#*************************************************************************** # # Copyright (C) 2008 - 2013 by Daniel Stenberg et al # # Permission to use, copy, modify, and distribute this software and its # documentation for any purpose and without fee is hereby granted, provided # that the above copyright notice appear in all copies and that both that # copyright notice and this permission notice appear in supporting # documentation, and that the name of M.I.T. not be used in advertising or # publicity pertaining to distribution of the software without specific, # written prior permission. M.I.T. makes no representations about the # suitability of this software for any purpose. It is provided "as is" # without express or implied warranty. # #*************************************************************************** # File version for 'aclocal' use. Keep it a single number. # serial 11 dnl CARES_CHECK_OPTION_DEBUG dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-debug or --disable-debug, and set shell dnl variable want_debug value as appropriate. AC_DEFUN([CARES_CHECK_OPTION_DEBUG], [ AC_BEFORE([$0],[CARES_CHECK_OPTION_WARNINGS])dnl AC_BEFORE([$0],[XC_CHECK_PROG_CC])dnl AC_MSG_CHECKING([whether to enable debug build options]) OPT_DEBUG_BUILD="default" AC_ARG_ENABLE(debug, AS_HELP_STRING([--enable-debug],[Enable debug build options]) AS_HELP_STRING([--disable-debug],[Disable debug build options]), OPT_DEBUG_BUILD=$enableval) case "$OPT_DEBUG_BUILD" in no) dnl --disable-debug option used want_debug="no" ;; default) dnl configure option not specified want_debug="no" ;; *) dnl --enable-debug option used want_debug="yes" ;; esac AC_MSG_RESULT([$want_debug]) ]) dnl CARES_CHECK_OPTION_NONBLOCKING dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-nonblocking or --disable-nonblocking, and dnl set shell variable want_nonblocking as appropriate. AC_DEFUN([CARES_CHECK_OPTION_NONBLOCKING], [ AC_BEFORE([$0],[CARES_CHECK_NONBLOCKING_SOCKET])dnl AC_MSG_CHECKING([whether to enable non-blocking communications]) OPT_NONBLOCKING="default" AC_ARG_ENABLE(nonblocking, AS_HELP_STRING([--enable-nonblocking],[Enable non-blocking communications]) AS_HELP_STRING([--disable-nonblocking],[Disable non-blocking communications]), OPT_NONBLOCKING=$enableval) case "$OPT_NONBLOCKING" in no) dnl --disable-nonblocking option used want_nonblocking="no" ;; default) dnl configure option not specified want_nonblocking="yes" ;; *) dnl --enable-nonblocking option used want_nonblocking="yes" ;; esac AC_MSG_RESULT([$want_nonblocking]) ]) dnl CARES_CHECK_OPTION_OPTIMIZE dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-optimize or --disable-optimize, and set dnl shell variable want_optimize value as appropriate. AC_DEFUN([CARES_CHECK_OPTION_OPTIMIZE], [ AC_REQUIRE([CARES_CHECK_OPTION_DEBUG])dnl AC_BEFORE([$0],[XC_CHECK_PROG_CC])dnl AC_MSG_CHECKING([whether to enable compiler optimizer]) OPT_COMPILER_OPTIMIZE="default" AC_ARG_ENABLE(optimize, AS_HELP_STRING([--enable-optimize(=OPT)],[Enable compiler optimizations (default=-O2)]) AS_HELP_STRING([--disable-optimize],[Disable compiler optimizations]), OPT_COMPILER_OPTIMIZE=$enableval) case "$OPT_COMPILER_OPTIMIZE" in no) dnl --disable-optimize option used. We will handle this as dnl a request to disable compiler optimizations if possible. dnl If the compiler is known CFLAGS and CPPFLAGS will be dnl overridden, otherwise this can not be honored. want_optimize="no" AC_MSG_RESULT([no]) ;; default) dnl configure's optimize option not specified. Initially we will dnl handle this as a a request contrary to configure's setting dnl for --enable-debug. IOW, initially, for debug-enabled builds dnl this will be handled as a request to disable optimizations if dnl possible, and for debug-disabled builds this will be handled dnl initially as a request to enable optimizations if possible. dnl Finally, if the compiler is known and CFLAGS and CPPFLAGS do dnl not have any optimizer flag the request will be honored, in dnl any other case the request can not be honored. dnl IOW, existing optimizer flags defined in CFLAGS or CPPFLAGS dnl will always take precedence over any initial assumption. if test "$want_debug" = "yes"; then want_optimize="assume_no" AC_MSG_RESULT([not specified (assuming no)]) else want_optimize="assume_yes" AC_MSG_RESULT([not specified (assuming yes)]) fi ;; *) dnl --enable-optimize option used. We will handle this as dnl a request to enable compiler optimizations if possible. dnl If the compiler is known CFLAGS and CPPFLAGS will be dnl overridden, otherwise this can not be honored. want_optimize="yes" AC_MSG_RESULT([yes]) ;; esac ]) dnl CARES_CHECK_OPTION_SYMBOL_HIDING dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-symbol-hiding or --disable-symbol-hiding, dnl setting shell variable want_symbol_hiding value. AC_DEFUN([CARES_CHECK_OPTION_SYMBOL_HIDING], [ AC_BEFORE([$0],[CARES_CHECK_COMPILER_SYMBOL_HIDING])dnl AC_MSG_CHECKING([whether to enable hiding of library internal symbols]) OPT_SYMBOL_HIDING="default" AC_ARG_ENABLE(symbol-hiding, AS_HELP_STRING([--enable-symbol-hiding],[Enable hiding of library internal symbols]) AS_HELP_STRING([--disable-symbol-hiding],[Disable hiding of library internal symbols]), OPT_SYMBOL_HIDING=$enableval) case "$OPT_SYMBOL_HIDING" in no) dnl --disable-symbol-hiding option used. dnl This is an indication to not attempt hiding of library internal dnl symbols. Default symbol visibility will be used, which normally dnl exposes all library internal symbols. want_symbol_hiding="no" AC_MSG_RESULT([no]) ;; default) dnl configure's symbol-hiding option not specified. dnl Handle this as if --enable-symbol-hiding option was given. want_symbol_hiding="yes" AC_MSG_RESULT([yes]) ;; *) dnl --enable-symbol-hiding option used. dnl This is an indication to attempt hiding of library internal dnl symbols. This is only supported on some compilers/linkers. want_symbol_hiding="yes" AC_MSG_RESULT([yes]) ;; esac ]) dnl CARES_CHECK_OPTION_EXPOSE_STATICS dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-expose-statics or --disable-expose-statics, dnl setting shell variable want_expose_statics value. AC_DEFUN([CARES_CHECK_OPTION_EXPOSE_STATICS], [ AC_MSG_CHECKING([whether to expose internal static functions for testing]) OPT_EXPOSE_STATICS="default" AC_ARG_ENABLE(expose-statics, AS_HELP_STRING([--enable-expose-statics],[Enable exposure of internal static functions for testing]) AS_HELP_STRING([--disable-expose-statics],[Disable exposure of internal static functions for testing]), OPT_EXPOSE_STATICS=$enableval) case "$OPT_EXPOSE_STATICS" in no) dnl --disable-expose-statics option used. want_expose_statics="no" AC_MSG_RESULT([no]) ;; default) dnl configure's expose-statics option not specified. dnl Handle this as if --disable-expose-statics option was given. want_expose_statics="no" AC_MSG_RESULT([no]) ;; *) dnl --enable-expose-statics option used. want_expose_statics="yes" AC_MSG_RESULT([yes]) ;; esac if test "$want_expose_statics" = "yes"; then AC_DEFINE_UNQUOTED(CARES_EXPOSE_STATICS, 1, [Defined for build that exposes internal static functions for testing.]) fi ]) dnl CARES_CHECK_OPTION_WARNINGS dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-warnings or --disable-warnings, and set dnl shell variable want_warnings as appropriate. AC_DEFUN([CARES_CHECK_OPTION_WARNINGS], [ AC_REQUIRE([CARES_CHECK_OPTION_DEBUG])dnl AC_BEFORE([$0],[CARES_CHECK_OPTION_WERROR])dnl AC_BEFORE([$0],[XC_CHECK_PROG_CC])dnl AC_MSG_CHECKING([whether to enable strict compiler warnings]) OPT_COMPILER_WARNINGS="default" AC_ARG_ENABLE(warnings, AS_HELP_STRING([--enable-warnings],[Enable strict compiler warnings]) AS_HELP_STRING([--disable-warnings],[Disable strict compiler warnings]), OPT_COMPILER_WARNINGS=$enableval) case "$OPT_COMPILER_WARNINGS" in no) dnl --disable-warnings option used want_warnings="no" ;; default) dnl configure option not specified, so dnl use same setting as --enable-debug want_warnings="$want_debug" ;; *) dnl --enable-warnings option used want_warnings="yes" ;; esac AC_MSG_RESULT([$want_warnings]) ]) dnl CARES_CHECK_OPTION_WERROR dnl ------------------------------------------------- dnl Verify if configure has been invoked with option dnl --enable-werror or --disable-werror, and set dnl shell variable want_werror as appropriate. AC_DEFUN([CARES_CHECK_OPTION_WERROR], [ AC_BEFORE([$0],[CARES_CHECK_COMPILER])dnl AC_MSG_CHECKING([whether to enable compiler warnings as errors]) OPT_COMPILER_WERROR="default" AC_ARG_ENABLE(werror, AS_HELP_STRING([--enable-werror],[Enable compiler warnings as errors]) AS_HELP_STRING([--disable-werror],[Disable compiler warnings as errors]), OPT_COMPILER_WERROR=$enableval) case "$OPT_COMPILER_WERROR" in no) dnl --disable-werror option used want_werror="no" ;; default) dnl configure option not specified want_werror="no" ;; *) dnl --enable-werror option used want_werror="yes" ;; esac AC_MSG_RESULT([$want_werror]) ]) dnl CARES_CHECK_NONBLOCKING_SOCKET dnl ------------------------------------------------- dnl Check for how to set a socket into non-blocking state. AC_DEFUN([CARES_CHECK_NONBLOCKING_SOCKET], [ AC_REQUIRE([CARES_CHECK_OPTION_NONBLOCKING])dnl AC_REQUIRE([CARES_CHECK_FUNC_FCNTL])dnl AC_REQUIRE([CARES_CHECK_FUNC_IOCTL])dnl AC_REQUIRE([CARES_CHECK_FUNC_IOCTLSOCKET])dnl AC_REQUIRE([CARES_CHECK_FUNC_IOCTLSOCKET_CAMEL])dnl AC_REQUIRE([CARES_CHECK_FUNC_SETSOCKOPT])dnl # tst_method="unknown" if test "$want_nonblocking" = "yes"; then AC_MSG_CHECKING([how to set a socket into non-blocking mode]) if test "x$ac_cv_func_fcntl_o_nonblock" = "xyes"; then tst_method="fcntl O_NONBLOCK" elif test "x$ac_cv_func_ioctl_fionbio" = "xyes"; then tst_method="ioctl FIONBIO" elif test "x$ac_cv_func_ioctlsocket_fionbio" = "xyes"; then tst_method="ioctlsocket FIONBIO" elif test "x$ac_cv_func_ioctlsocket_camel_fionbio" = "xyes"; then tst_method="IoctlSocket FIONBIO" elif test "x$ac_cv_func_setsockopt_so_nonblock" = "xyes"; then tst_method="setsockopt SO_NONBLOCK" fi AC_MSG_RESULT([$tst_method]) if test "$tst_method" = "unknown"; then AC_MSG_WARN([cannot determine non-blocking socket method.]) fi fi if test "$tst_method" = "unknown"; then AC_DEFINE_UNQUOTED(USE_BLOCKING_SOCKETS, 1, [Define to disable non-blocking sockets.]) AC_MSG_WARN([non-blocking sockets disabled.]) fi ]) dnl CARES_CONFIGURE_SYMBOL_HIDING dnl ------------------------------------------------- dnl Depending on --enable-symbol-hiding or --disable-symbol-hiding dnl configure option, and compiler capability to actually honor such dnl option, this will modify compiler flags as appropriate and also dnl provide needed definitions for configuration and Makefile.am files. dnl This macro should not be used until all compilation tests have dnl been done to prevent interferences on other tests. AC_DEFUN([CARES_CONFIGURE_SYMBOL_HIDING], [ AC_MSG_CHECKING([whether hiding of library internal symbols will actually happen]) CFLAG_CARES_SYMBOL_HIDING="" doing_symbol_hiding="no" if test x"$ac_cv_native_windows" != "xyes" && test "$want_symbol_hiding" = "yes" && test "$supports_symbol_hiding" = "yes"; then doing_symbol_hiding="yes" CFLAG_CARES_SYMBOL_HIDING="$symbol_hiding_CFLAGS" AC_DEFINE_UNQUOTED(CARES_SYMBOL_SCOPE_EXTERN, $symbol_hiding_EXTERN, [Definition to make a library symbol externally visible.]) AC_MSG_RESULT([yes]) else AC_MSG_RESULT([no]) fi AM_CONDITIONAL(DOING_CARES_SYMBOL_HIDING, test x$doing_symbol_hiding = xyes) AC_SUBST(CFLAG_CARES_SYMBOL_HIDING) if test "$doing_symbol_hiding" = "yes"; then AC_DEFINE_UNQUOTED(CARES_SYMBOL_HIDING, 1, [Defined for build with symbol hiding.]) fi ])