dnl The following are from prerelease autoconf 2.14a. When 2.14 is dnl released, we should be able to zap them and just use AC_PREREQ(2.14). # AC_PROG_CC_STDC # --------------- # If the C compiler in not in ANSI C mode by default, try to add an # option to output variable @code{CC} to make it so. This macro tries # various options that select ANSI C on some system or another. It # considers the compiler to be in ANSI C mode if it handles function # prototypes correctly. AC_DEFUN(AC_PROG_CC_STDC, [AC_REQUIRE([AC_PROG_CC])dnl AC_BEFORE([$0], [AC_C_INLINE])dnl AC_BEFORE([$0], [AC_C_CONST])dnl dnl Force this before AC_PROG_CPP. Some cpp's, eg on HPUX, require dnl a magic option to avoid problems with ANSI preprocessor commands dnl like #elif. dnl FIXME: can't do this because then AC_AIX won't work due to a dnl circular dependency. dnl AC_BEFORE([$0], [AC_PROG_CPP]) AC_MSG_CHECKING(for ${CC-cc} option to accept ANSI C) AC_CACHE_VAL(ac_cv_prog_cc_stdc, [ac_cv_prog_cc_stdc=no ac_save_CC="$CC" # Don't try gcc -ansi; that turns off useful extensions and # breaks some systems' header files. # AIX -qlanglvl=ansi # Ultrix and OSF/1 -std1 # HP-UX 10.20 and later -Ae # HP-UX older versions -Aa -D_HPUX_SOURCE # SVR4 -Xc -D__EXTENSIONS__ for ac_arg in "" -qlanglvl=ansi -std1 -Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__" do CC="$ac_save_CC $ac_arg" AC_TRY_COMPILE( [#include #include #include #include /* Most of the following tests are stolen from RCS 5.7's src/conf.sh. */ struct buf { int x; }; FILE * (*rcsopen) (struct buf *, struct stat *, int); static char *e (p, i) char **p; int i; { return p[i]; } static char *f (char * (*g) (char **, int), char **p, ...) { char *s; va_list v; va_start (v,p); s = g (p, va_arg (v,int)); va_end (v); return s; } int test (int i, double x); struct s1 {int (*f) (int a);}; struct s2 {int (*f) (double a);}; int pairnames (int, char **, FILE *(*)(struct buf *, struct stat *, int), int, int); int argc; char **argv;], [return f (e, argv, 0) != argv[0] || f (e, argv, 1) != argv[1];], [ac_cv_prog_cc_stdc="$ac_arg"; break]) done CC="$ac_save_CC" ]) case "x$ac_cv_prog_cc_stdc" in x|xno) AC_MSG_RESULT([none needed]) ;; *) AC_MSG_RESULT($ac_cv_prog_cc_stdc) CC="$CC $ac_cv_prog_cc_stdc" ;; esac ])# AC_PROG_CC_STDC # AC_FUNC_MKTIME # -------------- AC_DEFUN(AC_FUNC_MKTIME, [AC_REQUIRE([AC_HEADER_TIME])dnl AC_CHECK_HEADERS(sys/time.h unistd.h) AC_CHECK_FUNCS(alarm) AC_CACHE_CHECK([for working mktime], ac_cv_func_working_mktime, [AC_TRY_RUN( [/* Test program from Paul Eggert (eggert@twinsun.com) and Tony Leneis (tony@plaza.ds.adp.com). */ #if TIME_WITH_SYS_TIME # include # include #else # if HAVE_SYS_TIME_H # include # else # include # endif #endif #if HAVE_UNISTD_H # include #endif #if !HAVE_ALARM # define alarm(X) /* empty */ #endif /* Work around redefinition to rpl_putenv by other config tests. */ #undef putenv static time_t time_t_max; /* Values we'll use to set the TZ environment variable. */ static const char *const tz_strings[] = { (const char *) 0, "TZ=GMT0", "TZ=JST-9", "TZ=EST+3EDT+2,M10.1.0/00:00:00,M2.3.0/00:00:00" }; #define N_STRINGS (sizeof (tz_strings) / sizeof (tz_strings[0])) /* Fail if mktime fails to convert a date in the spring-forward gap. Based on a problem report from Andreas Jaeger. */ static void spring_forward_gap () { /* glibc (up to about 1998-10-07) failed this test) */ struct tm tm; /* Use the portable POSIX.1 specification "TZ=PST8PDT,M4.1.0,M10.5.0" instead of "TZ=America/Vancouver" in order to detect the bug even on systems that don't support the Olson extension, or don't have the full zoneinfo tables installed. */ putenv ("TZ=PST8PDT,M4.1.0,M10.5.0"); tm.tm_year = 98; tm.tm_mon = 3; tm.tm_mday = 5; tm.tm_hour = 2; tm.tm_min = 0; tm.tm_sec = 0; tm.tm_isdst = -1; if (mktime (&tm) == (time_t)-1) exit (1); } static void mktime_test (now) time_t now; { struct tm *lt; if ((lt = localtime (&now)) && mktime (lt) != now) exit (1); now = time_t_max - now; if ((lt = localtime (&now)) && mktime (lt) != now) exit (1); } static void irix_6_4_bug () { /* Based on code from Ariel Faigon. */ struct tm tm; tm.tm_year = 96; tm.tm_mon = 3; tm.tm_mday = 0; tm.tm_hour = 0; tm.tm_min = 0; tm.tm_sec = 0; tm.tm_isdst = -1; mktime (&tm); if (tm.tm_mon != 2 || tm.tm_mday != 31) exit (1); } static void bigtime_test (j) int j; { struct tm tm; time_t now; tm.tm_year = tm.tm_mon = tm.tm_mday = tm.tm_hour = tm.tm_min = tm.tm_sec = j; now = mktime (&tm); if (now != (time_t) -1) { struct tm *lt = localtime (&now); if (! (lt && lt->tm_year == tm.tm_year && lt->tm_mon == tm.tm_mon && lt->tm_mday == tm.tm_mday && lt->tm_hour == tm.tm_hour && lt->tm_min == tm.tm_min && lt->tm_sec == tm.tm_sec && lt->tm_yday == tm.tm_yday && lt->tm_wday == tm.tm_wday && ((lt->tm_isdst < 0 ? -1 : 0 < lt->tm_isdst) == (tm.tm_isdst < 0 ? -1 : 0 < tm.tm_isdst)))) exit (1); } } int main () { time_t t, delta; int i, j; /* This test makes some buggy mktime implementations loop. Give up after 60 seconds; a mktime slower than that isn't worth using anyway. */ alarm (60); for (time_t_max = 1; 0 < time_t_max; time_t_max *= 2) continue; time_t_max--; delta = time_t_max / 997; /* a suitable prime number */ for (i = 0; i < N_STRINGS; i++) { if (tz_strings[i]) putenv (tz_strings[i]); for (t = 0; t <= time_t_max - delta; t += delta) mktime_test (t); mktime_test ((time_t) 60 * 60); mktime_test ((time_t) 60 * 60 * 24); for (j = 1; 0 < j; j *= 2) bigtime_test (j); bigtime_test (j - 1); } irix_6_4_bug (); spring_forward_gap (); exit (0); }], ac_cv_func_working_mktime=yes, ac_cv_func_working_mktime=no, ac_cv_func_working_mktime=no)]) if test $ac_cv_func_working_mktime = no; then LIBOBJS="$LIBOBJS mktime.${ac_objext}" fi AC_SUBST(LIBOBJS)dnl ])# AC_FUNC_MKTIME # AC_C_VOLATILE # ------------- # Note that, unlike const, #defining volatile to be the empty string can # actually turn a correct program into an incorrect one, since removing # uses of volatile actually grants the compiler permission to perform # optimizations that could break the user's code. So, do not #define # volatile away unless it is really necessary to allow the user's code # to compile cleanly. Benign compiler failures should be tolerated. AC_DEFUN(AC_C_VOLATILE, [AC_REQUIRE([AC_PROG_CC_STDC])dnl AC_CACHE_CHECK([for working volatile], ac_cv_c_volatile, [AC_TRY_COMPILE(,[ volatile int x; int * volatile y;], ac_cv_c_volatile=yes, ac_cv_c_volatile=no)]) if test $ac_cv_c_volatile = no; then AC_DEFINE(volatile,, [Define to empty if the keyword `volatile' does not work. Warning: valid code using `volatile' can become incorrect without. Disable with care.]) fi ]) # AC_C_PROTOTYPES # --------------- # Check if the C compiler supports prototypes, included if it needs # options. AC_DEFUN(AC_C_PROTOTYPES, [AC_REQUIRE([AC_PROG_CC_STDC])dnl AC_REQUIRE([AC_PROG_CPP])dnl AC_MSG_CHECKING([for function prototypes]) if test "$ac_cv_prog_cc_stdc" != no; then AC_MSG_RESULT(yes) AC_DEFINE(PROTOTYPES, 1, [Define if the compiler supports function prototypes.]) else AC_MSG_RESULT(no) fi ])# AC_C_PROTOTYPES dnl By default, many hosts won't let programs access large files; dnl one must use special compiler options to get large-file access to work. dnl For more details about this brain damage please see: dnl http://www.sas.com/standards/large.file/x_open.20Mar96.html dnl Written by Paul Eggert . dnl Internal subroutine of AC_SYS_LARGEFILE. dnl AC_SYS_LARGEFILE_TEST_INCLUDES AC_DEFUN(AC_SYS_LARGEFILE_TEST_INCLUDES, [[#include int a[(off_t) 9223372036854775807 == 9223372036854775807 ? 1 : -1]; ]]) dnl Internal subroutine of AC_SYS_LARGEFILE. dnl AC_SYS_LARGEFILE_MACRO_VALUE(C-MACRO, VALUE, CACHE-VAR, COMMENT, INCLUDES, FUNCTION-BODY) AC_DEFUN(AC_SYS_LARGEFILE_MACRO_VALUE, [AC_CACHE_CHECK([for $1 value needed for large files], $3, [$3=no AC_TRY_COMPILE(AC_SYS_LARGEFILE_TEST_INCLUDES $5 , [$6], , [AC_TRY_COMPILE([#define $1 $2] AC_SYS_LARGEFILE_TEST_INCLUDES $5 , [$6], [$3=$2])])]) if test "[$]$3" != no; then AC_DEFINE_UNQUOTED([$1], [$]$3, [$4]) fi]) AC_DEFUN(AC_SYS_LARGEFILE, [AC_ARG_ENABLE(largefile, [ --disable-largefile omit support for large files]) if test "$enable_largefile" != no; then AC_CACHE_CHECK([for special C compiler options needed for large files], ac_cv_sys_largefile_CC, [ac_cv_sys_largefile_CC=no if test "$GCC" != yes; then # IRIX 6.2 and later do not support large files by default, # so use the C compiler's -n32 option if that helps. AC_TRY_COMPILE(AC_SYS_LARGEFILE_TEST_INCLUDES, , , [ac_save_CC="$CC" CC="$CC -n32" AC_TRY_COMPILE(AC_SYS_LARGEFILE_TEST_INCLUDES, , ac_cv_sys_largefile_CC=' -n32') CC="$ac_save_CC"]) fi]) if test "$ac_cv_sys_largefile_CC" != no; then CC="$CC$ac_cv_sys_largefile_CC" fi AC_SYS_LARGEFILE_MACRO_VALUE(_FILE_OFFSET_BITS, 64, ac_cv_sys_file_offset_bits, [Number of bits in a file offset, on hosts where this is settable.]) AC_SYS_LARGEFILE_MACRO_VALUE(_LARGEFILE_SOURCE, 1, ac_cv_sys_largefile_source, [Define to make ftello visible on some hosts (e.g. HP-UX 10.20).], [#include ], [return !ftello;]) AC_SYS_LARGEFILE_MACRO_VALUE(_LARGE_FILES, 1, ac_cv_sys_large_files, [Define for large files, on AIX-style hosts.]) AC_SYS_LARGEFILE_MACRO_VALUE(_XOPEN_SOURCE, 500, ac_cv_sys_xopen_source, [Define to make ftello visible on some hosts (e.g. glibc 2.1.3).], [#include ], [return !ftello;]) fi ])