diff options
Diffstat (limited to 'src/secp256k1/configure.ac')
| -rw-r--r-- | src/secp256k1/configure.ac | 451 |
1 files changed, 451 insertions, 0 deletions
diff --git a/src/secp256k1/configure.ac b/src/secp256k1/configure.ac new file mode 100644 index 0000000000..68f279b17b --- /dev/null +++ b/src/secp256k1/configure.ac @@ -0,0 +1,451 @@ +AC_PREREQ([2.60]) + +# The package (a.k.a. release) version is based on semantic versioning 2.0.0 of +# the API. All changes in experimental modules are treated as +# backwards-compatible and therefore at most increase the minor version. +define(_PKG_VERSION_MAJOR, 0) +define(_PKG_VERSION_MINOR, 2) +define(_PKG_VERSION_PATCH, 0) +define(_PKG_VERSION_IS_RELEASE, true) + +# The library version is based on libtool versioning of the ABI. The set of +# rules for updating the version can be found here: +# https://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html +# All changes in experimental modules are treated as if they don't affect the +# interface and therefore only increase the revision. +define(_LIB_VERSION_CURRENT, 1) +define(_LIB_VERSION_REVISION, 0) +define(_LIB_VERSION_AGE, 0) + +AC_INIT([libsecp256k1],m4_join([.], _PKG_VERSION_MAJOR, _PKG_VERSION_MINOR, _PKG_VERSION_PATCH)m4_if(_PKG_VERSION_IS_RELEASE, [true], [], [-dev]),[https://github.com/bitcoin-core/secp256k1/issues],[libsecp256k1],[https://github.com/bitcoin-core/secp256k1]) + +AC_CONFIG_AUX_DIR([build-aux]) +AC_CONFIG_MACRO_DIR([build-aux/m4]) +AC_CANONICAL_HOST +AH_TOP([#ifndef LIBSECP256K1_CONFIG_H]) +AH_TOP([#define LIBSECP256K1_CONFIG_H]) +AH_BOTTOM([#endif /*LIBSECP256K1_CONFIG_H*/]) + +# Require Automake 1.11.2 for AM_PROG_AR +AM_INIT_AUTOMAKE([1.11.2 foreign subdir-objects]) + +# Make the compilation flags quiet unless V=1 is used. +m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])]) + +AC_PROG_CC +AM_PROG_AS +AM_PROG_AR + +# Clear some cache variables as a workaround for a bug that appears due to a bad +# interaction between AM_PROG_AR and LT_INIT when combining MSVC's archiver lib.exe. +# https://debbugs.gnu.org/cgi/bugreport.cgi?bug=54421 +AS_UNSET(ac_cv_prog_AR) +AS_UNSET(ac_cv_prog_ac_ct_AR) +LT_INIT([win32-dll]) + +build_windows=no + +case $host_os in + *darwin*) + if test x$cross_compiling != xyes; then + AC_CHECK_PROG([BREW], brew, brew) + if test x$BREW = xbrew; then + # These Homebrew packages may be keg-only, meaning that they won't be found + # in expected paths because they may conflict with system files. Ask + # Homebrew where each one is located, then adjust paths accordingly. + if $BREW list --versions valgrind >/dev/null; then + valgrind_prefix=$($BREW --prefix valgrind 2>/dev/null) + VALGRIND_CPPFLAGS="-I$valgrind_prefix/include" + fi + else + AC_CHECK_PROG([PORT], port, port) + # If homebrew isn't installed and macports is, add the macports default paths + # as a last resort. + if test x$PORT = xport; then + CPPFLAGS="$CPPFLAGS -isystem /opt/local/include" + LDFLAGS="$LDFLAGS -L/opt/local/lib" + fi + fi + fi + ;; + cygwin*|mingw*) + build_windows=yes + ;; +esac + +# Try if some desirable compiler flags are supported and append them to SECP_CFLAGS. +# +# These are our own flags, so we append them to our own SECP_CFLAGS variable (instead of CFLAGS) as +# recommended in the automake manual (Section "Flag Variables Ordering"). CFLAGS belongs to the user +# and we are not supposed to touch it. In the Makefile, we will need to ensure that SECP_CFLAGS +# is prepended to CFLAGS when invoking the compiler so that the user always has the last word (flag). +# +# Another advantage of not touching CFLAGS is that the contents of CFLAGS will be picked up by +# libtool for compiling helper executables. For example, when compiling for Windows, libtool will +# generate entire wrapper executables (instead of simple wrapper scripts as on Unix) to ensure +# proper operation of uninstalled programs linked by libtool against the uninstalled shared library. +# These executables are compiled from C source file for which our flags may not be appropriate, +# e.g., -std=c89 flag has lead to undesirable warnings in the past. +# +# TODO We should analogously not touch CPPFLAGS and LDFLAGS but currently there are no issues. +AC_DEFUN([SECP_TRY_APPEND_DEFAULT_CFLAGS], [ + # GCC and compatible (incl. clang) + if test "x$GCC" = "xyes"; then + # Try to append -Werror=unknown-warning-option to CFLAGS temporarily. Otherwise clang will + # not error out if it gets unknown warning flags and the checks here will always succeed + # no matter if clang knows the flag or not. + SECP_TRY_APPEND_DEFAULT_CFLAGS_saved_CFLAGS="$CFLAGS" + SECP_TRY_APPEND_CFLAGS([-Werror=unknown-warning-option], CFLAGS) + + SECP_TRY_APPEND_CFLAGS([-std=c89 -pedantic -Wno-long-long -Wnested-externs -Wshadow -Wstrict-prototypes -Wundef], $1) # GCC >= 3.0, -Wlong-long is implied by -pedantic. + SECP_TRY_APPEND_CFLAGS([-Wno-overlength-strings], $1) # GCC >= 4.2, -Woverlength-strings is implied by -pedantic. + SECP_TRY_APPEND_CFLAGS([-Wall], $1) # GCC >= 2.95 and probably many other compilers + SECP_TRY_APPEND_CFLAGS([-Wno-unused-function], $1) # GCC >= 3.0, -Wunused-function is implied by -Wall. + SECP_TRY_APPEND_CFLAGS([-Wextra], $1) # GCC >= 3.4, this is the newer name of -W, which we don't use because older GCCs will warn about unused functions. + SECP_TRY_APPEND_CFLAGS([-Wcast-align], $1) # GCC >= 2.95 + SECP_TRY_APPEND_CFLAGS([-Wcast-align=strict], $1) # GCC >= 8.0 + SECP_TRY_APPEND_CFLAGS([-Wconditional-uninitialized], $1) # Clang >= 3.0 only + SECP_TRY_APPEND_CFLAGS([-fvisibility=hidden], $1) # GCC >= 4.0 + + CFLAGS="$SECP_TRY_APPEND_DEFAULT_CFLAGS_saved_CFLAGS" + fi + + # MSVC + # Assume MSVC if we're building for Windows but not with GCC or compatible; + # libtool makes the same assumption internally. + # Note that "/opt" and "-opt" are equivalent for MSVC; we use "-opt" because "/opt" looks like a path. + if test x"$GCC" != x"yes" && test x"$build_windows" = x"yes"; then + SECP_TRY_APPEND_CFLAGS([-W2 -wd4146], $1) # Moderate warning level, disable warning C4146 "unary minus operator applied to unsigned type, result still unsigned" + SECP_TRY_APPEND_CFLAGS([-external:anglebrackets -external:W0], $1) # Suppress warnings from #include <...> files + fi +]) +SECP_TRY_APPEND_DEFAULT_CFLAGS(SECP_CFLAGS) + +### +### Define config arguments +### + +# In dev mode, we enable all binaries and modules by default but individual options can still be overridden explicitly. +# Check for dev mode first because SECP_SET_DEFAULT needs enable_dev_mode set. +AC_ARG_ENABLE(dev_mode, [], [], + [enable_dev_mode=no]) + +AC_ARG_ENABLE(benchmark, + AS_HELP_STRING([--enable-benchmark],[compile benchmark [default=yes]]), [], + [SECP_SET_DEFAULT([enable_benchmark], [yes], [yes])]) + +AC_ARG_ENABLE(coverage, + AS_HELP_STRING([--enable-coverage],[enable compiler flags to support kcov coverage analysis [default=no]]), [], + [SECP_SET_DEFAULT([enable_coverage], [no], [no])]) + +AC_ARG_ENABLE(tests, + AS_HELP_STRING([--enable-tests],[compile tests [default=yes]]), [], + [SECP_SET_DEFAULT([enable_tests], [yes], [yes])]) + +AC_ARG_ENABLE(experimental, + AS_HELP_STRING([--enable-experimental],[allow experimental configure options [default=no]]), [], + [SECP_SET_DEFAULT([enable_experimental], [no], [yes])]) + +AC_ARG_ENABLE(exhaustive_tests, + AS_HELP_STRING([--enable-exhaustive-tests],[compile exhaustive tests [default=yes]]), [], + [SECP_SET_DEFAULT([enable_exhaustive_tests], [yes], [yes])]) + +AC_ARG_ENABLE(examples, + AS_HELP_STRING([--enable-examples],[compile the examples [default=no]]), [], + [SECP_SET_DEFAULT([enable_examples], [no], [yes])]) + +AC_ARG_ENABLE(module_ecdh, + AS_HELP_STRING([--enable-module-ecdh],[enable ECDH module [default=yes]]), [], + [SECP_SET_DEFAULT([enable_module_ecdh], [yes], [yes])]) + +AC_ARG_ENABLE(module_recovery, + AS_HELP_STRING([--enable-module-recovery],[enable ECDSA pubkey recovery module [default=no]]), [], + [SECP_SET_DEFAULT([enable_module_recovery], [no], [yes])]) + +AC_ARG_ENABLE(module_extrakeys, + AS_HELP_STRING([--enable-module-extrakeys],[enable extrakeys module [default=yes]]), [], + [SECP_SET_DEFAULT([enable_module_extrakeys], [yes], [yes])]) + +AC_ARG_ENABLE(module_schnorrsig, + AS_HELP_STRING([--enable-module-schnorrsig],[enable schnorrsig module [default=yes]]), [], + [SECP_SET_DEFAULT([enable_module_schnorrsig], [yes], [yes])]) + +AC_ARG_ENABLE(external_default_callbacks, + AS_HELP_STRING([--enable-external-default-callbacks],[enable external default callback functions [default=no]]), [], + [SECP_SET_DEFAULT([enable_external_default_callbacks], [no], [no])]) + +# Test-only override of the (autodetected by the C code) "widemul" setting. +# Legal values are: +# * int64 (for [u]int64_t), +# * int128 (for [unsigned] __int128), +# * int128_struct (for int128 implemented as a structure), +# * and auto (the default). +AC_ARG_WITH([test-override-wide-multiply], [] ,[set_widemul=$withval], [set_widemul=auto]) + +AC_ARG_WITH([asm], [AS_HELP_STRING([--with-asm=x86_64|arm|no|auto], +[assembly optimizations to use (experimental: arm) [default=auto]])],[req_asm=$withval], [req_asm=auto]) + +AC_ARG_WITH([ecmult-window], [AS_HELP_STRING([--with-ecmult-window=SIZE|auto], +[window size for ecmult precomputation for verification, specified as integer in range [2..24].] +[Larger values result in possibly better performance at the cost of an exponentially larger precomputed table.] +[The table will store 2^(SIZE-1) * 64 bytes of data but can be larger in memory due to platform-specific padding and alignment.] +[A window size larger than 15 will require you delete the prebuilt precomputed_ecmult.c file so that it can be rebuilt.] +[For very large window sizes, use "make -j 1" to reduce memory use during compilation.] +["auto" is a reasonable setting for desktop machines (currently 15). [default=auto]] +)], +[req_ecmult_window=$withval], [req_ecmult_window=auto]) + +AC_ARG_WITH([ecmult-gen-precision], [AS_HELP_STRING([--with-ecmult-gen-precision=2|4|8|auto], +[Precision bits to tune the precomputed table size for signing.] +[The size of the table is 32kB for 2 bits, 64kB for 4 bits, 512kB for 8 bits of precision.] +[A larger table size usually results in possible faster signing.] +["auto" is a reasonable setting for desktop machines (currently 4). [default=auto]] +)], +[req_ecmult_gen_precision=$withval], [req_ecmult_gen_precision=auto]) + +AC_ARG_WITH([valgrind], [AS_HELP_STRING([--with-valgrind=yes|no|auto], +[Build with extra checks for running inside Valgrind [default=auto]] +)], +[req_valgrind=$withval], [req_valgrind=auto]) + +### +### Handle config options (except for modules) +### + +if test x"$req_valgrind" = x"no"; then + enable_valgrind=no +else + SECP_VALGRIND_CHECK + if test x"$has_valgrind" != x"yes"; then + if test x"$req_valgrind" = x"yes"; then + AC_MSG_ERROR([Valgrind support explicitly requested but valgrind/memcheck.h header not available]) + fi + enable_valgrind=no + else + enable_valgrind=yes + fi +fi +AM_CONDITIONAL([VALGRIND_ENABLED],[test "$enable_valgrind" = "yes"]) + +if test x"$enable_coverage" = x"yes"; then + AC_DEFINE(COVERAGE, 1, [Define this symbol to compile out all VERIFY code]) + SECP_CFLAGS="-O0 --coverage $SECP_CFLAGS" + LDFLAGS="--coverage $LDFLAGS" +else + # Most likely the CFLAGS already contain -O2 because that is autoconf's default. + # We still add it here because passing it twice is not an issue, and handling + # this case would just add unnecessary complexity (see #896). + SECP_CFLAGS="-O2 $SECP_CFLAGS" +fi + +if test x"$req_asm" = x"auto"; then + SECP_64BIT_ASM_CHECK + if test x"$has_64bit_asm" = x"yes"; then + set_asm=x86_64 + fi + if test x"$set_asm" = x; then + set_asm=no + fi +else + set_asm=$req_asm + case $set_asm in + x86_64) + SECP_64BIT_ASM_CHECK + if test x"$has_64bit_asm" != x"yes"; then + AC_MSG_ERROR([x86_64 assembly optimization requested but not available]) + fi + ;; + arm) + ;; + no) + ;; + *) + AC_MSG_ERROR([invalid assembly optimization selection]) + ;; + esac +fi + +# Select assembly optimization +enable_external_asm=no + +case $set_asm in +x86_64) + AC_DEFINE(USE_ASM_X86_64, 1, [Define this symbol to enable x86_64 assembly optimizations]) + ;; +arm) + enable_external_asm=yes + ;; +no) + ;; +*) + AC_MSG_ERROR([invalid assembly optimizations]) + ;; +esac + +if test x"$enable_external_asm" = x"yes"; then + AC_DEFINE(USE_EXTERNAL_ASM, 1, [Define this symbol if an external (non-inline) assembly implementation is used]) +fi + + +# Select wide multiplication implementation +case $set_widemul in +int128_struct) + AC_DEFINE(USE_FORCE_WIDEMUL_INT128_STRUCT, 1, [Define this symbol to force the use of the structure for simulating (unsigned) int128 based wide multiplication]) + ;; +int128) + AC_DEFINE(USE_FORCE_WIDEMUL_INT128, 1, [Define this symbol to force the use of the (unsigned) __int128 based wide multiplication implementation]) + ;; +int64) + AC_DEFINE(USE_FORCE_WIDEMUL_INT64, 1, [Define this symbol to force the use of the (u)int64_t based wide multiplication implementation]) + ;; +auto) + ;; +*) + AC_MSG_ERROR([invalid wide multiplication implementation]) + ;; +esac + +# Set ecmult window size +if test x"$req_ecmult_window" = x"auto"; then + set_ecmult_window=15 +else + set_ecmult_window=$req_ecmult_window +fi + +error_window_size=['window size for ecmult precomputation not an integer in range [2..24] or "auto"'] +case $set_ecmult_window in +''|*[[!0-9]]*) + # no valid integer + AC_MSG_ERROR($error_window_size) + ;; +*) + if test "$set_ecmult_window" -lt 2 -o "$set_ecmult_window" -gt 24 ; then + # not in range + AC_MSG_ERROR($error_window_size) + fi + AC_DEFINE_UNQUOTED(ECMULT_WINDOW_SIZE, $set_ecmult_window, [Set window size for ecmult precomputation]) + ;; +esac + +# Set ecmult gen precision +if test x"$req_ecmult_gen_precision" = x"auto"; then + set_ecmult_gen_precision=4 +else + set_ecmult_gen_precision=$req_ecmult_gen_precision +fi + +case $set_ecmult_gen_precision in +2|4|8) + AC_DEFINE_UNQUOTED(ECMULT_GEN_PREC_BITS, $set_ecmult_gen_precision, [Set ecmult gen precision bits]) + ;; +*) + AC_MSG_ERROR(['ecmult gen precision not 2, 4, 8 or "auto"']) + ;; +esac + +if test x"$enable_valgrind" = x"yes"; then + SECP_INCLUDES="$SECP_INCLUDES $VALGRIND_CPPFLAGS" +fi + +# Add -Werror and similar flags passed from the outside (for testing, e.g., in CI). +# We don't want to set the user variable CFLAGS in CI because this would disable +# autoconf's logic for setting default CFLAGS, which we would like to test in CI. +SECP_CFLAGS="$SECP_CFLAGS $WERROR_CFLAGS" + +### +### Handle module options +### + +if test x"$enable_module_ecdh" = x"yes"; then + AC_DEFINE(ENABLE_MODULE_ECDH, 1, [Define this symbol to enable the ECDH module]) +fi + +if test x"$enable_module_recovery" = x"yes"; then + AC_DEFINE(ENABLE_MODULE_RECOVERY, 1, [Define this symbol to enable the ECDSA pubkey recovery module]) +fi + +if test x"$enable_module_schnorrsig" = x"yes"; then + AC_DEFINE(ENABLE_MODULE_SCHNORRSIG, 1, [Define this symbol to enable the schnorrsig module]) + enable_module_extrakeys=yes +fi + +# Test if extrakeys is set after the schnorrsig module to allow the schnorrsig +# module to set enable_module_extrakeys=yes +if test x"$enable_module_extrakeys" = x"yes"; then + AC_DEFINE(ENABLE_MODULE_EXTRAKEYS, 1, [Define this symbol to enable the extrakeys module]) +fi + +if test x"$enable_external_default_callbacks" = x"yes"; then + AC_DEFINE(USE_EXTERNAL_DEFAULT_CALLBACKS, 1, [Define this symbol if an external implementation of the default callbacks is used]) +fi + +### +### Check for --enable-experimental if necessary +### + +if test x"$enable_experimental" = x"yes"; then + AC_MSG_NOTICE([******]) + AC_MSG_NOTICE([WARNING: experimental build]) + AC_MSG_NOTICE([Experimental features do not have stable APIs or properties, and may not be safe for production use.]) + AC_MSG_NOTICE([******]) +else + if test x"$set_asm" = x"arm"; then + AC_MSG_ERROR([ARM assembly optimization is experimental. Use --enable-experimental to allow.]) + fi +fi + +### +### Generate output +### + +AC_CONFIG_HEADERS([src/libsecp256k1-config.h]) +AC_CONFIG_FILES([Makefile libsecp256k1.pc]) +AC_SUBST(SECP_INCLUDES) +AC_SUBST(SECP_LIBS) +AC_SUBST(SECP_TEST_LIBS) +AC_SUBST(SECP_TEST_INCLUDES) +AC_SUBST(SECP_CFLAGS) +AM_CONDITIONAL([ENABLE_COVERAGE], [test x"$enable_coverage" = x"yes"]) +AM_CONDITIONAL([USE_TESTS], [test x"$enable_tests" != x"no"]) +AM_CONDITIONAL([USE_EXHAUSTIVE_TESTS], [test x"$enable_exhaustive_tests" != x"no"]) +AM_CONDITIONAL([USE_EXAMPLES], [test x"$enable_examples" != x"no"]) +AM_CONDITIONAL([USE_BENCHMARK], [test x"$enable_benchmark" = x"yes"]) +AM_CONDITIONAL([ENABLE_MODULE_ECDH], [test x"$enable_module_ecdh" = x"yes"]) +AM_CONDITIONAL([ENABLE_MODULE_RECOVERY], [test x"$enable_module_recovery" = x"yes"]) +AM_CONDITIONAL([ENABLE_MODULE_EXTRAKEYS], [test x"$enable_module_extrakeys" = x"yes"]) +AM_CONDITIONAL([ENABLE_MODULE_SCHNORRSIG], [test x"$enable_module_schnorrsig" = x"yes"]) +AM_CONDITIONAL([USE_EXTERNAL_ASM], [test x"$enable_external_asm" = x"yes"]) +AM_CONDITIONAL([USE_ASM_ARM], [test x"$set_asm" = x"arm"]) +AM_CONDITIONAL([BUILD_WINDOWS], [test "$build_windows" = "yes"]) +AC_SUBST(LIB_VERSION_CURRENT, _LIB_VERSION_CURRENT) +AC_SUBST(LIB_VERSION_REVISION, _LIB_VERSION_REVISION) +AC_SUBST(LIB_VERSION_AGE, _LIB_VERSION_AGE) + +AC_OUTPUT + +echo +echo "Build Options:" +echo " with external callbacks = $enable_external_default_callbacks" +echo " with benchmarks = $enable_benchmark" +echo " with tests = $enable_tests" +echo " with coverage = $enable_coverage" +echo " with examples = $enable_examples" +echo " module ecdh = $enable_module_ecdh" +echo " module recovery = $enable_module_recovery" +echo " module extrakeys = $enable_module_extrakeys" +echo " module schnorrsig = $enable_module_schnorrsig" +echo +echo " asm = $set_asm" +echo " ecmult window size = $set_ecmult_window" +echo " ecmult gen prec. bits = $set_ecmult_gen_precision" +# Hide test-only options unless they're used. +if test x"$set_widemul" != xauto; then +echo " wide multiplication = $set_widemul" +fi +echo +echo " valgrind = $enable_valgrind" +echo " CC = $CC" +echo " CPPFLAGS = $CPPFLAGS" +echo " SECP_CFLAGS = $SECP_CFLAGS" +echo " CFLAGS = $CFLAGS" +echo " LDFLAGS = $LDFLAGS" |