+++ /dev/null
-# AC_PROG_CC_C99 ([ACTION-IF-AVAILABLE], [ACTION-IF-UNAVAILABLE])
-# ----------------------------------------------------------------
-# If the C compiler is not in ISO C99 mode by default, try to add an
-# option to output variable CC to make it so. This macro tries
-# various options that select ISO C99 on some system or another. It
-# considers the compiler to be in ISO C99 mode if it handles _Bool,
-# // comments, flexible array members, inline, long long int, mixed
-# code and declarations, named initialization of structs, restrict,
-# va_copy, varargs macros, variable declarations in for loops and
-# variable length arrays.
-AC_DEFUN([AC_PROG_CC_C99],
-[AC_C_STD_TRY([c99],
-[[#include <stdarg.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <wchar.h>
-#include <stdio.h>
-
-// Check varargs macros. These examples are taken from C99 6.10.3.5.
-#define debug(...) fprintf (stderr, __VA_ARGS__)
-#define showlist(...) puts (#__VA_ARGS__)
-#define report(test,...) ((test) ? puts (#test) : printf (__VA_ARGS__))
-static void
-test_varargs_macros (void)
-{
- int x = 1234;
- int y = 5678;
- debug ("Flag");
- debug ("X = %d\n", x);
- showlist (The first, second, and third items.);
- report (x>y, "x is %d but y is %d", x, y);
-}
-
-// Check long long types.
-#define BIG64 18446744073709551615ull
-#define BIG32 4294967295ul
-#define BIG_OK (BIG64 / BIG32 == 4294967297ull && BIG64 % BIG32 == 0)
-#if !BIG_OK
- your preprocessor is broken;
-#endif
-#if BIG_OK
-#else
- your preprocessor is broken;
-#endif
-static long long int bignum = -9223372036854775807LL;
-static unsigned long long int ubignum = BIG64;
-
-struct incomplete_array
-{
- int datasize;
- double data[];
-};
-
-struct named_init {
- int number;
- const wchar_t *name;
- double average;
-};
-
-typedef const char *ccp;
-
-static inline int
-test_restrict (ccp restrict text)
-{
- // See if C++-style comments work.
- // Iterate through items via the restricted pointer.
- // Also check for declarations in for loops.
- for (unsigned int i = 0; *(text+i) != '\0'; ++i)
- continue;
- return 0;
-}
-
-// Check varargs and va_copy.
-static void
-test_varargs (const char *format, ...)
-{
- va_list args;
- va_start (args, format);
- va_list args_copy;
- va_copy (args_copy, args);
-
- const char *str;
- int number;
- float fnumber;
-
- while (*format)
- {
- switch (*format++)
- {
- case 's': // string
- str = va_arg (args_copy, const char *);
- break;
- case 'd': // int
- number = va_arg (args_copy, int);
- break;
- case 'f': // float
- fnumber = va_arg (args_copy, double);
- break;
- default:
- break;
- }
- }
- va_end (args_copy);
- va_end (args);
-}
-]],
-[[
- // Check bool.
- _Bool success = false;
-
- // Check restrict.
- if (test_restrict ("String literal") == 0)
- success = true;
- char *restrict newvar = "Another string";
-
- // Check varargs.
- test_varargs ("s, d' f .", "string", 65, 34.234);
- test_varargs_macros ();
-
- // Check flexible array members.
- struct incomplete_array *ia =
- malloc (sizeof (struct incomplete_array) + (sizeof (double) * 10));
- ia->datasize = 10;
- for (int i = 0; i < ia->datasize; ++i)
- ia->data[i] = i * 1.234;
-
- // Check named initializers.
- struct named_init ni = {
- .number = 34,
- .name = L"Test wide string",
- .average = 543.34343,
- };
-
- ni.number = 58;
-
- int dynamic_array[ni.number];
- dynamic_array[ni.number - 1] = 543;
-
- // work around unused variable warnings
- return (!success || bignum == 0LL || ubignum == 0uLL || newvar[0] == 'x'
- || dynamic_array[ni.number - 1] != 543);
-]],
-dnl Try
-dnl GCC -std=gnu99 (unused restrictive modes: -std=c99 -std=iso9899:1999)
-dnl AIX -qlanglvl=extc99 (unused restrictive mode: -qlanglvl=stdc99)
-dnl Intel ICC -c99
-dnl IRIX -c99
-dnl Solaris (unused because it causes the compiler to assume C99 semantics for
-dnl library functions, and this is invalid before Solaris 10: -xc99)
-dnl Tru64 -c99
-dnl with extended modes being tried first.
-[[-std=gnu99 -c99 -qlanglvl=extc99]], [$1], [$2])[]dnl
-])# AC_PROG_CC_C99
-
-# AC_C_STD_TRY(STANDARD, TEST-PROLOGUE, TEST-BODY, OPTION-LIST,
-# ACTION-IF-AVAILABLE, ACTION-IF-UNAVAILABLE)
-# --------------------------------------------------------------
-# Check whether the C compiler accepts features of STANDARD (e.g `c89', `c99')
-# by trying to compile a program of TEST-PROLOGUE and TEST-BODY. If this fails,
-# try again with each compiler option in the space-separated OPTION-LIST; if one
-# helps, append it to CC. If eventually successful, run ACTION-IF-AVAILABLE,
-# else ACTION-IF-UNAVAILABLE.
-AC_DEFUN([AC_C_STD_TRY],
-[AC_MSG_CHECKING([for $CC option to accept ISO ]m4_translit($1, [c], [C]))
-AC_CACHE_VAL(ac_cv_prog_cc_$1,
-[ac_cv_prog_cc_$1=no
-ac_save_CC=$CC
-AC_LANG_CONFTEST([AC_LANG_PROGRAM([$2], [$3])])
-for ac_arg in '' $4
-do
- CC="$ac_save_CC $ac_arg"
- _AC_COMPILE_IFELSE([], [ac_cv_prog_cc_$1=$ac_arg])
- test "x$ac_cv_prog_cc_$1" != "xno" && break
-done
-rm -f conftest.$ac_ext
-CC=$ac_save_CC
-])# AC_CACHE_VAL
-case "x$ac_cv_prog_cc_$1" in
- x)
- AC_MSG_RESULT([none needed]) ;;
- xno)
- AC_MSG_RESULT([unsupported]) ;;
- *)
- CC="$CC $ac_cv_prog_cc_$1"
- AC_MSG_RESULT([$ac_cv_prog_cc_$1]) ;;
-esac
-AS_IF([test "x$ac_cv_prog_cc_$1" != xno], [$5], [$6])
-])# AC_C_STD_TRY
projects / awesomized / libmemcached / blobdiff