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)
29 if test x"$ac_cv_prog_cc_c89" = x"no"; then
30 AC_MSG_ERROR([c89 compiler support required])
36 if test x$cross_compiling != xyes; then
37 AC_PATH_PROG([BREW],brew,)
38 if test x$BREW != x; then
39 # These Homebrew packages may be keg-only, meaning that they won't be found
40 # in expected paths because they may conflict with system files. Ask
41 # Homebrew where each one is located, then adjust paths accordingly.
42 openssl_prefix=`$BREW --prefix openssl 2>/dev/null`
43 gmp_prefix=`$BREW --prefix gmp 2>/dev/null`
44 valgrind_prefix=`$BREW --prefix valgrind 2>/dev/null`
45 if test x$openssl_prefix != x; then
46 PKG_CONFIG_PATH="$openssl_prefix/lib/pkgconfig:$PKG_CONFIG_PATH"
47 export PKG_CONFIG_PATH
48 CRYPTO_CPPFLAGS="-I$openssl_prefix/include"
50 if test x$gmp_prefix != x; then
51 GMP_CPPFLAGS="-I$gmp_prefix/include"
52 GMP_LIBS="-L$gmp_prefix/lib"
54 if test x$valgrind_prefix != x; then
55 VALGRIND_CPPFLAGS="-I$valgrind_prefix/include"
58 AC_PATH_PROG([PORT],port,)
59 # If homebrew isn't installed and macports is, add the macports default paths
61 if test x$PORT != x; then
62 CPPFLAGS="$CPPFLAGS -isystem /opt/local/include"
63 LDFLAGS="$LDFLAGS -L/opt/local/lib"
72 warn_CFLAGS="-std=c89 -pedantic -Wall -Wextra -Wcast-align -Wnested-externs -Wshadow -Wstrict-prototypes -Wundef -Wno-unused-function -Wno-long-long -Wno-overlength-strings"
73 saved_CFLAGS="$CFLAGS"
74 CFLAGS="$warn_CFLAGS $CFLAGS"
75 AC_MSG_CHECKING([if ${CC} supports ${warn_CFLAGS}])
76 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
77 [ AC_MSG_RESULT([yes]) ],
79 CFLAGS="$saved_CFLAGS"
82 saved_CFLAGS="$CFLAGS"
83 CFLAGS="-Wconditional-uninitialized $CFLAGS"
84 AC_MSG_CHECKING([if ${CC} supports -Wconditional-uninitialized])
85 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
86 [ AC_MSG_RESULT([yes]) ],
88 CFLAGS="$saved_CFLAGS"
91 saved_CFLAGS="$CFLAGS"
92 CFLAGS="-fvisibility=hidden $CFLAGS"
93 AC_MSG_CHECKING([if ${CC} supports -fvisibility=hidden])
94 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
95 [ AC_MSG_RESULT([yes]) ],
97 CFLAGS="$saved_CFLAGS"
101 ### Define config arguments
104 AC_ARG_ENABLE(benchmark,
105 AS_HELP_STRING([--enable-benchmark],[compile benchmark [default=yes]]),
106 [use_benchmark=$enableval],
109 AC_ARG_ENABLE(coverage,
110 AS_HELP_STRING([--enable-coverage],[enable compiler flags to support kcov coverage analysis [default=no]]),
111 [enable_coverage=$enableval],
112 [enable_coverage=no])
115 AS_HELP_STRING([--enable-tests],[compile tests [default=yes]]),
116 [use_tests=$enableval],
119 AC_ARG_ENABLE(openssl_tests,
120 AS_HELP_STRING([--enable-openssl-tests],[enable OpenSSL tests [default=auto]]),
121 [enable_openssl_tests=$enableval],
122 [enable_openssl_tests=auto])
124 AC_ARG_ENABLE(experimental,
125 AS_HELP_STRING([--enable-experimental],[allow experimental configure options [default=no]]),
126 [use_experimental=$enableval],
127 [use_experimental=no])
129 AC_ARG_ENABLE(exhaustive_tests,
130 AS_HELP_STRING([--enable-exhaustive-tests],[compile exhaustive tests [default=yes]]),
131 [use_exhaustive_tests=$enableval],
132 [use_exhaustive_tests=yes])
134 AC_ARG_ENABLE(ecmult_static_precomputation,
135 AS_HELP_STRING([--enable-ecmult-static-precomputation],[enable precomputed ecmult table for signing [default=auto]]),
136 [use_ecmult_static_precomputation=$enableval],
137 [use_ecmult_static_precomputation=auto])
139 AC_ARG_ENABLE(module_ecdh,
140 AS_HELP_STRING([--enable-module-ecdh],[enable ECDH shared secret computation]),
141 [enable_module_ecdh=$enableval],
142 [enable_module_ecdh=no])
144 AC_ARG_ENABLE(module_recovery,
145 AS_HELP_STRING([--enable-module-recovery],[enable ECDSA pubkey recovery module [default=no]]),
146 [enable_module_recovery=$enableval],
147 [enable_module_recovery=no])
149 AC_ARG_ENABLE(module_extrakeys,
150 AS_HELP_STRING([--enable-module-extrakeys],[enable extrakeys module (experimental)]),
151 [enable_module_extrakeys=$enableval],
152 [enable_module_extrakeys=no])
154 AC_ARG_ENABLE(module_schnorrsig,
155 AS_HELP_STRING([--enable-module-schnorrsig],[enable schnorrsig module (experimental)]),
156 [enable_module_schnorrsig=$enableval],
157 [enable_module_schnorrsig=no])
159 AC_ARG_ENABLE(external_default_callbacks,
160 AS_HELP_STRING([--enable-external-default-callbacks],[enable external default callback functions [default=no]]),
161 [use_external_default_callbacks=$enableval],
162 [use_external_default_callbacks=no])
164 # Test-only override of the (autodetected by the C code) "widemul" setting.
165 # Legal values are int64 (for [u]int64_t), int128 (for [unsigned] __int128), and auto (the default).
166 AC_ARG_WITH([test-override-wide-multiply], [] ,[set_widemul=$withval], [set_widemul=auto])
168 AC_ARG_WITH([bignum], [AS_HELP_STRING([--with-bignum=gmp|no|auto],
169 [bignum implementation to use [default=auto]])],[req_bignum=$withval], [req_bignum=auto])
171 AC_ARG_WITH([asm], [AS_HELP_STRING([--with-asm=x86_64|arm|no|auto],
172 [assembly optimizations to useĀ (experimental: arm) [default=auto]])],[req_asm=$withval], [req_asm=auto])
174 AC_ARG_WITH([ecmult-window], [AS_HELP_STRING([--with-ecmult-window=SIZE|auto],
175 [window size for ecmult precomputation for verification, specified as integer in range [2..24].]
176 [Larger values result in possibly better performance at the cost of an exponentially larger precomputed table.]
177 [The table will store 2^(SIZE-1) * 64 bytes of data but can be larger in memory due to platform-specific padding and alignment.]
178 ["auto" is a reasonable setting for desktop machines (currently 15). [default=auto]]
180 [req_ecmult_window=$withval], [req_ecmult_window=auto])
182 AC_ARG_WITH([ecmult-gen-precision], [AS_HELP_STRING([--with-ecmult-gen-precision=2|4|8|auto],
183 [Precision bits to tune the precomputed table size for signing.]
184 [The size of the table is 32kB for 2 bits, 64kB for 4 bits, 512kB for 8 bits of precision.]
185 [A larger table size usually results in possible faster signing.]
186 ["auto" is a reasonable setting for desktop machines (currently 4). [default=auto]]
188 [req_ecmult_gen_precision=$withval], [req_ecmult_gen_precision=auto])
190 AC_ARG_WITH([valgrind], [AS_HELP_STRING([--with-valgrind=yes|no|auto],
191 [Build with extra checks for running inside Valgrind [default=auto]]
193 [req_valgrind=$withval], [req_valgrind=auto])
196 ### Handle config options (except for modules)
199 if test x"$req_valgrind" = x"no"; then
203 if test x"$has_valgrind" != x"yes"; then
204 if test x"$req_valgrind" = x"yes"; then
205 AC_MSG_ERROR([Valgrind support explicitly requested but valgrind/memcheck.h header not available])
212 AM_CONDITIONAL([VALGRIND_ENABLED],[test "$enable_valgrind" = "yes"])
214 if test x"$enable_coverage" = x"yes"; then
215 AC_DEFINE(COVERAGE, 1, [Define this symbol to compile out all VERIFY code])
216 CFLAGS="-O0 --coverage $CFLAGS"
217 LDFLAGS="--coverage $LDFLAGS"
222 if test x"$req_asm" = x"auto"; then
224 if test x"$has_64bit_asm" = x"yes"; then
227 if test x"$set_asm" = x; then
235 if test x"$has_64bit_asm" != x"yes"; then
236 AC_MSG_ERROR([x86_64 assembly optimization requested but not available])
244 AC_MSG_ERROR([invalid assembly optimization selection])
249 if test x"$req_bignum" = x"auto"; then
251 if test x"$has_gmp" = x"yes"; then
255 if test x"$set_bignum" = x; then
259 set_bignum=$req_bignum
263 if test x"$has_gmp" != x"yes"; then
264 AC_MSG_ERROR([gmp bignum explicitly requested but libgmp not available])
270 AC_MSG_ERROR([invalid bignum implementation selection])
275 # Select assembly optimization
280 AC_DEFINE(USE_ASM_X86_64, 1, [Define this symbol to enable x86_64 assembly optimizations])
288 AC_MSG_ERROR([invalid assembly optimizations])
292 if test x"$use_external_asm" = x"yes"; then
293 AC_DEFINE(USE_EXTERNAL_ASM, 1, [Define this symbol if an external (non-inline) assembly implementation is used])
297 # Select wide multiplication implementation
300 AC_DEFINE(USE_FORCE_WIDEMUL_INT128, 1, [Define this symbol to force the use of the (unsigned) __int128 based wide multiplication implementation])
303 AC_DEFINE(USE_FORCE_WIDEMUL_INT64, 1, [Define this symbol to force the use of the (u)int64_t based wide multiplication implementation])
308 AC_MSG_ERROR([invalid wide multiplication implementation])
312 # Select bignum implementation
315 AC_DEFINE(HAVE_LIBGMP, 1, [Define this symbol if libgmp is installed])
316 AC_DEFINE(USE_NUM_GMP, 1, [Define this symbol to use the gmp implementation for num])
317 AC_DEFINE(USE_FIELD_INV_NUM, 1, [Define this symbol to use the num-based field inverse implementation])
318 AC_DEFINE(USE_SCALAR_INV_NUM, 1, [Define this symbol to use the num-based scalar inverse implementation])
321 AC_DEFINE(USE_NUM_NONE, 1, [Define this symbol to use no num implementation])
322 AC_DEFINE(USE_FIELD_INV_BUILTIN, 1, [Define this symbol to use the native field inverse implementation])
323 AC_DEFINE(USE_SCALAR_INV_BUILTIN, 1, [Define this symbol to use the native scalar inverse implementation])
326 AC_MSG_ERROR([invalid bignum implementation])
330 # Set ecmult window size
331 if test x"$req_ecmult_window" = x"auto"; then
334 set_ecmult_window=$req_ecmult_window
337 error_window_size=['window size for ecmult precomputation not an integer in range [2..24] or "auto"']
338 case $set_ecmult_window in
341 AC_MSG_ERROR($error_window_size)
344 if test "$set_ecmult_window" -lt 2 -o "$set_ecmult_window" -gt 24 ; then
346 AC_MSG_ERROR($error_window_size)
348 AC_DEFINE_UNQUOTED(ECMULT_WINDOW_SIZE, $set_ecmult_window, [Set window size for ecmult precomputation])
352 # Set ecmult gen precision
353 if test x"$req_ecmult_gen_precision" = x"auto"; then
354 set_ecmult_gen_precision=4
356 set_ecmult_gen_precision=$req_ecmult_gen_precision
359 case $set_ecmult_gen_precision in
361 AC_DEFINE_UNQUOTED(ECMULT_GEN_PREC_BITS, $set_ecmult_gen_precision, [Set ecmult gen precision bits])
364 AC_MSG_ERROR(['ecmult gen precision not 2, 4, 8 or "auto"'])
368 if test x"$use_tests" = x"yes"; then
370 if test x"$enable_openssl_tests" != x"no" && test x"$has_openssl_ec" = x"yes"; then
371 enable_openssl_tests=yes
372 AC_DEFINE(ENABLE_OPENSSL_TESTS, 1, [Define this symbol if OpenSSL EC functions are available])
373 SECP_TEST_INCLUDES="$SSL_CFLAGS $CRYPTO_CFLAGS $CRYPTO_CPPFLAGS"
374 SECP_TEST_LIBS="$CRYPTO_LIBS"
378 SECP_TEST_LIBS="$SECP_TEST_LIBS -lgdi32"
382 if test x"$enable_openssl_tests" = x"yes"; then
383 AC_MSG_ERROR([OpenSSL tests requested but OpenSSL with EC support is not available])
385 enable_openssl_tests=no
388 if test x"$enable_openssl_tests" = x"yes"; then
389 AC_MSG_ERROR([OpenSSL tests requested but tests are not enabled])
391 enable_openssl_tests=no
394 if test x"$set_bignum" = x"gmp"; then
395 SECP_LIBS="$SECP_LIBS $GMP_LIBS"
396 SECP_INCLUDES="$SECP_INCLUDES $GMP_CPPFLAGS"
399 if test x"$enable_valgrind" = x"yes"; then
400 SECP_INCLUDES="$SECP_INCLUDES $VALGRIND_CPPFLAGS"
403 # Handle static precomputation (after everything which modifies CFLAGS and friends)
404 if test x"$use_ecmult_static_precomputation" != x"no"; then
405 if test x"$cross_compiling" = x"no"; then
407 if test x"${CC_FOR_BUILD+x}${CFLAGS_FOR_BUILD+x}${CPPFLAGS_FOR_BUILD+x}${LDFLAGS_FOR_BUILD+x}" != x; then
408 AC_MSG_WARN([CC_FOR_BUILD, CFLAGS_FOR_BUILD, CPPFLAGS_FOR_BUILD, and/or LDFLAGS_FOR_BUILD is set but ignored because we are not cross-compiling.])
410 # If we're not cross-compiling, simply use the same compiler for building the static precompation code.
412 CFLAGS_FOR_BUILD="$CFLAGS"
413 CPPFLAGS_FOR_BUILD="$CPPFLAGS"
414 LDFLAGS_FOR_BUILD="$LDFLAGS"
418 # Temporarily switch to an environment for the native compiler
419 save_cross_compiling=$cross_compiling
423 SAVE_CFLAGS="$CFLAGS"
424 CFLAGS="$CFLAGS_FOR_BUILD"
425 SAVE_CPPFLAGS="$CPPFLAGS"
426 CPPFLAGS="$CPPFLAGS_FOR_BUILD"
427 SAVE_LDFLAGS="$LDFLAGS"
428 LDFLAGS="$LDFLAGS_FOR_BUILD"
430 warn_CFLAGS_FOR_BUILD="-Wall -Wextra -Wno-unused-function"
431 saved_CFLAGS="$CFLAGS"
432 CFLAGS="$warn_CFLAGS_FOR_BUILD $CFLAGS"
433 AC_MSG_CHECKING([if native ${CC_FOR_BUILD} supports ${warn_CFLAGS_FOR_BUILD}])
434 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
435 [ AC_MSG_RESULT([yes]) ],
436 [ AC_MSG_RESULT([no])
437 CFLAGS="$saved_CFLAGS"
440 AC_MSG_CHECKING([for working native compiler: ${CC_FOR_BUILD}])
442 [AC_LANG_PROGRAM([], [])],
443 [working_native_cc=yes],
444 [working_native_cc=no],[:])
446 CFLAGS_FOR_BUILD="$CFLAGS"
448 # Restore the environment
449 cross_compiling=$save_cross_compiling
451 CFLAGS="$SAVE_CFLAGS"
452 CPPFLAGS="$SAVE_CPPFLAGS"
453 LDFLAGS="$SAVE_LDFLAGS"
455 if test x"$working_native_cc" = x"no"; then
458 m4_define([please_set_for_build], [Please set CC_FOR_BUILD, CFLAGS_FOR_BUILD, CPPFLAGS_FOR_BUILD, and/or LDFLAGS_FOR_BUILD.])
459 if test x"$use_ecmult_static_precomputation" = x"yes"; then
460 AC_MSG_ERROR([native compiler ${CC_FOR_BUILD} does not produce working binaries. please_set_for_build])
462 AC_MSG_WARN([Disabling statically generated ecmult table because the native compiler ${CC_FOR_BUILD} does not produce working binaries. please_set_for_build])
470 AC_SUBST(CC_FOR_BUILD)
471 AC_SUBST(CFLAGS_FOR_BUILD)
472 AC_SUBST(CPPFLAGS_FOR_BUILD)
473 AC_SUBST(LDFLAGS_FOR_BUILD)
478 if test x"$set_precomp" = x"yes"; then
479 AC_DEFINE(USE_ECMULT_STATIC_PRECOMPUTATION, 1, [Define this symbol to use a statically generated ecmult table])
483 ### Handle module options
486 if test x"$enable_module_ecdh" = x"yes"; then
487 AC_DEFINE(ENABLE_MODULE_ECDH, 1, [Define this symbol to enable the ECDH module])
490 if test x"$enable_module_recovery" = x"yes"; then
491 AC_DEFINE(ENABLE_MODULE_RECOVERY, 1, [Define this symbol to enable the ECDSA pubkey recovery module])
494 if test x"$enable_module_schnorrsig" = x"yes"; then
495 AC_DEFINE(ENABLE_MODULE_SCHNORRSIG, 1, [Define this symbol to enable the schnorrsig module])
496 enable_module_extrakeys=yes
499 # Test if extrakeys is set after the schnorrsig module to allow the schnorrsig
500 # module to set enable_module_extrakeys=yes
501 if test x"$enable_module_extrakeys" = x"yes"; then
502 AC_DEFINE(ENABLE_MODULE_EXTRAKEYS, 1, [Define this symbol to enable the extrakeys module])
505 if test x"$use_external_default_callbacks" = x"yes"; then
506 AC_DEFINE(USE_EXTERNAL_DEFAULT_CALLBACKS, 1, [Define this symbol if an external implementation of the default callbacks is used])
510 ### Check for --enable-experimental if necessary
513 if test x"$enable_experimental" = x"yes"; then
514 AC_MSG_NOTICE([******])
515 AC_MSG_NOTICE([WARNING: experimental build])
516 AC_MSG_NOTICE([Experimental features do not have stable APIs or properties, and may not be safe for production use.])
517 AC_MSG_NOTICE([Building extrakeys module: $enable_module_extrakeys])
518 AC_MSG_NOTICE([Building schnorrsig module: $enable_module_schnorrsig])
519 AC_MSG_NOTICE([******])
521 if test x"$enable_module_extrakeys" = x"yes"; then
522 AC_MSG_ERROR([extrakeys module is experimental. Use --enable-experimental to allow.])
524 if test x"$enable_module_schnorrsig" = x"yes"; then
525 AC_MSG_ERROR([schnorrsig module is experimental. Use --enable-experimental to allow.])
527 if test x"$set_asm" = x"arm"; then
528 AC_MSG_ERROR([ARM assembly optimization is experimental. Use --enable-experimental to allow.])
536 AC_CONFIG_HEADERS([src/libsecp256k1-config.h])
537 AC_CONFIG_FILES([Makefile libsecp256k1.pc])
538 AC_SUBST(SECP_INCLUDES)
540 AC_SUBST(SECP_TEST_LIBS)
541 AC_SUBST(SECP_TEST_INCLUDES)
542 AM_CONDITIONAL([ENABLE_COVERAGE], [test x"$enable_coverage" = x"yes"])
543 AM_CONDITIONAL([USE_TESTS], [test x"$use_tests" != x"no"])
544 AM_CONDITIONAL([USE_EXHAUSTIVE_TESTS], [test x"$use_exhaustive_tests" != x"no"])
545 AM_CONDITIONAL([USE_BENCHMARK], [test x"$use_benchmark" = x"yes"])
546 AM_CONDITIONAL([USE_ECMULT_STATIC_PRECOMPUTATION], [test x"$set_precomp" = x"yes"])
547 AM_CONDITIONAL([ENABLE_MODULE_ECDH], [test x"$enable_module_ecdh" = x"yes"])
548 AM_CONDITIONAL([ENABLE_MODULE_RECOVERY], [test x"$enable_module_recovery" = x"yes"])
549 AM_CONDITIONAL([ENABLE_MODULE_EXTRAKEYS], [test x"$enable_module_extrakeys" = x"yes"])
550 AM_CONDITIONAL([ENABLE_MODULE_SCHNORRSIG], [test x"$enable_module_schnorrsig" = x"yes"])
551 AM_CONDITIONAL([USE_EXTERNAL_ASM], [test x"$use_external_asm" = x"yes"])
552 AM_CONDITIONAL([USE_ASM_ARM], [test x"$set_asm" = x"arm"])
554 # Make sure nothing new is exported so that we don't break the cache.
555 PKGCONFIG_PATH_TEMP="$PKG_CONFIG_PATH"
556 unset PKG_CONFIG_PATH
557 PKG_CONFIG_PATH="$PKGCONFIG_PATH_TEMP"
562 echo "Build Options:"
563 echo " with ecmult precomp = $set_precomp"
564 echo " with external callbacks = $use_external_default_callbacks"
565 echo " with benchmarks = $use_benchmark"
566 echo " with tests = $use_tests"
567 echo " with openssl tests = $enable_openssl_tests"
568 echo " with coverage = $enable_coverage"
569 echo " module ecdh = $enable_module_ecdh"
570 echo " module recovery = $enable_module_recovery"
571 echo " module extrakeys = $enable_module_extrakeys"
572 echo " module schnorrsig = $enable_module_schnorrsig"
574 echo " asm = $set_asm"
575 echo " bignum = $set_bignum"
576 echo " ecmult window size = $set_ecmult_window"
577 echo " ecmult gen prec. bits = $set_ecmult_gen_precision"
578 # Hide test-only options unless they're used.
579 if test x"$set_widemul" != xauto; then
580 echo " wide multiplication = $set_widemul"
583 echo " valgrind = $enable_valgrind"
585 echo " CFLAGS = $CFLAGS"
586 echo " CPPFLAGS = $CPPFLAGS"
587 echo " LDFLAGS = $LDFLAGS"
589 if test x"$set_precomp" = x"yes"; then
590 echo " CC_FOR_BUILD = $CC_FOR_BUILD"
591 echo " CFLAGS_FOR_BUILD = $CFLAGS_FOR_BUILD"
592 echo " CPPFLAGS_FOR_BUILD = $CPPFLAGS_FOR_BUILD"
593 echo " LDFLAGS_FOR_BUILD = $LDFLAGS_FOR_BUILD"