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* NEWS: AC_PROG_CC and AC_PROG_CXX no longer declare 'exit'.

Browse Source 
* doc/autoconf.texi (Function Portability): Mention that C++
has trouble with 'exit'.
(Guidelines): Test programs shouldn't use 'exit'.
* lib/autoconf/c.m4 (_AC_PROG_CXX_EXIT_DECLARATION):
Remove; all uses removed.
(AC_LANG_INT_SAVE(C), AC_C_BIGENDIAN):
Return from 'main' instead of calling 'exit'.
* lib/autoconf/functions.m4 (_AC_LIBOBJ_ALLOCA, AC_FUNC_CLOSEDIR_VOID):
(_AC_FUNC_FNMATCH_IF, AC_FUNC_GETGROUPS):
(AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK, _AC_FUNC_MALLOC_IF):
(AC_FUNC_MEMCMP, AC_FUNC_MKTIME, AC_FUNC_MMAP, _AC_FUNC_REALLOC_IF):
(AC_FUNC_SETPGRP, _AC_FUNC_STAT, AC_FUNC_STRTOD, AC_FUNC_STRERROR_R):
(AC_FUNC_STRNLEN, AC_FUNC_SETVBUF_REVERSED, AC_FUNC_UTIME_NULL):
(_AC_FUNC_FORK, _AC_FUNC_VFORK, AC_FUNC_WAIT3): Likewise.
* lib/autoconf/headers.m4 (AC_HEADER_STDC): Likewise.
* lib/autoconf/specific.m4 (AC_SYS_RESTARTABLE_SYSCALLS): Likewise.
* lib/autoconf/types.m4 (AC_TYPE_GETGROUPS): Likewise.
* tests/compile.at: Likewsie.
This commit is contained in:
Paul Eggert 2006-04-03 03:18:39 +00:00
parent 867693d0f9
commit a71c24a704
9 changed files with 129 additions and 144 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
ChangeLog
View File

@ -1,3 +1,25 @@
2006-04-02 Paul Eggert <eggert@cs.ucla.edu>
* NEWS: AC_PROG_CC and AC_PROG_CXX no longer declare 'exit'.
* doc/autoconf.texi (Function Portability): Mention that C++
has trouble with 'exit'.
(Guidelines): Test programs shouldn't use 'exit'.
* lib/autoconf/c.m4 (_AC_PROG_CXX_EXIT_DECLARATION):
Remove; all uses removed.
(AC_LANG_INT_SAVE(C), AC_C_BIGENDIAN):
Return from 'main' instead of calling 'exit'.
* lib/autoconf/functions.m4 (_AC_LIBOBJ_ALLOCA, AC_FUNC_CLOSEDIR_VOID):
(_AC_FUNC_FNMATCH_IF, AC_FUNC_GETGROUPS):
(AC_FUNC_LSTAT_FOLLOWS_SLASHED_SYMLINK, _AC_FUNC_MALLOC_IF):
(AC_FUNC_MEMCMP, AC_FUNC_MKTIME, AC_FUNC_MMAP, _AC_FUNC_REALLOC_IF):
(AC_FUNC_SETPGRP, _AC_FUNC_STAT, AC_FUNC_STRTOD, AC_FUNC_STRERROR_R):
(AC_FUNC_STRNLEN, AC_FUNC_SETVBUF_REVERSED, AC_FUNC_UTIME_NULL):
(_AC_FUNC_FORK, _AC_FUNC_VFORK, AC_FUNC_WAIT3): Likewise.
* lib/autoconf/headers.m4 (AC_HEADER_STDC): Likewise.
* lib/autoconf/specific.m4 (AC_SYS_RESTARTABLE_SYSCALLS): Likewise.
* lib/autoconf/types.m4 (AC_TYPE_GETGROUPS): Likewise.
* tests/compile.at: Likewsie.
2006-04-02 Stepan Kasal <kasal@ucw.cz>
* lib/autoconf/c.m4 (AC_PROG_CC, AC_PROG_CXX, AC_PROG_OBJC): Call

7
NEWS
View File

@ -39,6 +39,13 @@
Now checks for X11/Xlib.h and XrmInitialize (X proper) rather than
X11/Intrinsic.h and XtMalloc (Xt).
** AC_PROG_CC, AC_PROG_CXX
No longer automatically arrange to declare the 'exit' function of C,
when a C++ compiler is used. Standard Autoconf macros no longer use
'exit', so this is no longer an issue for them. If you use C++, and
want to call 'exit', you'll have to arrange for its declaration
yourself. But we now suggest you return from 'main' instead.
** AC_PROG_CC_C89, AC_PROG_CC_C99
New macros for ISO C99 support. AC_PROG_CC_C89 and AC_PROG_CC_C99
check for ANSI C89 and ISO C99 support respectively.

15
doc/autoconf.texi
View File

@ -3838,10 +3838,15 @@ additions. Please help us keeping it as complete as possible.
@item @code{exit}
@c @fuindex exit
@prindex @code{exit}
Did you know that, on some older hosts, @code{exit} returns @code{int}?
On ancient hosts, @code{exit} returned @code{int}.
This is because @code{exit} predates @code{void}, and there was a long
tradition of it returning @code{int}.
On more-modern hosts, the problem more likely is that @code{exit} is not
declared, due to C++ problems of some sort or another. For this reason
we suggest that test programs not invoke @code{exit}, but return from
@code{main} instead.
@item @code{free}
@c @fuindex free
@prindex @code{free}
@ -6599,7 +6604,7 @@ environment variable) on a trivial @file{Imakefile} and examining the
will disable this method.
If this method fails to find the X Window System, @command{configure}
will look for the files in several directories where they often reside.
will look for the files in several directories where they often reside.
If either method is successful, set the shell variables
@code{x_includes} and @code{x_libraries} to their locations, unless they
are in directories the compiler searches by default.
@ -7002,9 +7007,9 @@ Test programs should not write anything to the standard output. They
should return 0 if the test succeeds, nonzero otherwise, so that success
can be distinguished easily from a core dump or other failure;
segmentation violations and other failures produce a nonzero exit
status. Test programs should @code{exit}, not @code{return}, from
@code{main}, because on some systems (old Suns, at least) the argument
to @code{return} in @code{main} is ignored.
status. Test programs should @code{return}, not @code{exit}, from
@code{main}, because on some systems (notably C++ compilers masquerading
as C compilers) @code{exit} is not declared.
Test programs can use @code{#if} or @code{#ifdef} to check the values of
preprocessor macros defined by tests that have already run. For

56
lib/autoconf/c.m4
View File

@ -278,22 +278,22 @@ static unsigned long int ulongval () { return $2; }
[
FILE *f = fopen ("conftest.val", "w");
if (! f)
exit (1);
return 1;
if (($2) < 0)
{
long int i = longval ();
if (i != ($2))
exit (1);
return 1;
fprintf (f, "%ld\n", i);
}
else
{
unsigned long int i = ulongval ();
if (i != ($2))
exit (1);
return 1;
fprintf (f, "%lu\n", i);
}
exit (ferror (f) || fclose (f) != 0);
return ferror (f) || fclose (f) != 0;
])])
@ -552,14 +552,6 @@ _AC_LANG_COMPILER_GNU
GCC=`test $ac_compiler_gnu = yes && echo yes`
_AC_PROG_CC_G
_AC_PROG_CC_C89
# Some people use a C++ compiler to compile C. Since we use `exit',
# in C++ we need to declare it. In case someone uses the same compiler
# for both compiling C and C++ we need to have the C++ compiler decide
# the declaration of exit, since it's the most demanding environment.
_AC_COMPILE_IFELSE([@%:@ifndef __cplusplus
choke me
@%:@endif],
[_AC_PROG_CXX_EXIT_DECLARATION])
AC_LANG_POP(C)dnl
])# AC_PROG_CC
@ -786,7 +778,6 @@ _AC_COMPILER_EXEEXT
_AC_LANG_COMPILER_GNU
GXX=`test $ac_compiler_gnu = yes && echo yes`
_AC_PROG_CXX_G
_AC_PROG_CXX_EXIT_DECLARATION
AC_LANG_POP(C++)dnl
])# AC_PROG_CXX
@ -833,43 +824,6 @@ fi[]dnl
])# _AC_PROG_CXX_G
# _AC_PROG_CXX_EXIT_DECLARATION
# -----------------------------
# If <stdlib.h> doesn't already provide a valid prototype for exit,
# determine the appropriate prototype and put it in confdefs.h.
# This macro is run only when testing a C++ compiler, but it generates
# a prototype that is also appropriate for C compilers in order to
# support a mixed C/C++ configuration environment.
# We don't need to worry about this for C, since we include <stdlib.h>
# if it is available, and that method works for all C compilers.
m4_define([_AC_PROG_CXX_EXIT_DECLARATION],
[for ac_declaration in \
'' \
'extern "C" void std::exit (int) throw (); using std::exit;' \
'extern "C" void std::exit (int); using std::exit;' \
'extern "C" void exit (int) throw ();' \
'extern "C" void exit (int);' \
'extern "C" __declspec(dllimport) void exit (int);' \
'void exit (int);'
do
_AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$ac_declaration
@%:@include <stdlib.h>],
[exit (42);])],
[],
[continue])
_AC_COMPILE_IFELSE([AC_LANG_PROGRAM([$ac_declaration],
[exit (42);])],
[break])
done
rm -f conftest*
if test -n "$ac_declaration"; then
echo '#ifdef __cplusplus' >>confdefs.h
echo $ac_declaration >>confdefs.h
echo '#endif' >>confdefs.h
fi
])# _AC_PROG_CXX_EXIT_DECLARATION
# ------------------------------ #
# 3d. The Objective C compiler. #
# ------------------------------ #
@ -1381,7 +1335,7 @@ AC_RUN_IFELSE(
char c[sizeof (long int)];
} u;
u.l = 1;
exit (u.c[sizeof (long int) - 1] == 1);
return u.c[sizeof (long int) - 1] == 1;
]])],
[ac_cv_c_bigendian=no],
[ac_cv_c_bigendian=yes],

147
lib/autoconf/functions.m4
View File

@ -298,7 +298,7 @@ find_stack_direction ()
int
main ()
{
exit (find_stack_direction () < 0);
return find_stack_direction () < 0;
}])],
[ac_cv_c_stack_direction=1],
[ac_cv_c_stack_direction=-1],
@ -389,15 +389,14 @@ AC_CACHE_CHECK([for working chown], ac_cv_func_chown_works,
struct stat before, after;
if (creat (f, 0600) < 0)
exit (1);
return 1;
if (stat (f, &before) < 0)
exit (1);
return 1;
if (chown (f, (uid_t) -1, (gid_t) -1) == -1)
exit (1);
return 1;
if (stat (f, &after) < 0)
exit (1);
exit ((before.st_uid == after.st_uid
&& before.st_gid == after.st_gid) ? 0 : 1);
return 1;
return ! (before.st_uid == after.st_uid && before.st_gid == after.st_gid);
]])],
[ac_cv_func_chown_works=yes],
[ac_cv_func_chown_works=no],
@ -426,7 +425,7 @@ AC_CACHE_CHECK([whether closedir returns void],
int closedir ();
#endif
],
[[exit (closedir (opendir (".")) != 0);]])],
[[return closedir (opendir (".")) != 0;]])],
[ac_cv_func_closedir_void=no],
[ac_cv_func_closedir_void=yes],
[ac_cv_func_closedir_void=yes])])
@ -478,7 +477,7 @@ AC_DEFUN([_AC_FUNC_FNMATCH_IF],
# define y(a, b, c) (fnmatch (a, b, c) == 0)
# define n(a, b, c) (fnmatch (a, b, c) == FNM_NOMATCH)
],
[exit
[return
(!(y ("a*", "abc", 0)
&& n ("d*/*1", "d/s/1", FNM_PATHNAME)
&& y ("a\\\\bc", "abc", 0)
@ -602,7 +601,7 @@ if test $ac_cv_func_getgroups = yes; then
AC_CACHE_CHECK([for working getgroups], ac_cv_func_getgroups_works,
[AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
[[/* On Ultrix 4.3, getgroups (0, 0) always fails. */
exit (getgroups (0, 0) == -1 ? 1 : 0);]])],
return getgroups (0, 0) == -1;]])],
[ac_cv_func_getgroups_works=yes],
[ac_cv_func_getgroups_works=no],
[ac_cv_func_getgroups_works=no])
@ -815,7 +814,7 @@ if test "$as_ln_s" = "ln -s" && ln -s conftest.file conftest.sym; then
/* Linux will dereference the symlink and fail.
That is better in the sense that it means we will not
have to compile and use the lstat wrapper. */
exit (lstat ("conftest.sym/", &sbuf) ? 0 : 1);])],
return lstat ("conftest.sym/", &sbuf) != 0;])],
[ac_cv_func_lstat_dereferences_slashed_symlink=yes],
[ac_cv_func_lstat_dereferences_slashed_symlink=no],
[ac_cv_func_lstat_dereferences_slashed_symlink=no])
@ -853,7 +852,7 @@ AC_CACHE_CHECK([for GNU libc compatible malloc], ac_cv_func_malloc_0_nonnull,
char *malloc ();
#endif
]],
[exit (malloc (0) ? 0 : 1);])],
[return ! malloc (0);])],
[ac_cv_func_malloc_0_nonnull=yes],
[ac_cv_func_malloc_0_nonnull=no],
[ac_cv_func_malloc_0_nonnull=no])])
@ -911,7 +910,7 @@ AC_DEFUN([AC_FUNC_MEMCMP],
/* Some versions of memcmp are not 8-bit clean. */
char c0 = '\100', c1 = '\200', c2 = '\201';
if (memcmp(&c0, &c2, 1) >= 0 || memcmp(&c1, &c2, 1) >= 0)
exit (1);
return 1;
/* The Next x86 OpenStep bug shows up only when comparing 16 bytes
or more and with at least one buffer not starting on a 4-byte boundary.
@ -927,9 +926,9 @@ AC_DEFUN([AC_FUNC_MEMCMP],
strcpy (a, "--------01111111");
strcpy (b, "--------10000000");
if (memcmp (a, b, 16) >= 0)
exit (1);
return 1;
}
exit (0);
return 0;
}
]])],
[ac_cv_func_memcmp_working=yes],
@ -985,9 +984,9 @@ static char *tz_strings[] = {
};
#define N_STRINGS (sizeof (tz_strings) / sizeof (tz_strings[0]))
/* Fail if mktime fails to convert a date in the spring-forward gap.
/* Return 0 if mktime fails to convert a date in the spring-forward gap.
Based on a problem report from Andreas Jaeger. */
static void
static int
spring_forward_gap ()
{
/* glibc (up to about 1998-10-07) failed this test. */
@ -1006,29 +1005,27 @@ spring_forward_gap ()
tm.tm_min = 0;
tm.tm_sec = 0;
tm.tm_isdst = -1;
if (mktime (&tm) == (time_t)-1)
exit (1);
return mktime (&tm) != (time_t) -1;
}
static void
static int
mktime_test1 (now)
time_t now;
{
struct tm *lt;
if ((lt = localtime (&now)) && mktime (lt) != now)
exit (1);
return ! (lt = localtime (&now)) || mktime (lt) == now;
}
static void
static int
mktime_test (now)
time_t now;
{
mktime_test1 (now);
mktime_test1 ((time_t) (time_t_max - now));
mktime_test1 ((time_t) (time_t_min + now));
return (mktime_test1 (now)
&& mktime_test1 ((time_t) (time_t_max - now))
&& mktime_test1 ((time_t) (time_t_min + now)));
}
static void
static int
irix_6_4_bug ()
{
/* Based on code from Ariel Faigon. */
@ -1041,11 +1038,10 @@ irix_6_4_bug ()
tm.tm_sec = 0;
tm.tm_isdst = -1;
mktime (&tm);
if (tm.tm_mon != 2 || tm.tm_mday != 31)
exit (1);
return tm.tm_mon == 2 && tm.tm_mday == 31;
}
static void
static int
bigtime_test (j)
int j;
{
@ -1067,8 +1063,9 @@ bigtime_test (j)
&& 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);
return 0;
}
return 1;
}
int
@ -1095,18 +1092,20 @@ main ()
putenv (tz_strings[i]);
for (t = 0; t <= time_t_max - delta; t += delta)
mktime_test (t);
mktime_test ((time_t) 1);
mktime_test ((time_t) (60 * 60));
mktime_test ((time_t) (60 * 60 * 24));
if (! mktime_test (t))
return 1;
if (! (mktime_test ((time_t) 1)
&& mktime_test ((time_t) (60 * 60))
&& mktime_test ((time_t) (60 * 60 * 24))))
return 1;
for (j = 1; 0 < j; j *= 2)
bigtime_test (j);
bigtime_test (j - 1);
if (! bigtime_test (j))
return 1;
if (! bigtime_test (j - 1))
return 1;
}
irix_6_4_bug ();
spring_forward_gap ();
exit (0);
return ! (irix_6_4_bug () && spring_forward_gap ());
}]])],
[ac_cv_func_working_mktime=yes],
[ac_cv_func_working_mktime=no],
@ -1211,15 +1210,15 @@ main ()
/* First, make a file with some known garbage in it. */
data = (char *) malloc (pagesize);
if (!data)
exit (1);
return 1;
for (i = 0; i < pagesize; ++i)
*(data + i) = rand ();
umask (0);
fd = creat ("conftest.mmap", 0600);
if (fd < 0)
exit (1);
return 1;
if (write (fd, data, pagesize) != pagesize)
exit (1);
return 1;
close (fd);
/* Next, try to mmap the file at a fixed address which already has
@ -1227,17 +1226,17 @@ main ()
we see the same garbage. */
fd = open ("conftest.mmap", O_RDWR);
if (fd < 0)
exit (1);
return 1;
data2 = (char *) malloc (2 * pagesize);
if (!data2)
exit (1);
return 1;
data2 += (pagesize - ((long int) data2 & (pagesize - 1))) & (pagesize - 1);
if (data2 != mmap (data2, pagesize, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_FIXED, fd, 0L))
exit (1);
return 1;
for (i = 0; i < pagesize; ++i)
if (*(data + i) != *(data2 + i))
exit (1);
return 1;
/* Finally, make sure that changes to the mapped area do not
percolate back to the file as seen by read(). (This is a bug on
@ -1246,14 +1245,14 @@ main ()
*(data2 + i) = *(data2 + i) + 1;
data3 = (char *) malloc (pagesize);
if (!data3)
exit (1);
return 1;
if (read (fd, data3, pagesize) != pagesize)
exit (1);
return 1;
for (i = 0; i < pagesize; ++i)
if (*(data + i) != *(data3 + i))
exit (1);
return 1;
close (fd);
exit (0);
return 0;
}]])],
[ac_cv_func_mmap_fixed_mapped=yes],
[ac_cv_func_mmap_fixed_mapped=no],
@ -1313,7 +1312,7 @@ AC_CACHE_CHECK([for GNU libc compatible realloc], ac_cv_func_realloc_0_nonnull,
char *realloc ();
#endif
]],
[exit (realloc (0, 0) ? 0 : 1);])],
[return ! realloc (0, 0);])],
[ac_cv_func_realloc_0_nonnull=yes],
[ac_cv_func_realloc_0_nonnull=no],
[ac_cv_func_realloc_0_nonnull=no])])
@ -1395,7 +1394,7 @@ AC_DEFUN([AC_FUNC_SETPGRP],
[/* If this system has a BSD-style setpgrp which takes arguments,
setpgrp(1, 1) will fail with ESRCH and return -1, in that case
exit successfully. */
exit (setpgrp (1,1) == -1 ? 0 : 1);])],
return setpgrp (1,1) != -1;])],
[ac_cv_func_setpgrp_void=no],
[ac_cv_func_setpgrp_void=yes],
[AC_MSG_ERROR([cannot check setpgrp when cross compiling])])])
@ -1421,9 +1420,9 @@ AC_CACHE_CHECK([whether $1 accepts an empty string],
[ac_cv_func_$1_empty_string_bug],
[AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
[[struct stat sbuf;
exit ($1 ("", &sbuf) ? 1 : 0);]])],
[ac_cv_func_$1_empty_string_bug=yes],
return $1 ("", &sbuf) == 0;]])],
[ac_cv_func_$1_empty_string_bug=no],
[ac_cv_func_$1_empty_string_bug=yes],
[ac_cv_func_$1_empty_string_bug=yes])])
if test $ac_cv_func_$1_empty_string_bug = yes; then
AC_LIBOBJ([$1])
@ -1476,7 +1475,7 @@ main()
double value;
value = strtod (string, &term);
if (value != 69 || term != (string + 4))
exit (1);
return 1;
}
{
@ -1486,9 +1485,9 @@ main()
char *term;
strtod (string, &term);
if (term != string && *(term - 1) == 0)
exit (1);
return 1;
}
exit (0);
return 0;
}
]])],
ac_cv_func_strtod=yes,
@ -1535,7 +1534,7 @@ AC_CACHE_CHECK([whether strerror_r returns char *],
extern char *strerror_r ();],
[[char buf[100];
char x = *strerror_r (0, buf, sizeof buf);
exit (!isalpha (x));]])],
return ! isalpha (x);]])],
ac_cv_func_strerror_r_char_p=yes, , :)
fi
])
@ -1575,9 +1574,9 @@ AC_DEFUN([AC_FUNC_STRNLEN],
{
int expected = i <= S_LEN ? i : S_LEN;
if (strnlen (S, i) != expected)
exit (1);
return 1;
}
exit (0);
return 0;
]])],
[ac_cv_func_strnlen_working=yes],
[ac_cv_func_strnlen_working=no],
@ -1619,9 +1618,9 @@ AC_CACHE_CHECK(whether setvbuf arguments are reversed,
is not _IOLBF, _IONBF, or _IOFBF, and return nonzero. */
char buf;
if (setvbuf (stdout, _IOLBF, &buf, 1) != 0)
exit (1);
return 1;
putchar ('\r');
exit (0); /* Non-reversed systems SEGV here. */]])],
return 0; /* Non-reversed systems SEGV here. */]])],
[ac_cv_func_setvbuf_reversed=yes],
[],
[[: # Assume setvbuf is not reversed when cross-compiling.]])]
@ -1646,7 +1645,7 @@ AN_FUNCTION([strcoll], [AC_FUNC_STRCOLL])
AC_DEFUN([AC_FUNC_STRCOLL],
[AC_CACHE_CHECK(for working strcoll, ac_cv_func_strcoll_works,
[AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
[[exit (strcoll ("abc", "def") >= 0 ||
[[return (strcoll ("abc", "def") >= 0 ||
strcoll ("ABC", "DEF") >= 0 ||
strcoll ("123", "456") >= 0)]])],
ac_cv_func_strcoll_works=yes,
@ -1674,11 +1673,11 @@ AC_DEFUN([AC_FUNC_UTIME_NULL],
# Sequent interprets utime(file, 0) to mean use start of epoch. Wrong.
AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
[[struct stat s, t;
exit (!(stat ("conftest.data", &s) == 0
&& utime ("conftest.data", 0) == 0
&& stat ("conftest.data", &t) == 0
&& t.st_mtime >= s.st_mtime
&& t.st_mtime - s.st_mtime < 120));]])],
return ! (stat ("conftest.data", &s) == 0
&& utime ("conftest.data", 0) == 0
&& stat ("conftest.data", &t) == 0
&& t.st_mtime >= s.st_mtime
&& t.st_mtime - s.st_mtime < 120);]])],
ac_cv_func_utime_null=yes,
ac_cv_func_utime_null=no,
ac_cv_func_utime_null=no)])
@ -1749,9 +1748,7 @@ AC_DEFUN([_AC_FUNC_FORK],
[AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
[
/* By Ruediger Kuhlmann. */
if (fork() < 0)
exit (1);
exit (0);
return fork () < 0;
])],
[ac_cv_func_fork_works=yes],
[ac_cv_func_fork_works=no],
@ -1837,7 +1834,7 @@ main ()
while (wait(&status) != child)
;
exit(
return (
/* Was there some problem with vforking? */
child < 0
@ -1932,8 +1929,8 @@ main ()
wait3(&i, 0, &r);
/* Avoid "text file busy" from rm on fast HP-UX machines. */
sleep(2);
exit (r.ru_nvcsw == 0 && r.ru_majflt == 0 && r.ru_minflt == 0
&& r.ru_stime.tv_sec == 0 && r.ru_stime.tv_usec == 0);
return (r.ru_nvcsw == 0 && r.ru_majflt == 0 && r.ru_minflt == 0
&& r.ru_stime.tv_sec == 0 && r.ru_stime.tv_usec == 0);
}
}]])],
[ac_cv_func_wait3_rusage=yes],

4
lib/autoconf/headers.m4
View File

@ -643,8 +643,8 @@ main ()
for (i = 0; i < 256; i++)
if (XOR (islower (i), ISLOWER (i))
|| toupper (i) != TOUPPER (i))
exit (2);
exit (0);
return 2;
return 0;
}]])], , ac_cv_header_stdc=no, :)
fi])
if test $ac_cv_header_stdc = yes; then

4
lib/autoconf/specific.m4
View File

@ -280,7 +280,7 @@ main ()
sleep (3);
kill (getppid (), SIGINT);
sleep (3);
exit (0);
return 0;
}
signal (SIGINT, ucatch);
@ -289,7 +289,7 @@ main ()
if (status == -1)
wait (&i);
exit (status == -1);
return status == -1;
}])],
[ac_cv_sys_restartable_syscalls=yes],
[ac_cv_sys_restartable_syscalls=no])])

4
lib/autoconf/types.m4
View File

@ -139,7 +139,7 @@
# (not necessarily size_t etc.). Equally, instead of defining an unused
# variable, we just use a cast to avoid warnings from the compiler.
# Suggested by Paul Eggert.
#
#
# Now, the next issue is that C++ disallows defining types inside casts
# and inside `sizeof()', but we would like to allow unnamed structs, for
# use inside AC_CHECK_SIZEOF, for example. So we create a typedef of the
@ -280,7 +280,7 @@ main ()
/* Exit non-zero if getgroups seems to require an array of ints. This
happens when gid_t is short int but getgroups modifies an array
of ints. */
exit ((n > 0 && gidset[n] != val.gval) ? 1 : 0);
return n > 0 && gidset[n] != val.gval;
}]])],
[ac_cv_type_getgroups=gid_t],
[ac_cv_type_getgroups=int],

14
tests/compile.at
View File

@ -2,7 +2,7 @@
AT_BANNER([Low level compiling/preprocessing macros.])
# Copyright (C) 2000, 2001, 2003, 2005 Free Software Foundation, Inc.
# Copyright (C) 2000, 2001, 2003, 2005, 2006 Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
@ -116,19 +116,19 @@ AT_SETUP([AC_RUN_IFELSE])
AT_DATA([configure.ac],
[[AC_INIT
AC_RUN_IFELSE([AC_LANG_PROGRAM([], [exit (0)])],
AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0])],
[],
[AC_MSG_ERROR([saw `exit 0' as a failure])])
[AC_MSG_ERROR([saw `return 0' as a failure])])
AC_RUN_IFELSE([AC_LANG_PROGRAM([], [exit (2)])],
[AC_MSG_ERROR([saw `exit 2' as a success])],
AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 2])],
[AC_MSG_ERROR([saw `return 2' as a success])],
[status=$?
test $status != 2 &&
AC_MSG_ERROR([did not get as 2 exit status: $status])])
# The old stinky one.
AC_TRY_RUN([int main () { exit (3); }],
[AC_MSG_ERROR([saw `exit 3' as a success])],
AC_TRY_RUN([int main () { return 3; }],
[AC_MSG_ERROR([saw `return 3' as a success])],
[status=$?
test $status != 3 &&
AC_MSG_ERROR([did not get 3 as exit status: $status])])