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$BREW != x; then
40 dnl These Homebrew packages may be keg-only, meaning that they won't be found
41 dnl in expected paths because they may conflict with system files. Ask
42 dnl Homebrew where each one is located, then adjust paths accordingly.
43 openssl_prefix=`$BREW --prefix openssl 2>/dev/null`
44 gmp_prefix=`$BREW --prefix gmp 2>/dev/null`
45 valgrind_prefix=`$BREW --prefix valgrind 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$gmp_prefix/lib"
55 if test x$valgrind_prefix != x; then
56 VALGRIND_CPPFLAGS="-I$valgrind_prefix/include"
59 AC_PATH_PROG([PORT],port,)
60 dnl if homebrew isn't installed and macports is, add the macports default paths
62 if test x$PORT != x; then
63 CPPFLAGS="$CPPFLAGS -isystem /opt/local/include"
64 LDFLAGS="$LDFLAGS -L/opt/local/lib"
73 warn_CFLAGS="-std=c89 -pedantic -Wall -Wextra -Wcast-align -Wnested-externs -Wshadow -Wstrict-prototypes -Wundef -Wno-unused-function -Wno-long-long -Wno-overlength-strings"
74 saved_CFLAGS="$CFLAGS"
75 CFLAGS="$warn_CFLAGS $CFLAGS"
76 AC_MSG_CHECKING([if ${CC} supports ${warn_CFLAGS}])
77 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
78 [ AC_MSG_RESULT([yes]) ],
80 CFLAGS="$saved_CFLAGS"
83 saved_CFLAGS="$CFLAGS"
84 CFLAGS="-fvisibility=hidden $CFLAGS"
85 AC_MSG_CHECKING([if ${CC} supports -fvisibility=hidden])
86 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
87 [ AC_MSG_RESULT([yes]) ],
89 CFLAGS="$saved_CFLAGS"
92 AC_ARG_ENABLE(benchmark,
93 AS_HELP_STRING([--enable-benchmark],[compile benchmark [default=yes]]),
94 [use_benchmark=$enableval],
97 AC_ARG_ENABLE(coverage,
98 AS_HELP_STRING([--enable-coverage],[enable compiler flags to support kcov coverage analysis [default=no]]),
99 [enable_coverage=$enableval],
100 [enable_coverage=no])
103 AS_HELP_STRING([--enable-tests],[compile tests [default=yes]]),
104 [use_tests=$enableval],
107 AC_ARG_ENABLE(openssl_tests,
108 AS_HELP_STRING([--enable-openssl-tests],[enable OpenSSL tests [default=auto]]),
109 [enable_openssl_tests=$enableval],
110 [enable_openssl_tests=auto])
112 AC_ARG_ENABLE(experimental,
113 AS_HELP_STRING([--enable-experimental],[allow experimental configure options [default=no]]),
114 [use_experimental=$enableval],
115 [use_experimental=no])
117 AC_ARG_ENABLE(exhaustive_tests,
118 AS_HELP_STRING([--enable-exhaustive-tests],[compile exhaustive tests [default=yes]]),
119 [use_exhaustive_tests=$enableval],
120 [use_exhaustive_tests=yes])
122 AC_ARG_ENABLE(ecmult_static_precomputation,
123 AS_HELP_STRING([--enable-ecmult-static-precomputation],[enable precomputed ecmult table for signing [default=auto]]),
124 [use_ecmult_static_precomputation=$enableval],
125 [use_ecmult_static_precomputation=auto])
127 AC_ARG_ENABLE(module_ecdh,
128 AS_HELP_STRING([--enable-module-ecdh],[enable ECDH shared secret computation]),
129 [enable_module_ecdh=$enableval],
130 [enable_module_ecdh=no])
132 AC_ARG_ENABLE(module_recovery,
133 AS_HELP_STRING([--enable-module-recovery],[enable ECDSA pubkey recovery module [default=no]]),
134 [enable_module_recovery=$enableval],
135 [enable_module_recovery=no])
137 AC_ARG_ENABLE(module_extrakeys,
138 AS_HELP_STRING([--enable-module-extrakeys],[enable extrakeys module (experimental)]),
139 [enable_module_extrakeys=$enableval],
140 [enable_module_extrakeys=no])
142 AC_ARG_ENABLE(module_schnorrsig,
143 AS_HELP_STRING([--enable-module-schnorrsig],[enable schnorrsig module (experimental)]),
144 [enable_module_schnorrsig=$enableval],
145 [enable_module_schnorrsig=no])
147 AC_ARG_ENABLE(external_default_callbacks,
148 AS_HELP_STRING([--enable-external-default-callbacks],[enable external default callback functions [default=no]]),
149 [use_external_default_callbacks=$enableval],
150 [use_external_default_callbacks=no])
152 dnl Test-only override of the (autodetected by the C code) "widemul" setting.
153 dnl Legal values are int64 (for [u]int64_t), int128 (for [unsigned] __int128), and auto (the default).
154 AC_ARG_WITH([test-override-wide-multiply], [] ,[set_widemul=$withval], [set_widemul=auto])
156 AC_ARG_WITH([bignum], [AS_HELP_STRING([--with-bignum=gmp|no|auto],
157 [bignum implementation to use [default=auto]])],[req_bignum=$withval], [req_bignum=auto])
159 AC_ARG_WITH([asm], [AS_HELP_STRING([--with-asm=x86_64|arm|no|auto],
160 [assembly optimizations to useĀ (experimental: arm) [default=auto]])],[req_asm=$withval], [req_asm=auto])
162 AC_ARG_WITH([ecmult-window], [AS_HELP_STRING([--with-ecmult-window=SIZE|auto],
163 [window size for ecmult precomputation for verification, specified as integer in range [2..24].]
164 [Larger values result in possibly better performance at the cost of an exponentially larger precomputed table.]
165 [The table will store 2^(SIZE-1) * 64 bytes of data but can be larger in memory due to platform-specific padding and alignment.]
166 ["auto" is a reasonable setting for desktop machines (currently 15). [default=auto]]
168 [req_ecmult_window=$withval], [req_ecmult_window=auto])
170 AC_ARG_WITH([ecmult-gen-precision], [AS_HELP_STRING([--with-ecmult-gen-precision=2|4|8|auto],
171 [Precision bits to tune the precomputed table size for signing.]
172 [The size of the table is 32kB for 2 bits, 64kB for 4 bits, 512kB for 8 bits of precision.]
173 [A larger table size usually results in possible faster signing.]
174 ["auto" is a reasonable setting for desktop machines (currently 4). [default=auto]]
176 [req_ecmult_gen_precision=$withval], [req_ecmult_gen_precision=auto])
178 AC_ARG_WITH([valgrind], [AS_HELP_STRING([--with-valgrind=yes|no|auto],
179 [Build with extra checks for running inside Valgrind [default=auto]]
181 [req_valgrind=$withval], [req_valgrind=auto])
183 if test x"$req_valgrind" = x"no"; then
187 if test x"$has_valgrind" != x"yes"; then
188 if test x"$req_valgrind" = x"yes"; then
189 AC_MSG_ERROR([Valgrind support explicitly requested but valgrind/memcheck.h header not available])
196 AM_CONDITIONAL([VALGRIND_ENABLED],[test "$enable_valgrind" = "yes"])
198 if test x"$enable_coverage" = x"yes"; then
199 AC_DEFINE(COVERAGE, 1, [Define this symbol to compile out all VERIFY code])
200 CFLAGS="-O0 --coverage $CFLAGS"
201 LDFLAGS="--coverage $LDFLAGS"
206 if test x"$use_ecmult_static_precomputation" != x"no"; then
207 # Temporarily switch to an environment for the native compiler
208 save_cross_compiling=$cross_compiling
212 SAVE_CFLAGS="$CFLAGS"
213 CFLAGS="$CFLAGS_FOR_BUILD"
214 SAVE_CPPFLAGS="$CPPFLAGS"
215 CPPFLAGS="$CPPFLAGS_FOR_BUILD"
216 SAVE_LDFLAGS="$LDFLAGS"
217 LDFLAGS="$LDFLAGS_FOR_BUILD"
219 warn_CFLAGS_FOR_BUILD="-Wall -Wextra -Wno-unused-function"
220 saved_CFLAGS="$CFLAGS"
221 CFLAGS="$warn_CFLAGS_FOR_BUILD $CFLAGS"
222 AC_MSG_CHECKING([if native ${CC_FOR_BUILD} supports ${warn_CFLAGS_FOR_BUILD}])
223 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
224 [ AC_MSG_RESULT([yes]) ],
225 [ AC_MSG_RESULT([no])
226 CFLAGS="$saved_CFLAGS"
229 AC_MSG_CHECKING([for working native compiler: ${CC_FOR_BUILD}])
231 [AC_LANG_PROGRAM([], [])],
232 [working_native_cc=yes],
233 [working_native_cc=no],[:])
235 CFLAGS_FOR_BUILD="$CFLAGS"
237 # Restore the environment
238 cross_compiling=$save_cross_compiling
240 CFLAGS="$SAVE_CFLAGS"
241 CPPFLAGS="$SAVE_CPPFLAGS"
242 LDFLAGS="$SAVE_LDFLAGS"
244 if test x"$working_native_cc" = x"no"; then
247 m4_define([please_set_for_build], [Please set CC_FOR_BUILD, CFLAGS_FOR_BUILD, CPPFLAGS_FOR_BUILD, and/or LDFLAGS_FOR_BUILD.])
248 if test x"$use_ecmult_static_precomputation" = x"yes"; then
249 AC_MSG_ERROR([native compiler ${CC_FOR_BUILD} does not produce working binaries. please_set_for_build])
251 AC_MSG_WARN([Disabling statically generated ecmult table because the native compiler ${CC_FOR_BUILD} does not produce working binaries. please_set_for_build])
261 if test x"$req_asm" = x"auto"; then
263 if test x"$has_64bit_asm" = x"yes"; then
266 if test x"$set_asm" = x; then
274 if test x"$has_64bit_asm" != x"yes"; then
275 AC_MSG_ERROR([x86_64 assembly optimization requested but not available])
283 AC_MSG_ERROR([invalid assembly optimization selection])
288 if test x"$req_bignum" = x"auto"; then
290 if test x"$has_gmp" = x"yes"; then
294 if test x"$set_bignum" = x; then
298 set_bignum=$req_bignum
302 if test x"$has_gmp" != x"yes"; then
303 AC_MSG_ERROR([gmp bignum explicitly requested but libgmp not available])
309 AC_MSG_ERROR([invalid bignum implementation selection])
314 # select assembly optimization
319 AC_DEFINE(USE_ASM_X86_64, 1, [Define this symbol to enable x86_64 assembly optimizations])
327 AC_MSG_ERROR([invalid assembly optimizations])
331 # select wide multiplication implementation
334 AC_DEFINE(USE_FORCE_WIDEMUL_INT128, 1, [Define this symbol to force the use of the (unsigned) __int128 based wide multiplication implementation])
337 AC_DEFINE(USE_FORCE_WIDEMUL_INT64, 1, [Define this symbol to force the use of the (u)int64_t based wide multiplication implementation])
342 AC_MSG_ERROR([invalid wide multiplication implementation])
346 # select bignum implementation
349 AC_DEFINE(HAVE_LIBGMP, 1, [Define this symbol if libgmp is installed])
350 AC_DEFINE(USE_NUM_GMP, 1, [Define this symbol to use the gmp implementation for num])
351 AC_DEFINE(USE_FIELD_INV_NUM, 1, [Define this symbol to use the num-based field inverse implementation])
352 AC_DEFINE(USE_SCALAR_INV_NUM, 1, [Define this symbol to use the num-based scalar inverse implementation])
355 AC_DEFINE(USE_NUM_NONE, 1, [Define this symbol to use no num implementation])
356 AC_DEFINE(USE_FIELD_INV_BUILTIN, 1, [Define this symbol to use the native field inverse implementation])
357 AC_DEFINE(USE_SCALAR_INV_BUILTIN, 1, [Define this symbol to use the native scalar inverse implementation])
360 AC_MSG_ERROR([invalid bignum implementation])
364 #set ecmult window size
365 if test x"$req_ecmult_window" = x"auto"; then
368 set_ecmult_window=$req_ecmult_window
371 error_window_size=['window size for ecmult precomputation not an integer in range [2..24] or "auto"']
372 case $set_ecmult_window in
375 AC_MSG_ERROR($error_window_size)
378 if test "$set_ecmult_window" -lt 2 -o "$set_ecmult_window" -gt 24 ; then
380 AC_MSG_ERROR($error_window_size)
382 AC_DEFINE_UNQUOTED(ECMULT_WINDOW_SIZE, $set_ecmult_window, [Set window size for ecmult precomputation])
386 #set ecmult gen precision
387 if test x"$req_ecmult_gen_precision" = x"auto"; then
388 set_ecmult_gen_precision=4
390 set_ecmult_gen_precision=$req_ecmult_gen_precision
393 case $set_ecmult_gen_precision in
395 AC_DEFINE_UNQUOTED(ECMULT_GEN_PREC_BITS, $set_ecmult_gen_precision, [Set ecmult gen precision bits])
398 AC_MSG_ERROR(['ecmult gen precision not 2, 4, 8 or "auto"'])
402 if test x"$use_tests" = x"yes"; then
404 if test x"$enable_openssl_tests" != x"no" && test x"$has_openssl_ec" = x"yes"; then
405 enable_openssl_tests=yes
406 AC_DEFINE(ENABLE_OPENSSL_TESTS, 1, [Define this symbol if OpenSSL EC functions are available])
407 SECP_TEST_INCLUDES="$SSL_CFLAGS $CRYPTO_CFLAGS $CRYPTO_CPPFLAGS"
408 SECP_TEST_LIBS="$CRYPTO_LIBS"
412 SECP_TEST_LIBS="$SECP_TEST_LIBS -lgdi32"
416 if test x"$enable_openssl_tests" = x"yes"; then
417 AC_MSG_ERROR([OpenSSL tests requested but OpenSSL with EC support is not available])
419 enable_openssl_tests=no
422 if test x"$enable_openssl_tests" = x"yes"; then
423 AC_MSG_ERROR([OpenSSL tests requested but tests are not enabled])
425 enable_openssl_tests=no
428 if test x"$set_bignum" = x"gmp"; then
429 SECP_LIBS="$SECP_LIBS $GMP_LIBS"
430 SECP_INCLUDES="$SECP_INCLUDES $GMP_CPPFLAGS"
433 if test x"$enable_valgrind" = x"yes"; then
434 SECP_INCLUDES="$SECP_INCLUDES $VALGRIND_CPPFLAGS"
437 if test x"$set_precomp" = x"yes"; then
438 AC_DEFINE(USE_ECMULT_STATIC_PRECOMPUTATION, 1, [Define this symbol to use a statically generated ecmult table])
441 if test x"$enable_module_ecdh" = x"yes"; then
442 AC_DEFINE(ENABLE_MODULE_ECDH, 1, [Define this symbol to enable the ECDH module])
445 if test x"$enable_module_recovery" = x"yes"; then
446 AC_DEFINE(ENABLE_MODULE_RECOVERY, 1, [Define this symbol to enable the ECDSA pubkey recovery module])
449 if test x"$enable_module_schnorrsig" = x"yes"; then
450 AC_DEFINE(ENABLE_MODULE_SCHNORRSIG, 1, [Define this symbol to enable the schnorrsig module])
451 enable_module_extrakeys=yes
454 # Test if extrakeys is set after the schnorrsig module to allow the schnorrsig
455 # module to set enable_module_extrakeys=yes
456 if test x"$enable_module_extrakeys" = x"yes"; then
457 AC_DEFINE(ENABLE_MODULE_EXTRAKEYS, 1, [Define this symbol to enable the extrakeys module])
460 if test x"$use_external_asm" = x"yes"; then
461 AC_DEFINE(USE_EXTERNAL_ASM, 1, [Define this symbol if an external (non-inline) assembly implementation is used])
464 if test x"$use_external_default_callbacks" = x"yes"; then
465 AC_DEFINE(USE_EXTERNAL_DEFAULT_CALLBACKS, 1, [Define this symbol if an external implementation of the default callbacks is used])
468 if test x"$enable_experimental" = x"yes"; then
469 AC_MSG_NOTICE([******])
470 AC_MSG_NOTICE([WARNING: experimental build])
471 AC_MSG_NOTICE([Experimental features do not have stable APIs or properties, and may not be safe for production use.])
472 AC_MSG_NOTICE([Building extrakeys module: $enable_module_extrakeys])
473 AC_MSG_NOTICE([Building schnorrsig module: $enable_module_schnorrsig])
474 AC_MSG_NOTICE([******])
476 if test x"$enable_module_extrakeys" = x"yes"; then
477 AC_MSG_ERROR([extrakeys module is experimental. Use --enable-experimental to allow.])
479 if test x"$enable_module_schnorrsig" = x"yes"; then
480 AC_MSG_ERROR([schnorrsig module is experimental. Use --enable-experimental to allow.])
482 if test x"$set_asm" = x"arm"; then
483 AC_MSG_ERROR([ARM assembly optimization is experimental. Use --enable-experimental to allow.])
487 AC_CONFIG_HEADERS([src/libsecp256k1-config.h])
488 AC_CONFIG_FILES([Makefile libsecp256k1.pc])
489 AC_SUBST(SECP_INCLUDES)
491 AC_SUBST(SECP_TEST_LIBS)
492 AC_SUBST(SECP_TEST_INCLUDES)
493 AM_CONDITIONAL([ENABLE_COVERAGE], [test x"$enable_coverage" = x"yes"])
494 AM_CONDITIONAL([USE_TESTS], [test x"$use_tests" != x"no"])
495 AM_CONDITIONAL([USE_EXHAUSTIVE_TESTS], [test x"$use_exhaustive_tests" != x"no"])
496 AM_CONDITIONAL([USE_BENCHMARK], [test x"$use_benchmark" = x"yes"])
497 AM_CONDITIONAL([USE_ECMULT_STATIC_PRECOMPUTATION], [test x"$set_precomp" = x"yes"])
498 AM_CONDITIONAL([ENABLE_MODULE_ECDH], [test x"$enable_module_ecdh" = x"yes"])
499 AM_CONDITIONAL([ENABLE_MODULE_RECOVERY], [test x"$enable_module_recovery" = x"yes"])
500 AM_CONDITIONAL([ENABLE_MODULE_EXTRAKEYS], [test x"$enable_module_extrakeys" = x"yes"])
501 AM_CONDITIONAL([ENABLE_MODULE_SCHNORRSIG], [test x"$enable_module_schnorrsig" = x"yes"])
502 AM_CONDITIONAL([USE_EXTERNAL_ASM], [test x"$use_external_asm" = x"yes"])
503 AM_CONDITIONAL([USE_ASM_ARM], [test x"$set_asm" = x"arm"])
505 dnl make sure nothing new is exported so that we don't break the cache
506 PKGCONFIG_PATH_TEMP="$PKG_CONFIG_PATH"
507 unset PKG_CONFIG_PATH
508 PKG_CONFIG_PATH="$PKGCONFIG_PATH_TEMP"
513 echo "Build Options:"
514 echo " with ecmult precomp = $set_precomp"
515 echo " with external callbacks = $use_external_default_callbacks"
516 echo " with benchmarks = $use_benchmark"
517 echo " with tests = $use_tests"
518 echo " with openssl tests = $enable_openssl_tests"
519 echo " with coverage = $enable_coverage"
520 echo " module ecdh = $enable_module_ecdh"
521 echo " module recovery = $enable_module_recovery"
522 echo " module extrakeys = $enable_module_extrakeys"
523 echo " module schnorrsig = $enable_module_schnorrsig"
525 echo " asm = $set_asm"
526 echo " bignum = $set_bignum"
527 echo " ecmult window size = $set_ecmult_window"
528 echo " ecmult gen prec. bits = $set_ecmult_gen_precision"
529 dnl Hide test-only options unless they're used.
530 if test x"$set_widemul" != xauto; then
531 echo " wide multiplication = $set_widemul"
534 echo " valgrind = $enable_valgrind"
536 echo " CFLAGS = $CFLAGS"
537 echo " CPPFLAGS = $CPPFLAGS"
538 echo " LDFLAGS = $LDFLAGS"