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=""}
###############################################################################
## Build environment discovery
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_MACRO_DIR([m4])
AC_USE_SYSTEM_EXTENSIONS
AC_CANONICAL_HOST
AC_LANG([C++])
AC_PROG_CXX
AC_PROG_CXXCPP
AX_CXX_COMPILE_STDCXX_11([noext])
LT_INIT
AM_INIT_AUTOMAKE([1.14 dist-bzip2 dist-xz foreign subdir-objects])
AM_SILENT_RULES([yes])
AC_CONFIG_HEADERS([config.h])
AX_APPEND_FLAG([-include config.h])
###############################################################################
## Major compilation options
AC_ARG_ENABLE([debugging],
[AS_HELP_STRING([--enable-debugging], [enables developer debugging support])]
)
AC_ARG_ENABLE([mudflap],
[AS_HELP_STRING([--enable-mudflap], [enable mudflap runtime debugging])]
)
###############################################################################
## Warnings
AX_APPEND_COMPILE_FLAGS([-Wall])
AX_APPEND_COMPILE_FLAGS([-Wextra])
AX_APPEND_COMPILE_FLAGS([-Wno-parentheses])
AX_APPEND_COMPILE_FLAGS([-Wpointer-arith])
AX_APPEND_COMPILE_FLAGS([-Wcast-qual])
AX_APPEND_COMPILE_FLAGS([-Wcast-align])
AX_APPEND_COMPILE_FLAGS([-Wsign-compare])
AX_APPEND_COMPILE_FLAGS([-Wsign-conversion])
AX_APPEND_COMPILE_FLAGS([-Wtype-limits])
AX_APPEND_COMPILE_FLAGS([-Wfloat-equal])
AX_APPEND_COMPILE_FLAGS([-Wunused-parameter])
AX_APPEND_COMPILE_FLAGS([-Wunused-but-set-variable])
AX_APPEND_COMPILE_FLAGS([-Wshadwo])
AX_APPEND_COMPILE_FLAGS([-Wredundant-decls])
AX_APPEND_COMPILE_FLAGS([-pedantic])
######################################################################
## Platform compilation helpers
AX_APPEND_COMPILE_FLAGS([-fno-common])
AX_APPEND_COMPILE_FLAGS([-fno-nonansi-builtins])
AX_APPEND_COMPILE_FLAGS([-fno-deduce-init-list])
###############################################################################
## 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([$ac_cv_search_clock_gettime])
])
###############################################################################
## Debug features
AS_IF([test "x$enable_debugging" = "xyes"], [
AS_IF([test "x$enable_mudflap" = "xyes"], [
AX_APPEND_COMPILE_FLAGS([-fmudflapth])
AX_APPEND_LINK_FLAGS([-lmudflapth])
])
AX_APPEND_COMPILE_FLAGS([-ggdb])
AC_DEFINE([ENABLE_DEBUGGING], [], [Debugging support enabled])
AC_DEFINE([_GLIBCXX_DEBUG], [], [Use glibcxx debugging mode])
AX_APPEND_COMPILE_FLAGS([-O0])
], [
AX_APPEND_COMPILE_FLAGS([-02])
AX_APPEND_COMPILE_FLAGS([-flto=8])
AX_APPEND_COMPILE_FLAGS([-flto-partition=none])
AX_APPEND_LINK_FLAGS([-flto=8])
AX_APPEND_LINK_FLAGS([-flto-partition=none])
AX_APPEND_LINK_FLAGS([-fwhole-program])
])
AS_CASE([$host_os],
[mingw32], [
AX_APPEND_COMPILE_FLAGS([-gstabs])
## HACK: Stop multiple defines from boost exception rethrowers
## terminating the build. Works around boost bug #4258.
AX_APPEND_COMPILE_FLAGS([-Wl,--allow-multiple-definition])
],
[linux-gnu], [
AX_APPEND_COMPILE_FLAGS([-g])
AX_APPEND_COMPILE_FLAGS([-ggdb])
],
[AC_MSG_WARN([Unknown host_os])]
)
###############################################################################
## Documentation
###############################################################################
## Required packages
CHECK_RAGEL([ip.cpp])
AX_BOOST_BASE([1.52], [], [AC_MSG_ERROR([Boost version >= 1.52 required])])
AC_SUBST(BOOST_CPPFLAGS)
AC_SUBST(BOOST_LDFLAGS)
# 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_FILESYSTEM
AC_SUBST(BOOST_FILESYSTEM_LIB)
AS_IF([text "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])
],
[i686], [
AX_APPEND_COMPILE_FLAGS([-march=prescott])
AX_APPEND_COMPILE_FLAGS([-mtune=generic])
AX_APPEND_COMPILE_FLAGS([-mfpmath=sse])
],
[AC_MSG_WARN([unknown host_cpu])]
)
AX_APPEND_COMPILE_FLAGS([-pipe])
###############################################################################
## Output
AC_CONFIG_FILES([
Doxyfile
Makefile
test/Makefile
])
AC_OUTPUT