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)
26 # Save definition of AC_PROG_CC because AM_PROG_CC_C_O in automake<=1.13 will
27 # redefine AC_PROG_CC to exit with an error, which avoids the user calling it
28 # accidently and screwing up the effect of AM_PROG_CC_C_O. However, we'll need
29 # AC_PROG_CC later on in AX_PROG_CC_FOR_BUILD, where its usage is fine, and
30 # we'll carefully make sure not to call AC_PROG_CC anywhere else.
31 m4_copy([AC_PROG_CC], [saved_AC_PROG_CC])
34 m4_rename_force([saved_AC_PROG_CC], [AC_PROG_CC])
37 if test x"$ac_cv_prog_cc_c89" = x"no"; then
38 AC_MSG_ERROR([c89 compiler support required])
44 if test x$cross_compiling != xyes; then
45 AC_PATH_PROG([BREW],brew,)
46 if test x$BREW != x; then
47 # These Homebrew packages may be keg-only, meaning that they won't be found
48 # in expected paths because they may conflict with system files. Ask
49 # Homebrew where each one is located, then adjust paths accordingly.
50 openssl_prefix=`$BREW --prefix openssl 2>/dev/null`
51 valgrind_prefix=`$BREW --prefix valgrind 2>/dev/null`
52 if test x$openssl_prefix != x; then
53 PKG_CONFIG_PATH="$openssl_prefix/lib/pkgconfig:$PKG_CONFIG_PATH"
54 export PKG_CONFIG_PATH
55 CRYPTO_CPPFLAGS="-I$openssl_prefix/include"
57 if test x$valgrind_prefix != x; then
58 VALGRIND_CPPFLAGS="-I$valgrind_prefix/include"
61 AC_PATH_PROG([PORT],port,)
62 # If homebrew isn't installed and macports is, add the macports default paths
64 if test x$PORT != x; then
65 CPPFLAGS="$CPPFLAGS -isystem /opt/local/include"
66 LDFLAGS="$LDFLAGS -L/opt/local/lib"
75 warn_CFLAGS="-std=c89 -pedantic -Wall -Wextra -Wcast-align -Wnested-externs -Wshadow -Wstrict-prototypes -Wundef -Wno-unused-function -Wno-long-long -Wno-overlength-strings"
76 saved_CFLAGS="$CFLAGS"
77 CFLAGS="$warn_CFLAGS $CFLAGS"
78 AC_MSG_CHECKING([if ${CC} supports ${warn_CFLAGS}])
79 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
80 [ AC_MSG_RESULT([yes]) ],
82 CFLAGS="$saved_CFLAGS"
85 saved_CFLAGS="$CFLAGS"
86 CFLAGS="-Wconditional-uninitialized $CFLAGS"
87 AC_MSG_CHECKING([if ${CC} supports -Wconditional-uninitialized])
88 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
89 [ AC_MSG_RESULT([yes]) ],
91 CFLAGS="$saved_CFLAGS"
94 saved_CFLAGS="$CFLAGS"
95 CFLAGS="-fvisibility=hidden $CFLAGS"
96 AC_MSG_CHECKING([if ${CC} supports -fvisibility=hidden])
97 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
98 [ AC_MSG_RESULT([yes]) ],
100 CFLAGS="$saved_CFLAGS"
104 ### Define config arguments
107 AC_ARG_ENABLE(benchmark,
108 AS_HELP_STRING([--enable-benchmark],[compile benchmark [default=yes]]),
109 [use_benchmark=$enableval],
112 AC_ARG_ENABLE(coverage,
113 AS_HELP_STRING([--enable-coverage],[enable compiler flags to support kcov coverage analysis [default=no]]),
114 [enable_coverage=$enableval],
115 [enable_coverage=no])
118 AS_HELP_STRING([--enable-tests],[compile tests [default=yes]]),
119 [use_tests=$enableval],
122 AC_ARG_ENABLE(openssl_tests,
123 AS_HELP_STRING([--enable-openssl-tests],[enable OpenSSL tests [default=auto]]),
124 [enable_openssl_tests=$enableval],
125 [enable_openssl_tests=auto])
127 AC_ARG_ENABLE(experimental,
128 AS_HELP_STRING([--enable-experimental],[allow experimental configure options [default=no]]),
129 [use_experimental=$enableval],
130 [use_experimental=no])
132 AC_ARG_ENABLE(exhaustive_tests,
133 AS_HELP_STRING([--enable-exhaustive-tests],[compile exhaustive tests [default=yes]]),
134 [use_exhaustive_tests=$enableval],
135 [use_exhaustive_tests=yes])
137 AC_ARG_ENABLE(ecmult_static_precomputation,
138 AS_HELP_STRING([--enable-ecmult-static-precomputation],[enable precomputed ecmult table for signing [default=auto]]),
139 [use_ecmult_static_precomputation=$enableval],
140 [use_ecmult_static_precomputation=auto])
142 AC_ARG_ENABLE(module_ecdh,
143 AS_HELP_STRING([--enable-module-ecdh],[enable ECDH shared secret computation]),
144 [enable_module_ecdh=$enableval],
145 [enable_module_ecdh=no])
147 AC_ARG_ENABLE(module_recovery,
148 AS_HELP_STRING([--enable-module-recovery],[enable ECDSA pubkey recovery module [default=no]]),
149 [enable_module_recovery=$enableval],
150 [enable_module_recovery=no])
152 AC_ARG_ENABLE(module_extrakeys,
153 AS_HELP_STRING([--enable-module-extrakeys],[enable extrakeys module (experimental)]),
154 [enable_module_extrakeys=$enableval],
155 [enable_module_extrakeys=no])
157 AC_ARG_ENABLE(module_schnorrsig,
158 AS_HELP_STRING([--enable-module-schnorrsig],[enable schnorrsig module (experimental)]),
159 [enable_module_schnorrsig=$enableval],
160 [enable_module_schnorrsig=no])
162 AC_ARG_ENABLE(external_default_callbacks,
163 AS_HELP_STRING([--enable-external-default-callbacks],[enable external default callback functions [default=no]]),
164 [use_external_default_callbacks=$enableval],
165 [use_external_default_callbacks=no])
167 # Test-only override of the (autodetected by the C code) "widemul" setting.
168 # Legal values are int64 (for [u]int64_t), int128 (for [unsigned] __int128), and auto (the default).
169 AC_ARG_WITH([test-override-wide-multiply], [] ,[set_widemul=$withval], [set_widemul=auto])
171 AC_ARG_WITH([asm], [AS_HELP_STRING([--with-asm=x86_64|arm|no|auto],
172 [assembly optimizations to useĀ (experimental: arm) [default=auto]])],[req_asm=$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"$has_64bit_asm" != x"yes"; then
236 AC_MSG_ERROR([x86_64 assembly optimization requested but not available])
244 AC_MSG_ERROR([invalid assembly optimization selection])
249 # Select assembly optimization
254 AC_DEFINE(USE_ASM_X86_64, 1, [Define this symbol to enable x86_64 assembly optimizations])
262 AC_MSG_ERROR([invalid assembly optimizations])
266 if test x"$use_external_asm" = x"yes"; then
267 AC_DEFINE(USE_EXTERNAL_ASM, 1, [Define this symbol if an external (non-inline) assembly implementation is used])
271 # Select wide multiplication implementation
274 AC_DEFINE(USE_FORCE_WIDEMUL_INT128, 1, [Define this symbol to force the use of the (unsigned) __int128 based wide multiplication implementation])
277 AC_DEFINE(USE_FORCE_WIDEMUL_INT64, 1, [Define this symbol to force the use of the (u)int64_t based wide multiplication implementation])
282 AC_MSG_ERROR([invalid wide multiplication implementation])
286 # Set ecmult window size
287 if test x"$req_ecmult_window" = x"auto"; then
290 set_ecmult_window=$req_ecmult_window
293 error_window_size=['window size for ecmult precomputation not an integer in range [2..24] or "auto"']
294 case $set_ecmult_window in
297 AC_MSG_ERROR($error_window_size)
300 if test "$set_ecmult_window" -lt 2 -o "$set_ecmult_window" -gt 24 ; then
302 AC_MSG_ERROR($error_window_size)
304 AC_DEFINE_UNQUOTED(ECMULT_WINDOW_SIZE, $set_ecmult_window, [Set window size for ecmult precomputation])
308 # Set ecmult gen precision
309 if test x"$req_ecmult_gen_precision" = x"auto"; then
310 set_ecmult_gen_precision=4
312 set_ecmult_gen_precision=$req_ecmult_gen_precision
315 case $set_ecmult_gen_precision in
317 AC_DEFINE_UNQUOTED(ECMULT_GEN_PREC_BITS, $set_ecmult_gen_precision, [Set ecmult gen precision bits])
320 AC_MSG_ERROR(['ecmult gen precision not 2, 4, 8 or "auto"'])
324 if test x"$use_tests" = x"yes"; then
326 if test x"$enable_openssl_tests" != x"no" && test x"$has_openssl_ec" = x"yes"; then
327 enable_openssl_tests=yes
328 AC_DEFINE(ENABLE_OPENSSL_TESTS, 1, [Define this symbol if OpenSSL EC functions are available])
329 SECP_TEST_INCLUDES="$SSL_CFLAGS $CRYPTO_CFLAGS $CRYPTO_CPPFLAGS"
330 SECP_TEST_LIBS="$CRYPTO_LIBS"
334 SECP_TEST_LIBS="$SECP_TEST_LIBS -lgdi32"
338 if test x"$enable_openssl_tests" = x"yes"; then
339 AC_MSG_ERROR([OpenSSL tests requested but OpenSSL with EC support is not available])
341 enable_openssl_tests=no
344 if test x"$enable_openssl_tests" = x"yes"; then
345 AC_MSG_ERROR([OpenSSL tests requested but tests are not enabled])
347 enable_openssl_tests=no
350 if test x"$enable_valgrind" = x"yes"; then
351 SECP_INCLUDES="$SECP_INCLUDES $VALGRIND_CPPFLAGS"
354 # Handle static precomputation (after everything which modifies CFLAGS and friends)
355 if test x"$use_ecmult_static_precomputation" != x"no"; then
356 if test x"$cross_compiling" = x"no"; then
358 if test x"${CC_FOR_BUILD+x}${CFLAGS_FOR_BUILD+x}${CPPFLAGS_FOR_BUILD+x}${LDFLAGS_FOR_BUILD+x}" != x; then
359 AC_MSG_WARN([CC_FOR_BUILD, CFLAGS_FOR_BUILD, CPPFLAGS_FOR_BUILD, and/or LDFLAGS_FOR_BUILD is set but ignored because we are not cross-compiling.])
361 # If we're not cross-compiling, simply use the same compiler for building the static precompation code.
363 CFLAGS_FOR_BUILD="$CFLAGS"
364 CPPFLAGS_FOR_BUILD="$CPPFLAGS"
365 LDFLAGS_FOR_BUILD="$LDFLAGS"
369 # Temporarily switch to an environment for the native compiler
370 save_cross_compiling=$cross_compiling
374 SAVE_CFLAGS="$CFLAGS"
375 CFLAGS="$CFLAGS_FOR_BUILD"
376 SAVE_CPPFLAGS="$CPPFLAGS"
377 CPPFLAGS="$CPPFLAGS_FOR_BUILD"
378 SAVE_LDFLAGS="$LDFLAGS"
379 LDFLAGS="$LDFLAGS_FOR_BUILD"
381 warn_CFLAGS_FOR_BUILD="-Wall -Wextra -Wno-unused-function"
382 saved_CFLAGS="$CFLAGS"
383 CFLAGS="$warn_CFLAGS_FOR_BUILD $CFLAGS"
384 AC_MSG_CHECKING([if native ${CC_FOR_BUILD} supports ${warn_CFLAGS_FOR_BUILD}])
385 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
386 [ AC_MSG_RESULT([yes]) ],
387 [ AC_MSG_RESULT([no])
388 CFLAGS="$saved_CFLAGS"
391 AC_MSG_CHECKING([for working native compiler: ${CC_FOR_BUILD}])
393 [AC_LANG_PROGRAM([], [])],
394 [working_native_cc=yes],
395 [working_native_cc=no],[:])
397 CFLAGS_FOR_BUILD="$CFLAGS"
399 # Restore the environment
400 cross_compiling=$save_cross_compiling
402 CFLAGS="$SAVE_CFLAGS"
403 CPPFLAGS="$SAVE_CPPFLAGS"
404 LDFLAGS="$SAVE_LDFLAGS"
406 if test x"$working_native_cc" = x"no"; then
409 m4_define([please_set_for_build], [Please set CC_FOR_BUILD, CFLAGS_FOR_BUILD, CPPFLAGS_FOR_BUILD, and/or LDFLAGS_FOR_BUILD.])
410 if test x"$use_ecmult_static_precomputation" = x"yes"; then
411 AC_MSG_ERROR([native compiler ${CC_FOR_BUILD} does not produce working binaries. please_set_for_build])
413 AC_MSG_WARN([Disabling statically generated ecmult table because the native compiler ${CC_FOR_BUILD} does not produce working binaries. please_set_for_build])
421 AC_SUBST(CC_FOR_BUILD)
422 AC_SUBST(CFLAGS_FOR_BUILD)
423 AC_SUBST(CPPFLAGS_FOR_BUILD)
424 AC_SUBST(LDFLAGS_FOR_BUILD)
429 if test x"$set_precomp" = x"yes"; then
430 AC_DEFINE(USE_ECMULT_STATIC_PRECOMPUTATION, 1, [Define this symbol to use a statically generated ecmult table])
434 ### Handle module options
437 if test x"$enable_module_ecdh" = x"yes"; then
438 AC_DEFINE(ENABLE_MODULE_ECDH, 1, [Define this symbol to enable the ECDH module])
441 if test x"$enable_module_recovery" = x"yes"; then
442 AC_DEFINE(ENABLE_MODULE_RECOVERY, 1, [Define this symbol to enable the ECDSA pubkey recovery module])
445 if test x"$enable_module_schnorrsig" = x"yes"; then
446 AC_DEFINE(ENABLE_MODULE_SCHNORRSIG, 1, [Define this symbol to enable the schnorrsig module])
447 enable_module_extrakeys=yes
450 # Test if extrakeys is set after the schnorrsig module to allow the schnorrsig
451 # module to set enable_module_extrakeys=yes
452 if test x"$enable_module_extrakeys" = x"yes"; then
453 AC_DEFINE(ENABLE_MODULE_EXTRAKEYS, 1, [Define this symbol to enable the extrakeys module])
456 if test x"$use_external_default_callbacks" = x"yes"; then
457 AC_DEFINE(USE_EXTERNAL_DEFAULT_CALLBACKS, 1, [Define this symbol if an external implementation of the default callbacks is used])
461 ### Check for --enable-experimental if necessary
464 if test x"$enable_experimental" = x"yes"; then
465 AC_MSG_NOTICE([******])
466 AC_MSG_NOTICE([WARNING: experimental build])
467 AC_MSG_NOTICE([Experimental features do not have stable APIs or properties, and may not be safe for production use.])
468 AC_MSG_NOTICE([Building extrakeys module: $enable_module_extrakeys])
469 AC_MSG_NOTICE([Building schnorrsig module: $enable_module_schnorrsig])
470 AC_MSG_NOTICE([******])
472 if test x"$enable_module_extrakeys" = x"yes"; then
473 AC_MSG_ERROR([extrakeys module is experimental. Use --enable-experimental to allow.])
475 if test x"$enable_module_schnorrsig" = x"yes"; then
476 AC_MSG_ERROR([schnorrsig module is experimental. Use --enable-experimental to allow.])
478 if test x"$set_asm" = x"arm"; then
479 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"$set_asm" = x"arm"])
505 # Make sure nothing new is exported so that we don't break the cache.
506 PKGCONFIG_PATH_TEMP="$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 " ecmult window size = $set_ecmult_window"
527 echo " ecmult gen prec. bits = $set_ecmult_gen_precision"
528 # Hide test-only options unless they're used.
529 if test x"$set_widemul" != xauto; then
530 echo " wide multiplication = $set_widemul"
533 echo " valgrind = $enable_valgrind"
535 echo " CFLAGS = $CFLAGS"
536 echo " CPPFLAGS = $CPPFLAGS"
537 echo " LDFLAGS = $LDFLAGS"
539 if test x"$set_precomp" = x"yes"; then
540 echo " CC_FOR_BUILD = $CC_FOR_BUILD"
541 echo " CFLAGS_FOR_BUILD = $CFLAGS_FOR_BUILD"
542 echo " CPPFLAGS_FOR_BUILD = $CPPFLAGS_FOR_BUILD"
543 echo " LDFLAGS_FOR_BUILD = $LDFLAGS_FOR_BUILD"