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configure.ac
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dnl require autoconf 2.60 (AS_ECHO/AS_ECHO_N)
AC_PREREQ([2.60])
define(_CLIENT_VERSION_MAJOR, 4)
define(_CLIENT_VERSION_MINOR, 2)
define(_CLIENT_VERSION_REVISION, 0)
define(_CLIENT_VERSION_BUILD, 50)
define(_ZC_BUILD_VAL, m4_if(m4_eval(_CLIENT_VERSION_BUILD < 25), 1, m4_incr(_CLIENT_VERSION_BUILD), m4_eval(_CLIENT_VERSION_BUILD < 50), 1, m4_eval(_CLIENT_VERSION_BUILD - 24), m4_eval(_CLIENT_VERSION_BUILD == 50), 1, , m4_eval(_CLIENT_VERSION_BUILD - 50)))
define(_CLIENT_VERSION_SUFFIX, m4_if(m4_eval(_CLIENT_VERSION_BUILD < 25), 1, _CLIENT_VERSION_REVISION-beta$1, m4_eval(_CLIENT_VERSION_BUILD < 50), 1, _CLIENT_VERSION_REVISION-rc$1, m4_eval(_CLIENT_VERSION_BUILD == 50), 1, _CLIENT_VERSION_REVISION, _CLIENT_VERSION_REVISION-$1)))
define(_CLIENT_VERSION_IS_RELEASE, true)
define(_COPYRIGHT_YEAR, 2021)
AC_INIT([Zcash],[_CLIENT_VERSION_MAJOR._CLIENT_VERSION_MINOR._CLIENT_VERSION_SUFFIX(_ZC_BUILD_VAL)],[https://github.com/zcash/zcash/issues],[zcash])
AC_CONFIG_SRCDIR([src/main.cpp])
AC_CONFIG_HEADERS([src/config/bitcoin-config.h])
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_MACRO_DIR([build-aux/m4])
BITCOIN_DAEMON_NAME=zcashd
BITCOIN_CLI_NAME=zcash-cli
BITCOIN_TX_NAME=zcash-tx
dnl Unless the user specified ARFLAGS, force it to be cr
AC_ARG_VAR(ARFLAGS, [Flags for the archiver, defaults to <cr> if not set])
if test "x${ARFLAGS+set}" != "xset"; then
ARFLAGS="cr"
fi
AC_CANONICAL_HOST
AH_TOP([#ifndef BITCOIN_CONFIG_H])
AH_TOP([#define BITCOIN_CONFIG_H])
AH_BOTTOM([#endif //BITCOIN_CONFIG_H])
dnl faketime breaks configure and is only needed for make. Disable it here.
unset FAKETIME
dnl Automake init set-up and checks
AM_INIT_AUTOMAKE([no-define subdir-objects foreign tar-pax])
dnl faketime messes with timestamps and causes configure to be re-run.
dnl --disable-maintainer-mode can be used to bypass this.
AM_MAINTAINER_MODE([enable])
dnl make the compilation flags quiet unless V=1 is used
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
dnl Compiler checks (here before libtool).
if test "x${CXXFLAGS+set}" = "xset"; then
CXXFLAGS_overridden=yes
else
CXXFLAGS_overridden=no
fi
AC_PROG_CXX
m4_ifdef([AC_PROG_OBJCXX],[AC_PROG_OBJCXX])
dnl By default, libtool for mingw refuses to link static libs into a dll for
dnl fear of mixing pic/non-pic objects, and import/export complications. Since
dnl we have those under control, re-enable that functionality.
case $host in
*mingw*)
lt_cv_deplibs_check_method="pass_all"
;;
esac
dnl Require C++17 compiler (no GNU extensions)
AX_CXX_COMPILE_STDCXX([17], [noext], [mandatory])
dnl Check if -latomic is required for <std::atomic>
CHECK_ATOMIC
dnl Libtool init checks.
LT_INIT([pic-only])
dnl Zcash macros for required programs. Configure exits with error if
dnl they are not detected.
AC_DEFUN(
ZC_REQUIRE_TOOL,
[
AC_PATH_TOOL($1, $2, $2_notfound)
if test x${$1} = x$2_notfound
then
AC_MSG_ERROR("Required tool $2 was not found")
fi
]
)
AC_DEFUN(
ZC_REQUIRE_PROG,
[
AC_PATH_PROG($1, $2, $2_notfound)
if test x${$1} = x$2_notfound
then
AC_MSG_ERROR("Required program $2 was not found")
fi
]
)
dnl Check/return PATH for base programs.
dnl Required tools and programs:
ZC_REQUIRE_TOOL(AR, ar)
ZC_REQUIRE_TOOL(RANLIB, ranlib)
ZC_REQUIRE_TOOL(STRIP, strip)
ZC_REQUIRE_PROG([GIT], [git])
ZC_REQUIRE_PROG(RUSTC, rustc)
ZC_REQUIRE_PROG(CARGO, cargo)
dnl This one is still optional and checked by complicated logic below:
AC_PATH_PROG(CCACHE,ccache)
dnl This one is not currently used anywhere, thus not required:
AC_PATH_PROG(XGETTEXT,xgettext)
ZC_REQUIRE_PROG(HEXDUMP,hexdump)
AC_PATH_PROG(READELF,readelf)
ZC_REQUIRE_TOOL(CPPFILT,c++filt)
AC_ARG_ENABLE([online-rust],
[AS_HELP_STRING([--enable-online-rust],
[enable Rust to fetch dependencies from the network (default is to use vendored dependencies)])],
[enable_online_rust=$enableval],
[enable_online_rust=no])
AM_CONDITIONAL(ENABLE_ONLINE_RUST, test "$enable_online_rust" != no)
# Enable wallet
AC_ARG_ENABLE([wallet],
[AS_HELP_STRING([--disable-wallet],
[disable wallet (enabled by default)])],
[enable_wallet=$enableval],
[enable_wallet=yes])
AC_ARG_ENABLE([mining],
[AS_HELP_STRING([--enable-mining],
[enable mining (default is yes)])],
[enable_mining=$enableval],
[enable_mining=yes])
AC_ARG_ENABLE(tests,
AS_HELP_STRING([--disable-tests],[do not compile tests (default is to compile)]),
[use_tests=$enableval],
[use_tests=yes])
AC_ARG_ENABLE(bench,
AS_HELP_STRING([--enable-bench],[compile benchmarks (default is yes)]),
[use_bench=$enableval],
[use_bench=yes])
AC_ARG_ENABLE([fuzz-main],
[AS_HELP_STRING([--enable-fuzz-main],
[Replace main() with a stub for fuzzing (default is no)])],
[use_fuzz_main=$enableval],
[use_fuzz_main=no])
AC_ARG_ENABLE([hardening],
[AS_HELP_STRING([--disable-hardening],
[do not attempt to harden the resulting executables (default is to harden when possible)])],
[use_hardening=$enableval],
[use_hardening=auto])
AC_ARG_ENABLE([reduce-exports],
[AS_HELP_STRING([--enable-reduce-exports],
[attempt to reduce exported symbols in the resulting executables (default is no)])],
[use_reduce_exports=$enableval],
[use_reduce_exports=no])
AC_ARG_ENABLE([ccache],
[AS_HELP_STRING([--disable-ccache],
[do not use ccache for building (default is to use if found)])],
[use_ccache=$enableval],
[use_ccache=auto])
AC_ARG_ENABLE([lcov],
[AS_HELP_STRING([--enable-lcov],
[enable lcov testing (default is no)])],
[use_lcov=yes],
[use_lcov=no])
AC_ARG_ENABLE([glibc-back-compat],
[AS_HELP_STRING([--enable-glibc-back-compat],
[enable backwards compatibility with glibc])],
[use_glibc_compat=$enableval],
[use_glibc_compat=no])
AC_ARG_ENABLE([zmq],
[AS_HELP_STRING([--disable-zmq],
[disable ZMQ notifications])],
[use_zmq=$enableval],
[use_zmq=yes])
AC_ARG_WITH([protoc-bindir],[AS_HELP_STRING([--with-protoc-bindir=BIN_DIR],[specify protoc bin path])], [protoc_bin_path=$withval], [])
AC_ARG_ENABLE(man,
[AS_HELP_STRING([--disable-man],
[do not install man pages (default is to install)])],,
enable_man=yes)
AM_CONDITIONAL(ENABLE_MAN, test "$enable_man" != no)
# Enable debug
AC_ARG_ENABLE([debug],
[AS_HELP_STRING([--enable-debug],
[use compiler flags and macros suited for debugging (default is no)])],
[enable_debug=$enableval],
[enable_debug=no])
# Enable different -fsanitize options
AC_ARG_WITH([sanitizers],
[AS_HELP_STRING([--with-sanitizers],
[comma separated list of extra sanitizers to build with (default is none enabled)])],
[use_sanitizers=$withval])
# Enable gprof profiling
AC_ARG_ENABLE([gprof],
[AS_HELP_STRING([--enable-gprof],
[use gprof profiling compiler flags (default is no)])],
[enable_gprof=$enableval],
[enable_gprof=no])
# Turn warnings into errors
AC_ARG_ENABLE([werror],
[AS_HELP_STRING([--enable-werror],
[Treat all compiler warnings as errors (default is no)])],
[enable_werror=$enableval],
[enable_werror=no])
AC_LANG_PUSH([C++])
AX_CHECK_COMPILE_FLAG([-Werror],[CXXFLAG_WERROR="-Werror"],[CXXFLAG_WERROR=""])
if test "x$enable_debug" = xyes; then
# Clear default -g -O2 flags
if test "x$CXXFLAGS_overridden" = xno; then
CXXFLAGS=""
fi
# Disable all optimizations
AX_CHECK_COMPILE_FLAG([-O0], [[DEBUG_CXXFLAGS="$DEBUG_CXXFLAGS -O0"]],,[[$CXXFLAG_WERROR]])
# Prefer -g3, fall back to -g if that is unavailable.
AX_CHECK_COMPILE_FLAG(
[-g3],
[[DEBUG_CXXFLAGS="$DEBUG_CXXFLAGS -g3"]],
[AX_CHECK_COMPILE_FLAG([-g],[[DEBUG_CXXFLAGS="$DEBUG_CXXFLAGS -g"]],,[[$CXXFLAG_WERROR]])],
[[$CXXFLAG_WERROR]])
AX_CHECK_PREPROC_FLAG([-DDEBUG],[[DEBUG_CPPFLAGS="$DEBUG_CPPFLAGS -DDEBUG"]],,[[$CXXFLAG_WERROR]])
AX_CHECK_PREPROC_FLAG([-DDEBUG_LOCKORDER],[[DEBUG_CPPFLAGS="$DEBUG_CPPFLAGS -DDEBUG_LOCKORDER"]],,[[$CXXFLAG_WERROR]])
AX_CHECK_COMPILE_FLAG([-ftrapv],[DEBUG_CXXFLAGS="$DEBUG_CXXFLAGS -ftrapv"],,[[$CXXFLAG_WERROR]])
else
# Even with enable_debug=no we build with standard debug symbols
AX_CHECK_COMPILE_FLAG([-g],[[DEBUG_CXXFLAGS="$DEBUG_CXXFLAGS -g"]],,[[$CXXFLAG_WERROR]])
# -ftrapv and -fwrapv conflict, so we only set this if enable_debug=no
AX_CHECK_COMPILE_FLAG([-fwrapv],[CXXFLAGS="$CXXFLAGS -fwrapv"],,[[$CXXFLAG_WERROR]])
fi
if test x$use_sanitizers != x; then
# First check if the compiler accepts flags. If an incompatible pair like
# -fsanitize=address,thread is used here, this check will fail. This will also
# fail if a bad argument is passed, e.g. -fsanitize=undfeined
AX_CHECK_COMPILE_FLAG(
[[-fsanitize=$use_sanitizers]],
[[SANITIZER_CXXFLAGS=-fsanitize=$use_sanitizers]],
[AC_MSG_ERROR([compiler did not accept requested flags])])
# Some compilers (e.g. GCC) require additional libraries like libasan,
# libtsan, libubsan, etc. Make sure linking still works with the sanitize
# flag. This is a separate check so we can give a better error message when
# the sanitize flags are supported by the compiler but the actual sanitizer
# libs are missing.
AX_CHECK_LINK_FLAG(
[[-fsanitize=$use_sanitizers]],
[[SANITIZER_LDFLAGS=-fsanitize=$use_sanitizers]],
[AC_MSG_ERROR([linker did not accept requested flags, you are missing required libraries])])
AX_CHECK_COMPILE_FLAG(
[-fno-omit-frame-pointer],
[SANITIZER_CXXFLAGS="$SANITIZER_CXXFLAGS -fno-omit-frame-pointer"],
[AC_MSG_ERROR(Cannot enable -fno-omit-frame-pointer)])
# libc/libstdc++ static linking is not supported for TSan
case $use_sanitizers in
*thread*)
;;
*)
AX_CHECK_LINK_FLAG(
[-static-libstdc++],
[SANITIZER_LDFLAGS="$SANITIZER_LDFLAGS -static-libstdc++"],
[AC_MSG_ERROR(Cannot statically link -static-libstdc++)])
;;
esac
case $use_sanitizers in
*address*)
AX_CHECK_LINK_FLAG(
[-static-libasan],
[SANITIZER_LDFLAGS="$SANITIZER_LDFLAGS -static-libasan"],
[AC_MSG_ERROR(Cannot statically link -static-libasan)])
;;
*)
;;
esac
fi
ERROR_CXXFLAGS=
if test "x$enable_werror" = "xyes"; then
if test "x$CXXFLAG_WERROR" = "x"; then
AC_MSG_ERROR("enable-werror set but -Werror is not usable")
fi
ERROR_CXXFLAGS="$ERROR_CXXFLAGS -Werror"
fi
if test "x$CXXFLAGS_overridden" = "xno"; then
AX_CHECK_COMPILE_FLAG([-Wall],[CXXFLAGS="$CXXFLAGS -Wall"],,[[$CXXFLAG_WERROR]])
AX_CHECK_COMPILE_FLAG([-Wextra],[CXXFLAGS="$CXXFLAGS -Wextra"],,[[$CXXFLAG_WERROR]])
AX_CHECK_COMPILE_FLAG([-Wformat],[CXXFLAGS="$CXXFLAGS -Wformat"],,[[$CXXFLAG_WERROR]])
AX_CHECK_COMPILE_FLAG([-Wvla],[CXXFLAGS="$CXXFLAGS -Wvla"],,[[$CXXFLAG_WERROR]])
AX_CHECK_COMPILE_FLAG([-Wformat-security],[CXXFLAGS="$CXXFLAGS -Wformat-security"],,[[$CXXFLAG_WERROR]])
## Some compilers (gcc) ignore unknown -Wno-* options, but warn about all
## unknown options if any other warning is produced. Test the -Wfoo case, and
## set the -Wno-foo case if it works.
AX_CHECK_COMPILE_FLAG([-Wunused-parameter],[CXXFLAGS="$CXXFLAGS -Wno-unused-parameter"],,[[$CXXFLAG_WERROR]])
AX_CHECK_COMPILE_FLAG([-Wself-assign],[CXXFLAGS="$CXXFLAGS -Wno-self-assign"],,[[$CXXFLAG_WERROR]])
AX_CHECK_COMPILE_FLAG([-Wunused-local-typedef],[CXXFLAGS="$CXXFLAGS -Wno-unused-local-typedef"],,[[$CXXFLAG_WERROR]])
AX_CHECK_COMPILE_FLAG([-Wdeprecated-register],[CXXFLAGS="$CXXFLAGS -Wno-deprecated-register"],,[[$CXXFLAG_WERROR]])
# Check for optional instruction set support. Enabling these does _not_ imply that all code will
# be compiled with them, rather that specific objects/libs may use them after checking for runtime
# compatibility.
AX_CHECK_COMPILE_FLAG([-msse4.2],[[SSE42_CXXFLAGS="-msse4.2"]],,[[$CXXFLAG_WERROR]])
fi
TEMP_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$CXXFLAGS $SSE42_CXXFLAGS"
AC_MSG_CHECKING(for assembler crc32 support)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <stdint.h>
#if defined(_MSC_VER)
#include <intrin.h>
#elif defined(__GNUC__) && defined(__SSE4_2__)
#include <nmmintrin.h>
#endif
]],[[
uint64_t l = 0;
l = _mm_crc32_u8(l, 0);
l = _mm_crc32_u32(l, 0);
l = _mm_crc32_u64(l, 0);
return l;
]])],
[ AC_MSG_RESULT(yes); enable_hwcrc32=yes],
[ AC_MSG_RESULT(no)]
)
CXXFLAGS="$TEMP_CXXFLAGS"
CPPFLAGS="$CPPFLAGS -DHAVE_BUILD_INFO -D__STDC_FORMAT_MACROS"
AC_ARG_WITH([utils],
[AS_HELP_STRING([--with-utils],
[build zcash-cli zcash-tx (default=yes)])],
[build_bitcoin_utils=$withval],
[build_bitcoin_utils=yes])
AC_ARG_WITH([libs],
[AS_HELP_STRING([--with-libs],
[build libraries (default=no)])],
[build_bitcoin_libs=$withval],
[build_bitcoin_libs=no])
AC_ARG_WITH([daemon],
[AS_HELP_STRING([--with-daemon],
[build bitcoind daemon (default=yes)])],
[build_bitcoind=$withval],
[build_bitcoind=yes])
use_pkgconfig=yes
case $host in
*mingw*)
#pkgconfig does more harm than good with MinGW
use_pkgconfig=no
TARGET_OS=windows
AC_CHECK_LIB([mingwthrd], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([kernel32], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([user32], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([gdi32], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([comdlg32], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([winspool], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([winmm], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([shell32], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([comctl32], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([ole32], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([oleaut32], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([uuid], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([rpcrt4], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([advapi32], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([ws2_32], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([mswsock], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([shlwapi], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([iphlpapi], [main],, AC_MSG_ERROR(lib missing))
AC_CHECK_LIB([crypt32], [main],, AC_MSG_ERROR(lib missing))
# -static is interpreted by libtool, where it has a different meaning.
# In libtool-speak, it's -all-static.
AX_CHECK_LINK_FLAG([[-static]],[LIBTOOL_APP_LDFLAGS="$LIBTOOL_APP_LDFLAGS -all-static"])
AC_PATH_PROG([MAKENSIS], [makensis], none)
if test x$MAKENSIS = xnone; then
AC_MSG_WARN("makensis not found. Cannot create installer.")
fi
ZC_REQUIRE_TOOL(WINDRES, windres)
CPPFLAGS="$CPPFLAGS -D_MT -DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB"
LEVELDB_TARGET_FLAGS="-DOS_WINDOWS"
if test "x$CXXFLAGS_overridden" = "xno"; then
CXXFLAGS="$CXXFLAGS -w"
fi
case $host in
i?86-*) WINDOWS_BITS=32 ;;
x86_64-*) WINDOWS_BITS=64 ;;
*) AC_MSG_ERROR("Could not determine win32/win64 for installer") ;;
esac
AC_SUBST(WINDOWS_BITS)
dnl libtool insists upon adding -nostdlib and a list of objects/libs to link against.
dnl That breaks our ability to build dll's with static libgcc/libstdc++/libssp. Override
dnl its command here, with the predeps/postdeps removed, and -static inserted. Postdeps are
dnl also overridden to prevent their insertion later.
dnl This should only affect dll's.
archive_cmds_CXX="\$CC -shared \$libobjs \$deplibs \$compiler_flags -static -o \$output_objdir/\$soname \${wl}--enable-auto-image-base -Xlinker --out-implib -Xlinker \$lib"
postdeps_CXX=
;;
*darwin*)
TARGET_OS=darwin
LEVELDB_TARGET_FLAGS="-DOS_MACOSX"
if test x$cross_compiling != xyes; then
BUILD_OS=darwin
AC_CHECK_PROG([PORT],port, port)
if test x$PORT = xport; then
dnl add default macports paths
CPPFLAGS="$CPPFLAGS -isystem /opt/local/include"
LIBS="$LIBS -L/opt/local/lib"
if test -d /opt/local/include/db62; then
CPPFLAGS="$CPPFLAGS -I/opt/local/include/db62"
LIBS="$LIBS -L/opt/local/lib/db62"
fi
fi
AC_CHECK_PROG([BREW],brew, brew)
if test x$BREW = xbrew; then
dnl These Homebrew packages may be keg-only, meaning that they won't be found
dnl in expected paths because they may conflict with system files. Ask
dnl Homebrew where each one is located, then adjust paths accordingly.
dnl It's safe to add these paths even if the functionality is disabled by
dnl the user (--without-wallet for example).
bdb_prefix=`$BREW --prefix berkeley-db4 2>/dev/null`
if test x$bdb_prefix != x; then
CPPFLAGS="$CPPFLAGS -I$bdb_prefix/include"
LIBS="$LIBS -L$bdb_prefix/lib"
fi
fi
else
case $build_os in
*darwin*)
BUILD_OS=darwin
;;
*)
AC_PATH_TOOL([INSTALLNAMETOOL], [install_name_tool], install_name_tool)
AC_PATH_TOOL([OTOOL], [otool], otool)
AC_PATH_PROGS([GENISOIMAGE], [genisoimage mkisofs],genisoimage)
dnl libtool will try to strip the static lib, which is a problem for
dnl cross-builds because strip attempts to call a hard-coded ld,
dnl which may not exist in the path. Stripping the .a is not
dnl necessary, so just disable it.
old_striplib=
;;
esac
fi
AX_CHECK_LINK_FLAG([[-Wl,-headerpad_max_install_names]], [LDFLAGS="$LDFLAGS -Wl,-headerpad_max_install_names"])
CPPFLAGS="$CPPFLAGS -DMAC_OSX"
OBJCXXFLAGS="$CXXFLAGS"
;;
*linux*)
LEVELDB_TARGET_FLAGS="-DOS_LINUX"
;;
*freebsd*)
LEVELDB_TARGET_FLAGS="-DOS_FREEBSD"
;;
*)
OTHER_OS=`echo ${host_os} | awk '{print toupper($0)}'`
LEVELDB_TARGET_FLAGS="-DOS_${OTHER_OS}"
;;
esac
if test x$use_pkgconfig = xyes; then
m4_ifndef([PKG_PROG_PKG_CONFIG], [AC_MSG_ERROR(PKG_PROG_PKG_CONFIG macro not found. Please install pkg-config and re-run autogen.sh.)])
m4_ifdef([PKG_PROG_PKG_CONFIG], [
PKG_PROG_PKG_CONFIG
if test x"$PKG_CONFIG" = "x"; then
AC_MSG_ERROR(pkg-config not found.)
fi
])
fi
if test x$use_lcov = xyes; then
ZC_REQUIRE_TOOL(GCOV, gcov)
ZC_REQUIRE_PROG(LCOV, lcov)
ZC_REQUIRE_PROG(GENHTML, genhtml)
LCOV="$LCOV --gcov-tool=$GCOV --rc lcov_branch_coverage=1"
GENHTML="$GENHTML --branch-coverage"
AX_CHECK_COMPILE_FLAG([--coverage],[CXXFLAGS="$CXXFLAGS --coverage"],
[AC_MSG_ERROR("lcov testing requested but --coverage flag does not work")])
fi
dnl Check for endianness
AC_C_BIGENDIAN
dnl Check for pthread compile/link requirements
AX_PTHREAD
# The following macro will add the necessary defines to bitcoin-config.h, but
# they also need to be passed down to any subprojects. Pull the results out of
# the cache and add them to CPPFLAGS.
AC_SYS_LARGEFILE
# detect POSIX or GNU variant of strerror_r
AC_FUNC_STRERROR_R
if test x$ac_cv_sys_file_offset_bits != x &&
test x$ac_cv_sys_file_offset_bits != xno &&
test x$ac_cv_sys_file_offset_bits != xunknown; then
CPPFLAGS="$CPPFLAGS -D_FILE_OFFSET_BITS=$ac_cv_sys_file_offset_bits"
fi
if test x$ac_cv_sys_large_files != x &&
test x$ac_cv_sys_large_files != xno &&
test x$ac_cv_sys_large_files != xunknown; then
CPPFLAGS="$CPPFLAGS -D_LARGE_FILES=$ac_cv_sys_large_files"
fi
AX_CHECK_LINK_FLAG([[-Wl,--large-address-aware]], [LDFLAGS="$LDFLAGS -Wl,--large-address-aware"])
AX_GCC_FUNC_ATTRIBUTE([visibility])
AX_GCC_FUNC_ATTRIBUTE([dllexport])
AX_GCC_FUNC_ATTRIBUTE([dllimport])
if test x$use_glibc_compat != xno; then
#glibc absorbed clock_gettime in 2.17. librt (its previous location) is safe to link
#in anyway for back-compat.
AC_CHECK_LIB([rt],[clock_gettime],, AC_MSG_ERROR(lib missing))
#__fdelt_chk's params and return type have changed from long unsigned int to long int.
# See which one is present here.
AC_MSG_CHECKING(__fdelt_chk type)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#ifdef _FORTIFY_SOURCE
#undef _FORTIFY_SOURCE
#endif
#define _FORTIFY_SOURCE 2
#include <sys/select.h>
extern "C" long unsigned int __fdelt_warn(long unsigned int);]],[[]])],
[ fdelt_type="long unsigned int"],
[ fdelt_type="long int"])
AC_MSG_RESULT($fdelt_type)
AC_DEFINE_UNQUOTED(FDELT_TYPE, $fdelt_type,[parameter and return value type for __fdelt_chk])
else
AC_SEARCH_LIBS([clock_gettime],[rt])
fi
if test "x$enable_gprof" = xyes; then
dnl -pg is incompatible with -pie. Since hardening and profiling together doesn't make sense,
dnl we simply make them mutually exclusive here. Additionally, hardened toolchains may force
dnl -pie by default, in which case it needs to be turned off with -no-pie.
if test x$use_hardening = xyes; then
AC_MSG_ERROR(gprof profiling is not compatible with hardening. Reconfigure with --disable-hardening or --disable-gprof)
fi
use_hardening=no
AX_CHECK_COMPILE_FLAG([-pg],[GPROF_CXXFLAGS="-pg"],
[AC_MSG_ERROR(gprof profiling requested but not available)], [[$CXXFLAG_WERROR]])
AX_CHECK_LINK_FLAG([[-no-pie]], [GPROF_LDFLAGS="-no-pie"])
AX_CHECK_LINK_FLAG([[-pg]],[GPROF_LDFLAGS="$GPROF_LDFLAGS -pg"],
[AC_MSG_ERROR(gprof profiling requested but not available)], [[$GPROF_LDFLAGS]])
fi
if test x$TARGET_OS != xwindows; then
# All windows code is PIC, forcing it on just adds useless compile warnings
AX_CHECK_COMPILE_FLAG([-fPIC],[PIC_FLAGS="-fPIC"])
fi
if test x$use_fuzz_main == xyes; then
CFLAGS="$CFLAGS -DZCASH_FUZZ=1"
CXXFLAGS="$CXXFLAGS -DZCASH_FUZZ=1"
fi
if test x$use_hardening != xno; then
use_hardening=yes
AX_CHECK_COMPILE_FLAG([-Wformat],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -Wformat"],[AC_MSG_ERROR(Cannot enable -Wformat)])
AX_CHECK_COMPILE_FLAG([-Wformat-security],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -Wformat-security"],[AC_MSG_ERROR(Cannot enable -Wformat-security)],[-Wformat])
AX_CHECK_COMPILE_FLAG([-Wstack-protector],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -Wstack-protector"],[AC_MSG_ERROR(Cannot enable -Wstack-protector)])
AX_CHECK_COMPILE_FLAG([-fstack-protector-all],[HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fstack-protector-all"],[AC_MSG_ERROR(Cannot enable -fstack-protector-all)])
AX_CHECK_PREPROC_FLAG([-D_FORTIFY_SOURCE=2],[
AX_CHECK_PREPROC_FLAG([-U_FORTIFY_SOURCE],[
HARDENED_CPPFLAGS="$HARDENED_CPPFLAGS -U_FORTIFY_SOURCE"
],[AC_MSG_ERROR(Cannot enable -U_FORTIFY_SOURCE)])
HARDENED_CPPFLAGS="$HARDENED_CPPFLAGS -D_FORTIFY_SOURCE=2"
],[AC_MSG_ERROR(Cannot enable -D_FORTIFY_SOURCE=2)])
if test x$TARGET_OS = xdarwin || test x$TARGET_OS = xwindows; then
# Xcode's ld (at least ld64-302.3) doesn't support -z
# mingw-w64's ld (at least mingw-w64 4.0.4-2) also appears to not support -z
AX_CHECK_LINK_FLAG([[-Wl,-z,relro]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,relro"],[AC_MSG_WARN(Cannot enable RELRO)])
AX_CHECK_LINK_FLAG([[-Wl,-z,now]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,now"],[AC_MSG_WARN(Cannot enable BIND_NOW)])
else
AX_CHECK_LINK_FLAG([[-Wl,-z,relro]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,relro"],[AC_MSG_ERROR(Cannot enable RELRO)])
AX_CHECK_LINK_FLAG([[-Wl,-z,now]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,now"],[AC_MSG_ERROR(Cannot enable BIND_NOW)])
fi
if test x$TARGET_OS != xwindows; then
# All windows code is PIC, forcing it on just adds useless compile warnings
AX_CHECK_COMPILE_FLAG([-fPIE],[PIE_FLAGS="-fPIE"],[AC_MSG_ERROR(Cannot enable -fPIE)])
if test x$BUILD_OS = xdarwin; then
AX_CHECK_LINK_FLAG([[-Wl,-pie]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-pie"],[AC_MSG_ERROR(Cannot enable -Wl,-pie)])
else
AX_CHECK_LINK_FLAG([[-pie]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -pie"],[AC_MSG_ERROR(Cannot enable -pie)])
fi
else
# These are only available on Windows.
AX_CHECK_LINK_FLAG([[-Wl,--dynamicbase]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,--dynamicbase"],[AC_MSG_ERROR(Cannot enable --dynamicbase)])
AX_CHECK_LINK_FLAG([[-Wl,--nxcompat]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,--nxcompat"],[AC_MSG_ERROR(Cannot enable --nxcompat)])
AX_CHECK_LINK_FLAG([[-Wl,--high-entropy-va]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,--high-entropy-va"],[AC_MSG_ERROR(Cannot enable ASLR)])
fi
case $host in
*mingw*)
AC_CHECK_LIB([ssp], [main],, AC_MSG_ERROR(lib missing))
;;
esac
fi
dnl this flag screws up non-darwin gcc even when the check fails. special-case it.
if test x$TARGET_OS = xdarwin; then
AX_CHECK_LINK_FLAG([[-Wl,-dead_strip]], [LDFLAGS="$LDFLAGS -Wl,-dead_strip"])
fi
AC_CHECK_HEADERS([endian.h sys/endian.h byteswap.h stdio.h stdlib.h unistd.h strings.h sys/types.h sys/stat.h sys/select.h sys/prctl.h])
AC_SEARCH_LIBS([getaddrinfo_a], [anl], [AC_DEFINE(HAVE_GETADDRINFO_A, 1, [Define this symbol if you have getaddrinfo_a])])
AC_SEARCH_LIBS([inet_pton], [nsl resolv], [AC_DEFINE(HAVE_INET_PTON, 1, [Define this symbol if you have inet_pton])])
AC_CHECK_DECLS([strnlen])
AC_CHECK_DECLS([le16toh, le32toh, le64toh, htole16, htole32, htole64, be16toh, be32toh, be64toh, htobe16, htobe32, htobe64],,,
[#if HAVE_ENDIAN_H
#include <endian.h>
#elif HAVE_SYS_ENDIAN_H
#include <sys/endian.h>
#endif])
AC_CHECK_DECLS([bswap_16, bswap_32, bswap_64],,,
[#if HAVE_BYTESWAP_H
#include <byteswap.h>
#endif])
dnl Check for MSG_NOSIGNAL
AC_MSG_CHECKING(for MSG_NOSIGNAL)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/socket.h>]],
[[ int f = MSG_NOSIGNAL; ]])],
[ AC_MSG_RESULT(yes); AC_DEFINE(HAVE_MSG_NOSIGNAL, 1,[Define this symbol if you have MSG_NOSIGNAL]) ],
[ AC_MSG_RESULT(no)]
)
AC_MSG_CHECKING([for visibility attribute])
AC_LINK_IFELSE([AC_LANG_SOURCE([
int foo_def( void ) __attribute__((visibility("default")));
int main(){}
])],
[
AC_DEFINE(HAVE_VISIBILITY_ATTRIBUTE,1,[Define if the visibility attribute is supported.])
AC_MSG_RESULT(yes)
],
[
AC_MSG_RESULT(no)
if test x$use_reduce_exports = xyes; then
AC_MSG_ERROR([Cannot find a working visibility attribute. Use --disable-reduce-exports.])
fi
]
)
if test x$use_reduce_exports = xyes; then
AX_CHECK_COMPILE_FLAG([-fvisibility=hidden],[RE_CXXFLAGS="-fvisibility=hidden"],
[AC_MSG_ERROR([Cannot set default symbol visibility. Use --disable-reduce-exports.])])
fi
LEVELDB_CPPFLAGS=
LIBLEVELDB=
LIBMEMENV=
AM_CONDITIONAL([EMBEDDED_LEVELDB],[true])
AC_SUBST(LEVELDB_CPPFLAGS)
AC_SUBST(LIBLEVELDB)
AC_SUBST(LIBMEMENV)
if test x$enable_wallet != xno; then
dnl Check for libdb_cxx only if wallet enabled
BITCOIN_FIND_BDB62
fi
if test x$build_bitcoin_utils$build_bitcoind$use_tests = xnonono; then
use_boost=no
else
use_boost=yes
fi
if test x$use_boost = xyes; then
dnl Check for boost libs
dnl We need Boost >= 1.62 to fix a potential security bug (https://github.com/zcash/zcash/issues/1241)
AX_BOOST_BASE([1.62])
AX_BOOST_SYSTEM
AX_BOOST_FILESYSTEM
AX_BOOST_PROGRAM_OPTIONS
AX_BOOST_THREAD
AX_BOOST_CHRONO
fi
if test x$use_reduce_exports = xyes; then
CXXFLAGS="$CXXFLAGS $RE_CXXFLAGS"
AX_CHECK_LINK_FLAG([[-Wl,--exclude-libs,ALL]], [RELDFLAGS="-Wl,--exclude-libs,ALL"])
fi
if test x$use_tests = xyes; then
if test x$HEXDUMP = x; then
AC_MSG_ERROR(hexdump is required for tests)
fi
if test x$use_boost = xyes; then
AX_BOOST_UNIT_TEST_FRAMEWORK
dnl Determine if -DBOOST_TEST_DYN_LINK is needed
AC_MSG_CHECKING([for dynamic linked boost test])
TEMP_LIBS="$LIBS"
LIBS="$LIBS $BOOST_LDFLAGS $BOOST_UNIT_TEST_FRAMEWORK_LIB"
TEMP_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS $BOOST_CPPFLAGS"
AC_LINK_IFELSE([AC_LANG_SOURCE([
#define BOOST_TEST_DYN_LINK
#define BOOST_TEST_MAIN
#include <boost/test/unit_test.hpp>
])],
[AC_MSG_RESULT(yes)]
[TESTDEFS="$TESTDEFS -DBOOST_TEST_DYN_LINK"],
[AC_MSG_RESULT(no)])
LIBS="$TEMP_LIBS"
CPPFLAGS="$TEMP_CPPFLAGS"
fi
fi
if test x$use_boost = xyes; then
BOOST_LIBS="$BOOST_LDFLAGS $BOOST_SYSTEM_LIB $BOOST_FILESYSTEM_LIB $BOOST_PROGRAM_OPTIONS_LIB $BOOST_THREAD_LIB $BOOST_CHRONO_LIB"
fi
if test x$use_pkgconfig = xyes; then
: dnl
m4_ifdef(
[PKG_CHECK_MODULES],
[
if test x$build_bitcoin_utils$build_bitcoind$bitcoin_enable_qt$use_tests != xnononono; then
PKG_CHECK_MODULES([EVENT], [libevent],, [AC_MSG_ERROR(libevent not found.)])
if test x$TARGET_OS != xwindows; then
PKG_CHECK_MODULES([EVENT_PTHREADS], [libevent_pthreads],, [AC_MSG_ERROR(libevent_pthreads not found.)])
fi
fi
if test "x$use_zmq" = "xyes"; then
PKG_CHECK_MODULES([ZMQ],[libzmq >= 4],
[AC_DEFINE([ENABLE_ZMQ],[1],[Define to 1 to enable ZMQ functions])],
[AC_DEFINE([ENABLE_ZMQ],[0],[Define to 1 to enable ZMQ functions])
AC_MSG_WARN([libzmq version 4.x or greater not found, disabling])
use_zmq=no])
else
AC_DEFINE_UNQUOTED([ENABLE_ZMQ],[0],[Define to 1 to enable ZMQ functions])
fi
]
)
else
if test x$build_bitcoin_utils$build_bitcoind$bitcoin_enable_qt$use_tests != xnononono; then
AC_CHECK_HEADER([event2/event.h],, AC_MSG_ERROR(libevent headers missing),)
AC_CHECK_LIB([event],[main],EVENT_LIBS=-levent,AC_MSG_ERROR(libevent missing))
if test x$TARGET_OS != xwindows; then
AC_CHECK_LIB([event_pthreads],[main],EVENT_PTHREADS_LIBS=-levent_pthreads,AC_MSG_ERROR(libevent_pthreads missing))
fi
fi
if test "x$use_zmq" = "xyes"; then
AC_CHECK_HEADER([zmq.h],
[AC_DEFINE([ENABLE_ZMQ],[1],[Define to 1 to enable ZMQ functions])],
[AC_MSG_WARN([zmq.h not found, disabling zmq support])
use_zmq=no
AC_DEFINE([ENABLE_ZMQ],[0],[Define to 1 to enable ZMQ functions])])
AC_CHECK_LIB([zmq],[zmq_ctx_shutdown],ZMQ_LIBS=-lzmq,
[AC_MSG_WARN([libzmq >= 4.0 not found, disabling zmq support])
use_zmq=no
AC_DEFINE([ENABLE_ZMQ],[0],[Define to 1 to enable ZMQ functions])])
else
AC_DEFINE_UNQUOTED([ENABLE_ZMQ],[0],[Define to 1 to enable ZMQ functions])
fi
if test "x$use_zmq" = "xyes"; then
dnl Assume libzmq was built for static linking
case $host in
*mingw*)
ZMQ_CFLAGS="$ZMQ_CFLAGS -DZMQ_STATIC"
;;
esac
fi
fi
RUST_LIBS=""
case $host in
*mingw*)
RUST_LIBS="$RUST_LIBS -luserenv"
;;
*)
RUST_LIBS="$RUST_LIBS -ldl"
;;
esac
# Additional Zcash flags
AX_CHECK_COMPILE_FLAG([-fno-strict-aliasing],[CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"])
AX_CHECK_COMPILE_FLAG([-Wno-builtin-declaration-mismatch],[CXXFLAGS="$CXXFLAGS -Wno-builtin-declaration-mismatch"],,[[$CXXFLAG_WERROR]])
LIBZCASH_LIBS="$BOOST_SYSTEM_LIB -lsodium $RUST_LIBS"
AC_MSG_CHECKING([whether to build bitcoind])
AM_CONDITIONAL([BUILD_BITCOIND], [test x$build_bitcoind = xyes])
AC_MSG_RESULT($build_bitcoind)
AC_MSG_CHECKING([whether to build utils (zcash-cli zcash-tx)])
AM_CONDITIONAL([BUILD_BITCOIN_UTILS], [test x$build_bitcoin_utils = xyes])
AC_MSG_RESULT($build_bitcoin_utils)
AC_MSG_CHECKING([whether to build libraries])
AM_CONDITIONAL([BUILD_BITCOIN_LIBS], [test x$build_bitcoin_libs = xyes])
if test x$build_bitcoin_libs = xyes; then
AC_DEFINE(HAVE_CONSENSUS_LIB, 1, [Define this symbol if the consensus lib has been built])
AC_CONFIG_FILES([libzcashconsensus.pc:libzcashconsensus.pc.in])
fi
AC_MSG_RESULT($build_bitcoin_libs)
AC_LANG_POP
if test "x$use_ccache" != "xno"; then
AC_MSG_CHECKING(if ccache should be used)
if test x$CCACHE = x; then
if test "x$use_ccache" = "xyes"; then
AC_MSG_ERROR([ccache not found.]);
else
use_ccache=no
fi
else
use_ccache=yes
CC="$ac_cv_path_CCACHE $CC"
CXX="$ac_cv_path_CCACHE $CXX"
fi
AC_MSG_RESULT($use_ccache)
fi
if test "x$use_ccache" = "xyes"; then
AX_CHECK_PREPROC_FLAG([-Qunused-arguments],[CPPFLAGS="-Qunused-arguments $CPPFLAGS"])
fi
dnl enable wallet
AC_MSG_CHECKING([if wallet should be enabled])
if test x$enable_wallet != xno; then
AC_MSG_RESULT(yes)
AC_DEFINE_UNQUOTED([ENABLE_WALLET],[1],[Define to 1 to enable wallet functions])
else
AC_MSG_RESULT(no)
fi
dnl enable mining
AC_MSG_CHECKING([if mining should be enabled])
if test x$enable_mining != xno; then
AC_MSG_RESULT(yes)
AC_DEFINE(ENABLE_MINING, 1, [Define to 1 to enable mining functions])
else
AC_MSG_RESULT(no)
fi
AM_CONDITIONAL([ENABLE_ZMQ], [test "x$use_zmq" = "xyes"])
AC_MSG_CHECKING([whether to build test_bitcoin])
if test x$use_tests = xyes; then
AC_MSG_RESULT([yes])
BUILD_TEST="yes"
else
AC_MSG_RESULT([no])
BUILD_TEST=""
fi
AC_MSG_CHECKING([whether to reduce exports])
if test x$use_reduce_exports = xyes; then
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
fi
if test x$build_bitcoin_utils$build_bitcoin_libs$build_bitcoind$use_tests = xnononono; then
AC_MSG_ERROR([No targets! Please specify at least one of: --with-utils --with-libs --with-daemon or --enable-tests])
fi
AM_CONDITIONAL([TARGET_DARWIN], [test x$TARGET_OS = xdarwin])
AM_CONDITIONAL([BUILD_DARWIN], [test x$BUILD_OS = xdarwin])
AM_CONDITIONAL([TARGET_WINDOWS], [test x$TARGET_OS = xwindows])
AM_CONDITIONAL([ENABLE_WALLET],[test x$enable_wallet = xyes])
AM_CONDITIONAL([ENABLE_MINING],[test x$enable_mining = xyes])
AM_CONDITIONAL([ENABLE_TESTS],[test x$BUILD_TEST = xyes])
AM_CONDITIONAL([ENABLE_BENCH],[test x$use_bench = xyes])
AM_CONDITIONAL([USE_LCOV],[test x$use_lcov = xyes])
AM_CONDITIONAL([GLIBC_BACK_COMPAT],[test x$use_glibc_compat = xyes])
AM_CONDITIONAL([HARDEN],[test x$use_hardening = xyes])
AM_CONDITIONAL([ENABLE_HWCRC32],[test x$enable_hwcrc32 = xyes])
AC_DEFINE(CLIENT_VERSION_MAJOR, _CLIENT_VERSION_MAJOR, [Major version])
AC_DEFINE(CLIENT_VERSION_MINOR, _CLIENT_VERSION_MINOR, [Minor version])
AC_DEFINE(CLIENT_VERSION_REVISION, _CLIENT_VERSION_REVISION, [Build revision])
AC_DEFINE(CLIENT_VERSION_BUILD, _CLIENT_VERSION_BUILD, [Version Build])
AC_DEFINE(CLIENT_VERSION_IS_RELEASE, _CLIENT_VERSION_IS_RELEASE, [Version is release])
AC_DEFINE(COPYRIGHT_YEAR, _COPYRIGHT_YEAR, [Version is release])
AC_SUBST(CLIENT_VERSION_MAJOR, _CLIENT_VERSION_MAJOR)
AC_SUBST(CLIENT_VERSION_MINOR, _CLIENT_VERSION_MINOR)
AC_SUBST(CLIENT_VERSION_REVISION, _CLIENT_VERSION_REVISION)
AC_SUBST(CLIENT_VERSION_BUILD, _CLIENT_VERSION_BUILD)
AC_SUBST(CLIENT_VERSION_IS_RELEASE, _CLIENT_VERSION_IS_RELEASE)
AC_SUBST(COPYRIGHT_YEAR, _COPYRIGHT_YEAR)
AC_SUBST(BITCOIN_DAEMON_NAME)
AC_SUBST(BITCOIN_CLI_NAME)
AC_SUBST(BITCOIN_TX_NAME)
AC_SUBST(RUST_TARGET)
AC_SUBST(RUST_VENDORED_SOURCES)
AC_SUBST(RELDFLAGS)
AC_SUBST(DEBUG_CPPFLAGS)
AC_SUBST(DEBUG_CXXFLAGS)
AC_SUBST(ERROR_CXXFLAGS)
AC_SUBST(GPROF_CXXFLAGS)
AC_SUBST(GPROF_LDFLAGS)
AC_SUBST(HARDENED_CXXFLAGS)
AC_SUBST(HARDENED_CPPFLAGS)
AC_SUBST(HARDENED_LDFLAGS)
AC_SUBST(PIC_FLAGS)
AC_SUBST(PIE_FLAGS)
AC_SUBST(SANITIZER_CXXFLAGS)
AC_SUBST(SANITIZER_LDFLAGS)
AC_SUBST(SSE42_CXXFLAGS)
AC_SUBST(LIBTOOL_APP_LDFLAGS)
AC_SUBST(BOOST_LIBS)
AC_SUBST(TESTDEFS)
AC_SUBST(LEVELDB_TARGET_FLAGS)
AC_SUBST(EVENT_LIBS)
AC_SUBST(EVENT_PTHREADS_LIBS)
AC_SUBST(ZMQ_LIBS)
AC_SUBST(LIBZCASH_LIBS)
AC_CONFIG_FILES([Makefile src/Makefile doc/man/Makefile src/test/buildenv.py])
AC_CONFIG_FILES([qa/pull-tester/tests_config.ini],[chmod +x qa/pull-tester/tests_config.ini])
AC_CONFIG_LINKS([qa/pull-tester/rpc-tests.py:qa/pull-tester/rpc-tests.py])
dnl boost's m4 checks do something really nasty: they export these vars. As a
dnl result, they leak into secp256k1's configure and crazy things happen.
dnl Until this is fixed upstream and we've synced, we'll just un-export them.
CPPFLAGS_TEMP="$CPPFLAGS"
unset CPPFLAGS
CPPFLAGS="$CPPFLAGS_TEMP"
LDFLAGS_TEMP="$LDFLAGS"
unset LDFLAGS
LDFLAGS="$LDFLAGS_TEMP"
LIBS_TEMP="$LIBS"
unset LIBS
LIBS="$LIBS_TEMP"
PKGCONFIG_PATH_TEMP="$PKG_CONFIG_PATH"
unset PKG_CONFIG_PATH
PKG_CONFIG_PATH="$PKGCONFIG_PATH_TEMP"
PKGCONFIG_LIBDIR_TEMP="$PKG_CONFIG_LIBDIR"
unset PKG_CONFIG_LIBDIR
PKG_CONFIG_LIBDIR="$PKGCONFIG_LIBDIR_TEMP"
ac_configure_args="${ac_configure_args} --disable-shared --with-pic --enable-benchmark=no --with-bignum=no --enable-module-recovery"