3 dnl Configuration script for Catacomb
5 dnl (c) 2013 Straylight/Edgeware
8 dnl----- Licensing notice ---------------------------------------------------
10 dnl This file is part of Catacomb.
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.
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.
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.
27 dnl--------------------------------------------------------------------------
31 AC_INIT([catacomb], AUTO_VERSION, [mdw@distorted.org.uk])
32 AC_CONFIG_SRCDIR([catacomb.pc.in])
33 AC_CONFIG_AUX_DIR([config])
34 AC_CONFIG_MACRO_DIRS([m4])
35 AM_INIT_AUTOMAKE([foreign parallel-tests color-tests subdir-objects])
42 mdw_LIBTOOL_VERSION_INFO
44 cygwin* | mingw* | pw32* | os2* | darwin* | cegcc*)
45 TEST_LDFLAGS=-no-fast-install ;;
47 TEST_LDFLAGS=-no-install ;;
49 AC_SUBST([TEST_LDFLAGS])
57 dnl--------------------------------------------------------------------------
58 dnl Define language support for assembler.
60 dnl This is stolen from https://gitlab.crest.iu.edu/jsfiroz/hpx/commit/
61 dnl 84be4345db6eec3797a57b8e53483cb43f4733bf
63 AC_LANG_DEFINE([CPPAS], [cppas], [CPPAS], [CCAS], [C],
64 [ac_ext=S ac_cpp='$CPP $CPPFLAGS'
65 ac_compile='$CCAS -c $CCASFLAGS $CPPFLAGS dnl
66 conftest.$ac_ext >&AS_MESSAGE_LOG_FD'
67 ac_link='$CCAS -oconftest$ac_exeext $CCASFLAGS $CPPFLAGS $LDFLAGS dnl
68 conftest.$ac_ext $LIBS >&AS_MESSAGE_LOG_FD'])
70 AC_DEFUN([AC_LANG_PREPROC(CPPAS)], [AC_REQUIRE([AC_PROG_CPP])])
71 AC_DEFUN([AC_LANG_COMPILER(CPPAS)], [AC_REQUIRE([AM_PROG_AS])])
72 AC_DEFUN([AC_LANG_CONFTEST(CPPAS)],
73 [cat confdefs.h - <<_ACEOF >conftest.$ac_ext
78 dnl--------------------------------------------------------------------------
79 dnl Host-specific configuration.
81 dnl The table of CPU families and ABIs which we might support. Support is
82 dnl not uniform: each dispatched function might or might not have an
83 dnl implementation for any particular CPU/ABI combination.
84 AC_DEFUN([catacomb_CPU_FAMILIES],
85 [$1([i[[3-6]]86,cygwin], [x86], [win])
86 $1([i[[3-6]]86,*], [x86], [sysv])
87 $1([x86_64,cygwin], [amd64], [win])
88 $1([x86_64,*], [amd64], [sysv])
89 $1([arm,* | armv*,*], [armel], [std])
90 $1([aarch64,*], [arm64], [std])])
92 dnl A utility to clear the `seen' flags, used so as to process each CPU or
94 m4_define([catacomb_CLEAR_FLAGS],
95 [m4_ifdef([catacomb_seen_cpu/$2],
96 [m4_undefine([catacomb_seen_cpu/$2])])dnl
97 m4_ifdef([catacomb_seen_abi/$3],
98 [m4_undefine([catacomb_seen_abi/$3])])])
100 dnl Identify the current host.
101 case $host_cpu,$host_os in
102 m4_define([catacomb_CPU_CASE],
103 [$1) CPUFAM=$2 ABI=$3 ;;
105 catacomb_CPU_FAMILIES([catacomb_CPU_CASE])
106 *) CPUFAM=nil ABI=nil ;;
109 dnl Now check the assembler. We have target-specific requirements here, so
110 dnl we couldn't do this any earlier.
112 [whether the assembler is likely to work], [mdw_cv_gnuish_as],
113 [AC_LANG_PUSH([CPPAS])
114 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
118 .L\$_test = .L\$_test + 1
123 [mdw_cv_gnuish_as=yes], [mdw_cv_gnuish_as=no])
126 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
129 .intel_syntax noprefix
137 [:], [mdw_cv_gnuish_as=no])
140 AC_LANG_POP([CPPAS])])
141 AM_CONDITIONAL([GNUISH_AS], [test $mdw_cv_gnuish_as = yes])
142 if test $mdw_cv_gnuish_as = no; then CPUFAM=nil ABI=nil; fi
144 dnl A hairy macro used to set the `CPUFAM_...' and `ABI_...' variables. We
145 dnl basically need to do the same thing for the family and ABI, so it's worth
146 dnl some effort to hide the ugliness.
147 m4_define([catacomb_DEFINE_CPU_OR_ABI],
150 [m4_ifdef([catacomb_seen_$3/$$2], [],
152 AC_DEFINE([$4]m4_translit([$$2], [a-z], [A-Z]), [1], [$5])
153 ;;m4_define([catacomb_seen_$3/$$2], [t])])])
154 catacomb_CPU_FAMILIES([_def])
156 *) AC_MSG_ERROR([BUG: unexpected $1 \`$$1']) ;;
159 dnl Now that's out the way, we can explain what we're doing.
160 AC_MSG_CHECKING([CPU family and ABI])
162 dnl Figure out the target CPU family and ABI.
163 catacomb_CPU_FAMILIES([catacomb_CLEAR_FLAGS])
164 catacomb_DEFINE_CPU_OR_ABI([CPUFAM], [2], [cpu],
165 [CPUFAM_], [Define if target CPU is \`$][2\'.])
166 catacomb_DEFINE_CPU_OR_ABI([ABI], [3], [abi],
167 [ABI_], [Define if target ABI is \`$][3\'.])
169 dnl Establish Automake conditions for things.
170 catacomb_CPU_FAMILIES([catacomb_CLEAR_FLAGS])
171 m4_define([catacomb_COND_CPU],
172 [m4_define([_CPU], m4_translit([$2], [a-z], [A-Z]))
173 m4_define([_ABI], m4_translit([$3], [a-z], [A-Z]))
174 AM_CONDITIONAL([CPUABI_]_CPU[_]_ABI, [test x$CPUFAM/$ABI = x$2/$3])
175 m4_ifdef([catacomb_seen_cpu/$2], [],
176 [AM_CONDITIONAL([CPUFAM_]_CPU, [test x$CPUFAM = x$2])dnl
177 m4_define([catacomb_seen_cpu/$2], [t])])
178 m4_ifdef([catacomb_seen_abi/$3], [],
179 [AM_CONDITIONAL([ABI_]_ABI, [test x$ABI = x$3])dnl
180 m4_define([catacomb_seen_abi/$3], [t])])])
181 catacomb_CPU_FAMILIES([catacomb_COND_CPU])
182 AM_CONDITIONAL([KNOWN_CPUFAM], [test x$CPUFAM != xnil])
184 dnl Report on what we found.
186 nil) AC_MSG_RESULT([not supported]) ;;
187 *) AC_MSG_RESULT([$CPUFAM/$ABI]) ;;
190 dnl Consider enabling support for assembler-level debugging toys.
191 AC_ARG_ENABLE([asm-debug],
192 AS_HELP_STRING([--enable-asm-debug],
193 [enable assembler debugging features]),
194 [mdw_asm_debug=$enableval], [mdw_asm_debug=no])
195 case $CPUFAM in nil) mdw_asm_debug=no ;; esac
196 case $mdw_asm_debug in
198 *) AC_DEFINE([ENABLE_ASM_DEBUG], [1],
199 [Define to enable assembler-level debugging.]) ;;
201 AM_CONDITIONAL([ASM_DEBUG], [test x$mdw_asm_debug != xno])
203 dnl Check for leading underscores on C symbols.
205 case $sys_symbol_underscore in
206 yes) AC_DEFINE([SYM_USCORE], [1],
207 [Define if C symbols are prefixed with an underscore.]) ;;
210 dnl--------------------------------------------------------------------------
211 dnl CPU-specific assembler features.
218 [whether the assembler understands ARMv8 crypto extensions],
219 [mdw_cv_as_armv8_crypto],
220 [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
222 .fpu crypto-neon-fp-armv8
232 [mdw_cv_as_armv8_crypto=yes],
233 [mdw_cv_as_armv8_crypto=no])])
237 : ${mdw_cv_as_armv8_crypto=no}
238 AM_CONDITIONAL([HAVE_AS_ARMV8_CRYPTO], [test $mdw_cv_as_armv8_crypto = yes])
239 if test $mdw_cv_as_armv8_crypto = yes; then
240 AC_DEFINE([HAVE_AS_ARMV8_CRYPTO], [1],
241 [Define to 1 if your ARM assembler supports the ARMv8 crypto instructions.])
244 dnl--------------------------------------------------------------------------
245 dnl C programming environment.
251 dnl Find out if we're cross-compiling.
252 AM_CONDITIONAL([CROSS_COMPILING], [test "$cross_compiling" = yes])
254 dnl Various standard types.
255 AC_CHECK_TYPE([pid_t], [],
256 [AC_DEFINE([pid_t], [int],
257 [Define to `int' if <sys/types.h> does not define])])
259 AC_CHECK_TYPE([ssize_t], [],
260 [AC_DEFINE([ssize_t], [int],
261 [Define to `int' if <sys/types.h> does not define])])
262 AC_CHECK_TYPE([socklen_t], [],
263 [AC_DEFINE([socklen_t], [int],
264 [Define to `int' if <sys/socket.h> does not define])],
266 #include <sys/socket.h>
269 dnl The maths library.
270 mdw_ORIG_LIBS=$LIBS LIBS=$CATACOMB_LIBS
271 AC_SEARCH_LIBS([log], [m])
272 AC_SEARCH_LIBS([sqrt], [m])
273 CATACOMB_LIBS=$LIBS LIBS=$mdw_ORIG_LIBS
275 dnl Logging is weird under Termux. Unfortunately, it involves macros, so we
276 dnl have to do this the hard way.
278 [library needed for syslog], [mdw_cv_syslog_lib],
279 [mdw_ORIG_LIBS=$LIBS LIBS=
281 AC_TRY_LINK([#include <syslog.h>],
282 [openlog("test", LOG_PID, LOG_DAEMON);
283 syslog(LOG_ERR, "this is a test");],
286 *,t) mdw_cv_syslog_lib=${LIBS:-none}; break ;;
287 0,nil) LIBS="-llog" ;;
288 1,nil) AC_MSG_ERROR("failed to link test program") ;;
291 LIBS=$mdw_ORIG_LIBS])
292 case $mdw_cv_syslog_lib in
294 *) LOGLIBS=$mdw_cv_syslog_lib ;;
298 dnl Find out whether very long integer types are available.
299 AC_CHECK_HEADERS([stdint.h])
300 AC_SUBST([have_stdint_h])
303 dnl Some equipment wanted for checking CPU features at runtime.
304 AC_CHECK_HEADERS([asm/hwcap.h])
305 AC_CHECK_HEADERS([sys/auxv.h])
306 AC_CHECK_HEADERS([linux/auxvec.h])
307 AC_CHECK_FUNCS([getauxval])
309 dnl Some equipment for measuring CPU performance.
310 AC_CHECK_HEADERS([linux/perf_event.h])
312 dnl Find the bit lengths of the obvious integer types. This will be useful
313 dnl when deciding on a representation for multiprecision integers.
314 type_bits="" type_bits_sep=""
315 AC_DEFUN([catacomb_UINT_BITS],
316 [mdw_UINT_BITS([$2], [$1])
317 type_bits="$type_bits$type_bits_sep('$1', $[]$1_bits)"
319 catacomb_UINT_BITS([uchar], [unsigned char])
320 catacomb_UINT_BITS([ushort], [unsigned short])
321 catacomb_UINT_BITS([uint], [unsigned int])
322 catacomb_UINT_BITS([ulong], [unsigned long])
323 if test "$ac_cv_c_long_long" = "yes"; then
324 catacomb_UINT_BITS([ullong], [unsigned long long])
326 if test "$ac_cv_header_stdint_h" = "yes"; then
327 catacomb_UINT_BITS([uintmax], [uintmax_t])
329 AC_SUBST([type_bits])
331 dnl Determine the limits of common C integer types.
332 limits="" limits_sep=""
333 AC_DEFUN([catacomb_COMPILE_TIME_CONSTANT],
339 AC_CACHE_CHECK([compile-time value of $2], [mdw_cv_constant_$3],
340 [mdw_PROBE_CONSTANT([mdw_cv_constant_$3], [$2], [$4])])
341 $1=$mdw_cv_constant_$3
344 AC_DEFUN([catacomb_LIMIT],
345 [catacomb_COMPILE_TIME_CONSTANT([lo], [$2], [$1_min],
347 #include <stddef.h>])
348 catacomb_COMPILE_TIME_CONSTANT([hi], [$3], [$1_max],
350 #include <stddef.h>])
351 limits="$limits$limits_sep('$1', $lo, $hi)" limits_sep=", "])
352 catacomb_LIMIT([SCHAR], [SCHAR_MIN], [SCHAR_MAX])
353 catacomb_LIMIT([CHAR], [CHAR_MIN], [CHAR_MAX])
354 catacomb_LIMIT([UCHAR], [=0], [UCHAR_MAX])
355 catacomb_LIMIT([UINT8], [=0], [=0xff])
356 catacomb_LIMIT([SHRT], [SHRT_MIN], [SHRT_MAX])
357 catacomb_LIMIT([USHRT], [=0], [USHRT_MAX])
358 catacomb_LIMIT([UINT16], [=0], [=0xffff])
359 catacomb_LIMIT([INT], [INT_MIN], [INT_MAX])
360 catacomb_LIMIT([UINT], [=0], [UINT_MAX])
361 catacomb_LIMIT([LONG], [LONG_MIN], [LONG_MAX])
362 catacomb_LIMIT([ULONG], [=0], [ULONG_MAX])
363 catacomb_LIMIT([UINT32], [=0], [=0xffffffff])
364 if test "$ac_cv_c_long_long" = "yes"; then
365 catacomb_LIMIT([LLONG], [LLONG_MIN], [LLONG_MAX])
366 catacomb_LIMIT([ULLONG], [=0], [ULLONG_MAX])
368 catacomb_LIMIT([SIZET], [=0], [~(size_t)0])
371 dnl Figure out other aspects of the implementation's arithmetic.
372 AC_CACHE_CHECK([whether negative numbers use two's complement],
373 [catacomb_cv_neg_twoc],
375 [#include <limits.h>],
376 [int check[2*!!(-INT_MAX == INT_MIN + 1) - 1];],
377 [catacomb_cv_neg_twoc=yes],
378 [catacomb_cv_neg_twoc=no])])
379 case $catacomb_cv_neg_twoc in
381 AC_DEFINE([NEG_TWOC], [1],
382 [Define if signed numbers are represented in two's complement.])
386 dnl Functions used for noise-gathering.
387 AC_CHECK_FUNCS([setgroups])
388 AC_CHECK_HEADERS([linux/random.h])
389 mdw_ORIG_LIBS=$LIBS LIBS=$CATACOMB_LIBS
390 AC_SEARCH_LIBS([clock_gettime], [rt])
391 CATACOMB_LIBS=$LIBS LIBS=$mdw_ORIG_LIBS
392 if test "$ac_cv_search_clock_gettime" != no; then
393 AC_DEFINE([HAVE_CLOCK_GETTIME], [1],
394 [Define if you have the \`clock_gettime' function.])
396 AC_CHECK_FUNCS([getentropy])
397 AC_CACHE_CHECK([whether the freewheel noise generator will work],
398 [catacomb_cv_freewheel],
401 #include <sys/time.h>],
402 [struct itimerval itv = { { 0, 0 }, { 0, 5000 } };
404 setitimer(ITIMER_REAL, &itv, 0);
406 [catacomb_cv_freewheel=yes],
407 [catacomb_cv_freewheel=no])])
408 case $catacomb_cv_freewheel in
410 AC_DEFINE([USE_FREEWHEEL], [1],
411 [Define if you want to use the freewheel noise generator.])
415 dnl Support for the passphrase pixie.
417 AC_SEARCH_LIBS([socket], [socket])
418 AC_SUBST([PIXIE_LIBS], [$LIBS])
421 dnl Memory locking support.
422 AC_CHECK_FUNCS([mlock])
424 dnl See if we can find Valgrind's header files.
425 AC_CHECK_HEADER([valgrind/memcheck.h],
426 AC_DEFINE([HAVE_VALGRIND_H], [1],
427 [Define if the Valgrind header files are available.])
430 dnl Set the master libraries we need.
431 AC_SUBST([CATACOMB_LIBS])
433 dnl Necessary support libraries.
434 PKG_CHECK_MODULES([mLib], [mLib >= 2.4.1])
435 AM_CFLAGS="$AM_CFLAGS $mLib_CFLAGS"
437 dnl--------------------------------------------------------------------------
440 dnl Make sure we have a suitable version.
441 AM_PATH_PYTHON([2.5])
443 dnl--------------------------------------------------------------------------
444 dnl Special debugging options.
447 [AS_HELP_STRING([--enable-mpw], [force small-width mp digits])],
448 [case "$enableval" in
450 AC_DEFINE([FORCE_MPW_SHORT], [1],
451 [Define to force small-width mp digits.])
454 AC_DEFINE([FORCE_MPW_CUSSID], [1],
455 [Define to force strange-width mp digits.])
459 dnl--------------------------------------------------------------------------
462 AC_CONFIG_HEADER([config/config.h])
476 dnl----- That's all, folks --------------------------------------------------