diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 101 |
1 files changed, 79 insertions, 22 deletions
diff --git a/configure.ac b/configure.ac index 90d6ca6282..87dde42dbb 100644 --- a/configure.ac +++ b/configure.ac @@ -61,8 +61,20 @@ case $host in lt_cv_deplibs_check_method="pass_all" ;; esac -dnl Require C++11 compiler (no GNU extensions) -AX_CXX_COMPILE_STDCXX([11], [noext], [mandatory], [nodefault]) + +AC_ARG_ENABLE([c++17], + [AS_HELP_STRING([--enable-c++17], + [enable compilation in c++17 mode (disabled by default)])], + [use_cxx17=$enableval], + [use_cxx17=no]) + +dnl Require C++11 or C++17 compiler (no GNU extensions) +if test "x$use_cxx17" = xyes; then + AX_CXX_COMPILE_STDCXX([17], [noext], [mandatory]) +else + AX_CXX_COMPILE_STDCXX([11], [noext], [mandatory]) +fi + dnl Check if -latomic is required for <std::atomic> CHECK_ATOMIC @@ -271,8 +283,30 @@ AC_ARG_ENABLE([werror], [enable_werror=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 $host in + *darwin*) + AX_CHECK_LINK_FLAG([-Wl,-fatal_warnings],[LDFLAG_WERROR="-Wl,-fatal_warnings"],[LDFLAG_WERROR=""]) + ;; + *) + AX_CHECK_LINK_FLAG([-Wl,--fatal-warnings],[LDFLAG_WERROR="-Wl,--fatal-warnings"],[LDFLAG_WERROR=""]) + ;; +esac + if test "x$enable_debug" = xyes; then dnl Clear default -g -O2 flags if test "x$CXXFLAGS_overridden" = xno; then @@ -332,11 +366,18 @@ if test "x$enable_werror" = "xyes"; then AX_CHECK_COMPILE_FLAG([-Werror=unused-variable],[ERROR_CXXFLAGS="$ERROR_CXXFLAGS -Werror=unused-variable"],,[[$CXXFLAG_WERROR]]) AX_CHECK_COMPILE_FLAG([-Werror=date-time],[ERROR_CXXFLAGS="$ERROR_CXXFLAGS -Werror=date-time"],,[[$CXXFLAG_WERROR]]) AX_CHECK_COMPILE_FLAG([-Werror=return-type],[ERROR_CXXFLAGS="$ERROR_CXXFLAGS -Werror=return-type"],,[[$CXXFLAG_WERROR]]) + AX_CHECK_COMPILE_FLAG([-Werror=conditional-uninitialized],[ERROR_CXXFLAGS="$ERROR_CXXFLAGS -Werror=conditional-uninitialized"],,[[$CXXFLAG_WERROR]]) + AX_CHECK_COMPILE_FLAG([-Werror=sign-compare],[ERROR_CXXFLAGS="$ERROR_CXXFLAGS -Werror=sign-compare"],,[[$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([-Werror=suggest-override],[ERROR_CXXFLAGS="$ERROR_CXXFLAGS -Werror=suggest-override"],,[[$CXXFLAG_WERROR]], + [AC_LANG_SOURCE([[struct A { virtual void f(); }; struct B : A { void f() final; };]])]) fi if test "x$CXXFLAGS_overridden" = "xno"; then AX_CHECK_COMPILE_FLAG([-Wall],[WARN_CXXFLAGS="$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"],,[[$CXXFLAG_WERROR]]) AX_CHECK_COMPILE_FLAG([-Wformat],[WARN_CXXFLAGS="$WARN_CXXFLAGS -Wformat"],,[[$CXXFLAG_WERROR]]) AX_CHECK_COMPILE_FLAG([-Wvla],[WARN_CXXFLAGS="$WARN_CXXFLAGS -Wvla"],,[[$CXXFLAG_WERROR]]) AX_CHECK_COMPILE_FLAG([-Wswitch],[WARN_CXXFLAGS="$WARN_CXXFLAGS -Wswitch"],,[[$CXXFLAG_WERROR]]) @@ -346,6 +387,10 @@ if test "x$CXXFLAGS_overridden" = "xno"; then AX_CHECK_COMPILE_FLAG([-Wredundant-decls],[WARN_CXXFLAGS="$WARN_CXXFLAGS -Wredundant-decls"],,[[$CXXFLAG_WERROR]]) AX_CHECK_COMPILE_FLAG([-Wunused-variable],[WARN_CXXFLAGS="$WARN_CXXFLAGS -Wunused-variable"],,[[$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([-Wsign-compare],[WARN_CXXFLAGS="$WARN_CXXFLAGS -Wsign-compare"],,[[$CXXFLAG_WERROR]]) + 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; };]])]) 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 @@ -540,9 +585,6 @@ case $host in fi CPPFLAGS="$CPPFLAGS -D_MT -DWIN32 -D_WINDOWS -DBOOST_THREAD_USE_LIB -D_WIN32_WINNT=0x0601" - if test "x$CXXFLAGS_overridden" = "xno"; then - CXXFLAGS="$CXXFLAGS -w" - fi 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 @@ -599,7 +641,7 @@ case $host in esac fi - AX_CHECK_LINK_FLAG([[-Wl,-headerpad_max_install_names]], [LDFLAGS="$LDFLAGS -Wl,-headerpad_max_install_names"]) + AX_CHECK_LINK_FLAG([[-Wl,-headerpad_max_install_names]], [LDFLAGS="$LDFLAGS -Wl,-headerpad_max_install_names"],, [[$LDFLAG_WERROR]]) CPPFLAGS="$CPPFLAGS -DMAC_OSX -DOBJC_OLD_DISPATCH_PROTOTYPES=0" OBJCXXFLAGS="$CXXFLAGS" ;; @@ -695,8 +737,8 @@ if test x$use_glibc_compat != xno; then [ fdelt_type="long int"]) AC_MSG_RESULT($fdelt_type) AC_DEFINE_UNQUOTED(FDELT_TYPE, $fdelt_type,[parameter and return value type for __fdelt_chk]) - AX_CHECK_LINK_FLAG([[-Wl,--wrap=__divmoddi4]], [COMPAT_LDFLAGS="$COMPAT_LDFLAGS -Wl,--wrap=__divmoddi4"]) - AX_CHECK_LINK_FLAG([[-Wl,--wrap=log2f]], [COMPAT_LDFLAGS="$COMPAT_LDFLAGS -Wl,--wrap=log2f"]) + AX_CHECK_LINK_FLAG([[-Wl,--wrap=__divmoddi4]], [COMPAT_LDFLAGS="$COMPAT_LDFLAGS -Wl,--wrap=__divmoddi4"],, [[$LDFLAG_WERROR]]) + AX_CHECK_LINK_FLAG([[-Wl,--wrap=log2f]], [COMPAT_LDFLAGS="$COMPAT_LDFLAGS -Wl,--wrap=log2f"],, [[$LDFLAG_WERROR]]) else AC_SEARCH_LIBS([clock_gettime],[rt]) fi @@ -744,11 +786,11 @@ if test x$use_hardening != xno; then ]) fi - AX_CHECK_LINK_FLAG([[-Wl,--dynamicbase]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,--dynamicbase"]) - AX_CHECK_LINK_FLAG([[-Wl,--nxcompat]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,--nxcompat"]) - AX_CHECK_LINK_FLAG([[-Wl,--high-entropy-va]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,--high-entropy-va"]) - AX_CHECK_LINK_FLAG([[-Wl,-z,relro]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,relro"]) - AX_CHECK_LINK_FLAG([[-Wl,-z,now]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-z,now"]) + AX_CHECK_LINK_FLAG([[-Wl,--dynamicbase]], [HARDENED_LDFLAGS="$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"],, [[$LDFLAG_WERROR]]) AX_CHECK_LINK_FLAG([[-fPIE -pie]], [PIE_FLAGS="-fPIE"; HARDENED_LDFLAGS="$HARDENED_LDFLAGS -pie"],, [[$CXXFLAG_WERROR]]) case $host in @@ -758,16 +800,18 @@ if test x$use_hardening != xno; then esac fi -dnl this flag screws up non-darwin gcc even when the check fails. special-case it. +dnl These flags are specific to ld64, and may cause issues with other linkers. +dnl For example: GNU ld will intepret -dead_strip as -de and then try and use +dnl "ad_strip" as the symbol for the entry point. if test x$TARGET_OS = xdarwin; then - AX_CHECK_LINK_FLAG([[-Wl,-dead_strip]], [LDFLAGS="$LDFLAGS -Wl,-dead_strip"]) - AX_CHECK_LINK_FLAG([[-Wl,-dead_strip_dylibs]], [LDFLAGS="$LDFLAGS -Wl,-dead_strip_dylibs"]) - AX_CHECK_LINK_FLAG([[-Wl,-bind_at_load]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-bind_at_load"]) + AX_CHECK_LINK_FLAG([[-Wl,-dead_strip]], [LDFLAGS="$LDFLAGS -Wl,-dead_strip"],, [[$LDFLAG_WERROR]]) + AX_CHECK_LINK_FLAG([[-Wl,-dead_strip_dylibs]], [LDFLAGS="$LDFLAGS -Wl,-dead_strip_dylibs"],, [[$LDFLAG_WERROR]]) + AX_CHECK_LINK_FLAG([[-Wl,-bind_at_load]], [HARDENED_LDFLAGS="$HARDENED_LDFLAGS -Wl,-bind_at_load"],, [[$LDFLAG_WERROR]]) fi if test x$enable_determinism = xyes; then if test x$TARGET_OS = xwindows; then - AX_CHECK_LINK_FLAG([[-Wl,--no-insert-timestamp]], [LDFLAGS="$LDFLAGS -Wl,--no-insert-timestamp"]) + AX_CHECK_LINK_FLAG([[-Wl,--no-insert-timestamp]], [LDFLAGS="$LDFLAGS -Wl,--no-insert-timestamp"],, [[$LDFLAG_WERROR]]) fi fi @@ -845,6 +889,22 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <malloc.h>]], [ AC_MSG_RESULT(no)] ) +dnl Check for posix_fallocate +AC_MSG_CHECKING(for posix_fallocate) +AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ + // same as in src/util/system.cpp + #ifdef __linux__ + #ifdef _POSIX_C_SOURCE + #undef _POSIX_C_SOURCE + #endif + #define _POSIX_C_SOURCE 200112L + #endif // __linux__ + #include <fcntl.h>]], + [[ int f = posix_fallocate(0, 0, 0); ]])], + [ AC_MSG_RESULT(yes); AC_DEFINE(HAVE_POSIX_FALLOCATE, 1,[Define this symbol if you have posix_fallocate]) ], + [ AC_MSG_RESULT(no)] +) + AC_MSG_CHECKING([for visibility attribute]) AC_LINK_IFELSE([AC_LANG_SOURCE([ int foo_def( void ) __attribute__((visibility("default"))); @@ -1183,7 +1243,7 @@ fi if test x$use_reduce_exports = xyes; then CXXFLAGS="$CXXFLAGS $RE_CXXFLAGS" - AX_CHECK_LINK_FLAG([[-Wl,--exclude-libs,ALL]], [RELDFLAGS="-Wl,--exclude-libs,ALL"]) + AX_CHECK_LINK_FLAG([[-Wl,--exclude-libs,ALL]], [RELDFLAGS="-Wl,--exclude-libs,ALL"],, [[$LDFLAG_WERROR]]) fi if test x$use_tests = xyes; then @@ -1414,9 +1474,6 @@ if test "x$use_ccache" != "xno"; then 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]) |