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 # 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$BREW != x; then
40 # These Homebrew packages may be keg-only, meaning that they won't be found
41 # in expected paths because they may conflict with system files. Ask
42 # Homebrew where each one is located, then adjust paths accordingly.
43 openssl_prefix=`$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$valgrind_prefix/include"
59 AC_PATH_PROG([PORT],port,)
60 # If homebrew isn't installed and macports is, add the macports default paths
62 if test x$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"
93 ### Define config arguments
96 AC_ARG_ENABLE(benchmark,
97 AS_HELP_STRING([--enable-benchmark],[compile benchmark [default=yes]]),
98 [use_benchmark=$enableval],
101 AC_ARG_ENABLE(coverage,
102 AS_HELP_STRING([--enable-coverage],[enable compiler flags to support kcov coverage analysis [default=no]]),
103 [enable_coverage=$enableval],
104 [enable_coverage=no])
107 AS_HELP_STRING([--enable-tests],[compile tests [default=yes]]),
108 [use_tests=$enableval],
111 AC_ARG_ENABLE(openssl_tests,
112 AS_HELP_STRING([--enable-openssl-tests],[enable OpenSSL tests [default=auto]]),
113 [enable_openssl_tests=$enableval],
114 [enable_openssl_tests=auto])
116 AC_ARG_ENABLE(experimental,
117 AS_HELP_STRING([--enable-experimental],[allow experimental configure options [default=no]]),
118 [use_experimental=$enableval],
119 [use_experimental=no])
121 AC_ARG_ENABLE(exhaustive_tests,
122 AS_HELP_STRING([--enable-exhaustive-tests],[compile exhaustive tests [default=yes]]),
123 [use_exhaustive_tests=$enableval],
124 [use_exhaustive_tests=yes])
126 AC_ARG_ENABLE(ecmult_static_precomputation,
127 AS_HELP_STRING([--enable-ecmult-static-precomputation],[enable precomputed ecmult table for signing [default=auto]]),
128 [use_ecmult_static_precomputation=$enableval],
129 [use_ecmult_static_precomputation=auto])
131 AC_ARG_ENABLE(module_ecdh,
132 AS_HELP_STRING([--enable-module-ecdh],[enable ECDH shared secret computation]),
133 [enable_module_ecdh=$enableval],
134 [enable_module_ecdh=no])
136 AC_ARG_ENABLE(module_recovery,
137 AS_HELP_STRING([--enable-module-recovery],[enable ECDSA pubkey recovery module [default=no]]),
138 [enable_module_recovery=$enableval],
139 [enable_module_recovery=no])
141 AC_ARG_ENABLE(module_extrakeys,
142 AS_HELP_STRING([--enable-module-extrakeys],[enable extrakeys module (experimental)]),
143 [enable_module_extrakeys=$enableval],
144 [enable_module_extrakeys=no])
146 AC_ARG_ENABLE(module_schnorrsig,
147 AS_HELP_STRING([--enable-module-schnorrsig],[enable schnorrsig module (experimental)]),
148 [enable_module_schnorrsig=$enableval],
149 [enable_module_schnorrsig=no])
151 AC_ARG_ENABLE(external_default_callbacks,
152 AS_HELP_STRING([--enable-external-default-callbacks],[enable external default callback functions [default=no]]),
153 [use_external_default_callbacks=$enableval],
154 [use_external_default_callbacks=no])
156 # Test-only override of the (autodetected by the C code) "widemul" setting.
157 # Legal values are int64 (for [u]int64_t), int128 (for [unsigned] __int128), and auto (the default).
158 AC_ARG_WITH([test-override-wide-multiply], [] ,[set_widemul=$withval], [set_widemul=auto])
160 AC_ARG_WITH([bignum], [AS_HELP_STRING([--with-bignum=gmp|no|auto],
161 [bignum implementation to use [default=auto]])],[req_bignum=$withval], [req_bignum=auto])
163 AC_ARG_WITH([asm], [AS_HELP_STRING([--with-asm=x86_64|arm|no|auto],
164 [assembly optimizations to useĀ (experimental: arm) [default=auto]])],[req_asm=$withval], [req_asm=auto])
166 AC_ARG_WITH([ecmult-window], [AS_HELP_STRING([--with-ecmult-window=SIZE|auto],
167 [window size for ecmult precomputation for verification, specified as integer in range [2..24].]
168 [Larger values result in possibly better performance at the cost of an exponentially larger precomputed table.]
169 [The table will store 2^(SIZE-1) * 64 bytes of data but can be larger in memory due to platform-specific padding and alignment.]
170 ["auto" is a reasonable setting for desktop machines (currently 15). [default=auto]]
172 [req_ecmult_window=$withval], [req_ecmult_window=auto])
174 AC_ARG_WITH([ecmult-gen-precision], [AS_HELP_STRING([--with-ecmult-gen-precision=2|4|8|auto],
175 [Precision bits to tune the precomputed table size for signing.]
176 [The size of the table is 32kB for 2 bits, 64kB for 4 bits, 512kB for 8 bits of precision.]
177 [A larger table size usually results in possible faster signing.]
178 ["auto" is a reasonable setting for desktop machines (currently 4). [default=auto]]
180 [req_ecmult_gen_precision=$withval], [req_ecmult_gen_precision=auto])
182 AC_ARG_WITH([valgrind], [AS_HELP_STRING([--with-valgrind=yes|no|auto],
183 [Build with extra checks for running inside Valgrind [default=auto]]
185 [req_valgrind=$withval], [req_valgrind=auto])
188 ### Handle config options (except for modules)
191 if test x"$req_valgrind" = x"no"; then
195 if test x"$has_valgrind" != x"yes"; then
196 if test x"$req_valgrind" = x"yes"; then
197 AC_MSG_ERROR([Valgrind support explicitly requested but valgrind/memcheck.h header not available])
204 AM_CONDITIONAL([VALGRIND_ENABLED],[test "$enable_valgrind" = "yes"])
206 if test x"$enable_coverage" = x"yes"; then
207 AC_DEFINE(COVERAGE, 1, [Define this symbol to compile out all VERIFY code])
208 CFLAGS="-O0 --coverage $CFLAGS"
209 LDFLAGS="--coverage $LDFLAGS"
214 if test x"$req_asm" = x"auto"; then
216 if test x"$has_64bit_asm" = x"yes"; then
219 if test x"$set_asm" = x; then
227 if test x"$has_64bit_asm" != x"yes"; then
228 AC_MSG_ERROR([x86_64 assembly optimization requested but not available])
236 AC_MSG_ERROR([invalid assembly optimization selection])
241 if test x"$req_bignum" = x"auto"; then
243 if test x"$has_gmp" = x"yes"; then
247 if test x"$set_bignum" = x; then
251 set_bignum=$req_bignum
255 if test x"$has_gmp" != x"yes"; then
256 AC_MSG_ERROR([gmp bignum explicitly requested but libgmp not available])
262 AC_MSG_ERROR([invalid bignum implementation selection])
267 # Select assembly optimization
272 AC_DEFINE(USE_ASM_X86_64, 1, [Define this symbol to enable x86_64 assembly optimizations])
280 AC_MSG_ERROR([invalid assembly optimizations])
284 if test x"$use_external_asm" = x"yes"; then
285 AC_DEFINE(USE_EXTERNAL_ASM, 1, [Define this symbol if an external (non-inline) assembly implementation is used])
289 # Select wide multiplication implementation
292 AC_DEFINE(USE_FORCE_WIDEMUL_INT128, 1, [Define this symbol to force the use of the (unsigned) __int128 based wide multiplication implementation])
295 AC_DEFINE(USE_FORCE_WIDEMUL_INT64, 1, [Define this symbol to force the use of the (u)int64_t based wide multiplication implementation])
300 AC_MSG_ERROR([invalid wide multiplication implementation])
304 # Select bignum implementation
307 AC_DEFINE(HAVE_LIBGMP, 1, [Define this symbol if libgmp is installed])
308 AC_DEFINE(USE_NUM_GMP, 1, [Define this symbol to use the gmp implementation for num])
309 AC_DEFINE(USE_FIELD_INV_NUM, 1, [Define this symbol to use the num-based field inverse implementation])
310 AC_DEFINE(USE_SCALAR_INV_NUM, 1, [Define this symbol to use the num-based scalar inverse implementation])
313 AC_DEFINE(USE_NUM_NONE, 1, [Define this symbol to use no num implementation])
314 AC_DEFINE(USE_FIELD_INV_BUILTIN, 1, [Define this symbol to use the native field inverse implementation])
315 AC_DEFINE(USE_SCALAR_INV_BUILTIN, 1, [Define this symbol to use the native scalar inverse implementation])
318 AC_MSG_ERROR([invalid bignum implementation])
322 # Set ecmult window size
323 if test x"$req_ecmult_window" = x"auto"; then
326 set_ecmult_window=$req_ecmult_window
329 error_window_size=['window size for ecmult precomputation not an integer in range [2..24] or "auto"']
330 case $set_ecmult_window in
333 AC_MSG_ERROR($error_window_size)
336 if test "$set_ecmult_window" -lt 2 -o "$set_ecmult_window" -gt 24 ; then
338 AC_MSG_ERROR($error_window_size)
340 AC_DEFINE_UNQUOTED(ECMULT_WINDOW_SIZE, $set_ecmult_window, [Set window size for ecmult precomputation])
344 # Set ecmult gen precision
345 if test x"$req_ecmult_gen_precision" = x"auto"; then
346 set_ecmult_gen_precision=4
348 set_ecmult_gen_precision=$req_ecmult_gen_precision
351 case $set_ecmult_gen_precision in
353 AC_DEFINE_UNQUOTED(ECMULT_GEN_PREC_BITS, $set_ecmult_gen_precision, [Set ecmult gen precision bits])
356 AC_MSG_ERROR(['ecmult gen precision not 2, 4, 8 or "auto"'])
360 if test x"$use_tests" = x"yes"; then
362 if test x"$enable_openssl_tests" != x"no" && test x"$has_openssl_ec" = x"yes"; then
363 enable_openssl_tests=yes
364 AC_DEFINE(ENABLE_OPENSSL_TESTS, 1, [Define this symbol if OpenSSL EC functions are available])
365 SECP_TEST_INCLUDES="$SSL_CFLAGS $CRYPTO_CFLAGS $CRYPTO_CPPFLAGS"
366 SECP_TEST_LIBS="$CRYPTO_LIBS"
370 SECP_TEST_LIBS="$SECP_TEST_LIBS -lgdi32"
374 if test x"$enable_openssl_tests" = x"yes"; then
375 AC_MSG_ERROR([OpenSSL tests requested but OpenSSL with EC support is not available])
377 enable_openssl_tests=no
380 if test x"$enable_openssl_tests" = x"yes"; then
381 AC_MSG_ERROR([OpenSSL tests requested but tests are not enabled])
383 enable_openssl_tests=no
386 if test x"$set_bignum" = x"gmp"; then
387 SECP_LIBS="$SECP_LIBS $GMP_LIBS"
388 SECP_INCLUDES="$SECP_INCLUDES $GMP_CPPFLAGS"
391 if test x"$enable_valgrind" = x"yes"; then
392 SECP_INCLUDES="$SECP_INCLUDES $VALGRIND_CPPFLAGS"
395 # Handle static precomputation (after everything which modifies CFLAGS and friends)
396 if test x"$use_ecmult_static_precomputation" != x"no"; then
397 # Temporarily switch to an environment for the native compiler
398 save_cross_compiling=$cross_compiling
402 SAVE_CFLAGS="$CFLAGS"
403 CFLAGS="$CFLAGS_FOR_BUILD"
404 SAVE_CPPFLAGS="$CPPFLAGS"
405 CPPFLAGS="$CPPFLAGS_FOR_BUILD"
406 SAVE_LDFLAGS="$LDFLAGS"
407 LDFLAGS="$LDFLAGS_FOR_BUILD"
409 warn_CFLAGS_FOR_BUILD="-Wall -Wextra -Wno-unused-function"
410 saved_CFLAGS="$CFLAGS"
411 CFLAGS="$warn_CFLAGS_FOR_BUILD $CFLAGS"
412 AC_MSG_CHECKING([if native ${CC_FOR_BUILD} supports ${warn_CFLAGS_FOR_BUILD}])
413 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
414 [ AC_MSG_RESULT([yes]) ],
415 [ AC_MSG_RESULT([no])
416 CFLAGS="$saved_CFLAGS"
419 AC_MSG_CHECKING([for working native compiler: ${CC_FOR_BUILD}])
421 [AC_LANG_PROGRAM([], [])],
422 [working_native_cc=yes],
423 [working_native_cc=no],[:])
425 CFLAGS_FOR_BUILD="$CFLAGS"
427 # Restore the environment
428 cross_compiling=$save_cross_compiling
430 CFLAGS="$SAVE_CFLAGS"
431 CPPFLAGS="$SAVE_CPPFLAGS"
432 LDFLAGS="$SAVE_LDFLAGS"
434 if test x"$working_native_cc" = x"no"; then
437 m4_define([please_set_for_build], [Please set CC_FOR_BUILD, CFLAGS_FOR_BUILD, CPPFLAGS_FOR_BUILD, and/or LDFLAGS_FOR_BUILD.])
438 if test x"$use_ecmult_static_precomputation" = x"yes"; then
439 AC_MSG_ERROR([native compiler ${CC_FOR_BUILD} does not produce working binaries. please_set_for_build])
441 AC_MSG_WARN([Disabling statically generated ecmult table because the native compiler ${CC_FOR_BUILD} does not produce working binaries. please_set_for_build])
451 if test x"$set_precomp" = x"yes"; then
452 AC_DEFINE(USE_ECMULT_STATIC_PRECOMPUTATION, 1, [Define this symbol to use a statically generated ecmult table])
456 ### Handle module options
459 if test x"$enable_module_ecdh" = x"yes"; then
460 AC_DEFINE(ENABLE_MODULE_ECDH, 1, [Define this symbol to enable the ECDH module])
463 if test x"$enable_module_recovery" = x"yes"; then
464 AC_DEFINE(ENABLE_MODULE_RECOVERY, 1, [Define this symbol to enable the ECDSA pubkey recovery module])
467 if test x"$enable_module_schnorrsig" = x"yes"; then
468 AC_DEFINE(ENABLE_MODULE_SCHNORRSIG, 1, [Define this symbol to enable the schnorrsig module])
469 enable_module_extrakeys=yes
472 # Test if extrakeys is set after the schnorrsig module to allow the schnorrsig
473 # module to set enable_module_extrakeys=yes
474 if test x"$enable_module_extrakeys" = x"yes"; then
475 AC_DEFINE(ENABLE_MODULE_EXTRAKEYS, 1, [Define this symbol to enable the extrakeys module])
478 if test x"$use_external_default_callbacks" = x"yes"; then
479 AC_DEFINE(USE_EXTERNAL_DEFAULT_CALLBACKS, 1, [Define this symbol if an external implementation of the default callbacks is used])
483 ### Check for --enable-experimental if necessary
486 if test x"$enable_experimental" = x"yes"; then
487 AC_MSG_NOTICE([******])
488 AC_MSG_NOTICE([WARNING: experimental build])
489 AC_MSG_NOTICE([Experimental features do not have stable APIs or properties, and may not be safe for production use.])
490 AC_MSG_NOTICE([Building extrakeys module: $enable_module_extrakeys])
491 AC_MSG_NOTICE([Building schnorrsig module: $enable_module_schnorrsig])
492 AC_MSG_NOTICE([******])
494 if test x"$enable_module_extrakeys" = x"yes"; then
495 AC_MSG_ERROR([extrakeys module is experimental. Use --enable-experimental to allow.])
497 if test x"$enable_module_schnorrsig" = x"yes"; then
498 AC_MSG_ERROR([schnorrsig module is experimental. Use --enable-experimental to allow.])
500 if test x"$set_asm" = x"arm"; then
501 AC_MSG_ERROR([ARM assembly optimization is experimental. Use --enable-experimental to allow.])
509 AC_CONFIG_HEADERS([src/libsecp256k1-config.h])
510 AC_CONFIG_FILES([Makefile libsecp256k1.pc])
511 AC_SUBST(SECP_INCLUDES)
513 AC_SUBST(SECP_TEST_LIBS)
514 AC_SUBST(SECP_TEST_INCLUDES)
515 AM_CONDITIONAL([ENABLE_COVERAGE], [test x"$enable_coverage" = x"yes"])
516 AM_CONDITIONAL([USE_TESTS], [test x"$use_tests" != x"no"])
517 AM_CONDITIONAL([USE_EXHAUSTIVE_TESTS], [test x"$use_exhaustive_tests" != x"no"])
518 AM_CONDITIONAL([USE_BENCHMARK], [test x"$use_benchmark" = x"yes"])
519 AM_CONDITIONAL([USE_ECMULT_STATIC_PRECOMPUTATION], [test x"$set_precomp" = x"yes"])
520 AM_CONDITIONAL([ENABLE_MODULE_ECDH], [test x"$enable_module_ecdh" = x"yes"])
521 AM_CONDITIONAL([ENABLE_MODULE_RECOVERY], [test x"$enable_module_recovery" = x"yes"])
522 AM_CONDITIONAL([ENABLE_MODULE_EXTRAKEYS], [test x"$enable_module_extrakeys" = x"yes"])
523 AM_CONDITIONAL([ENABLE_MODULE_SCHNORRSIG], [test x"$enable_module_schnorrsig" = x"yes"])
524 AM_CONDITIONAL([USE_EXTERNAL_ASM], [test x"$use_external_asm" = x"yes"])
525 AM_CONDITIONAL([USE_ASM_ARM], [test x"$set_asm" = x"arm"])
527 # Make sure nothing new is exported so that we don't break the cache.
528 PKGCONFIG_PATH_TEMP="$PKG_CONFIG_PATH"
529 unset PKG_CONFIG_PATH
530 PKG_CONFIG_PATH="$PKGCONFIG_PATH_TEMP"
535 echo "Build Options:"
536 echo " with ecmult precomp = $set_precomp"
537 echo " with external callbacks = $use_external_default_callbacks"
538 echo " with benchmarks = $use_benchmark"
539 echo " with tests = $use_tests"
540 echo " with openssl tests = $enable_openssl_tests"
541 echo " with coverage = $enable_coverage"
542 echo " module ecdh = $enable_module_ecdh"
543 echo " module recovery = $enable_module_recovery"
544 echo " module extrakeys = $enable_module_extrakeys"
545 echo " module schnorrsig = $enable_module_schnorrsig"
547 echo " asm = $set_asm"
548 echo " bignum = $set_bignum"
549 echo " ecmult window size = $set_ecmult_window"
550 echo " ecmult gen prec. bits = $set_ecmult_gen_precision"
551 # Hide test-only options unless they're used.
552 if test x"$set_widemul" != xauto; then
553 echo " wide multiplication = $set_widemul"
556 echo " valgrind = $enable_valgrind"
558 echo " CFLAGS = $CFLAGS"
559 echo " CPPFLAGS = $CPPFLAGS"
560 echo " LDFLAGS = $LDFLAGS"