dnl nghttp2 - HTTP/2 C Library dnl Copyright (c) 2012, 2013, 2014, 2015 Tatsuhiro Tsujikawa dnl Permission is hereby granted, free of charge, to any person obtaining dnl a copy of this software and associated documentation files (the dnl "Software"), to deal in the Software without restriction, including dnl without limitation the rights to use, copy, modify, merge, publish, dnl distribute, sublicense, and/or sell copies of the Software, and to dnl permit persons to whom the Software is furnished to do so, subject to dnl the following conditions: dnl The above copyright notice and this permission notice shall be dnl included in all copies or substantial portions of the Software. dnl THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, dnl EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF dnl MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND dnl NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE dnl LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION dnl OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION dnl WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. dnl Do not change user variables! dnl http://www.gnu.org/software/automake/manual/html_node/Flag-Variables-Ordering.html AC_PREREQ(2.61) AC_INIT([nghttp2], [1.3.3-DEV], [t-tujikawa@users.sourceforge.net]) AC_CONFIG_AUX_DIR([.]) AC_CONFIG_MACRO_DIR([m4]) AC_CONFIG_HEADERS([config.h]) AC_USE_SYSTEM_EXTENSIONS LT_PREREQ([2.2.6]) LT_INIT() AC_CANONICAL_BUILD AC_CANONICAL_HOST AC_CANONICAL_TARGET AM_INIT_AUTOMAKE([subdir-objects]) # AM_EXTRA_RECURSIVE_TARGETS requires automake 1.13 or higher m4_ifdef([AM_EXTRA_RECURSIVE_TARGETS], [AM_EXTRA_RECURSIVE_TARGETS([it itprep])]) m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])]) dnl See versioning rule: dnl http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html AC_SUBST(LT_CURRENT, 15) AC_SUBST(LT_REVISION, 2) AC_SUBST(LT_AGE, 1) major=`echo $PACKAGE_VERSION |cut -d. -f1 | sed -e "s/[^0-9]//g"` minor=`echo $PACKAGE_VERSION |cut -d. -f2 | sed -e "s/[^0-9]//g"` patch=`echo $PACKAGE_VERSION |cut -d. -f3 | cut -d- -f1 | sed -e "s/[^0-9]//g"` PACKAGE_VERSION_NUM=`printf "0x%02x%02x%02x" "$major" "$minor" "$patch"` AC_SUBST(PACKAGE_VERSION_NUM) dnl Checks for command-line options AC_ARG_ENABLE([werror], [AS_HELP_STRING([--enable-werror], [Turn on compile time warnings])], [werror=$enableval], [werror=no]) AC_ARG_ENABLE([debug], [AS_HELP_STRING([--enable-debug], [Turn on debug output])], [debug=$enableval], [debug=no]) AC_ARG_ENABLE([threads], [AS_HELP_STRING([--disable-threads], [Turn off threading in apps])], [threads=$enableval], [threads=yes]) AC_ARG_ENABLE([app], [AS_HELP_STRING([--enable-app], [Build applications (nghttp, nghttpd and nghttpx) [default=check]])], [request_app=$enableval], [request_app=check]) AC_ARG_ENABLE([hpack-tools], [AS_HELP_STRING([--enable-hpack-tools], [Build HPACK tools [default=check]])], [request_hpack_tools=$enableval], [request_hpack_tools=check]) AC_ARG_ENABLE([asio-lib], [AS_HELP_STRING([--enable-asio-lib], [Build C++ libnghttp2_asio library [default=no]])], [request_asio_lib=$enableval], [request_asio_lib=no]) AC_ARG_ENABLE([examples], [AS_HELP_STRING([--enable-examples], [Build examples [default=check]])], [request_examples=$enableval], [request_examples=check]) AC_ARG_ENABLE([python-bindings], [AS_HELP_STRING([--enable-python-bindings], [Build Python bindings [default=check]])], [request_python_bindings=$enableval], [request_python_bindings=check]) AC_ARG_ENABLE([failmalloc], [AS_HELP_STRING([--disable-failmalloc], [Do not build failmalloc test program])], [request_failmalloc=$enableval], [request_failmalloc=yes]) AC_ARG_WITH([libxml2], [AS_HELP_STRING([--with-libxml2], [Use libxml2 [default=check]])], [request_libxml2=$withval], [request_libxml2=check]) AC_ARG_WITH([jemalloc], [AS_HELP_STRING([--with-jemalloc], [Use jemalloc [default=check]])], [request_jemalloc=$withval], [request_jemalloc=check]) AC_ARG_WITH([spdylay], [AS_HELP_STRING([--with-spdylay], [Use spdylay [default=check]])], [request_spdylay=$withval], [request_spdylay=check]) AC_ARG_WITH([mruby], [AS_HELP_STRING([--with-mruby], [Use mruby [default=no]])], [request_mruby=$withval], [request_mruby=no]) AC_ARG_WITH([cython], [AS_HELP_STRING([--with-cython=PATH], [Use cython in given PATH])], [cython_path=$withval], []) dnl Define variables AC_ARG_VAR([CYTHON], [the Cython executable]) dnl Checks for programs AC_PROG_CC AC_PROG_CXX AC_PROG_CPP AC_PROG_INSTALL AC_PROG_LN_S AC_PROG_MAKE_SET AC_PROG_MKDIR_P PKG_PROG_PKG_CONFIG([0.20]) AM_PATH_PYTHON([2.7],, [:]) if [test "x$request_python_bindings" != "xno"]; then AX_PYTHON_DEVEL([>= '2.7']) fi if test "x${cython_path}" = "x"; then AC_CHECK_PROGS([CYTHON], [cython.py cython]) else CYTHON=${cython_path} AC_SUBST([CYTHON]) fi # # If we're running GCC or clang define _U_ to be "__attribute__((unused))" # so we can use _U_ to flag unused function parameters and not get warnings # about them. Otherwise, define _U_ to be an empty string so that _U_ used # to flag an unused function parameters will compile with other compilers. # # XXX - similar hints for other compilers? # if test "x$GCC" = "xyes" -o "x$CC" = "xclang" ; then AC_DEFINE([_U_], [__attribute__((unused))], [Hint to the compiler that a function parameters is not used]) AC_DEFINE([NGHTTP2_NORETURN], [__attribute__((noreturn))], [Hint to the compiler that a function never return]) else AC_DEFINE([_U_], , [Hint to the compiler that a function parameters is not use AC_DEFINE([NGHTTP2_NORETURN], , [Hint to the compiler that a function never return]) d]) fi AX_CXX_COMPILE_STDCXX_11([noext], [optional]) AC_LANG_PUSH(C++) # Check that std::future is available. AC_MSG_CHECKING([whether std::future is available]) AC_COMPILE_IFELSE([AC_LANG_PROGRAM( [[ #include #include ]], [[ std::vector> v; ]])], [AC_DEFINE([HAVE_STD_FUTURE], [1], [Define to 1 if you have the `std::future`.]) have_std_future=yes AC_MSG_RESULT([yes])], [have_std_future=no AC_MSG_RESULT([no])]) # Check that std::map::emplace is available for g++-4.7. AC_MSG_CHECKING([whether std::map::emplace is available]) AC_COMPILE_IFELSE([AC_LANG_PROGRAM( [[ #include ]], [[ std::map().emplace(1, 2); ]])], [AC_DEFINE([HAVE_STD_MAP_EMPLACE], [1], [Define to 1 if you have the `std::map::emplace`.]) have_std_map_emplace=yes AC_MSG_RESULT([yes])], [have_std_map_emplace=no AC_MSG_RESULT([no])]) AC_LANG_POP() # Checks for libraries. # Additional libraries required for tests. TESTLDADD= # Additional libraries required for programs under src directory. APPLDFLAGS= case "$host" in *android*) android_build=yes # android does not need -pthread, but needs followng 3 libs for C++ APPLDFLAGS="$APPLDFLAGS -lstdc++ -latomic -lsupc++" ;; *) PTHREAD_LDFLAGS="-pthread" APPLDFLAGS="$APPLDFLAGS $PTHREAD_LDFLAGS" ;; esac # zlib PKG_CHECK_MODULES([ZLIB], [zlib >= 1.2.3], [have_zlib=yes], [have_zlib=no]) if test "x${have_zlib}" = "xno"; then AC_MSG_NOTICE($ZLIB_PKG_ERRORS) fi # cunit PKG_CHECK_MODULES([CUNIT], [cunit >= 2.1], [have_cunit=yes], [have_cunit=no]) # If pkg-config does not find cunit, check it using AC_CHECK_LIB. We # do this because Debian (Ubuntu) lacks pkg-config file for cunit. if test "x${have_cunit}" = "xno"; then AC_MSG_WARN([${CUNIT_PKG_ERRORS}]) AC_CHECK_LIB([cunit], [CU_initialize_registry], [have_cunit=yes], [have_cunit=no]) if test "x${have_cunit}" = "xyes"; then CUNIT_LIBS="-lcunit" CUNIT_CFLAGS="" AC_SUBST([CUNIT_LIBS]) AC_SUBST([CUNIT_CFLAGS]) fi fi if test "x${have_cunit}" = "xyes"; then # cunit in Mac OS X requires ncurses. Note that in Mac OS X, test # program can be built without -lncurses, but it emits runtime # error. case "${build}" in *-apple-darwin*) CUNIT_LIBS="$CUNIT_LIBS -lncurses" AC_SUBST([CUNIT_LIBS]) ;; esac fi AM_CONDITIONAL([HAVE_CUNIT], [ test "x${have_cunit}" = "xyes" ]) # libev (for src) # libev does not have pkg-config file. Check it in an old way. LIBS_OLD=$LIBS # android requires -lm for floor AC_CHECK_LIB([ev], [ev_time], [have_libev=yes], [have_libev=no], [-lm]) if test "x${have_libev}" = "xyes"; then AC_CHECK_HEADER([ev.h], [have_libev=yes], [have_libev=no]) if test "x${have_libev}" = "xyes"; then LIBEV_LIBS=-lev LIBEV_CFLAGS= AC_SUBST([LIBEV_LIBS]) AC_SUBST([LIBEV_CFLAGS]) fi fi LIBS=$LIBS_OLD # openssl (for src) PKG_CHECK_MODULES([OPENSSL], [openssl >= 1.0.1], [have_openssl=yes], [have_openssl=no]) if test "x${have_openssl}" = "xno"; then AC_MSG_NOTICE($OPENSSL_PKG_ERRORS) fi # libevent_openssl (for examples) # 2.0.8 is required because we use evconnlistener_set_error_cb() PKG_CHECK_MODULES([LIBEVENT_OPENSSL], [libevent_openssl >= 2.0.8], [have_libevent_openssl=yes], [have_libevent_openssl=no]) if test "x${have_libevent_openssl}" = "xno"; then AC_MSG_NOTICE($LIBEVENT_OPENSSL_PKG_ERRORS) fi # jansson (for src/nghttp, src/deflatehd and src/inflatehd) PKG_CHECK_MODULES([JANSSON], [jansson >= 2.5], [have_jansson=yes], [have_jansson=no]) if test "x${have_jansson}" = "xyes"; then AC_DEFINE([HAVE_JANSSON], [1], [Define to 1 if you have `libjansson` library.]) else AC_MSG_NOTICE($JANSSON_PKG_ERRORS) fi # libxml2 (for src/nghttp) have_libxml2=no if test "x${request_libxml2}" != "xno"; then AM_PATH_XML2(2.7.7, [have_libxml2=yes], [have_libxml2=no]) if test "x${have_libxml2}" = "xyes"; then AC_DEFINE([HAVE_LIBXML2], [1], [Define to 1 if you have `libxml2` library.]) fi fi if test "x${request_libxml2}" = "xyes" && test "x${have_libxml2}" != "xyes"; then AC_MSG_ERROR([libxml2 was requested (--with-libxml2) but not found]) fi AM_CONDITIONAL([HAVE_LIBXML2], [ test "x${have_libxml2}" = "xyes" ]) # jemalloc have_jemalloc=no if test "x${request_jemalloc}" != "xno"; then LIBS_OLD=$LIBS AC_SEARCH_LIBS([malloc_stats_print], [jemalloc], [have_jemalloc=yes], [], [$PTHREAD_LDFLAGS]) LIBS=$LIBS_OLD if test "x${have_jemalloc}" = "xyes"; then jemalloc_libs=${ac_cv_search_malloc_stats_print} else # On Darwin, malloc_stats_print is je_malloc_stats_print AC_SEARCH_LIBS([je_malloc_stats_print], [jemalloc], [have_jemalloc=yes], [], [$PTHREAD_LDFLAGS]) LIBS=$LIBS_OLD if test "x${have_jemalloc}" = "xyes"; then jemalloc_libs=${ac_cv_search_je_malloc_stats_print} fi fi if test "x${have_jemalloc}" = "xyes" && test "x${jemalloc_libs}" != "xnone required"; then JEMALLOC_LIBS=${jemalloc_libs} AC_SUBST([JEMALLOC_LIBS]) fi fi if test "x${request_jemalloc}" = "xyes" && test "x${have_jemalloc}" != "xyes"; then AC_MSG_ERROR([jemalloc was requested (--with-jemalloc) but not found]) fi # spdylay (for src/nghttpx and src/h2load) have_spdylay=no if test "x${request_spdylay}" != "xno"; then PKG_CHECK_MODULES([LIBSPDYLAY], [libspdylay >= 1.3.2], [have_spdylay=yes], [have_spdylay=no]) if test "x${have_spdylay}" = "xyes"; then AC_DEFINE([HAVE_SPDYLAY], [1], [Define to 1 if you have `spdylay` library.]) else AC_MSG_NOTICE($LIBSPDYLAY_PKG_ERRORS) AC_MSG_NOTICE([The SPDY support in nghttpx and h2load will be disabled.]) fi fi if test "x${request_spdylay}" = "xyes" && test "x${have_spdylay}" != "xyes"; then AC_MSG_ERROR([spdylay was requested (--with-spdylay) but not found]) fi AM_CONDITIONAL([HAVE_SPDYLAY], [ test "x${have_spdylay}" = "xyes" ]) # mruby (for src/nghttpx) have_mruby=no if test "x${request_mruby}" = "xyes"; then # We are going to build mruby have_mruby=yes AC_DEFINE([HAVE_MRUBY], [1], [Define to 1 if you have `mruby` library.]) LIBMRUBY_LIBS="-lmruby -lm" LIBMRUBY_CFLAGS= AC_SUBST([LIBMRUBY_LIBS]) AC_SUBST([LIBMRUBY_CFLAGS]) fi AM_CONDITIONAL([HAVE_MRUBY], [test "x${have_mruby}" = "xyes"]) # Check Boost Asio library have_asio_lib=no if test "x${request_asio_lib}" = "xyes"; then AX_BOOST_BASE([1.54.0], [have_boost_base=yes], [have_boost_base=no]) if test "x${have_boost_base}" = "xyes"; then AX_BOOST_ASIO() AX_BOOST_SYSTEM() AX_BOOST_THREAD() if test "x${ax_cv_boost_asio}" = "xyes" && test "x${ax_cv_boost_system}" = "xyes" && test "x${ax_cv_boost_thread}" = "xyes"; then have_asio_lib=yes fi fi fi # The nghttp, nghttpd and nghttpx under src depend on zlib, OpenSSL # and libev enable_app=no if test "x${request_app}" != "xno" && test "x${have_zlib}" = "xyes" && test "x${have_openssl}" = "xyes" && test "x${have_libev}" = "xyes"; then enable_app=yes fi if test "x${request_app}" = "xyes" && test "x${enable_app}" != "xyes"; then AC_MSG_ERROR([applications were requested (--enable-app) but dependencies are not met.]) fi AM_CONDITIONAL([ENABLE_APP], [ test "x${enable_app}" = "xyes" ]) enable_hpack_tools=no # HPACK tools requires jansson if test "x${request_hpack_tools}" != "xno" && test "x${have_jansson}" = "xyes"; then enable_hpack_tools=yes fi if test "x${request_hpack_tools}" = "xyes" && test "x${enable_hpack_tools}" != "xyes"; then AC_MSG_ERROR([HPACK tools were requested (--enable-hpack-tools) but dependencies are not met.]) fi AM_CONDITIONAL([ENABLE_HPACK_TOOLS], [ test "x${enable_hpack_tools}" = "xyes" ]) # C++ library libnghttp2_asio enable_asio_lib=no if test "x${request_asio_lib}" != "xno" && test "x${have_asio_lib}" = "xyes"; then enable_asio_lib=yes fi AM_CONDITIONAL([ENABLE_ASIO_LIB], [ test "x${enable_asio_lib}" = "xyes" ]) # The example programs depend on OpenSSL and libevent_openssl enable_examples=no if test "x${request_examples}" != "xno" && test "x${have_openssl}" = "xyes" && test "x${have_libevent_openssl}" = "xyes"; then enable_examples=yes fi if test "x${request_examples}" = "xyes" && test "x${enable_examples}" != "xyes"; then AC_MSG_ERROR([examples were requested (--enable-examples) but dependencies are not met.]) fi AM_CONDITIONAL([ENABLE_EXAMPLES], [ test "x${enable_examples}" = "xyes" ]) # third-party only be built when needed enable_third_party=no if test "x${enable_examples}" = "xyes" || test "x${enable_app}" = "xyes" || test "x${enable_hpack_tools}" = "xyes" || test "x${enable_asio_lib}" = "xyes"; then enable_third_party=yes fi AM_CONDITIONAL([ENABLE_THIRD_PARTY], [ test "x${enable_third_party}" = "xyes" ]) # Python bindings enable_python_bindings=no if test "x${request_python_bindings}" != "xno" && test "x${CYTHON}" != "x" && test "x${PYTHON}" != "x:" && test "x${have_python_dev}" = "xyes"; then enable_python_bindings=yes fi if test "x${request_python_bindings}" = "xyes" && test "x${enable_python_bindings}" != "xyes"; then AC_MSG_ERROR([python bindings were requested (--enable-python-bindings) but dependencies are not met.]) fi AM_CONDITIONAL([ENABLE_PYTHON_BINDINGS], [test "x${enable_python_bindings}" = "xyes"]) # Produce cython conditional, so that we can distribute generated C # source AM_CONDITIONAL([HAVE_CYTHON], [test "x${CYTHON}" != "x"]) # failmalloc tests enable_failmalloc=no if test "x${request_failmalloc}" = "xyes"; then enable_failmalloc=yes fi AM_CONDITIONAL([ENABLE_FAILMALLOC], [ test "x${enable_failmalloc}" = "xyes" ]) # Checks for header files. AC_HEADER_ASSERT AC_CHECK_HEADERS([ \ arpa/inet.h \ fcntl.h \ inttypes.h \ limits.h \ netdb.h \ netinet/in.h \ pwd.h \ stddef.h \ stdint.h \ stdlib.h \ string.h \ sys/socket.h \ sys/time.h \ syslog.h \ time.h \ unistd.h \ ]) # Checks for typedefs, structures, and compiler characteristics. AC_TYPE_SIZE_T AC_TYPE_SSIZE_T AC_TYPE_UINT8_T AC_TYPE_UINT16_T AC_TYPE_UINT32_T AC_TYPE_UINT64_T AC_TYPE_INT8_T AC_TYPE_INT16_T AC_TYPE_INT32_T AC_TYPE_INT64_T AC_TYPE_OFF_T AC_TYPE_PID_T AC_TYPE_UID_T AC_CHECK_TYPES([ptrdiff_t]) AC_C_BIGENDIAN AC_C_INLINE AC_SYS_LARGEFILE AC_CHECK_MEMBER([struct tm.tm_gmtoff], [have_struct_tm_tm_gmtoff=yes], [have_struct_tm_tm_gmtoff=no], [[#include ]]) if test "x$have_struct_tm_tm_gmtoff" = "xyes"; then AC_DEFINE([HAVE_STRUCT_TM_TM_GMTOFF], [1], [Define to 1 if you have `struct tm.tm_gmtoff` member.]) fi # Check size of pointer to decide we need 8 bytes alignment # adjustment. AC_CHECK_SIZEOF([int *]) AC_CHECK_SIZEOF([time_t]) # Checks for library functions. # Don't check malloc, since it does not play nicely with C++ stdlib # AC_FUNC_MALLOC AC_FUNC_CHOWN AC_FUNC_ERROR_AT_LINE AC_FUNC_FORK # Don't check realloc, since LeakSanitizer detects memory leak during check # AC_FUNC_REALLOC AC_FUNC_STRERROR_R AC_FUNC_STRNLEN AC_CHECK_FUNCS([ \ _Exit \ accept4 \ dup2 \ getcwd \ getpwnam \ localtime_r \ memchr \ memmove \ memset \ socket \ sqrt \ strchr \ strdup \ strerror \ strndup \ strstr \ strtol \ strtoul \ timegm \ ]) # timerfd_create was added in linux kernel 2.6.25 AC_CHECK_FUNC([timerfd_create], [have_timerfd_create=yes], [have_timerfd_create=no]) # Checks for epoll availability, primarily for examples/tiny-nghttpd AX_HAVE_EPOLL([have_epoll=yes], [have_epoll=no]) AM_CONDITIONAL([ENABLE_TINY_NGHTTPD], [ test "x${have_epoll}" = "xyes" && test "x${have_timerfd_create}" = "xyes"]) ac_save_CFLAGS=$CFLAGS CFLAGS= if test "x$werror" != "xno"; then AX_CHECK_COMPILE_FLAG([-Wall], [CFLAGS="$CFLAGS -Wall"]) AX_CHECK_COMPILE_FLAG([-Wextra], [CFLAGS="$CFLAGS -Wextra"]) AX_CHECK_COMPILE_FLAG([-Werror], [CFLAGS="$CFLAGS -Werror"]) AX_CHECK_COMPILE_FLAG([-Wmissing-prototypes], [CFLAGS="$CFLAGS -Wmissing-prototypes"]) AX_CHECK_COMPILE_FLAG([-Wstrict-prototypes], [CFLAGS="$CFLAGS -Wstrict-prototypes"]) AX_CHECK_COMPILE_FLAG([-Wmissing-declarations], [CFLAGS="$CFLAGS -Wmissing-declarations"]) AX_CHECK_COMPILE_FLAG([-Wpointer-arith], [CFLAGS="$CFLAGS -Wpointer-arith"]) AX_CHECK_COMPILE_FLAG([-Wdeclaration-after-statement], [CFLAGS="$CFLAGS -Wdeclaration-after-statement"]) AX_CHECK_COMPILE_FLAG([-Wformat-security], [CFLAGS="$CFLAGS -Wformat-security"]) AX_CHECK_COMPILE_FLAG([-Wwrite-strings], [CFLAGS="$CFLAGS -Wwrite-strings"]) AX_CHECK_COMPILE_FLAG([-Wshadow], [CFLAGS="$CFLAGS -Wshadow"]) AX_CHECK_COMPILE_FLAG([-Winline], [CFLAGS="$CFLAGS -Winline"]) AX_CHECK_COMPILE_FLAG([-Wnested-externs], [CFLAGS="$CFLAGS -Wnested-externs"]) AX_CHECK_COMPILE_FLAG([-Wfloat-equal], [CFLAGS="$CFLAGS -Wfloat-equal"]) AX_CHECK_COMPILE_FLAG([-Wundef], [CFLAGS="$CFLAGS -Wundef"]) AX_CHECK_COMPILE_FLAG([-Wendif-labels], [CFLAGS="$CFLAGS -Wendif-labels"]) AX_CHECK_COMPILE_FLAG([-Wempty-body], [CFLAGS="$CFLAGS -Wempty-body"]) AX_CHECK_COMPILE_FLAG([-Wcast-align], [CFLAGS="$CFLAGS -Wcast-align"]) AX_CHECK_COMPILE_FLAG([-Wclobbered], [CFLAGS="$CFLAGS -Wclobbered"]) AX_CHECK_COMPILE_FLAG([-Wvla], [CFLAGS="$CFLAGS -Wvla"]) AX_CHECK_COMPILE_FLAG([-Wpragmas], [CFLAGS="$CFLAGS -Wpragmas"]) AX_CHECK_COMPILE_FLAG([-Wunreachable-code], [CFLAGS="$CFLAGS -Wunreachable-code"]) AX_CHECK_COMPILE_FLAG([-Waddress], [CFLAGS="$CFLAGS -Waddress"]) AX_CHECK_COMPILE_FLAG([-Wattributes], [CFLAGS="$CFLAGS -Wattributes"]) AX_CHECK_COMPILE_FLAG([-Wdiv-by-zero], [CFLAGS="$CFLAGS -Wdiv-by-zero"]) AX_CHECK_COMPILE_FLAG([-Wshorten-64-to-32], [CFLAGS="$CFLAGS -Wshorten-64-to-32"]) AX_CHECK_COMPILE_FLAG([-Wconversion], [CFLAGS="$CFLAGS -Wconversion"]) AX_CHECK_COMPILE_FLAG([-Wextended-offsetof], [CFLAGS="$CFLAGS -Wextended-offsetof"]) AX_CHECK_COMPILE_FLAG([-Wformat-nonliteral], [CFLAGS="$CFLAGS -Wformat-nonliteral"]) AX_CHECK_COMPILE_FLAG([-Wlanguage-extension-token], [CFLAGS="$CFLAGS -Wlanguage-extension-token"]) AX_CHECK_COMPILE_FLAG([-Wmissing-field-initializers], [CFLAGS="$CFLAGS -Wmissing-field-initializers"]) AX_CHECK_COMPILE_FLAG([-Wmissing-noreturn], [CFLAGS="$CFLAGS -Wmissing-noreturn"]) AX_CHECK_COMPILE_FLAG([-Wmissing-variable-declarations], [CFLAGS="$CFLAGS -Wmissing-variable-declarations"]) # Not used because we cannot change public structs # AX_CHECK_COMPILE_FLAG([-Wpadded], [CFLAGS="$CFLAGS -Wpadded"]) AX_CHECK_COMPILE_FLAG([-Wsign-conversion], [CFLAGS="$CFLAGS -Wsign-conversion"]) # Not used because this basically disallows default case # AX_CHECK_COMPILE_FLAG([-Wswitch-enum], [CFLAGS="$CFLAGS -Wswitch-enum"]) AX_CHECK_COMPILE_FLAG([-Wunreachable-code-break], [CFLAGS="$CFLAGS -Wunreachable-code-break"]) AX_CHECK_COMPILE_FLAG([-Wunused-macros], [CFLAGS="$CFLAGS -Wunused-macros"]) AX_CHECK_COMPILE_FLAG([-Wunused-parameter], [CFLAGS="$CFLAGS -Wunused-parameter"]) # Only work with Clang for the moment AX_CHECK_COMPILE_FLAG([-Wheader-guard], [CFLAGS="$CFLAGS -Wheader-guard"]) fi WARNCFLAGS=$CFLAGS CFLAGS=$ac_save_CFLAGS AC_SUBST([WARNCFLAGS]) if test "x$debug" != "xno"; then AC_DEFINE([DEBUGBUILD], [1], [Define to 1 to enable debug output.]) fi enable_threads=yes # Some platform does not have working std::future. 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