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c193752ca4
* The autoconf-archive package contains macros useful for detecting C++ standard and testing other C++ capabilities but that package was never included in the install_prereq script so many existing build environments won't have it. Even if it is installed, older versions won't newer C++ standards and will actually cause an error if you try to test for that version. To make it available for those environments, the ax_cxx_compile_stdcxx.m4 macro has copied from the latest release of autoconf-archive into the autoconf directory. * A convenience wrapper(ast_cxx_check_std) around ax_cxx_compile_stdcxx was also added so checking the standard version and setting the asterisk-specific PBX_ variables becomes a one-liner: `AST_CXX_CHECK_STD([std], [force_latest_std])`. Calling that with a version of `17` for instance, will set PBX_CXX17 to 0 or 1 depending on whether the current c++ compiler supports stdc++17. HAVE_CXX17 will also be 'defined" or not depending on the result. * C++ compilers hardly ever default to the latest standard they support. g++ version 14 for instance supports up to C++23 but only uses C++17 by default. If you want to use C++23, you have to add `-std=gnu++=23` to the g++ command line. If you set the second argument of AST_CXX_CHECK_STD to "yes", the macro will automatically keep the highest `-std=gnu++` value that worked and pass that to the Makefiles. * The autoconf-archive package was added to install_prereq for future use. * Updated configure.ac to use AST_CXX_CHECK_STD() to check for C++ versions 11, 14, 17, 20 and 23. * Updated configure.ac to accept the `--enable-latest-cxx-std` option which will set the second option to AST_CXX_CHECK_STD() to "yes". The default is "no". * ast_copy_string() in strings.h declares the 'sz' variable as volatile and does an `sz--` on it later. C++20 no longer allows the `++` and `--` increment and decrement operators to be used on variables declared as volatile however so that was changed to `sz -= 1`.
123 lines
3.2 KiB
C
123 lines
3.2 KiB
C
/* autoconfig.h.in. Generated from configure.ac by autoheader. */
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#ifndef MENUSELECT_AUTOCONFIG_H
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#define MENUSELECT_AUTOCONFIG_H
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/* Define to 1 if using 'alloca.c'. */
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#undef C_ALLOCA
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/* Define to 1 if you have 'alloca', as a function or macro. */
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#undef HAVE_ALLOCA
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/* Define to 1 if <alloca.h> works. */
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#undef HAVE_ALLOCA_H
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/* Define to 1 if you have the 'asprintf' function. */
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#undef HAVE_ASPRINTF
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/* Define to 1 if you have the curses library. */
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#undef HAVE_CURSES
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/* Define to 1 if you have the 'getloadavg' function. */
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#undef HAVE_GETLOADAVG
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/* Define if your system has the GTK2 libraries. */
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#undef HAVE_GTK2
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/* Define to 1 if you have the <inttypes.h> header file. */
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#undef HAVE_INTTYPES_H
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/* Define if your system has the LIBXML2 libraries. */
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#undef HAVE_LIBXML2
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/* Define to 1 if you have the ncurses library. */
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#undef HAVE_NCURSES
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/* Define to 1 if you have the newt library. */
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#undef HAVE_NEWT
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/* Define to 1 if you have the 'setenv' function. */
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#undef HAVE_SETENV
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/* Define to 1 if you have the <stdint.h> header file. */
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#undef HAVE_STDINT_H
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/* Define to 1 if you have the <stdio.h> header file. */
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#undef HAVE_STDIO_H
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/* Define to 1 if you have the <stdlib.h> header file. */
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#undef HAVE_STDLIB_H
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/* Define to 1 if you have the 'strcasestr' function. */
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#undef HAVE_STRCASESTR
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/* Define to 1 if you have the <strings.h> header file. */
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#undef HAVE_STRINGS_H
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/* Define to 1 if you have the <string.h> header file. */
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#undef HAVE_STRING_H
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/* Define to 1 if you have the 'strndup' function. */
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#undef HAVE_STRNDUP
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/* Define to 1 if you have the 'strnlen' function. */
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#undef HAVE_STRNLEN
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/* Define to 1 if you have the 'strsep' function. */
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#undef HAVE_STRSEP
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/* Define to 1 if you have the <sys/stat.h> header file. */
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#undef HAVE_SYS_STAT_H
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/* Define to 1 if you have the <sys/types.h> header file. */
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#undef HAVE_SYS_TYPES_H
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/* Define to 1 if you have the terminfo library. */
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#undef HAVE_TINFO
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/* Define to 1 if you have the <unistd.h> header file. */
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#undef HAVE_UNISTD_H
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/* Define to 1 if you have the 'unsetenv' function. */
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#undef HAVE_UNSETENV
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/* Define to 1 if you have the 'vasprintf' function. */
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#undef HAVE_VASPRINTF
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/* Define to the address where bug reports for this package should be sent. */
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#undef PACKAGE_BUGREPORT
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/* Define to the full name of this package. */
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#undef PACKAGE_NAME
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/* Define to the full name and version of this package. */
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#undef PACKAGE_STRING
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/* Define to the one symbol short name of this package. */
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#undef PACKAGE_TARNAME
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/* Define to the home page for this package. */
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#undef PACKAGE_URL
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/* Define to the version of this package. */
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#undef PACKAGE_VERSION
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/* If using the C implementation of alloca, define if you know the
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direction of stack growth for your system; otherwise it will be
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automatically deduced at runtime.
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STACK_DIRECTION > 0 => grows toward higher addresses
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STACK_DIRECTION < 0 => grows toward lower addresses
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STACK_DIRECTION = 0 => direction of growth unknown */
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#undef STACK_DIRECTION
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/* Define to 1 if all of the C89 standard headers exist (not just the ones
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required in a freestanding environment). This macro is provided for
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backward compatibility; new code need not use it. */
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#undef STDC_HEADERS
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/* Define as 'unsigned int' if <stddef.h> doesn't define. */
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#undef size_t
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#endif
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