freewheel=yes],
354 [catacomb_cv_freewheel=no])])
355 case $catacomb_cv_freewheel in
356   yes)
357     AC_DEFINE([USE_FREEWHEEL], [1],
358               [Define if you want to use the freewheel noise generator.])
359     ;;
360 esac
361
362 dnl Support for the passphrase pixie.
363 mdw_ORIG_LIBS=$LIBS
364 AC_SEARCH_LIBS([socket], [socket])
365 AC_SUBST([PIXIE_LIBS], [$LIBS])
366 LIBS=$mdw_ORIG_LIBS
367
368 dnl Memory locking support.
369 AC_CHECK_FUNCS([mlock])
370
371 dnl Set the master libraries we need.
372 AC_SUBST([CATACOMB_LIBS])
373
374 dnl Necessary support libraries.
375 PKG_CHECK_MODULES([mLib], [mLib >= 2.2.2.1])
376 AM_CFLAGS="$AM_CFLAGS $mLib_CFLAGS"
377
378 dnl--------------------------------------------------------------------------
379 dnl Python.
380
381 dnl Make sure we have a suitable version.
382 AM_PATH_PYTHON([2.5])
383
384 dnl--------------------------------------------------------------------------
385 dnl Special debugging options.
386
387 AC_ARG_ENABLE([mpw],
388   [AS_HELP_STRING([--enable-mpw], [force small-width mp digits])],
389   [case "$enableval" in
390     y*|t*|short)
391       AC_DEFINE([FORCE_MPW_SHORT], [1],
392                 [Define to force small-width mp digits.])
393       ;;
394     cussid)
395       AC_DEFINE([FORCE_MPW_CUSSID], [1],
396                 [Define to force strange-width mp digits.])
397       ;;
398    esac])
399
400 dnl--------------------------------------------------------------------------
401 dnl Produce output.
402
403 AC_CONFIG_HEADER([config/config.h])
404
405 AC_CONFIG_FILES(
406   [Makefile]
407   [base/Makefile]
408   [key/Makefile]
409   [math/Makefile]
410   [misc/Makefile]
411   [pub/Makefile]
412   [rand/Makefile]
413   [symm/Makefile]
414   [progs/Makefile])
415 AC_OUTPUT
416
417 dnl----- That's all, folks --------------------------------------------------