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="-fvisibility=hidden $CFLAGS"
87 AC_MSG_CHECKING([if ${CC} supports -fvisibility=hidden])
88 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
89 [ AC_MSG_RESULT([yes]) ],
91 CFLAGS="$saved_CFLAGS"
95 ### Define config arguments
98 AC_ARG_ENABLE(benchmark,
99 AS_HELP_STRING([--enable-benchmark],[compile benchmark [default=yes]]),
100 [use_benchmark=$enableval],
103 AC_ARG_ENABLE(coverage,
104 AS_HELP_STRING([--enable-coverage],[enable compiler flags to support kcov coverage analysis [default=no]]),
105 [enable_coverage=$enableval],
106 [enable_coverage=no])
109 AS_HELP_STRING([--enable-tests],[compile tests [default=yes]]),
110 [use_tests=$enableval],
113 AC_ARG_ENABLE(openssl_tests,
114 AS_HELP_STRING([--enable-openssl-tests],[enable OpenSSL tests [default=auto]]),
115 [enable_openssl_tests=$enableval],
116 [enable_openssl_tests=auto])
118 AC_ARG_ENABLE(experimental,
119 AS_HELP_STRING([--enable-experimental],[allow experimental configure options [default=no]]),
120 [use_experimental=$enableval],
121 [use_experimental=no])
123 AC_ARG_ENABLE(exhaustive_tests,
124 AS_HELP_STRING([--enable-exhaustive-tests],[compile exhaustive tests [default=yes]]),
125 [use_exhaustive_tests=$enableval],
126 [use_exhaustive_tests=yes])
128 AC_ARG_ENABLE(ecmult_static_precomputation,
129 AS_HELP_STRING([--enable-ecmult-static-precomputation],[enable precomputed ecmult table for signing [default=auto]]),
130 [use_ecmult_static_precomputation=$enableval],
131 [use_ecmult_static_precomputation=auto])
133 AC_ARG_ENABLE(module_ecdh,
134 AS_HELP_STRING([--enable-module-ecdh],[enable ECDH shared secret computation]),
135 [enable_module_ecdh=$enableval],
136 [enable_module_ecdh=no])
138 AC_ARG_ENABLE(module_recovery,
139 AS_HELP_STRING([--enable-module-recovery],[enable ECDSA pubkey recovery module [default=no]]),
140 [enable_module_recovery=$enableval],
141 [enable_module_recovery=no])
143 AC_ARG_ENABLE(module_extrakeys,
144 AS_HELP_STRING([--enable-module-extrakeys],[enable extrakeys module (experimental)]),
145 [enable_module_extrakeys=$enableval],
146 [enable_module_extrakeys=no])
148 AC_ARG_ENABLE(module_schnorrsig,
149 AS_HELP_STRING([--enable-module-schnorrsig],[enable schnorrsig module (experimental)]),
150 [enable_module_schnorrsig=$enableval],
151 [enable_module_schnorrsig=no])
153 AC_ARG_ENABLE(external_default_callbacks,
154 AS_HELP_STRING([--enable-external-default-callbacks],[enable external default callback functions [default=no]]),
155 [use_external_default_callbacks=$enableval],
156 [use_external_default_callbacks=no])
158 # Test-only override of the (autodetected by the C code) "widemul" setting.
159 # Legal values are int64 (for [u]int64_t), int128 (for [unsigned] __int128), and auto (the default).
160 AC_ARG_WITH([test-override-wide-multiply], [] ,[set_widemul=$withval], [set_widemul=auto])
162 AC_ARG_WITH([asm], [AS_HELP_STRING([--with-asm=x86_64|arm|no|auto],
163 [assembly optimizations to useĀ (experimental: arm) [default=auto]])],[req_asm=$withval], [req_asm=auto])
165 AC_ARG_WITH([ecmult-window], [AS_HELP_STRING([--with-ecmult-window=SIZE|auto],
166 [window size for ecmult precomputation for verification, specified as integer in range [2..24].]
167 [Larger values result in possibly better performance at the cost of an exponentially larger precomputed table.]
168 [The table will store 2^(SIZE-1) * 64 bytes of data but can be larger in memory due to platform-specific padding and alignment.]
169 ["auto" is a reasonable setting for desktop machines (currently 15). [default=auto]]
171 [req_ecmult_window=$withval], [req_ecmult_window=auto])
173 AC_ARG_WITH([ecmult-gen-precision], [AS_HELP_STRING([--with-ecmult-gen-precision=2|4|8|auto],
174 [Precision bits to tune the precomputed table size for signing.]
175 [The size of the table is 32kB for 2 bits, 64kB for 4 bits, 512kB for 8 bits of precision.]
176 [A larger table size usually results in possible faster signing.]
177 ["auto" is a reasonable setting for desktop machines (currently 4). [default=auto]]
179 [req_ecmult_gen_precision=$withval], [req_ecmult_gen_precision=auto])
181 AC_ARG_WITH([valgrind], [AS_HELP_STRING([--with-valgrind=yes|no|auto],
182 [Build with extra checks for running inside Valgrind [default=auto]]
184 [req_valgrind=$withval], [req_valgrind=auto])
187 ### Handle config options (except for modules)
190 if test x"$req_valgrind" = x"no"; then
194 if test x"$has_valgrind" != x"yes"; then
195 if test x"$req_valgrind" = x"yes"; then
196 AC_MSG_ERROR([Valgrind support explicitly requested but valgrind/memcheck.h header not available])
203 AM_CONDITIONAL([VALGRIND_ENABLED],[test "$enable_valgrind" = "yes"])
205 if test x"$enable_coverage" = x"yes"; then
206 AC_DEFINE(COVERAGE, 1, [Define this symbol to compile out all VERIFY code])
207 CFLAGS="-O0 --coverage $CFLAGS"
208 LDFLAGS="--coverage $LDFLAGS"
213 if test x"$req_asm" = x"auto"; then
215 if test x"$has_64bit_asm" = x"yes"; then
218 if test x"$set_asm" = x; then
226 if test x"$has_64bit_asm" != x"yes"; then
227 AC_MSG_ERROR([x86_64 assembly optimization requested but not available])
235 AC_MSG_ERROR([invalid assembly optimization selection])
240 # Select assembly optimization
245 AC_DEFINE(USE_ASM_X86_64, 1, [Define this symbol to enable x86_64 assembly optimizations])
253 AC_MSG_ERROR([invalid assembly optimizations])
257 if test x"$use_external_asm" = x"yes"; then
258 AC_DEFINE(USE_EXTERNAL_ASM, 1, [Define this symbol if an external (non-inline) assembly implementation is used])
262 # Select wide multiplication implementation
265 AC_DEFINE(USE_FORCE_WIDEMUL_INT128, 1, [Define this symbol to force the use of the (unsigned) __int128 based wide multiplication implementation])
268 AC_DEFINE(USE_FORCE_WIDEMUL_INT64, 1, [Define this symbol to force the use of the (u)int64_t based wide multiplication implementation])
273 AC_MSG_ERROR([invalid wide multiplication implementation])
277 # Set ecmult window size
278 if test x"$req_ecmult_window" = x"auto"; then
281 set_ecmult_window=$req_ecmult_window
284 error_window_size=['window size for ecmult precomputation not an integer in range [2..24] or "auto"']
285 case $set_ecmult_window in
288 AC_MSG_ERROR($error_window_size)
291 if test "$set_ecmult_window" -lt 2 -o "$set_ecmult_window" -gt 24 ; then
293 AC_MSG_ERROR($error_window_size)
295 AC_DEFINE_UNQUOTED(ECMULT_WINDOW_SIZE, $set_ecmult_window, [Set window size for ecmult precomputation])
299 # Set ecmult gen precision
300 if test x"$req_ecmult_gen_precision" = x"auto"; then
301 set_ecmult_gen_precision=4
303 set_ecmult_gen_precision=$req_ecmult_gen_precision
306 case $set_ecmult_gen_precision in
308 AC_DEFINE_UNQUOTED(ECMULT_GEN_PREC_BITS, $set_ecmult_gen_precision, [Set ecmult gen precision bits])
311 AC_MSG_ERROR(['ecmult gen precision not 2, 4, 8 or "auto"'])
315 if test x"$use_tests" = x"yes"; then
317 if test x"$enable_openssl_tests" != x"no" && test x"$has_openssl_ec" = x"yes"; then
318 enable_openssl_tests=yes
319 AC_DEFINE(ENABLE_OPENSSL_TESTS, 1, [Define this symbol if OpenSSL EC functions are available])
320 SECP_TEST_INCLUDES="$SSL_CFLAGS $CRYPTO_CFLAGS $CRYPTO_CPPFLAGS"
321 SECP_TEST_LIBS="$CRYPTO_LIBS"
325 SECP_TEST_LIBS="$SECP_TEST_LIBS -lgdi32"
329 if test x"$enable_openssl_tests" = x"yes"; then
330 AC_MSG_ERROR([OpenSSL tests requested but OpenSSL with EC support is not available])
332 enable_openssl_tests=no
335 if test x"$enable_openssl_tests" = x"yes"; then
336 AC_MSG_ERROR([OpenSSL tests requested but tests are not enabled])
338 enable_openssl_tests=no
341 if test x"$enable_valgrind" = x"yes"; then
342 SECP_INCLUDES="$SECP_INCLUDES $VALGRIND_CPPFLAGS"
345 # Handle static precomputation (after everything which modifies CFLAGS and friends)
346 if test x"$use_ecmult_static_precomputation" != x"no"; then
347 if test x"$cross_compiling" = x"no"; then
349 if test x"${CC_FOR_BUILD+x}${CFLAGS_FOR_BUILD+x}${CPPFLAGS_FOR_BUILD+x}${LDFLAGS_FOR_BUILD+x}" != x; then
350 AC_MSG_WARN([CC_FOR_BUILD, CFLAGS_FOR_BUILD, CPPFLAGS_FOR_BUILD, and/or LDFLAGS_FOR_BUILD is set but ignored because we are not cross-compiling.])
352 # If we're not cross-compiling, simply use the same compiler for building the static precompation code.
354 CFLAGS_FOR_BUILD="$CFLAGS"
355 CPPFLAGS_FOR_BUILD="$CPPFLAGS"
356 LDFLAGS_FOR_BUILD="$LDFLAGS"
360 # Temporarily switch to an environment for the native compiler
361 save_cross_compiling=$cross_compiling
365 SAVE_CFLAGS="$CFLAGS"
366 CFLAGS="$CFLAGS_FOR_BUILD"
367 SAVE_CPPFLAGS="$CPPFLAGS"
368 CPPFLAGS="$CPPFLAGS_FOR_BUILD"
369 SAVE_LDFLAGS="$LDFLAGS"
370 LDFLAGS="$LDFLAGS_FOR_BUILD"
372 warn_CFLAGS_FOR_BUILD="-Wall -Wextra -Wno-unused-function"
373 saved_CFLAGS="$CFLAGS"
374 CFLAGS="$warn_CFLAGS_FOR_BUILD $CFLAGS"
375 AC_MSG_CHECKING([if native ${CC_FOR_BUILD} supports ${warn_CFLAGS_FOR_BUILD}])
376 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[char foo;]])],
377 [ AC_MSG_RESULT([yes]) ],
378 [ AC_MSG_RESULT([no])
379 CFLAGS="$saved_CFLAGS"
382 AC_MSG_CHECKING([for working native compiler: ${CC_FOR_BUILD}])
384 [AC_LANG_PROGRAM([], [])],
385 [working_native_cc=yes],
386 [working_native_cc=no],[:])
388 CFLAGS_FOR_BUILD="$CFLAGS"
390 # Restore the environment
391 cross_compiling=$save_cross_compiling
393 CFLAGS="$SAVE_CFLAGS"
394 CPPFLAGS="$SAVE_CPPFLAGS"
395 LDFLAGS="$SAVE_LDFLAGS"
397 if test x"$working_native_cc" = x"no"; then
400 m4_define([please_set_for_build], [Please set CC_FOR_BUILD, CFLAGS_FOR_BUILD, CPPFLAGS_FOR_BUILD, and/or LDFLAGS_FOR_BUILD.])
401 if test x"$use_ecmult_static_precomputation" = x"yes"; then
402 AC_MSG_ERROR([native compiler ${CC_FOR_BUILD} does not produce working binaries. please_set_for_build])
404 AC_MSG_WARN([Disabling statically generated ecmult table because the native compiler ${CC_FOR_BUILD} does not produce working binaries. please_set_for_build])
412 AC_SUBST(CC_FOR_BUILD)
413 AC_SUBST(CFLAGS_FOR_BUILD)
414 AC_SUBST(CPPFLAGS_FOR_BUILD)
415 AC_SUBST(LDFLAGS_FOR_BUILD)
420 if test x"$set_precomp" = x"yes"; then
421 AC_DEFINE(USE_ECMULT_STATIC_PRECOMPUTATION, 1, [Define this symbol to use a statically generated ecmult table])
425 ### Handle module options
428 if test x"$enable_module_ecdh" = x"yes"; then
429 AC_DEFINE(ENABLE_MODULE_ECDH, 1, [Define this symbol to enable the ECDH module])
432 if test x"$enable_module_recovery" = x"yes"; then
433 AC_DEFINE(ENABLE_MODULE_RECOVERY, 1, [Define this symbol to enable the ECDSA pubkey recovery module])
436 if test x"$enable_module_schnorrsig" = x"yes"; then
437 AC_DEFINE(ENABLE_MODULE_SCHNORRSIG, 1, [Define this symbol to enable the schnorrsig module])
438 enable_module_extrakeys=yes
441 # Test if extrakeys is set after the schnorrsig module to allow the schnorrsig
442 # module to set enable_module_extrakeys=yes
443 if test x"$enable_module_extrakeys" = x"yes"; then
444 AC_DEFINE(ENABLE_MODULE_EXTRAKEYS, 1, [Define this symbol to enable the extrakeys module])
447 if test x"$use_external_default_callbacks" = x"yes"; then
448 AC_DEFINE(USE_EXTERNAL_DEFAULT_CALLBACKS, 1, [Define this symbol if an external implementation of the default callbacks is used])
452 ### Check for --enable-experimental if necessary
455 if test x"$enable_experimental" = x"yes"; then
456 AC_MSG_NOTICE([******])
457 AC_MSG_NOTICE([WARNING: experimental build])
458 AC_MSG_NOTICE([Experimental features do not have stable APIs or properties, and may not be safe for production use.])
459 AC_MSG_NOTICE([Building extrakeys module: $enable_module_extrakeys])
460 AC_MSG_NOTICE([Building schnorrsig module: $enable_module_schnorrsig])
461 AC_MSG_NOTICE([******])
463 if test x"$enable_module_extrakeys" = x"yes"; then
464 AC_MSG_ERROR([extrakeys module is experimental. Use --enable-experimental to allow.])
466 if test x"$enable_module_schnorrsig" = x"yes"; then
467 AC_MSG_ERROR([schnorrsig module is experimental. Use --enable-experimental to allow.])
469 if test x"$set_asm" = x"arm"; then
470 AC_MSG_ERROR([ARM assembly optimization is experimental. Use --enable-experimental to allow.])
478 AC_CONFIG_HEADERS([src/libsecp256k1-config.h])
479 AC_CONFIG_FILES([Makefile libsecp256k1.pc])
480 AC_SUBST(SECP_INCLUDES)
482 AC_SUBST(SECP_TEST_LIBS)
483 AC_SUBST(SECP_TEST_INCLUDES)
484 AM_CONDITIONAL([ENABLE_COVERAGE], [test x"$enable_coverage" = x"yes"])
485 AM_CONDITIONAL([USE_TESTS], [test x"$use_tests" != x"no"])
486 AM_CONDITIONAL([USE_EXHAUSTIVE_TESTS], [test x"$use_exhaustive_tests" != x"no"])
487 AM_CONDITIONAL([USE_BENCHMARK], [test x"$use_benchmark" = x"yes"])
488 AM_CONDITIONAL([USE_ECMULT_STATIC_PRECOMPUTATION], [test x"$set_precomp" = x"yes"])
489 AM_CONDITIONAL([ENABLE_MODULE_ECDH], [test x"$enable_module_ecdh" = x"yes"])
490 AM_CONDITIONAL([ENABLE_MODULE_RECOVERY], [test x"$enable_module_recovery" = x"yes"])
491 AM_CONDITIONAL([ENABLE_MODULE_EXTRAKEYS], [test x"$enable_module_extrakeys" = x"yes"])
492 AM_CONDITIONAL([ENABLE_MODULE_SCHNORRSIG], [test x"$enable_module_schnorrsig" = x"yes"])
493 AM_CONDITIONAL([USE_EXTERNAL_ASM], [test x"$use_external_asm" = x"yes"])
494 AM_CONDITIONAL([USE_ASM_ARM], [test x"$set_asm" = x"arm"])
496 # Make sure nothing new is exported so that we don't break the cache.
497 PKGCONFIG_PATH_TEMP="$PKG_CONFIG_PATH"
498 unset PKG_CONFIG_PATH
499 PKG_CONFIG_PATH="$PKGCONFIG_PATH_TEMP"
504 echo "Build Options:"
505 echo " with ecmult precomp = $set_precomp"
506 echo " with external callbacks = $use_external_default_callbacks"
507 echo " with benchmarks = $use_benchmark"
508 echo " with tests = $use_tests"
509 echo " with openssl tests = $enable_openssl_tests"
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 " ecmult window size = $set_ecmult_window"
518 echo " ecmult gen prec. bits = $set_ecmult_gen_precision"
519 # Hide test-only options unless they're used.
520 if test x"$set_widemul" != xauto; then
521 echo " wide multiplication = $set_widemul"
524 echo " valgrind = $enable_valgrind"
526 echo " CFLAGS = $CFLAGS"
527 echo " CPPFLAGS = $CPPFLAGS"
528 echo " LDFLAGS = $LDFLAGS"
530 if test x"$set_precomp" = x"yes"; then
531 echo " CC_FOR_BUILD = $CC_FOR_BUILD"
532 echo " CFLAGS_FOR_BUILD = $CFLAGS_FOR_BUILD"
533 echo " CPPFLAGS_FOR_BUILD = $CPPFLAGS_FOR_BUILD"
534 echo " LDFLAGS_FOR_BUILD = $LDFLAGS_FOR_BUILD"