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configure.ac
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configure.ac
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AC_PREREQ([2.69])
define(_CLIENT_VERSION_MAJOR, 25)
define(_CLIENT_VERSION_MINOR, 99)
define(_CLIENT_VERSION_BUILD, 0)
define(_CLIENT_VERSION_RC, 0)
define(_CLIENT_VERSION_IS_RELEASE, false)
define(_COPYRIGHT_YEAR, 2023)
define(_COPYRIGHT_HOLDERS,[The %s developers])
define(_COPYRIGHT_HOLDERS_SUBSTITUTION,[[Bitcoin Core]])
AC_INIT([Bitcoin Core],m4_join([.], _CLIENT_VERSION_MAJOR, _CLIENT_VERSION_MINOR, _CLIENT_VERSION_BUILD)m4_if(_CLIENT_VERSION_RC, [0], [], [rc]_CLIENT_VERSION_RC),[https://github.com/bitcoin/bitcoin/issues],[bitcoin],[https://bitcoincore.org/])
AC_CONFIG_SRCDIR([src/validation.cpp])
AC_CONFIG_HEADERS([src/config/bitcoin-config.h])
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_MACRO_DIR([build-aux/m4])
m4_ifndef([PKG_PROG_PKG_CONFIG], [m4_fatal([PKG_PROG_PKG_CONFIG macro not found. Please install pkg-config and re-run autogen.sh])])
PKG_PROG_PKG_CONFIG
if test "$PKG_CONFIG" = ""; then
AC_MSG_ERROR([pkg-config not found])
fi
# When compiling with depends, the `PKG_CONFIG_PATH` and `PKG_CONFIG_LIBDIR` variables,
# being set in a `config.site` file, are not exported to let the `--config-cache` option
# work properly.
if test -n "$PKG_CONFIG_PATH"; then
PKG_CONFIG="env PKG_CONFIG_PATH=$PKG_CONFIG_PATH $PKG_CONFIG"
fi
if test -n "$PKG_CONFIG_LIBDIR"; then
PKG_CONFIG="env PKG_CONFIG_LIBDIR=$PKG_CONFIG_LIBDIR $PKG_CONFIG"
fi
BITCOIN_DAEMON_NAME=bitcoind
BITCOIN_GUI_NAME=bitcoin-qt
BITCOIN_TEST_NAME=test_bitcoin
BITCOIN_CLI_NAME=bitcoin-cli
BITCOIN_TX_NAME=bitcoin-tx
BITCOIN_UTIL_NAME=bitcoin-util
BITCOIN_CHAINSTATE_NAME=bitcoin-chainstate
BITCOIN_WALLET_TOOL_NAME=bitcoin-wallet
dnl Multi Process
BITCOIN_MP_NODE_NAME=bitcoin-node
BITCOIN_MP_GUI_NAME=bitcoin-gui
dnl Unless the user specified ARFLAGS, force it to be cr
dnl This is also the default as-of libtool 2.4.7
AC_ARG_VAR([ARFLAGS], [Flags for the archiver, defaults to <cr> if not set])
if test "${ARFLAGS+set}" != "set"; 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 Automake init set-up and checks
AM_INIT_AUTOMAKE([1.13 no-define subdir-objects foreign])
AM_MAINTAINER_MODE([enable])
dnl make the compilation flags quiet unless V=1 is used
AM_SILENT_RULES([yes])
dnl Compiler checks (here before libtool).
if test "${CXXFLAGS+set}" = "set"; then
CXXFLAGS_overridden=yes
else
CXXFLAGS_overridden=no
fi
AC_PROG_CXX
dnl libtool overrides
case $host in
*mingw*)
dnl By default, libtool for mingw refuses to link static libs into a dll for
dnl fear of mixing pic/non-pic objects, and import/export complications. Since
dnl we have those under control, re-enable that functionality.
lt_cv_deplibs_check_method="pass_all"
dnl Remove unwanted -DDLL_EXPORT from these variables.
dnl We do not use this macro, but system headers may export unwanted symbols
dnl if it's set.
lt_cv_prog_compiler_pic="-DPIC"
lt_cv_prog_compiler_pic_CXX="-DPIC"
;;
*darwin*)
dnl Because it prints a verbose warning, lld fails the following check
dnl for "-Wl,-single_module" from libtool.m4:
dnl # If there is a non-empty error log, and "single_module"
dnl # appears in it, assume the flag caused a linker warning
dnl "-single_module" works fine on ld64 and lld, so just bypass the test.
dnl Failure to set this to "yes" causes libtool to use a very broken
dnl link-line for shared libs.
lt_cv_apple_cc_single_mod="yes"
;;
esac
AC_ARG_ENABLE([c++20],
[AS_HELP_STRING([--enable-c++20],
[enable compilation in c++20 mode (disabled by default)])],
[use_cxx20=$enableval],
[use_cxx20=no])
dnl Require C++17 compiler (no GNU extensions)
if test "$use_cxx20" = "no"; then
AX_CXX_COMPILE_STDCXX([17], [noext], [mandatory])
else
AX_CXX_COMPILE_STDCXX([20], [noext], [mandatory])
fi
dnl Unless the user specified OBJCXX, force it to be the same as CXX. This ensures
dnl that we get the same -std flags for both.
m4_ifdef([AC_PROG_OBJCXX],[
if test "${OBJCXX+set}" = ""; then
OBJCXX="${CXX}"
fi
AC_PROG_OBJCXX
])
dnl OpenBSD ships with 2.4.2
LT_PREREQ([2.4.2])
dnl Libtool init checks.
LT_INIT([pic-only win32-dll])
dnl Check/return PATH for base programs.
AC_PATH_TOOL([AR], [ar])
AC_PATH_TOOL([GCOV], [gcov])
AC_PATH_TOOL([LLVM_COV], [llvm-cov])
AC_PATH_PROG([LCOV], [lcov])
dnl Python 3.8 is specified in .python-version and should be used if available, see doc/dependencies.md
AC_PATH_PROGS([PYTHON], [python3.8 python3.9 python3.10 python3.11 python3.12 python3 python])
AC_PATH_PROG([GENHTML], [genhtml])
AC_PATH_PROG([GIT], [git])
AC_PATH_PROG([CCACHE], [ccache])
AC_PATH_PROG([XGETTEXT], [xgettext])
AC_PATH_PROG([HEXDUMP], [hexdump])
AC_PATH_TOOL([OBJCOPY], [objcopy])
AC_PATH_PROG([DOXYGEN], [doxygen])
AM_CONDITIONAL([HAVE_DOXYGEN], [test -n "$DOXYGEN"])
AC_ARG_VAR([PYTHONPATH], [Augments the default search path for python module files])
AC_ARG_ENABLE([wallet],
[AS_HELP_STRING([--disable-wallet],
[disable wallet (enabled by default)])],
[enable_wallet=$enableval],
[enable_wallet=auto])
AC_ARG_WITH([sqlite],
[AS_HELP_STRING([--with-sqlite=yes|no|auto],
[enable sqlite wallet support (default: auto, i.e., enabled if wallet is enabled and sqlite is found)])],
[use_sqlite=$withval],
[use_sqlite=auto])
AC_ARG_WITH([bdb],
[AS_HELP_STRING([--without-bdb],
[disable bdb wallet support (default is enabled if wallet is enabled)])],
[use_bdb=$withval],
[use_bdb=auto])
AC_ARG_ENABLE([usdt],
[AS_HELP_STRING([--enable-usdt],
[enable tracepoints for Userspace, Statically Defined Tracing (default is yes if sys/sdt.h is found)])],
[use_usdt=$enableval],
[use_usdt=yes])
AC_ARG_WITH([miniupnpc],
[AS_HELP_STRING([--with-miniupnpc],
[enable UPNP (default is yes if libminiupnpc is found)])],
[use_upnp=$withval],
[use_upnp=auto])
AC_ARG_WITH([natpmp],
[AS_HELP_STRING([--with-natpmp],
[enable NAT-PMP (default is yes if libnatpmp is found)])],
[use_natpmp=$withval],
[use_natpmp=auto])
AC_ARG_ENABLE(tests,
AS_HELP_STRING([--disable-tests],[do not compile tests (default is to compile)]),
[use_tests=$enableval],
[use_tests=yes])
AC_ARG_ENABLE(gui-tests,
AS_HELP_STRING([--disable-gui-tests],[do not compile GUI tests (default is to compile if GUI and tests enabled)]),
[use_gui_tests=$enableval],
[use_gui_tests=$use_tests])
AC_ARG_ENABLE(bench,
AS_HELP_STRING([--disable-bench],[do not compile benchmarks (default is to compile)]),
[use_bench=$enableval],
[use_bench=yes])
AC_ARG_ENABLE([extended-functional-tests],
AS_HELP_STRING([--enable-extended-functional-tests],[enable expensive functional tests when using lcov (default no)]),
[use_extended_functional_tests=$enableval],
[use_extended_functional_tests=no])
AC_ARG_ENABLE([fuzz],
AS_HELP_STRING([--enable-fuzz],
[build for fuzzing (default no). enabling this will disable all other targets and override --{enable,disable}-fuzz-binary]),
[enable_fuzz=$enableval],
[enable_fuzz=no])
AC_ARG_ENABLE([fuzz-binary],
AS_HELP_STRING([--enable-fuzz-binary],
[enable building of fuzz binary (default yes).]),
[enable_fuzz_binary=$enableval],
[enable_fuzz_binary=yes])
AC_ARG_WITH([qrencode],
[AS_HELP_STRING([--with-qrencode],
[enable QR code support (default is yes if qt is enabled and libqrencode is found)])],
[use_qr=$withval],
[use_qr=auto])
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=$enableval],
[use_ccache=auto])
dnl Suppress warnings from external headers (e.g. Boost, Qt).
dnl May be useful if warnings from external headers clutter the build output
dnl too much, so that it becomes difficult to spot Bitcoin Core warnings
dnl or if they cause a build failure with --enable-werror.
AC_ARG_ENABLE([suppress-external-warnings],
[AS_HELP_STRING([--disable-suppress-external-warnings],
[Do not suppress warnings from external headers (default is to suppress)])],
[suppress_external_warnings=$enableval],
[suppress_external_warnings=yes])
AC_ARG_ENABLE([lcov],
[AS_HELP_STRING([--enable-lcov],
[enable lcov testing (default is no)])],
[use_lcov=$enableval],
[use_lcov=no])
AC_ARG_ENABLE([lcov-branch-coverage],
[AS_HELP_STRING([--enable-lcov-branch-coverage],
[enable lcov testing branch coverage (default is no)])],
[use_lcov_branch=yes],
[use_lcov_branch=no])
AC_ARG_ENABLE([threadlocal],
[AS_HELP_STRING([--enable-threadlocal],
[enable features that depend on the c++ thread_local keyword (currently just thread names in debug logs). (default is to enable if there is platform support)])],
[use_thread_local=$enableval],
[use_thread_local=auto])
AC_ARG_ENABLE([asm],
[AS_HELP_STRING([--disable-asm],
[disable assembly routines (enabled by default)])],
[use_asm=$enableval],
[use_asm=yes])
if test "$use_asm" = "yes"; then
AC_DEFINE([USE_ASM], [1], [Define this symbol to build in assembly routines])
fi
AC_ARG_ENABLE([zmq],
[AS_HELP_STRING([--disable-zmq],
[disable ZMQ notifications])],
[use_zmq=$enableval],
[use_zmq=yes])
AC_ARG_WITH([libmultiprocess],
[AS_HELP_STRING([--with-libmultiprocess=yes|no|auto],
[Build with libmultiprocess library. (default: auto, i.e. detect with pkg-config)])],
[with_libmultiprocess=$withval],
[with_libmultiprocess=auto])
AC_ARG_WITH([mpgen],
[AS_HELP_STRING([--with-mpgen=yes|no|auto|PREFIX],
[Build with libmultiprocess codegen tool. Useful to specify different libmultiprocess host system library and build system codegen tool prefixes when cross-compiling (default is host system libmultiprocess prefix)])],
[with_mpgen=$withval],
[with_mpgen=auto])
AC_ARG_ENABLE([multiprocess],
[AS_HELP_STRING([--enable-multiprocess],
[build multiprocess bitcoin-node, bitcoin-wallet, and bitcoin-gui executables in addition to monolithic bitcoind and bitcoin-qt executables. Requires libmultiprocess library. Experimental (default is no)])],
[enable_multiprocess=$enableval],
[enable_multiprocess=no])
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 "$enable_man" != "no"])
dnl Enable debug
AC_ARG_ENABLE([debug],
[AS_HELP_STRING([--enable-debug],
[use compiler flags and macros suited for debugging (default is no)])],
[enable_debug=$enableval],
[enable_debug=no])
dnl 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=$withval])
dnl Enable gprof profiling
AC_ARG_ENABLE([gprof],
[AS_HELP_STRING([--enable-gprof],
[use gprof profiling compiler flags (default is no)])],
[enable_gprof=$enableval],
[enable_gprof=no])
dnl Turn warnings into errors
AC_ARG_ENABLE([werror],
[AS_HELP_STRING([--enable-werror],
[Treat compiler warnings as errors (default is no)])],
[enable_werror=$enableval],
[enable_werror=no])
AC_ARG_ENABLE([external-signer],
[AS_HELP_STRING([--enable-external-signer],[compile external signer support (default is auto, requires Boost::Process)])],
[use_external_signer=$enableval],
[use_external_signer=auto])
AC_ARG_ENABLE([lto],
[AS_HELP_STRING([--enable-lto],[build using LTO (default is no)])],
[enable_lto=$enableval],
[enable_lto=no])
AC_LANG_PUSH([C++])
dnl Check for a flag to turn compiler warnings into errors. This is helpful for checks which may
dnl appear to succeed because by default they merely emit warnings when they fail.
dnl
dnl Note that this is not necessarily a check to see if -Werror is supported, but rather to see if
dnl a compile with -Werror can succeed. This is important because the compiler may already be
dnl warning about something unrelated, for example about some path issue. If that is the case,
dnl -Werror cannot be used because all of those warnings would be turned into errors.
AX_CHECK_COMPILE_FLAG([-Werror], [CXXFLAG_WERROR="-Werror"], [CXXFLAG_WERROR=""])
dnl Check for a flag to turn linker warnings into errors. When flags are passed to linkers via the
dnl compiler driver using a -Wl,-foo flag, linker warnings may be swallowed rather than bubbling up.
dnl See note above, the same applies here as well.
dnl
dnl LDFLAG_WERROR Should only be used when testing -Wl,*
case $host in
*darwin*)
AX_CHECK_LINK_FLAG([-Wl,-fatal_warnings], [LDFLAG_WERROR="-Wl,-fatal_warnings"], [LDFLAG_WERROR=""])
;;
*)
AX_CHECK_LINK_FLAG([-Wl,--fatal-warnings], [LDFLAG_WERROR="-Wl,--fatal-warnings"], [LDFLAG_WERROR=""])
;;
esac
if test "$enable_debug" = "yes"; then
dnl If debugging is enabled, and the user hasn't overridden CXXFLAGS, clear
dnl them, to prevent autoconfs "-g -O2" being added. Otherwise we'd end up
dnl with "-O0 -g3 -g -O2".
if test "$CXXFLAGS_overridden" = "no"; then
CXXFLAGS=""
fi
dnl Disable all optimizations
AX_CHECK_COMPILE_FLAG([-O0], [DEBUG_CXXFLAGS="$DEBUG_CXXFLAGS -O0"], [], [$CXXFLAG_WERROR])
dnl Prefer -g3, fall back to -g if that is unavailable.
AX_CHECK_COMPILE_FLAG(
[-g3],
[DEBUG_CXXFLAGS="$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"], [], [$CXXFLAG_WERROR])
AX_CHECK_PREPROC_FLAG([-DDEBUG_LOCKCONTENTION], [DEBUG_CPPFLAGS="$DEBUG_CPPFLAGS -DDEBUG_LOCKCONTENTION"], [], [$CXXFLAG_WERROR])
AX_CHECK_PREPROC_FLAG([-DRPC_DOC_CHECK], [DEBUG_CPPFLAGS="$DEBUG_CPPFLAGS -DRPC_DOC_CHECK"], [], [$CXXFLAG_WERROR])
AX_CHECK_PREPROC_FLAG([-DABORT_ON_FAILED_ASSUME], [DEBUG_CPPFLAGS="$DEBUG_CPPFLAGS -DABORT_ON_FAILED_ASSUME"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-ftrapv], [DEBUG_CXXFLAGS="$DEBUG_CXXFLAGS -ftrapv"], [], [$CXXFLAG_WERROR])
fi
if test "$enable_lto" = "yes"; then
AX_CHECK_COMPILE_FLAG([-flto], [LTO_CXXFLAGS="$LTO_CXXFLAGS -flto"], [AC_MSG_ERROR([compile failed with -flto])], [$CXXFLAG_WERROR])
AX_CHECK_LINK_FLAG([-flto], [LTO_LDFLAGS="$LTO_LDFLAGS -flto"], [AC_MSG_ERROR([link failed with -flto])], [$CXXFLAG_WERROR])
fi
if test "$use_sanitizers" != ""; then
dnl First check if the compiler accepts flags. If an incompatible pair like
dnl -fsanitize=address,thread is used here, this check will fail. This will also
dnl fail if a bad argument is passed, e.g. -fsanitize=undfeined
AX_CHECK_COMPILE_FLAG(
[-fsanitize=$use_sanitizers],
[SANITIZER_CXXFLAGS="-fsanitize=$use_sanitizers"],
[AC_MSG_ERROR([compiler did not accept requested flags])])
dnl Some compilers (e.g. GCC) require additional libraries like libasan,
dnl libtsan, libubsan, etc. Make sure linking still works with the sanitize
dnl flag. This is a separate check so we can give a better error message when
dnl the sanitize flags are supported by the compiler but the actual sanitizer
dnl libs are missing.
AX_CHECK_LINK_FLAG(
[-fsanitize=$use_sanitizers],
[SANITIZER_LDFLAGS="-fsanitize=$use_sanitizers"],
[AC_MSG_ERROR([linker did not accept requested flags, you are missing required libraries])],
[],
[AC_LANG_PROGRAM([[
#include <cstdint>
#include <cstddef>
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { return 0; }
__attribute__((weak)) // allow for libFuzzer linking
]],[[]])])
fi
ERROR_CXXFLAGS=
if test "$enable_werror" = "yes"; then
if test "$CXXFLAG_WERROR" = ""; then
AC_MSG_ERROR([enable-werror set but -Werror is not usable])
fi
ERROR_CXXFLAGS=$CXXFLAG_WERROR
fi
if test "$CXXFLAGS_overridden" = "no"; then
AX_CHECK_COMPILE_FLAG([-Wall], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wall"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wextra], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wextra"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wgnu], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wgnu"], [], [$CXXFLAG_WERROR])
dnl some compilers will ignore -Wformat-security without -Wformat, so just combine the two here.
AX_CHECK_COMPILE_FLAG([-Wformat -Wformat-security], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wformat -Wformat-security"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wvla], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wvla"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wshadow-field], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wshadow-field"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wthread-safety], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wthread-safety"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wloop-analysis], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wloop-analysis"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wredundant-decls], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wredundant-decls"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wunused-member-function], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wunused-member-function"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wdate-time], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wdate-time"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wconditional-uninitialized], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wconditional-uninitialized"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wduplicated-branches], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wduplicated-branches"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wduplicated-cond], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wduplicated-cond"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wlogical-op], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wlogical-op"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Woverloaded-virtual], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Woverloaded-virtual"], [], [$CXXFLAG_WERROR])
dnl -Wsuggest-override is broken with GCC before 9.2
dnl https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78010
AX_CHECK_COMPILE_FLAG([-Wsuggest-override], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wsuggest-override"], [], [$CXXFLAG_WERROR],
[AC_LANG_SOURCE([[struct A { virtual void f(); }; struct B : A { void f() final; };]])])
AX_CHECK_COMPILE_FLAG([-Wunreachable-code-loop-increment], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wunreachable-code-loop-increment"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wimplicit-fallthrough], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wimplicit-fallthrough"], [], [$CXXFLAG_WERROR])
if test "$suppress_external_warnings" != "no" ; then
AX_CHECK_COMPILE_FLAG([-Wdocumentation], [WARN_CXXFLAGS="$WARN_CXXFLAGS -Wdocumentation"], [], [$CXXFLAG_WERROR])
fi
dnl Some compilers (gcc) ignore unknown -Wno-* options, but warn about all
dnl unknown options if any other warning is produced. Test the -Wfoo case, and
dnl set the -Wno-foo case if it works.
AX_CHECK_COMPILE_FLAG([-Wunused-parameter], [NOWARN_CXXFLAGS="$NOWARN_CXXFLAGS -Wno-unused-parameter"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-Wself-assign], [NOWARN_CXXFLAGS="$NOWARN_CXXFLAGS -Wno-self-assign"], [], [$CXXFLAG_WERROR])
if test "$suppress_external_warnings" != "yes" ; then
AX_CHECK_COMPILE_FLAG([-Wdeprecated-copy], [NOWARN_CXXFLAGS="$NOWARN_CXXFLAGS -Wno-deprecated-copy"], [], [$CXXFLAG_WERROR])
fi
fi
dnl Don't allow extended (non-ASCII) symbols in identifiers. This is easier for code review.
AX_CHECK_COMPILE_FLAG([-fno-extended-identifiers], [CORE_CXXFLAGS="$CORE_CXXFLAGS -fno-extended-identifiers"], [], [$CXXFLAG_WERROR])
enable_arm_crc=no
enable_arm_shani=no
enable_sse42=no
enable_sse41=no
enable_avx2=no
enable_x86_shani=no
if test "$use_asm" = "yes"; then
dnl Check for optional instruction set support. Enabling these does _not_ imply that all code will
dnl be compiled with them, rather that specific objects/libs may use them after checking for runtime
dnl compatibility.
dnl x86
AX_CHECK_COMPILE_FLAG([-msse4.2], [SSE42_CXXFLAGS="-msse4.2"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-msse4.1], [SSE41_CXXFLAGS="-msse4.1"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-mavx -mavx2], [AVX2_CXXFLAGS="-mavx -mavx2"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-msse4 -msha], [X86_SHANI_CXXFLAGS="-msse4 -msha"], [], [$CXXFLAG_WERROR])
enable_clmul=
AX_CHECK_COMPILE_FLAG([-mpclmul], [enable_clmul=yes], [], [$CXXFLAG_WERROR], [AC_LANG_PROGRAM([
#include <stdint.h>
#include <x86intrin.h>
], [
__m128i a = _mm_cvtsi64_si128((uint64_t)7);
__m128i b = _mm_clmulepi64_si128(a, a, 37);
__m128i c = _mm_srli_epi64(b, 41);
__m128i d = _mm_xor_si128(b, c);
uint64_t e = _mm_cvtsi128_si64(d);
return e == 0;
])])
if test "$enable_clmul" = "yes"; then
CLMUL_CXXFLAGS="-mpclmul"
AC_DEFINE([HAVE_CLMUL], [1], [Define this symbol if clmul instructions can be used])
fi
TEMP_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$SSE42_CXXFLAGS $CXXFLAGS"
AC_MSG_CHECKING([for SSE4.2 intrinsics])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <stdint.h>
#if defined(_MSC_VER)
#include <intrin.h>
#elif defined(__GNUC__) && defined(__SSE4_2__)
#include <nmmintrin.h>
#endif
]],[[
uint64_t l = 0;
l = _mm_crc32_u8(l, 0);
l = _mm_crc32_u32(l, 0);
l = _mm_crc32_u64(l, 0);
return l;
]])],
[ AC_MSG_RESULT([yes]); enable_sse42=yes],
[ AC_MSG_RESULT([no])]
)
CXXFLAGS="$TEMP_CXXFLAGS"
TEMP_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$SSE41_CXXFLAGS $CXXFLAGS"
AC_MSG_CHECKING([for SSE4.1 intrinsics])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <stdint.h>
#include <immintrin.h>
]],[[
__m128i l = _mm_set1_epi32(0);
return _mm_extract_epi32(l, 3);
]])],
[ AC_MSG_RESULT([yes]); enable_sse41=yes; AC_DEFINE([ENABLE_SSE41], [1], [Define this symbol to build code that uses SSE4.1 intrinsics]) ],
[ AC_MSG_RESULT([no])]
)
CXXFLAGS="$TEMP_CXXFLAGS"
TEMP_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$AVX2_CXXFLAGS $CXXFLAGS"
AC_MSG_CHECKING([for AVX2 intrinsics])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <stdint.h>
#include <immintrin.h>
]],[[
__m256i l = _mm256_set1_epi32(0);
return _mm256_extract_epi32(l, 7);
]])],
[ AC_MSG_RESULT([yes]); enable_avx2=yes; AC_DEFINE([ENABLE_AVX2], [1], [Define this symbol to build code that uses AVX2 intrinsics]) ],
[ AC_MSG_RESULT([no])]
)
CXXFLAGS="$TEMP_CXXFLAGS"
TEMP_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$X86_SHANI_CXXFLAGS $CXXFLAGS"
AC_MSG_CHECKING([for x86 SHA-NI intrinsics])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <stdint.h>
#include <immintrin.h>
]],[[
__m128i i = _mm_set1_epi32(0);
__m128i j = _mm_set1_epi32(1);
__m128i k = _mm_set1_epi32(2);
return _mm_extract_epi32(_mm_sha256rnds2_epu32(i, i, k), 0);
]])],
[ AC_MSG_RESULT([yes]); enable_x86_shani=yes; AC_DEFINE([ENABLE_X86_SHANI], [1], [Define this symbol to build code that uses x86 SHA-NI intrinsics]) ],
[ AC_MSG_RESULT([no])]
)
CXXFLAGS="$TEMP_CXXFLAGS"
# ARM
AX_CHECK_COMPILE_FLAG([-march=armv8-a+crc], [ARM_CRC_CXXFLAGS="-march=armv8-a+crc"], [], [$CXXFLAG_WERROR])
AX_CHECK_COMPILE_FLAG([-march=armv8-a+crypto], [ARM_SHANI_CXXFLAGS="-march=armv8-a+crypto"], [], [$CXXFLAG_WERROR])
TEMP_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$ARM_CRC_CXXFLAGS $CXXFLAGS"
AC_MSG_CHECKING([for ARMv8 CRC32 intrinsics])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <arm_acle.h>
#include <arm_neon.h>
]],[[
#ifdef __aarch64__
__crc32cb(0, 0); __crc32ch(0, 0); __crc32cw(0, 0); __crc32cd(0, 0);
vmull_p64(0, 0);
#else
#error "crc32c library does not support hardware acceleration on 32-bit ARM"
#endif
]])],
[ AC_MSG_RESULT([yes]); enable_arm_crc=yes; ],
[ AC_MSG_RESULT([no])]
)
CXXFLAGS="$TEMP_CXXFLAGS"
TEMP_CXXFLAGS="$CXXFLAGS"
CXXFLAGS="$ARM_SHANI_CXXFLAGS $CXXFLAGS"
AC_MSG_CHECKING([for ARMv8 SHA-NI intrinsics])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <arm_acle.h>
#include <arm_neon.h>
]],[[
uint32x4_t a, b, c;
vsha256h2q_u32(a, b, c);
vsha256hq_u32(a, b, c);
vsha256su0q_u32(a, b);
vsha256su1q_u32(a, b, c);
]])],
[ AC_MSG_RESULT([yes]); enable_arm_shani=yes; AC_DEFINE([ENABLE_ARM_SHANI], [1], [Define this symbol to build code that uses ARMv8 SHA-NI intrinsics]) ],
[ AC_MSG_RESULT([no])]
)
CXXFLAGS="$TEMP_CXXFLAGS"
fi
CORE_CPPFLAGS="$CORE_CPPFLAGS -DHAVE_BUILD_INFO"
AC_ARG_WITH([utils],
[AS_HELP_STRING([--with-utils],
[build bitcoin-cli bitcoin-tx bitcoin-util bitcoin-wallet (default=yes)])],
[build_bitcoin_utils=$withval],
[build_bitcoin_utils=yes])
AC_ARG_ENABLE([util-cli],
[AS_HELP_STRING([--enable-util-cli],
[build bitcoin-cli])],
[build_bitcoin_cli=$enableval],
[build_bitcoin_cli=$build_bitcoin_utils])
AC_ARG_ENABLE([util-tx],
[AS_HELP_STRING([--enable-util-tx],
[build bitcoin-tx])],
[build_bitcoin_tx=$enableval],
[build_bitcoin_tx=$build_bitcoin_utils])
AC_ARG_ENABLE([util-wallet],
[AS_HELP_STRING([--enable-util-wallet],
[build bitcoin-wallet])],
[build_bitcoin_wallet=$enableval],
[build_bitcoin_wallet=$build_bitcoin_utils])
AC_ARG_ENABLE([util-util],
[AS_HELP_STRING([--enable-util-util],
[build bitcoin-util])],
[build_bitcoin_util=$enableval],
[build_bitcoin_util=$build_bitcoin_utils])
AC_ARG_ENABLE([experimental-util-chainstate],
[AS_HELP_STRING([--enable-experimental-util-chainstate],
[build experimental bitcoin-chainstate executable (default=no)])],
[build_bitcoin_chainstate=$enableval],
[build_bitcoin_chainstate=no])
AC_ARG_WITH([libs],
[AS_HELP_STRING([--with-libs],
[build libraries (default=yes)])],
[build_bitcoin_libs=$withval],
[build_bitcoin_libs=yes])
AC_ARG_WITH([experimental-kernel-lib],
[AS_HELP_STRING([--with-experimental-kernel-lib],
[build experimental bitcoinkernel library (default is to build if we're building libraries and the experimental build-chainstate executable)])],
[build_experimental_kernel_lib=$withval],
[build_experimental_kernel_lib=auto])
AC_ARG_WITH([daemon],
[AS_HELP_STRING([--with-daemon],
[build bitcoind daemon (default=yes)])],
[build_bitcoind=$withval],
[build_bitcoind=yes])
case $host in
*mingw*)
TARGET_OS=windows
AC_CHECK_LIB([kernel32], [GetModuleFileNameA], [], [AC_MSG_ERROR([libkernel32 missing])])
AC_CHECK_LIB([user32], [main], [], [AC_MSG_ERROR([libuser32 missing])])
AC_CHECK_LIB([gdi32], [main], [], [AC_MSG_ERROR([libgdi32 missing])])
AC_CHECK_LIB([comdlg32], [main], [], [AC_MSG_ERROR([libcomdlg32 missing])])
AC_CHECK_LIB([winmm], [main], [], [AC_MSG_ERROR([libwinmm missing])])
AC_CHECK_LIB([shell32], [SHGetSpecialFolderPathW], [], [AC_MSG_ERROR([libshell32 missing])])
AC_CHECK_LIB([comctl32], [main], [], [AC_MSG_ERROR([libcomctl32 missing])])
AC_CHECK_LIB([ole32], [CoCreateInstance], [], [AC_MSG_ERROR([libole32 missing])])
AC_CHECK_LIB([oleaut32], [main], [], [AC_MSG_ERROR([liboleaut32 missing])])
AC_CHECK_LIB([uuid], [main], [], [AC_MSG_ERROR([libuuid missing])])
AC_CHECK_LIB([advapi32], [CryptAcquireContextW], [], [AC_MSG_ERROR([libadvapi32 missing])])
AC_CHECK_LIB([ws2_32], [WSAStartup], [], [AC_MSG_ERROR([libws2_32 missing])])
AC_CHECK_LIB([shlwapi], [PathRemoveFileSpecW], [], [AC_MSG_ERROR([libshlwapi missing])])
AC_CHECK_LIB([iphlpapi], [GetAdaptersAddresses], [], [AC_MSG_ERROR([libiphlpapi missing])])
dnl -static is interpreted by libtool, where it has a different meaning.
dnl In libtool-speak, it's -all-static.
AX_CHECK_LINK_FLAG([-static], [LIBTOOL_APP_LDFLAGS="$LIBTOOL_APP_LDFLAGS -all-static"])
AC_PATH_PROG([MAKENSIS], [makensis], [none])
if test "$MAKENSIS" = "none"; then
AC_MSG_WARN([makensis not found. Cannot create installer.])
fi
AC_PATH_TOOL([WINDRES], [windres], [none])
if test "$WINDRES" = "none"; then
AC_MSG_ERROR([windres not found])
fi
CORE_CPPFLAGS="$CORE_CPPFLAGS -DSECP256K1_STATIC"
CORE_CPPFLAGS="$CORE_CPPFLAGS -D_MT -DWIN32 -D_WINDOWS -D_WIN32_WINNT=0x0601 -D_WIN32_IE=0x0501 -DWIN32_LEAN_AND_MEAN"
dnl Prevent the definition of min/max macros.
dnl We always want to use the standard library.
CORE_CPPFLAGS="$CORE_CPPFLAGS -DNOMINMAX"
dnl libtool insists upon adding -nostdlib and a list of objects/libs to link against.
dnl That breaks our ability to build dll's with static libgcc/libstdc++/libssp. Override
dnl its command here, with the predeps/postdeps removed, and -static inserted. Postdeps are
dnl also overridden to prevent their insertion later.
dnl This should only affect dll's.
archive_cmds_CXX="\$CC -shared \$libobjs \$deplibs \$compiler_flags -static -o \$output_objdir/\$soname \${wl}--enable-auto-image-base -Xlinker --out-implib -Xlinker \$lib"
postdeps_CXX=
dnl We require Windows 7 (NT 6.1) or later
AX_CHECK_LINK_FLAG([-Wl,--major-subsystem-version -Wl,6 -Wl,--minor-subsystem-version -Wl,1], [CORE_LDFLAGS="$CORE_LDFLAGS -Wl,--major-subsystem-version -Wl,6 -Wl,--minor-subsystem-version -Wl,1"], [], [$LDFLAG_WERROR])
;;
*darwin*)
TARGET_OS=darwin
if test $cross_compiling != "yes"; then
BUILD_OS=darwin
AC_CHECK_PROG([BREW], [brew], [brew])
if test "$BREW" = "brew"; 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 or --without-gui for example).
dnl Homebrew may create symlinks in /usr/local/include for some packages.
dnl Because MacOS's clang internally adds "-I /usr/local/include" to its search
dnl paths, this will negate efforts to use -isystem for those packages, as they
dnl will be found first in /usr/local. Use the internal "-internal-isystem"
dnl option to system-ify all /usr/local/include paths without adding it to the list
dnl of search paths in case it's not already there.
if test "$suppress_external_warnings" != "no"; then
AX_CHECK_PREPROC_FLAG([-Xclang -internal-isystem -Xclang /usr/local/include/], [CORE_CPPFLAGS="$CORE_CPPFLAGS -Xclang -internal-isystem -Xclang /usr/local/include/"], [], [$CXXFLAG_WERROR])
fi
if test "$use_bdb" != "no" && $BREW list --versions berkeley-db@4 >/dev/null && test "$BDB_CFLAGS" = "" && test "$BDB_LIBS" = ""; then
bdb_prefix=$($BREW --prefix berkeley-db@4 2>/dev/null)
dnl This must precede the call to BITCOIN_FIND_BDB48 below.
BDB_CFLAGS="-I$bdb_prefix/include"
BDB_LIBS="-L$bdb_prefix/lib -ldb_cxx-4.8"
fi
if $BREW list --versions qt@5 >/dev/null; then
export PKG_CONFIG_PATH="$($BREW --prefix qt@5 2>/dev/null)/lib/pkgconfig:$PKG_CONFIG_PATH"
fi
case $host in
*aarch64*)
dnl The preferred Homebrew prefix for Apple Silicon is /opt/homebrew.
dnl Therefore, as we do not use pkg-config to detect miniupnpc and libnatpmp
dnl packages, we should set the CPPFLAGS and LDFLAGS variables for them
dnl explicitly.
if test "$use_upnp" != "no" && $BREW list --versions miniupnpc >/dev/null; then
miniupnpc_prefix=$($BREW --prefix miniupnpc 2>/dev/null)
if test "$suppress_external_warnings" != "no"; then
MINIUPNPC_CPPFLAGS="-isystem $miniupnpc_prefix/include"
else
MINIUPNPC_CPPFLAGS="-I$miniupnpc_prefix/include"
fi
MINIUPNPC_LIBS="-L$miniupnpc_prefix/lib"
fi
if test "$use_natpmp" != "no" && $BREW list --versions libnatpmp >/dev/null; then
libnatpmp_prefix=$($BREW --prefix libnatpmp 2>/dev/null)
if test "$suppress_external_warnings" != "no"; then
NATPMP_CPPFLAGS="-isystem $libnatpmp_prefix/include"
else
NATPMP_CPPFLAGS="-I$libnatpmp_prefix/include"
fi
NATPMP_LIBS="-L$libnatpmp_prefix/lib"
fi
;;
esac
fi
else
case $build_os in
*darwin*)
BUILD_OS=darwin
;;
*)
AC_PATH_TOOL([DSYMUTIL], [dsymutil], [dsymutil])
AC_PATH_TOOL([INSTALL_NAME_TOOL], [install_name_tool], [install_name_tool])
AC_PATH_TOOL([OTOOL], [otool], [otool])
AC_PATH_PROGS([XORRISOFS], [xorrisofs], [xorrisofs])
dnl libtool will try to strip the static lib, which is a problem for
dnl cross-builds because strip attempts to call a hard-coded ld,
dnl which may not exist in the path. Stripping the .a is not
dnl necessary, so just disable it.
old_striplib=
;;
esac
fi
AX_CHECK_LINK_FLAG([-Wl,-headerpad_max_install_names], [CORE_LDFLAGS="$CORE_LDFLAGS -Wl,-headerpad_max_install_names"], [], [$LDFLAG_WERROR])
CORE_CPPFLAGS="$CORE_CPPFLAGS -DMAC_OSX -DOBJC_OLD_DISPATCH_PROTOTYPES=0"
OBJCXXFLAGS="$CXXFLAGS"
;;
*android*)
dnl make sure android stays above linux for hosts like *linux-android*
TARGET_OS=android
case $host in
*x86_64*)
ANDROID_ARCH=x86_64
NDK_LIBCXX_DIR=x86_64-linux-android
;;
*aarch64*)
ANDROID_ARCH=arm64-v8a
NDK_LIBCXX_DIR=aarch64-linux-android
;;
*armv7a*)
ANDROID_ARCH=armeabi-v7a
NDK_LIBCXX_DIR=arm-linux-androideabi
;;
*) AC_MSG_ERROR([Could not determine Android arch, or it is unsupported]) ;;
esac
;;
*linux*)
TARGET_OS=linux
;;
esac
if test "$use_extended_functional_tests" != "no"; then
AC_SUBST(EXTENDED_FUNCTIONAL_TESTS, --extended)
fi
if test "$use_lcov" = "yes"; then
if test "$LCOV" = ""; then
AC_MSG_ERROR([lcov testing requested but lcov not found])
fi
if test "$PYTHON" = ""; then
AC_MSG_ERROR([lcov testing requested but python not found])
fi
if test "$GENHTML" = ""; then
AC_MSG_ERROR([lcov testing requested but genhtml not found])
fi
AC_MSG_CHECKING([whether compiler is Clang])
AC_PREPROC_IFELSE([AC_LANG_SOURCE([[
#if defined(__clang__) && defined(__llvm__)
// Compiler is Clang
#else
# error Compiler is not Clang
#endif
]])],[
AC_MSG_RESULT([yes])
if test "$LLVM_COV" = ""; then
AC_MSG_ERROR([lcov testing requested but llvm-cov not found])
fi
COV_TOOL="$LLVM_COV gcov"
],[
AC_MSG_RESULT([no])
if test "$GCOV" = "x"; then
AC_MSG_ERROR([lcov testing requested but gcov not found])
fi
COV_TOOL="$GCOV"
])
AC_SUBST(COV_TOOL)
AC_SUBST(COV_TOOL_WRAPPER, "cov_tool_wrapper.sh")
LCOV="$LCOV --gcov-tool $(pwd)/$COV_TOOL_WRAPPER"
AX_CHECK_LINK_FLAG([--coverage], [CORE_LDFLAGS="$CORE_LDFLAGS --coverage"],
[AC_MSG_ERROR([lcov testing requested but --coverage linker flag does not work])])
AX_CHECK_COMPILE_FLAG([--coverage],[CORE_CXXFLAGS="$CORE_CXXFLAGS --coverage"],
[AC_MSG_ERROR([lcov testing requested but --coverage flag does not work])])
dnl If coverage is enabled, and the user hasn't overridden CXXFLAGS, clear
dnl them, to prevent autoconfs "-g -O2" being added. Otherwise we'd end up
dnl with "--coverage -Og -O0 -g -O2".
if test "$CXXFLAGS_overridden" = "no"; then
CXXFLAGS=""
fi
CORE_CXXFLAGS="$CORE_CXXFLAGS -Og -O0"
fi
if test "$use_lcov_branch" != "no"; then
AC_SUBST(LCOV_OPTS, "$LCOV_OPTS --rc lcov_branch_coverage=1")
fi
dnl Check for endianness
AC_C_BIGENDIAN
dnl Check for pthread compile/link requirements
AX_PTHREAD
dnl Check if -latomic is required for <std::atomic>
CHECK_ATOMIC
dnl The following macro will add the necessary defines to bitcoin-config.h, but
dnl they also need to be passed down to any subprojects. Pull the results out of
dnl the cache and add them to CPPFLAGS.
AC_SYS_LARGEFILE
dnl detect POSIX or GNU variant of strerror_r
AC_FUNC_STRERROR_R
if test "$ac_cv_sys_file_offset_bits" != "" &&
test "$ac_cv_sys_file_offset_bits" != "no" &&
test "$ac_cv_sys_file_offset_bits" != "unknown"; then
CORE_CPPFLAGS="$CORE_CPPFLAGS -D_FILE_OFFSET_BITS=$ac_cv_sys_file_offset_bits"
fi
if test "$ac_cv_sys_large_files" != "" &&
test "$ac_cv_sys_large_files" != "no" &&
test "$ac_cv_sys_large_files" != "unknown"; then
CORE_CPPFLAGS="$CORE_CPPFLAGS -D_LARGE_FILES=$ac_cv_sys_large_files"
fi
if test "$enable_gprof" = "yes"; then
dnl -pg is incompatible with -pie. Since hardening and profiling together doesn't make sense,
dnl we simply make them mutually exclusive here. Additionally, hardened toolchains may force
dnl -pie by default, in which case it needs to be turned off with -no-pie.
if test "$use_hardening" = "yes"; 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])], [$GPROF_LDFLAGS])
fi
if test "$TARGET_OS" != "windows"; then
dnl All windows code is PIC, forcing it on just adds useless compile warnings
AX_CHECK_COMPILE_FLAG([-fPIC], [PIC_FLAGS="-fPIC"])
fi
dnl Versions of gcc prior to 12.1 (commit
dnl https://github.com/gcc-mirror/gcc/commit/551aa75778a4c5165d9533cd447c8fc822f583e1)
dnl are subject to a bug, see the gccbug_90348 test case and
dnl https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90348. To work around that, set
dnl -fstack-reuse=none for all gcc builds. (Only gcc understands this flag)
AX_CHECK_COMPILE_FLAG([-fstack-reuse=none], [HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fstack-reuse=none"])
if test "$use_hardening" != "no"; then
use_hardening=yes
AX_CHECK_COMPILE_FLAG([-Wstack-protector], [HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -Wstack-protector"])
AX_CHECK_COMPILE_FLAG([-fstack-protector-all], [HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fstack-protector-all"])
AX_CHECK_COMPILE_FLAG([-fcf-protection=full], [HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fcf-protection=full"])
case $host in
*mingw*)
dnl stack-clash-protection doesn't compile with GCC 10 and earlier.
dnl In any case, it is a no-op for Windows.
dnl See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90458 for more details.
;;
*)
AX_CHECK_COMPILE_FLAG([-fstack-clash-protection], [HARDENED_CXXFLAGS="$HARDENED_CXXFLAGS -fstack-clash-protection"], [], [$CXXFLAG_WERROR])
;;
esac
dnl When enable_debug is yes, all optimizations are disabled.
dnl However, FORTIFY_SOURCE requires that there is some level of optimization, otherwise it does nothing and just creates a compiler warning.
dnl Since FORTIFY_SOURCE is a no-op without optimizations, do not enable it when enable_debug is yes.
if test "$enable_debug" != "yes"; then
AX_CHECK_PREPROC_FLAG([-D_FORTIFY_SOURCE=3],[
AX_CHECK_PREPROC_FLAG([-U_FORTIFY_SOURCE],[
HARDENED_CPPFLAGS="$HARDENED_CPPFLAGS -U_FORTIFY_SOURCE"
])
HARDENED_CPPFLAGS="$HARDENED_CPPFLAGS -D_FORTIFY_SOURCE=3"
])
fi
AX_CHECK_LINK_FLAG([-Wl,--enable-reloc-section], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,--enable-reloc-section"], [], [$LDFLAG_WERROR])
AX_CHECK_LINK_FLAG([-Wl,--dynamicbase], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,--dynamicbase"], [], [$LDFLAG_WERROR])
AX_CHECK_LINK_FLAG([-Wl,--nxcompat], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,--nxcompat"], [], [$LDFLAG_WERROR])
AX_CHECK_LINK_FLAG([-Wl,--high-entropy-va], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,--high-entropy-va"], [], [$LDFLAG_WERROR])
AX_CHECK_LINK_FLAG([-Wl,-z,relro], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,relro"], [], [$LDFLAG_WERROR])
AX_CHECK_LINK_FLAG([-Wl,-z,now], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,now"], [], [$LDFLAG_WERROR])
AX_CHECK_LINK_FLAG([-Wl,-z,separate-code], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,separate-code"], [], [$LDFLAG_WERROR])
AX_CHECK_LINK_FLAG([-fPIE -pie], [PIE_FLAGS="-fPIE"; HARDENED_LDFLAGS="$HARDENED_LDFLAGS -pie"], [], [$CXXFLAG_WERROR])
case $host in
*mingw*)
AC_CHECK_LIB([ssp], [main], [], [AC_MSG_ERROR([libssp missing])])
;;
esac
fi
dnl These flags are specific to ld64, and may cause issues with other linkers.
dnl For example: GNU ld will interpret -dead_strip as -de and then try and use
dnl "ad_strip" as the symbol for the entry point.
if test "$TARGET_OS" = "darwin"; then
AX_CHECK_LINK_FLAG([-Wl,-dead_strip], [CORE_LDFLAGS="$CORE_LDFLAGS -Wl,-dead_strip"], [], [$LDFLAG_WERROR])