libcruft-util/configure.ac

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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=""}
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###############################################################################
## Build environment discovery
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AC_CONFIG_AUX_DIR([build-aux])
AC_REQUIRE_AUX_FILE([tap-driver.sh])
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AC_CONFIG_MACRO_DIR([m4])
AC_USE_SYSTEM_EXTENSIONS
AC_CANONICAL_HOST
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LT_INIT
AC_LANG([C++])
AC_PROG_CXX
AC_PROG_CXXCPP
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AX_APPEND_COMPILE_FLAGS([-std=c++1y])
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AX_COMPILER_VENDOR
AM_INIT_AUTOMAKE([1.14 dist-bzip2 dist-xz foreign subdir-objects])
AM_SILENT_RULES([yes])
AC_CONFIG_HEADERS([config.h])
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###############################################################################
## Major compilation options
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AC_ARG_ENABLE([debugging],
[AS_HELP_STRING([--enable-debugging], [enables developer debugging support])]
)
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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.
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# Compound warnings
AX_APPEND_COMPILE_FLAGS([-Wall], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-Wextra], [], [-Werror])
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# General warnings
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AX_APPEND_COMPILE_FLAGS([-Wcast-align], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-Wcast-qual], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-Wfloat-conversion], [], [-Werror])
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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])
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AX_APPEND_COMPILE_FLAGS([-Wredundant-decls], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-Wshadow], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-Wsign-compare], [], [-Werror])
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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])
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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])
])
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#AX_APPEND_COMPILE_FLAGS([-Wunsafe-loop-optimizations], [], [-Werror])
#AX_APPEND_COMPILE_FLAGS([-Winline], [], [-Werror])
#AX_APPEND_COMPILE_FLAGS([-Wconversion], [], [-Werror])
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#AX_APPEND_COMPILE_FLAGS([-Wdouble-promotion], [], [-Werror])
#AX_APPEND_COMPILE_FLAGS([-Wold-style-cast], [], [-Werror])
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#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])
###############################################################################
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## Compiler features
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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])])
###############################################################################
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## Architecture features
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AC_C_BIGENDIAN
###############################################################################
## Useful headers or platform features
AC_TYPE_SIZE_T
AC_TYPE_SSIZE_T
###############################################################################
## Platform features
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AS_CASE([$host_os],
[mingw32], [
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AM_CONDITIONAL([PLATFORM_WIN32], [true])
AM_CONDITIONAL([PLATFORM_LINUX], [false])
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AC_CHECK_HEADERS([winsock2.h ws2tcpip.h])
AC_SUBST([NET_LIBS], [-lws2_32])
],
[linux-gnu], [
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AM_CONDITIONAL([PLATFORM_WIN32], [false])
AM_CONDITIONAL([PLATFORM_LINUX], [true])
],
[AC_ERROR([Unknown host_os])]
)
AC_FUNC_MMAP
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AC_CHECK_FUNC([strndup], [
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AC_DEFINE([HAVE_STRNDUP], [], [strndup appears to be present])
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])
AC_CHECK_HEADER([execinfo.h], [break])
AM_CONDITIONAL([HAVE_EXECINFO], [test x$ac_cv_header_execinfo_h = "xyes"])
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AC_SEARCH_LIBS([clock_gettime], [rt])
AS_IF([test "x$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"], [
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AS_IF([test "x$enable_sanitizer" = "xyes"], [
AX_APPEND_COMPILE_FLAGS([-fsanitize=address], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-fsanitize=undefined], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-fsanitize=leak], [], [-Werror])
AX_APPEND_LINK_FLAGS([-fsanitize=address], [], [-Werror])
AX_APPEND_LINK_FLAGS([-fsanitize=undefined], [], [-Werror])
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AX_APPEND_LINK_FLAGS([-fsanitize=leak], [], [-Werror])
AX_APPEND_LINK_FLAGS([-lasan], [], [-Werror])
AX_APPEND_LINK_FLAGS([-lubsan], [], [-Werror])
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])
AX_APPEND_COMPILE_FLAGS([-ggdb], [], [-Werror])
AX_APPEND_LINK_FLAGS([-rdynamic])
AC_DEFINE([ENABLE_DEBUGGING], [], [Debugging support enabled], [], [-Werror])
AC_DEFINE([_GLIBCXX_DEBUG], [], [Use glibcxx debugging mode], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-O0], [], [-Werror])
], [
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AX_APPEND_COMPILE_FLAGS([-O2], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-ftree-loop-distribute-patterns], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-ftree-loop-if-convert-stores], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-ftree-vectorize], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-funsafe-loop-optimizations], [], [-Werror])
# gcc >= 4.8 defaults to enabling stack-protector, we care more about
# performance than security.
AX_APPEND_COMPILE_FLAGS([-fno-stack-protector], [], [-Werror])
# mingw LTO support currently appears to be broken
AS_IF([test x"${host_os}" != x"mingw32"], [
AX_APPEND_COMPILE_FLAGS([-flto])
AX_APPEND_LINK_FLAGS([-fuse-linker-plugin], [], [-Werror])
])
])
AS_CASE([$host_os],
[mingw32], [
AX_APPEND_COMPILE_FLAGS([-gstabs], [], [-Werror])
],
[linux-gnu], [
AX_APPEND_COMPILE_FLAGS([-g], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-ggdb], [], [-Werror])
],
[AC_MSG_WARN([Unknown host_os])]
)
###############################################################################
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## Documentation
###############################################################################
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## Required packages
CHECK_RAGEL([ip.cpp])
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AX_BOOST_BASE([1.53], [], [AC_MSG_ERROR([Boost version >= 1.53 required])])
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# boost-system isn't a hard requirement, it's only really used to fulfill
# some other dependency I've since forgotten about...
AX_BOOST_SYSTEM
AX_BOOST_THREAD
AS_IF([test "x$ax_cv_boost_thread" != "xyes"], [
AC_MSG_ERROR("boost-thread is a hard requirement")
])
AX_BOOST_FILESYSTEM
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AS_IF([test "x$ax_cv_boost_filesystem" != "xyes"], [
AC_MSG_ERROR("boost-filesystem is a hard requirement")
])
###############################################################################
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## Optional packages
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PKG_CHECK_MODULES([ZLIB], [zlib >= 1.2.0])
AC_SUBST(ZLIB_CFLAGS)
AC_SUBST(ZLIB_LIBS)
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###############################################################################
## Performance and build optimisations
AS_CASE([$host_cpu],
[x86_64], [
AX_APPEND_COMPILE_FLAGS([-mtune=generic], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-msse], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-msse2], [], [-Werror])
],
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[i686], [
AX_APPEND_COMPILE_FLAGS([-march=prescott], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-mtune=generic], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-mcmov], [], [-Werror])
],
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[AC_MSG_WARN([unknown host_cpu])]
)
AX_APPEND_COMPILE_FLAGS([-pipe], [], [-Werror])
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AX_APPEND_COMPILE_FLAGS([-mfpmath=sse], [], [-Werror])
AX_APPEND_COMPILE_FLAGS([-msahf], [], [-Werror])
###############################################################################
## Output
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# 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([
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Doxyfile
Makefile
test/Makefile
])
AC_CONFIG_FILES([test/json.test], [chmod a+x test/json.test])
AC_OUTPUT