2 AC_INIT([libsecp256k1],[0.1])
3 AC_CONFIG_AUX_DIR([build-aux])
4 AC_CONFIG_MACRO_DIR([build-aux/m4])
6 AH_TOP([#ifndef LIBSECP256K1_CONFIG_H])
7 AH_TOP([#define LIBSECP256K1_CONFIG_H])
8 AH_BOTTOM([#endif /*LIBSECP256K1_CONFIG_H*/])
9 AM_INIT_AUTOMAKE([foreign subdir-objects])
11 # Set -g if CFLAGS are not already set, which matches the default autoconf
12 # behavior (see PROG_CC in the Autoconf manual) with the exception that we don't
13 # set -O2 here because we set it in any case (see further down).
17 dnl make the compilation flags quiet unless V=1 is used
18 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
23 AC_PATH_TOOL(RANLIB, ranlib)
24 AC_PATH_TOOL(STRIP, strip)
30 if test x"$ac_cv_prog_cc_c89" = x"no"; then
31 AC_MSG_ERROR([c89 compiler support required])
37 if test x$cross_compiling != xyes; then
38 AC_PATH_PROG([BREW],brew,)
39 if test x$BREW != x; then
40 dnl These Homebrew packages may be keg-only, meaning that they won't be found
41 dnl in expected paths because they may conflict with system files. Ask
42 dnl Homebrew where each one is located, then adjust paths accordingly.
44 openssl_prefix=`$BREW --prefix openssl 2>/dev/null`
45 gmp_prefix=`$BREW --prefix gmp 2>/dev/null`
46 if test x$openssl_prefix != x; then
47 PKG_CONFIG_PATH="$openssl_prefix/lib/pkgconfig:$PKG_CONFIG_PATH"
48 export PKG_CONFIG_PATH
49 CRYPTO_CPPFLAGS="-I$openssl_prefix/include"
51 if test x$gmp_prefix != x; then
52 GMP_CPPFLAGS="-I$gmp_prefix/include"
53 GMP_LIBS="-L$gmp_prefix/lib"
56 AC_PATH_PROG([PORT],port,)
57 dnl if homebrew isn't installed and macports is, add the macports default paths
59 if test x$PORT != x; then
60 CPPFLAGS="$CPPFLAGS -isystem /opt/local/include"
61 LDFLAGS="$LDFLAGS -L/opt/local/lib"
70 warn_CFLAGS="-std=c89 -pedantic -Wall -Wextra -Wcast-align -Wnested-externs -Wshadow -Wstrict-prototypes -Wundef -Wno-unused-function -Wno-long-long -Wno-overlength-strings"
71 saved_CFLAGS="$CFLAGS"
72 CFLAGS="$warn_CFLAGS $CFLAGS"
73 AC_MSG_CHECKING([if ${CC} supports ${warn_CFLAGS}])
74 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
75 [ AC_MSG_RESULT([yes]) ],
77 CFLAGS="$saved_CFLAGS"
80 saved_CFLAGS="$CFLAGS"
81 CFLAGS="-fvisibility=hidden $CFLAGS"
82 AC_MSG_CHECKING([if ${CC} supports -fvisibility=hidden])
83 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
84 [ AC_MSG_RESULT([yes]) ],
86 CFLAGS="$saved_CFLAGS"
89 AC_ARG_ENABLE(benchmark,
90 AS_HELP_STRING([--enable-benchmark],[compile benchmark [default=yes]]),
91 [use_benchmark=$enableval],
94 AC_ARG_ENABLE(coverage,
95 AS_HELP_STRING([--enable-coverage],[enable compiler flags to support kcov coverage analysis [default=no]]),
96 [enable_coverage=$enableval],
100 AS_HELP_STRING([--enable-tests],[compile tests [default=yes]]),
101 [use_tests=$enableval],
104 AC_ARG_ENABLE(openssl_tests,
105 AS_HELP_STRING([--enable-openssl-tests],[enable OpenSSL tests [default=auto]]),
106 [enable_openssl_tests=$enableval],
107 [enable_openssl_tests=auto])
109 AC_ARG_ENABLE(experimental,
110 AS_HELP_STRING([--enable-experimental],[allow experimental configure options [default=no]]),
111 [use_experimental=$enableval],
112 [use_experimental=no])
114 AC_ARG_ENABLE(exhaustive_tests,
115 AS_HELP_STRING([--enable-exhaustive-tests],[compile exhaustive tests [default=yes]]),
116 [use_exhaustive_tests=$enableval],
117 [use_exhaustive_tests=yes])
119 AC_ARG_ENABLE(ecmult_static_precomputation,
120 AS_HELP_STRING([--enable-ecmult-static-precomputation],[enable precomputed ecmult table for signing [default=auto]]),
121 [use_ecmult_static_precomputation=$enableval],
122 [use_ecmult_static_precomputation=auto])
124 AC_ARG_ENABLE(module_ecdh,
125 AS_HELP_STRING([--enable-module-ecdh],[enable ECDH shared secret computation (experimental)]),
126 [enable_module_ecdh=$enableval],
127 [enable_module_ecdh=no])
129 AC_ARG_ENABLE(module_recovery,
130 AS_HELP_STRING([--enable-module-recovery],[enable ECDSA pubkey recovery module [default=no]]),
131 [enable_module_recovery=$enableval],
132 [enable_module_recovery=no])
134 AC_ARG_ENABLE(module_extrakeys,
135 AS_HELP_STRING([--enable-module-extrakeys],[enable extrakeys module (experimental)]),
136 [enable_module_extrakeys=$enableval],
137 [enable_module_extrakeys=no])
139 AC_ARG_ENABLE(module_schnorrsig,
140 AS_HELP_STRING([--enable-module-schnorrsig],[enable schnorrsig module (experimental)]),
141 [enable_module_schnorrsig=$enableval],
142 [enable_module_schnorrsig=no])
144 AC_ARG_ENABLE(external_default_callbacks,
145 AS_HELP_STRING([--enable-external-default-callbacks],[enable external default callback functions [default=no]]),
146 [use_external_default_callbacks=$enableval],
147 [use_external_default_callbacks=no])
149 dnl Test-only override of the (autodetected by the C code) "widemul" setting.
150 dnl Legal values are int64 (for [u]int64_t), int128 (for [unsigned] __int128), and auto (the default).
151 AC_ARG_WITH([test-override-wide-multiply], [] ,[set_widemul=$withval], [set_widemul=auto])
153 AC_ARG_WITH([bignum], [AS_HELP_STRING([--with-bignum=gmp|no|auto],
154 [bignum implementation to use [default=auto]])],[req_bignum=$withval], [req_bignum=auto])
156 AC_ARG_WITH([asm], [AS_HELP_STRING([--with-asm=x86_64|arm|no|auto],
157 [assembly optimizations to useĀ (experimental: arm) [default=auto]])],[req_asm=$withval], [req_asm=auto])
159 AC_ARG_WITH([ecmult-window], [AS_HELP_STRING([--with-ecmult-window=SIZE|auto],
160 [window size for ecmult precomputation for verification, specified as integer in range [2..24].]
161 [Larger values result in possibly better performance at the cost of an exponentially larger precomputed table.]
162 [The table will store 2^(SIZE-1) * 64 bytes of data but can be larger in memory due to platform-specific padding and alignment.]
163 ["auto" is a reasonable setting for desktop machines (currently 15). [default=auto]]
165 [req_ecmult_window=$withval], [req_ecmult_window=auto])
167 AC_ARG_WITH([ecmult-gen-precision], [AS_HELP_STRING([--with-ecmult-gen-precision=2|4|8|auto],
168 [Precision bits to tune the precomputed table size for signing.]
169 [The size of the table is 32kB for 2 bits, 64kB for 4 bits, 512kB for 8 bits of precision.]
170 [A larger table size usually results in possible faster signing.]
171 ["auto" is a reasonable setting for desktop machines (currently 4). [default=auto]]
173 [req_ecmult_gen_precision=$withval], [req_ecmult_gen_precision=auto])
175 AC_ARG_WITH([valgrind], [AS_HELP_STRING([--with-valgrind=yes|no|auto],
176 [Build with extra checks for running inside Valgrind [default=auto]]
178 [req_valgrind=$withval], [req_valgrind=auto])
180 if test x"$req_valgrind" = x"no"; then
183 AC_CHECK_HEADER([valgrind/memcheck.h], [enable_valgrind=yes], [
184 if test x"$req_valgrind" = x"yes"; then
185 AC_MSG_ERROR([Valgrind support explicitly requested but valgrind/memcheck.h header not available])
190 AM_CONDITIONAL([VALGRIND_ENABLED],[test "$enable_valgrind" = "yes"])
192 if test x"$enable_coverage" = x"yes"; then
193 AC_DEFINE(COVERAGE, 1, [Define this symbol to compile out all VERIFY code])
194 CFLAGS="-O0 --coverage $CFLAGS"
195 LDFLAGS="--coverage $LDFLAGS"
200 if test x"$use_ecmult_static_precomputation" != x"no"; then
201 # Temporarily switch to an environment for the native compiler
202 save_cross_compiling=$cross_compiling
206 SAVE_CFLAGS="$CFLAGS"
207 CFLAGS="$CFLAGS_FOR_BUILD"
208 SAVE_CPPFLAGS="$CPPFLAGS"
209 CPPFLAGS="$CPPFLAGS_FOR_BUILD"
210 SAVE_LDFLAGS="$LDFLAGS"
211 LDFLAGS="$LDFLAGS_FOR_BUILD"
213 warn_CFLAGS_FOR_BUILD="-Wall -Wextra -Wno-unused-function"
214 saved_CFLAGS="$CFLAGS"
215 CFLAGS="$warn_CFLAGS_FOR_BUILD $CFLAGS"
216 AC_MSG_CHECKING([if native ${CC_FOR_BUILD} supports ${warn_CFLAGS_FOR_BUILD}])
217 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
218 [ AC_MSG_RESULT([yes]) ],
219 [ AC_MSG_RESULT([no])
220 CFLAGS="$saved_CFLAGS"
223 AC_MSG_CHECKING([for working native compiler: ${CC_FOR_BUILD}])
225 [AC_LANG_PROGRAM([], [])],
226 [working_native_cc=yes],
227 [working_native_cc=no],[:])
229 CFLAGS_FOR_BUILD="$CFLAGS"
231 # Restore the environment
232 cross_compiling=$save_cross_compiling
234 CFLAGS="$SAVE_CFLAGS"
235 CPPFLAGS="$SAVE_CPPFLAGS"
236 LDFLAGS="$SAVE_LDFLAGS"
238 if test x"$working_native_cc" = x"no"; then
241 m4_define([please_set_for_build], [Please set CC_FOR_BUILD, CFLAGS_FOR_BUILD, CPPFLAGS_FOR_BUILD, and/or LDFLAGS_FOR_BUILD.])
242 if test x"$use_ecmult_static_precomputation" = x"yes"; then
243 AC_MSG_ERROR([native compiler ${CC_FOR_BUILD} does not produce working binaries. please_set_for_build])
245 AC_MSG_WARN([Disabling statically generated ecmult table because the native compiler ${CC_FOR_BUILD} does not produce working binaries. please_set_for_build])
255 if test x"$req_asm" = x"auto"; then
257 if test x"$has_64bit_asm" = x"yes"; then
260 if test x"$set_asm" = x; then
268 if test x"$has_64bit_asm" != x"yes"; then
269 AC_MSG_ERROR([x86_64 assembly optimization requested but not available])
277 AC_MSG_ERROR([invalid assembly optimization selection])
282 if test x"$req_bignum" = x"auto"; then
284 if test x"$has_gmp" = x"yes"; then
288 if test x"$set_bignum" = x; then
292 set_bignum=$req_bignum
296 if test x"$has_gmp" != x"yes"; then
297 AC_MSG_ERROR([gmp bignum explicitly requested but libgmp not available])
303 AC_MSG_ERROR([invalid bignum implementation selection])
308 # select assembly optimization
313 AC_DEFINE(USE_ASM_X86_64, 1, [Define this symbol to enable x86_64 assembly optimizations])
321 AC_MSG_ERROR([invalid assembly optimizations])
325 # select wide multiplication implementation
328 AC_DEFINE(USE_FORCE_WIDEMUL_INT128, 1, [Define this symbol to force the use of the (unsigned) __int128 based wide multiplication implementation])
331 AC_DEFINE(USE_FORCE_WIDEMUL_INT64, 1, [Define this symbol to force the use of the (u)int64_t based wide multiplication implementation])
336 AC_MSG_ERROR([invalid wide multiplication implementation])
340 # select bignum implementation
343 AC_DEFINE(HAVE_LIBGMP, 1, [Define this symbol if libgmp is installed])
344 AC_DEFINE(USE_NUM_GMP, 1, [Define this symbol to use the gmp implementation for num])
345 AC_DEFINE(USE_FIELD_INV_NUM, 1, [Define this symbol to use the num-based field inverse implementation])
346 AC_DEFINE(USE_SCALAR_INV_NUM, 1, [Define this symbol to use the num-based scalar inverse implementation])
349 AC_DEFINE(USE_NUM_NONE, 1, [Define this symbol to use no num implementation])
350 AC_DEFINE(USE_FIELD_INV_BUILTIN, 1, [Define this symbol to use the native field inverse implementation])
351 AC_DEFINE(USE_SCALAR_INV_BUILTIN, 1, [Define this symbol to use the native scalar inverse implementation])
354 AC_MSG_ERROR([invalid bignum implementation])
358 #set ecmult window size
359 if test x"$req_ecmult_window" = x"auto"; then
362 set_ecmult_window=$req_ecmult_window
365 error_window_size=['window size for ecmult precomputation not an integer in range [2..24] or "auto"']
366 case $set_ecmult_window in
369 AC_MSG_ERROR($error_window_size)
372 if test "$set_ecmult_window" -lt 2 -o "$set_ecmult_window" -gt 24 ; then
374 AC_MSG_ERROR($error_window_size)
376 AC_DEFINE_UNQUOTED(ECMULT_WINDOW_SIZE, $set_ecmult_window, [Set window size for ecmult precomputation])
380 #set ecmult gen precision
381 if test x"$req_ecmult_gen_precision" = x"auto"; then
382 set_ecmult_gen_precision=4
384 set_ecmult_gen_precision=$req_ecmult_gen_precision
387 case $set_ecmult_gen_precision in
389 AC_DEFINE_UNQUOTED(ECMULT_GEN_PREC_BITS, $set_ecmult_gen_precision, [Set ecmult gen precision bits])
392 AC_MSG_ERROR(['ecmult gen precision not 2, 4, 8 or "auto"'])
396 if test x"$use_tests" = x"yes"; then
398 if test x"$has_openssl_ec" = x"yes"; then
399 if test x"$enable_openssl_tests" != x"no"; then
400 AC_DEFINE(ENABLE_OPENSSL_TESTS, 1, [Define this symbol if OpenSSL EC functions are available])
401 SECP_TEST_INCLUDES="$SSL_CFLAGS $CRYPTO_CFLAGS $CRYPTO_CPPFLAGS"
402 SECP_TEST_LIBS="$CRYPTO_LIBS"
406 SECP_TEST_LIBS="$SECP_TEST_LIBS -lgdi32"
411 if test x"$enable_openssl_tests" = x"yes"; then
412 AC_MSG_ERROR([OpenSSL tests requested but OpenSSL with EC support is not available])
416 if test x"$enable_openssl_tests" = x"yes"; then
417 AC_MSG_ERROR([OpenSSL tests requested but tests are not enabled])
421 if test x"$set_bignum" = x"gmp"; then
422 SECP_LIBS="$SECP_LIBS $GMP_LIBS"
423 SECP_INCLUDES="$SECP_INCLUDES $GMP_CPPFLAGS"
426 if test x"$set_precomp" = x"yes"; then
427 AC_DEFINE(USE_ECMULT_STATIC_PRECOMPUTATION, 1, [Define this symbol to use a statically generated ecmult table])
430 if test x"$enable_module_ecdh" = x"yes"; then
431 AC_DEFINE(ENABLE_MODULE_ECDH, 1, [Define this symbol to enable the ECDH module])
434 if test x"$enable_module_recovery" = x"yes"; then
435 AC_DEFINE(ENABLE_MODULE_RECOVERY, 1, [Define this symbol to enable the ECDSA pubkey recovery module])
438 if test x"$enable_module_schnorrsig" = x"yes"; then
439 AC_DEFINE(ENABLE_MODULE_SCHNORRSIG, 1, [Define this symbol to enable the schnorrsig module])
440 enable_module_extrakeys=yes
443 # Test if extrakeys is set after the schnorrsig module to allow the schnorrsig
444 # module to set enable_module_extrakeys=yes
445 if test x"$enable_module_extrakeys" = x"yes"; then
446 AC_DEFINE(ENABLE_MODULE_EXTRAKEYS, 1, [Define this symbol to enable the extrakeys module])
449 if test x"$use_external_asm" = x"yes"; then
450 AC_DEFINE(USE_EXTERNAL_ASM, 1, [Define this symbol if an external (non-inline) assembly implementation is used])
453 if test x"$use_external_default_callbacks" = x"yes"; then
454 AC_DEFINE(USE_EXTERNAL_DEFAULT_CALLBACKS, 1, [Define this symbol if an external implementation of the default callbacks is used])
457 if test x"$enable_experimental" = x"yes"; then
458 AC_MSG_NOTICE([******])
459 AC_MSG_NOTICE([WARNING: experimental build])
460 AC_MSG_NOTICE([Experimental features do not have stable APIs or properties, and may not be safe for production use.])
461 AC_MSG_NOTICE([Building ECDH module: $enable_module_ecdh])
462 AC_MSG_NOTICE([Building extrakeys module: $enable_module_extrakeys])
463 AC_MSG_NOTICE([Building schnorrsig module: $enable_module_schnorrsig])
464 AC_MSG_NOTICE([******])
466 if test x"$enable_module_ecdh" = x"yes"; then
467 AC_MSG_ERROR([ECDH module is experimental. Use --enable-experimental to allow.])
469 if test x"$enable_module_extrakeys" = x"yes"; then
470 AC_MSG_ERROR([extrakeys module is experimental. Use --enable-experimental to allow.])
472 if test x"$enable_module_schnorrsig" = x"yes"; then
473 AC_MSG_ERROR([schnorrsig module is experimental. Use --enable-experimental to allow.])
475 if test x"$set_asm" = x"arm"; then
476 AC_MSG_ERROR([ARM assembly optimization is experimental. Use --enable-experimental to allow.])
480 AC_CONFIG_HEADERS([src/libsecp256k1-config.h])
481 AC_CONFIG_FILES([Makefile libsecp256k1.pc])
482 AC_SUBST(SECP_INCLUDES)
484 AC_SUBST(SECP_TEST_LIBS)
485 AC_SUBST(SECP_TEST_INCLUDES)
486 AM_CONDITIONAL([ENABLE_COVERAGE], [test x"$enable_coverage" = x"yes"])
487 AM_CONDITIONAL([USE_TESTS], [test x"$use_tests" != x"no"])
488 AM_CONDITIONAL([USE_EXHAUSTIVE_TESTS], [test x"$use_exhaustive_tests" != x"no"])
489 AM_CONDITIONAL([USE_BENCHMARK], [test x"$use_benchmark" = x"yes"])
490 AM_CONDITIONAL([USE_ECMULT_STATIC_PRECOMPUTATION], [test x"$set_precomp" = x"yes"])
491 AM_CONDITIONAL([ENABLE_MODULE_ECDH], [test x"$enable_module_ecdh" = x"yes"])
492 AM_CONDITIONAL([ENABLE_MODULE_RECOVERY], [test x"$enable_module_recovery" = x"yes"])
493 AM_CONDITIONAL([ENABLE_MODULE_EXTRAKEYS], [test x"$enable_module_extrakeys" = x"yes"])
494 AM_CONDITIONAL([ENABLE_MODULE_SCHNORRSIG], [test x"$enable_module_schnorrsig" = x"yes"])
495 AM_CONDITIONAL([USE_EXTERNAL_ASM], [test x"$use_external_asm" = x"yes"])
496 AM_CONDITIONAL([USE_ASM_ARM], [test x"$set_asm" = x"arm"])
498 dnl make sure nothing new is exported so that we don't break the cache
499 PKGCONFIG_PATH_TEMP="$PKG_CONFIG_PATH"
500 unset PKG_CONFIG_PATH
501 PKG_CONFIG_PATH="$PKGCONFIG_PATH_TEMP"
506 echo "Build Options:"
507 echo " with ecmult precomp = $set_precomp"
508 echo " with external callbacks = $use_external_default_callbacks"
509 echo " with benchmarks = $use_benchmark"
510 echo " with coverage = $enable_coverage"
511 echo " module ecdh = $enable_module_ecdh"
512 echo " module recovery = $enable_module_recovery"
513 echo " module extrakeys = $enable_module_extrakeys"
514 echo " module schnorrsig = $enable_module_schnorrsig"
516 echo " asm = $set_asm"
517 echo " bignum = $set_bignum"
518 echo " ecmult window size = $set_ecmult_window"
519 echo " ecmult gen prec. bits = $set_ecmult_gen_precision"
520 dnl Hide test-only options unless they're used.
521 if test x"$set_widemul" != xauto; then
522 echo " wide multiplication = $set_widemul"
525 echo " valgrind = $enable_valgrind"
527 echo " CFLAGS = $CFLAGS"
528 echo " CPPFLAGS = $CPPFLAGS"
529 echo " LDFLAGS = $LDFLAGS"