AC_INIT([libgim], [0.1.0], [danny@nerdcruft.net]) ## Explicitly set an empty CXXFLAGS if not present to prevent AC_PROG_CXX from ## generating a default -O2. This allows us to manually select -O0 when ## debugging is enabled. : ${CXXFLAGS=""} ############################################################################### ## Build environment discovery AC_CONFIG_AUX_DIR([build-aux]) AC_REQUIRE_AUX_FILE([tap-driver.sh]) AC_CONFIG_MACRO_DIR([m4]) AC_USE_SYSTEM_EXTENSIONS AC_CANONICAL_HOST LT_INIT AC_LANG([C++]) AC_PROG_CXX AC_PROG_CXXCPP AX_APPEND_COMPILE_FLAGS([-std=c++1y]) AX_COMPILER_VENDOR AM_INIT_AUTOMAKE([1.14 dist-bzip2 dist-xz foreign subdir-objects]) AM_SILENT_RULES([yes]) AC_CONFIG_HEADERS([config.h]) ############################################################################### ## Major compilation options AC_ARG_ENABLE([debugging], [AS_HELP_STRING([--enable-debugging], [enables developer debugging support])] ) AC_ARG_ENABLE([sanitizer], [ AS_HELP_STRING([--enable-sanitizer], [enable memory sanitizer]) ]) ############################################################################### ## Warnings ## ## Note: GCC will silently accept warnings that it doesn't handle but then ## complain about them at the first legitimate warning discovered in a source ## file. To work around this we have to detect GCC. # Compound warnings AX_APPEND_COMPILE_FLAGS([-Wall], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wextra], [], [-Werror]) # General warnings AX_APPEND_COMPILE_FLAGS([-Wcast-align], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wcast-qual], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wfloat-conversion], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wfloat-equal], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wno-aggressive-loop-optimizations], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wnoexcept], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wnon-virtual-dtor], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wno-parentheses], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wpointer-arith], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wredundant-decls], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wshadow], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wsign-compare], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wsign-promo], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wstrict-aliasing], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wstrict-overflow], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wtype-limits], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wunused-but-set-variable], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wunused-parameter], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wuseless-cast], [], [-Werror]) # Required extensions #AX_APPEND_COMPILE_FLAGS([-Wgnu-flexible-array-union-member], [], [-Werror]) #AX_APPEND_COMPILE_FLAGS([-Wno-c99-extensions], [], [-Werror]) #AX_APPEND_COMPILE_FLAGS([-Wno-vla-extension], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wno-vla], [], [-Werror]) AS_IF([test "x$ax_cv_cxx_compiler_vendor" != "xgnu"], [ AX_APPEND_COMPILE_FLAGS([-Wno-c99-extensions], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wno-flexible-array-extensions], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wno-gnu-conditional-omitted-operand], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wno-gnu-empty-struct], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wno-gnu-flexible-array-union-member], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wno-gnu-zero-variadic-macro-arguments], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wno-vla-extension], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wno-zero-length-array], [], [-Werror]) ]) # Excessive warnings AX_APPEND_COMPILE_FLAGS([-Wno-missing-braces], [], [-Werror]) AS_IF([test "x$ax_cv_cxx_compiler_vendor" != "xgnu"], [ AX_APPEND_COMPILE_FLAGS([-Wno-nested-anon-types], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-Wno-unused-const-variable], [], [-Werror]) ]) #AX_APPEND_COMPILE_FLAGS([-Wunsafe-loop-optimizations], [], [-Werror]) #AX_APPEND_COMPILE_FLAGS([-Winline], [], [-Werror]) #AX_APPEND_COMPILE_FLAGS([-Wconversion], [], [-Werror]) #AX_APPEND_COMPILE_FLAGS([-Wdouble-promotion], [], [-Werror]) #AX_APPEND_COMPILE_FLAGS([-Wold-style-cast], [], [-Werror]) #AX_APPEND_COMPILE_FLAGS([-Woverloaded-virtual], [], [-Werror]) #AX_APPEND_COMPILE_FLAGS([-Wsign-conversion], [], [-Werror]) # Strict warnings AX_APPEND_COMPILE_FLAGS([-pedantic], [], [-Werror]) ###################################################################### ## Platform compilation helpers AX_APPEND_COMPILE_FLAGS([-fno-common], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-fno-nonansi-builtins], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-fno-deduce-init-list], [], [-Werror]) ############################################################################### ## Compiler features AC_C_CONST AC_C_RESTRICT AC_C_INLINE AC_COMPILE_IFELSE([AC_LANG_PROGRAM([struct A { virtual void C (void) = 0; }; struct B : A { void C (void) override; }; ], [])], [], [AC_DEFINE([override], [], [Pretend about override keyword support])]) AC_COMPILE_IFELSE([AC_LANG_PROGRAM([struct A final { }; ], [])], [], [AC_DEFINE([final], [], [Pretend about final keyword support])]) ############################################################################### ## Architecture features AC_C_BIGENDIAN ############################################################################### ## Useful headers or platform features AC_TYPE_SIZE_T AC_TYPE_SSIZE_T ############################################################################### ## Platform features AS_CASE([$host_os], [mingw32], [ AM_CONDITIONAL([PLATFORM_WIN32], [true]) AM_CONDITIONAL([PLATFORM_LINUX], [false]) AC_CHECK_HEADERS([winsock2.h ws2tcpip.h]) AC_SUBST([NET_LIBS], [-lws2_32]) ], [linux-gnu], [ AM_CONDITIONAL([PLATFORM_WIN32], [false]) AM_CONDITIONAL([PLATFORM_LINUX], [true]) ], [AC_ERROR([Unknown host_os])] ) AC_FUNC_MMAP AC_CHECK_FUNC([strndup], [ AC_DEFINE([HAVE_STRNDUP], [], [strndup appears to be present]) ]) AC_CHECK_HEADER([execinfo.h], [break]) AM_CONDITIONAL([HAVE_EXECINFO], [test x$ac_cv_header_execinfo_h = "xyes"]) AC_SEARCH_LIBS([clock_gettime], [rt]) AS_IF([test "x$ac_cv_search_clock_gettime" == "x-*"], [ AX_APPEND_LINK_FLAGS([$ac_cv_search_clock_gettime], [], [-Werror]) ]) ############################################################################### ## Debug features AS_IF([test "x$enable_debugging" = "xyes"], [ AS_IF([test "x$enable_sanitizer" = "xyes"], [ AX_APPEND_COMPILE_FLAGS([-fsanitize=address], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-fsanitize=undefined], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-fsanitize=leak], [], [-Werror]) AX_APPEND_LINK_FLAGS([-fsanitize=address], [], [-Werror]) AX_APPEND_LINK_FLAGS([-fsanitize=undefined], [], [-Werror]) AX_APPEND_LINK_FLAGS([-fsanitize=leak], [], [-Werror]) AX_APPEND_LINK_FLAGS([-lasan], [], [-Werror]) AX_APPEND_LINK_FLAGS([-lubsan], [], [-Werror]) ]) AX_APPEND_COMPILE_FLAGS([-ggdb], [], [-Werror]) AX_APPEND_LINK_FLAGS([-rdynamic]) AC_DEFINE([ENABLE_DEBUGGING], [], [Debugging support enabled], [], [-Werror]) AC_DEFINE([_GLIBCXX_DEBUG], [], [Use glibcxx debugging mode], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-O0], [], [-Werror]) ], [ AX_APPEND_COMPILE_FLAGS([-O2], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-ftree-loop-distribute-patterns], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-ftree-loop-if-convert-stores], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-ftree-vectorize], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-funsafe-loop-optimizations], [], [-Werror]) # gcc >= 4.8 defaults to enabling stack-protector, we care more about # performance than security. AX_APPEND_COMPILE_FLAGS([-fno-stack-protector], [], [-Werror]) # mingw LTO support currently appears to be broken AS_IF([test x"${host_os}" != x"mingw32"], [ AX_APPEND_COMPILE_FLAGS([-flto]) AX_APPEND_LINK_FLAGS([-fuse-linker-plugin], [], [-Werror]) ]) ]) AS_CASE([$host_os], [mingw32], [ AX_APPEND_COMPILE_FLAGS([-gstabs], [], [-Werror]) ], [linux-gnu], [ AX_APPEND_COMPILE_FLAGS([-g], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-ggdb], [], [-Werror]) ], [AC_MSG_WARN([Unknown host_os])] ) ############################################################################### ## Documentation ############################################################################### ## Required packages CHECK_RAGEL([ip.cpp]) AX_BOOST_BASE([1.53], [], [AC_MSG_ERROR([Boost version >= 1.53 required])]) # boost-system isn't a hard requirement, it's only really used to fulfill # some other dependency I've since forgotten about... AX_BOOST_SYSTEM AX_BOOST_THREAD AS_IF([test "x$ax_cv_boost_thread" != "xyes"], [ AC_MSG_ERROR("boost-thread is a hard requirement") ]) AX_BOOST_FILESYSTEM AS_IF([test "x$ax_cv_boost_filesystem" != "xyes"], [ AC_MSG_ERROR("boost-filesystem is a hard requirement") ]) ############################################################################### ## Optional packages PKG_CHECK_MODULES([ZLIB], [zlib >= 1.2.0]) AC_SUBST(ZLIB_CFLAGS) AC_SUBST(ZLIB_LIBS) ############################################################################### ## Performance and build optimisations AS_CASE([$host_cpu], [x86_64], [ AX_APPEND_COMPILE_FLAGS([-mtune=generic], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-msse], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-msse2], [], [-Werror]) ], [i686], [ AX_APPEND_COMPILE_FLAGS([-march=prescott], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-mtune=generic], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-mcmov], [], [-Werror]) ], [AC_MSG_WARN([unknown host_cpu])] ) AX_APPEND_COMPILE_FLAGS([-pipe], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-mfpmath=sse], [], [-Werror]) AX_APPEND_COMPILE_FLAGS([-msahf], [], [-Werror]) ############################################################################### ## Output # inclusion of config.h has to go after compilation tests otherwise we risk # failure on a clean build AX_APPEND_FLAG([-include config.h]) AC_CONFIG_FILES([ Doxyfile Makefile test/Makefile ]) AC_CONFIG_FILES([test/json.test], [chmod a+x test/json.test]) AC_OUTPUT