#These defines are needed because CentOS5 uses a old version of autoconf # AC_DEFUN([AC_TYPE_INT8_T], [_AC_TYPE_INT(8)]) AC_DEFUN([AC_TYPE_INT16_T], [_AC_TYPE_INT(16)]) AC_DEFUN([AC_TYPE_INT32_T], [_AC_TYPE_INT(32)]) AC_DEFUN([AC_TYPE_INT64_T], [_AC_TYPE_INT(64)]) AC_DEFUN([AC_TYPE_UINT8_T], [_AC_TYPE_UNSIGNED_INT(8)]) AC_DEFUN([AC_TYPE_UINT16_T], [_AC_TYPE_UNSIGNED_INT(16)]) AC_DEFUN([AC_TYPE_UINT32_T], [_AC_TYPE_UNSIGNED_INT(32)]) AC_DEFUN([AC_TYPE_UINT64_T], [_AC_TYPE_UNSIGNED_INT(64)]) # _AC_TYPE_INT(NBITS) # ------------------- AC_DEFUN([_AC_TYPE_INT], [ AC_CACHE_CHECK([for int$1_t], [ac_cv_c_int$1_t], [ac_cv_c_int$1_t=no for ac_type in 'int$1_t' 'int' 'long int' \ 'long long int' 'short int' 'signed char'; do AC_COMPILE_IFELSE( [AC_LANG_BOOL_COMPILE_TRY( [AC_INCLUDES_DEFAULT], [[0 < ($ac_type) (((($ac_type) 1 << ($1 - 2)) - 1) * 2 + 1)]])], [AC_COMPILE_IFELSE( [AC_LANG_BOOL_COMPILE_TRY( [AC_INCLUDES_DEFAULT], [[($ac_type) (((($ac_type) 1 << ($1 - 2)) - 1) * 2 + 1) < ($ac_type) (((($ac_type) 1 << ($1 - 2)) - 1) * 2 + 2)]])], [], [AS_CASE([$ac_type], [int$1_t], [ac_cv_c_int$1_t=yes], [ac_cv_c_int$1_t=$ac_type])])]) test "$ac_cv_c_int$1_t" != no && break done]) case $ac_cv_c_int$1_t in #( no|yes) ;; #( *) AC_DEFINE_UNQUOTED([int$1_t], [$ac_cv_c_int$1_t], [Define to the type of a signed integer type of width exactly $1 bits if such a type exists and the standard includes do not define it.]);; esac ])# _AC_TYPE_INT # _AC_TYPE_UNSIGNED_INT(NBITS) # ---------------------------- AC_DEFUN([_AC_TYPE_UNSIGNED_INT], [ AC_CACHE_CHECK([for uint$1_t], [ac_cv_c_uint$1_t], [ac_cv_c_uint$1_t=no for ac_type in 'uint$1_t' 'unsigned int' 'unsigned long int' \ 'unsigned long long int' 'unsigned short int' 'unsigned char'; do AC_COMPILE_IFELSE( [AC_LANG_BOOL_COMPILE_TRY( [AC_INCLUDES_DEFAULT], [[($ac_type) -1 >> ($1 - 1) == 1]])], [AS_CASE([$ac_type], [uint$1_t], [ac_cv_c_uint$1_t=yes], [ac_cv_c_uint$1_t=$ac_type])]) test "$ac_cv_c_uint$1_t" != no && break done]) case $ac_cv_c_uint$1_t in #( no|yes) ;; #( *) m4_bmatch([$1], [^\(8\|32\|64\)$], [AC_DEFINE([_UINT$1_T], 1, [Define for Solaris 2.5.1 so the uint$1_t typedef from , , or is not used. If the typedef was allowed, the #define below would cause a syntax error.])]) AC_DEFINE_UNQUOTED([uint$1_t], [$ac_cv_c_uint$1_t], [Define to the type of an unsigned integer type of width exactly $1 bits if such a type exists and the standard includes do not define it.]);; esac ])# _AC_TYPE_UNSIGNED_INT # AS_CASE(WORD, [PATTERN1], [IF-MATCHED1]...[DEFAULT]) # ---------------------------------------------------- # Expand into # | case WORD in # | PATTERN1) IF-MATCHED1 ;; # | ... # | *) DEFAULT ;; # | esac m4_define([_AS_CASE], [m4_if([$#], 0, [m4_fatal([$0: too few arguments: $#])], [$#], 1, [ *) $1 ;;], [$#], 2, [ $1) m4_default([$2], [:]) ;;], [ $1) m4_default([$2], [:]) ;; $0(m4_shiftn(2, $@))])dnl ]) m4_defun([AS_CASE], [m4_ifval([$2$3], [case $1 in _AS_CASE(m4_shift($@)) esac ])dnl ])# AS_CASE # _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 #include #include #include #include // 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 HP cc -AC99 dnl Intel ICC -std=c99, -c99 (deprecated) dnl IRIX -c99 dnl Solaris -xc99=all (Forte Developer 7 C mishandles -xc99 on Solaris 9, dnl as it incorrectly assumes C99 semantics for library functions) dnl Tru64 -c99 dnl with extended modes being tried first. [[-std=gnu99 -std=c99 -c99 -AC99 -xc99=all -qlanglvl=extc99]], [$1], [$2])[]dnl ])# _AC_PROG_CC_C99 # AC_PROG_CC_C89 # -------------- AC_DEFUN([AC_PROG_CC_C89], [ AC_REQUIRE([AC_PROG_CC])dnl _AC_PROG_CC_C89 ]) # AC_PROG_CC_C99 # -------------- AC_DEFUN([AC_PROG_CC_C99], [ AC_REQUIRE([AC_PROG_CC])dnl _AC_PROG_CC_C99 ]) # AC_PROG_CC_STDC # --------------- AC_DEFUN([AC_PROG_CC_STDC], [ AC_REQUIRE([AC_PROG_CC])dnl AS_CASE([$ac_cv_prog_cc_stdc], [no], [ac_cv_prog_cc_c99=no; ac_cv_prog_cc_c89=no], [_AC_PROG_CC_C99([ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c99], [_AC_PROG_CC_C89([ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c89], [ac_cv_prog_cc_stdc=no])])])dnl AC_MSG_CHECKING([for $CC option to accept ISO Standard C]) AC_CACHE_VAL([ac_cv_prog_cc_stdc], []) AS_CASE([$ac_cv_prog_cc_stdc], [no], [AC_MSG_RESULT([unsupported])], [''], [AC_MSG_RESULT([none needed])], [AC_MSG_RESULT([$ac_cv_prog_cc_stdc])]) ]) # _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