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peterepetere
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Add configure tests for stdbool.h and sizeof bool
This will allow us to assess how many platforms have bool with a size other than 1, which will help us decide how to go forward with using stdbool.h. Discussion: https://www.postgresql.org/message-id/flat/3a0fe7e1-5ed1-414b-9230-53bbc0ed1f49@2ndquadrant.com
1 parent d2d7988 commit f20b328

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3 files changed

+188
-41
lines changed

3 files changed

+188
-41
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‎configure

+172-41
Original file line numberDiff line numberDiff line change
@@ -2107,116 +2107,116 @@ $as_echo "$ac_res" >&6; }
21072107

21082108
} # ac_fn_c_check_func
21092109

2110-
# ac_fn_c_check_member LINENO AGGR MEMBER VAR INCLUDES
2111-
# ----------------------------------------------------
2112-
# Tries to find if the field MEMBER exists in type AGGR, after including
2113-
# INCLUDES, setting cache variable VAR accordingly.
2114-
ac_fn_c_check_member ()
2110+
# ac_fn_c_check_type LINENO TYPE VAR INCLUDES
2111+
# -------------------------------------------
2112+
# Tests whether TYPE exists after having included INCLUDES, setting cache
2113+
# variable VAR accordingly.
2114+
ac_fn_c_check_type ()
21152115
{
21162116
as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
2117-
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2.$3" >&5
2118-
$as_echo_n "checking for $2.$3... " >&6; }
2119-
if eval \${$4+:} false; then :
2117+
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
2118+
$as_echo_n "checking for $2... " >&6; }
2119+
if eval \${$3+:} false; then :
21202120
$as_echo_n "(cached) " >&6
21212121
else
2122+
eval "$3=no"
21222123
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
21232124
/* end confdefs.h. */
2124-
$5
2125+
$4
21252126
int
21262127
main ()
21272128
{
2128-
static $2 ac_aggr;
2129-
if (ac_aggr.$3)
2130-
return 0;
2129+
if (sizeof ($2))
2130+
return 0;
21312131
;
21322132
return 0;
21332133
}
21342134
_ACEOF
21352135
if ac_fn_c_try_compile "$LINENO"; then :
2136-
eval "$4=yes"
2137-
else
21382136
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
21392137
/* end confdefs.h. */
2140-
$5
2138+
$4
21412139
int
21422140
main ()
21432141
{
2144-
static $2 ac_aggr;
2145-
if (sizeof ac_aggr.$3)
2146-
return 0;
2142+
if (sizeof (($2)))
2143+
return 0;
21472144
;
21482145
return 0;
21492146
}
21502147
_ACEOF
21512148
if ac_fn_c_try_compile "$LINENO"; then :
2152-
eval "$4=yes"
2149+
21532150
else
2154-
eval "$4=no"
2151+
eval "$3=yes"
21552152
fi
21562153
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
21572154
fi
21582155
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
21592156
fi
2160-
eval ac_res=\$$4
2157+
eval ac_res=\$$3
21612158
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
21622159
$as_echo "$ac_res" >&6; }
21632160
eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
21642161

2165-
} # ac_fn_c_check_member
2162+
} # ac_fn_c_check_type
21662163

2167-
# ac_fn_c_check_type LINENO TYPE VAR INCLUDES
2168-
# -------------------------------------------
2169-
# Tests whether TYPE exists after having included INCLUDES, setting cache
2170-
# variable VAR accordingly.
2171-
ac_fn_c_check_type ()
2164+
# ac_fn_c_check_member LINENO AGGR MEMBER VAR INCLUDES
2165+
# ----------------------------------------------------
2166+
# Tries to find if the field MEMBER exists in type AGGR, after including
2167+
# INCLUDES, setting cache variable VAR accordingly.
2168+
ac_fn_c_check_member ()
21722169
{
21732170
as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
2174-
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
2175-
$as_echo_n "checking for $2... " >&6; }
2176-
if eval \${$3+:} false; then :
2171+
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2.$3" >&5
2172+
$as_echo_n "checking for $2.$3... " >&6; }
2173+
if eval \${$4+:} false; then :
21772174
$as_echo_n "(cached) " >&6
21782175
else
2179-
eval "$3=no"
21802176
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
21812177
/* end confdefs.h. */
2182-
$4
2178+
$5
21832179
int
21842180
main ()
21852181
{
2186-
if (sizeof ($2))
2187-
return 0;
2182+
static $2 ac_aggr;
2183+
if (ac_aggr.$3)
2184+
return 0;
21882185
;
21892186
return 0;
21902187
}
21912188
_ACEOF
21922189
if ac_fn_c_try_compile "$LINENO"; then :
2190+
eval "$4=yes"
2191+
else
21932192
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
21942193
/* end confdefs.h. */
2195-
$4
2194+
$5
21962195
int
21972196
main ()
21982197
{
2199-
if (sizeof (($2)))
2200-
return 0;
2198+
static $2 ac_aggr;
2199+
if (sizeof ac_aggr.$3)
2200+
return 0;
22012201
;
22022202
return 0;
22032203
}
22042204
_ACEOF
22052205
if ac_fn_c_try_compile "$LINENO"; then :
2206-
2206+
eval "$4=yes"
22072207
else
2208-
eval "$3=yes"
2208+
eval "$4=no"
22092209
fi
22102210
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
22112211
fi
22122212
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
22132213
fi
2214-
eval ac_res=\$$3
2214+
eval ac_res=\$$4
22152215
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
22162216
$as_echo "$ac_res" >&6; }
22172217
eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
22182218

2219-
} # ac_fn_c_check_type
2219+
} # ac_fn_c_check_member
22202220

22212221
# ac_fn_c_compute_int LINENO EXPR VAR INCLUDES
22222222
# --------------------------------------------
@@ -12305,6 +12305,100 @@ fi
1230512305
## Header files
1230612306
##
1230712307

12308+
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for stdbool.h that conforms to C99" >&5
12309+
$as_echo_n "checking for stdbool.h that conforms to C99... " >&6; }
12310+
if ${ac_cv_header_stdbool_h+:} false; then :
12311+
$as_echo_n "(cached) " >&6
12312+
else
12313+
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
12314+
/* end confdefs.h. */
12315+
12316+
#include <stdbool.h>
12317+
#ifndef bool
12318+
"error: bool is not defined"
12319+
#endif
12320+
#ifndef false
12321+
"error: false is not defined"
12322+
#endif
12323+
#if false
12324+
"error: false is not 0"
12325+
#endif
12326+
#ifndef true
12327+
"error: true is not defined"
12328+
#endif
12329+
#if true != 1
12330+
"error: true is not 1"
12331+
#endif
12332+
#ifndef __bool_true_false_are_defined
12333+
"error: __bool_true_false_are_defined is not defined"
12334+
#endif
12335+
12336+
struct s { _Bool s: 1; _Bool t; } s;
12337+
12338+
char a[true == 1 ? 1 : -1];
12339+
char b[false == 0 ? 1 : -1];
12340+
char c[__bool_true_false_are_defined == 1 ? 1 : -1];
12341+
char d[(bool) 0.5 == true ? 1 : -1];
12342+
/* See body of main program for 'e'. */
12343+
char f[(_Bool) 0.0 == false ? 1 : -1];
12344+
char g[true];
12345+
char h[sizeof (_Bool)];
12346+
char i[sizeof s.t];
12347+
enum { j = false, k = true, l = false * true, m = true * 256 };
12348+
/* The following fails for
12349+
HP aC++/ANSI C B3910B A.05.55 [Dec 04 2003]. */
12350+
_Bool n[m];
12351+
char o[sizeof n == m * sizeof n[0] ? 1 : -1];
12352+
char p[-1 - (_Bool) 0 < 0 && -1 - (bool) 0 < 0 ? 1 : -1];
12353+
/* Catch a bug in an HP-UX C compiler. See
12354+
http://gcc.gnu.org/ml/gcc-patches/2003-12/msg02303.html
12355+
http://lists.gnu.org/archive/html/bug-coreutils/2005-11/msg00161.html
12356+
*/
12357+
_Bool q = true;
12358+
_Bool *pq = &q;
12359+
12360+
int
12361+
main ()
12362+
{
12363+
12364+
bool e = &s;
12365+
*pq |= q;
12366+
*pq |= ! q;
12367+
/* Refer to every declared value, to avoid compiler optimizations. */
12368+
return (!a + !b + !c + !d + !e + !f + !g + !h + !i + !!j + !k + !!l
12369+
+ !m + !n + !o + !p + !q + !pq);
12370+
12371+
;
12372+
return 0;
12373+
}
12374+
_ACEOF
12375+
if ac_fn_c_try_compile "$LINENO"; then :
12376+
ac_cv_header_stdbool_h=yes
12377+
else
12378+
ac_cv_header_stdbool_h=no
12379+
fi
12380+
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
12381+
fi
12382+
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_stdbool_h" >&5
12383+
$as_echo "$ac_cv_header_stdbool_h" >&6; }
12384+
ac_fn_c_check_type "$LINENO" "_Bool" "ac_cv_type__Bool" "$ac_includes_default"
12385+
if test "x$ac_cv_type__Bool" = xyes; then :
12386+
12387+
cat >>confdefs.h <<_ACEOF
12388+
#define HAVE__BOOL 1
12389+
_ACEOF
12390+
12391+
12392+
fi
12393+
12394+
12395+
if test $ac_cv_header_stdbool_h = yes; then
12396+
12397+
$as_echo "#define HAVE_STDBOOL_H 1" >>confdefs.h
12398+
12399+
fi
12400+
12401+
1230812402
for ac_header in atomic.h crypt.h dld.h fp_class.h getopt.h ieeefp.h ifaddrs.h langinfo.h mbarrier.h poll.h sys/epoll.h sys/ipc.h sys/pstat.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/sockio.h sys/tas.h sys/un.h termios.h ucred.h utime.h wchar.h wctype.h
1230912403
do :
1231012404
as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
@@ -14483,6 +14577,43 @@ if test "$ac_cv_sizeof_off_t" -lt 8 -a "$segsize" != "1"; then
1448314577
as_fn_error $? "Large file support is not enabled. Segment size cannot be larger than 1GB." "$LINENO" 5
1448414578
fi
1448514579

14580+
# The cast to long int works around a bug in the HP C Compiler
14581+
# version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
14582+
# declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
14583+
# This bug is HP SR number 8606223364.
14584+
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking size of bool" >&5
14585+
$as_echo_n "checking size of bool... " >&6; }
14586+
if ${ac_cv_sizeof_bool+:} false; then :
14587+
$as_echo_n "(cached) " >&6
14588+
else
14589+
if ac_fn_c_compute_int "$LINENO" "(long int) (sizeof (bool))" "ac_cv_sizeof_bool" "#ifdef HAVE_STDBOOL_H
14590+
#include <stdbool.h>
14591+
#endif
14592+
"; then :
14593+
14594+
else
14595+
if test "$ac_cv_type_bool" = yes; then
14596+
{ { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
14597+
$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
14598+
as_fn_error 77 "cannot compute sizeof (bool)
14599+
See \`config.log' for more details" "$LINENO" 5; }
14600+
else
14601+
ac_cv_sizeof_bool=0
14602+
fi
14603+
fi
14604+
14605+
fi
14606+
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_sizeof_bool" >&5
14607+
$as_echo "$ac_cv_sizeof_bool" >&6; }
14608+
14609+
14610+
14611+
cat >>confdefs.h <<_ACEOF
14612+
#define SIZEOF_BOOL $ac_cv_sizeof_bool
14613+
_ACEOF
14614+
14615+
14616+
1448614617

1448714618
##
1448814619
## Functions, global variables

‎configure.in

+7
Original file line numberDiff line numberDiff line change
@@ -1245,6 +1245,8 @@ AC_SUBST(UUID_LIBS)
12451245
## Header files
12461246
##
12471247

1248+
AC_HEADER_STDBOOL
1249+
12481250
AC_CHECK_HEADERS([atomic.h crypt.h dld.h fp_class.h getopt.h ieeefp.h ifaddrs.h langinfo.h mbarrier.h poll.h sys/epoll.h sys/ipc.h sys/pstat.h sys/resource.h sys/select.h sys/sem.h sys/shm.h sys/sockio.h sys/tas.h sys/un.h termios.h ucred.h utime.h wchar.h wctype.h])
12491251

12501252
# On BSD, test for net/if.h will fail unless sys/socket.h
@@ -1503,6 +1505,11 @@ if test "$ac_cv_sizeof_off_t" -lt 8 -a "$segsize" != "1"; then
15031505
AC_MSG_ERROR([Large file support is not enabled. Segment size cannot be larger than 1GB.])
15041506
fi
15051507

1508+
AC_CHECK_SIZEOF([bool], [],
1509+
[#ifdef HAVE_STDBOOL_H
1510+
#include <stdbool.h>
1511+
#endif])
1512+
15061513

15071514
##
15081515
## Functions, global variables

‎src/include/pg_config.h.in

+9
Original file line numberDiff line numberDiff line change
@@ -501,6 +501,9 @@
501501
/* Define to 1 if you have the `SSL_get_current_compression' function. */
502502
#undef HAVE_SSL_GET_CURRENT_COMPRESSION
503503

504+
/* Define to 1 if stdbool.h conforms to C99. */
505+
#undef HAVE_STDBOOL_H
506+
504507
/* Define to 1 if you have the <stdint.h> header file. */
505508
#undef HAVE_STDINT_H
506509

@@ -703,6 +706,9 @@
703706
/* Define to 1 if you have the `X509_get_signature_nid' function. */
704707
#undef HAVE_X509_GET_SIGNATURE_NID
705708

709+
/* Define to 1 if the system has the type `_Bool'. */
710+
#undef HAVE__BOOL
711+
706712
/* Define to 1 if your compiler understands __builtin_bswap16. */
707713
#undef HAVE__BUILTIN_BSWAP16
708714

@@ -812,6 +818,9 @@
812818
RELSEG_SIZE requires an initdb. */
813819
#undef RELSEG_SIZE
814820

821+
/* The size of `bool', as computed by sizeof. */
822+
#undef SIZEOF_BOOL
823+
815824
/* The size of `long', as computed by sizeof. */
816825
#undef SIZEOF_LONG
817826

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