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PR modula2/115276 bugfix libgm2 wraptime.InitTM returns NIL

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This patch fixes libgm2/libm2iso/wraptime.cc:InitTM so that
it does not always return NULL.  The incorrect autoconf macro
was used (inside InitTM) and the function short circuited
to return NULL.  The fix is to use HAVE_SYS_TIME_H and use
AC_HEADER_TIME in libgm2/configure.ac.

libgm2/ChangeLog:

	PR modula2/115276
	* config.h.in: Regenerate.
	* configure: Regenerate.
	* configure.ac: Use AC_HEADER_TIME.
	* libm2iso/wraptime.cc (InitTM): Check HAVE_SYS_TIME_H
	before using struct tm to obtain the size.

gcc/testsuite/ChangeLog:

	PR modula2/115276
	* gm2/isolib/run/pass/testinittm.mod: New test.

Signed-off-by: Gaius Mulley <gaiusmod2@gmail.com>
This commit is contained in:
Gaius Mulley 2024-05-29 17:26:59 +01:00
parent 547143df5a
commit d1a1f7e9f0
5 changed files with 59 additions and 3 deletions
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17
gcc/testsuite/gm2/isolib/run/pass/testinittm.mod Normal file
View File

@ -0,0 +1,17 @@
MODULE testinittm ;
FROM wraptime IMPORT InitTM, tm ;
FROM libc IMPORT printf, exit ;
VAR
m: tm ;
BEGIN
m := InitTM () ;
IF m = NIL
THEN
printf ("InitTM failed\n");
exit (1)
ELSE
printf ("InitTM passed\n")
END
END testinittm.

3
libgm2/config.h.in
View File

@ -335,6 +335,9 @@
/* Define to 1 if you have the ANSI C header files. */
#undef STDC_HEADERS
/* Define to 1 if you can safely include both <sys/time.h> and <time.h>. */
#undef TIME_WITH_SYS_TIME
/* Enable extensions on AIX 3, Interix. */
#ifndef _ALL_SOURCE
# undef _ALL_SOURCE

39
libgm2/configure vendored
View File

@ -6837,6 +6837,41 @@ $as_echo "#define HAVE_SYS_WAIT_H 1" >>confdefs.h
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether time.h and sys/time.h may both be included" >&5
$as_echo_n "checking whether time.h and sys/time.h may both be included... " >&6; }
if ${ac_cv_header_time+:} false; then :
$as_echo_n "(cached) " >&6
else
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include <sys/types.h>
#include <sys/time.h>
#include <time.h>
int
main ()
{
if ((struct tm *) 0)
return 0;
;
return 0;
}
_ACEOF
if ac_fn_c_try_compile "$LINENO"; then :
ac_cv_header_time=yes
else
ac_cv_header_time=no
fi
rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_header_time" >&5
$as_echo "$ac_cv_header_time" >&6; }
if test $ac_cv_header_time = yes; then
$as_echo "#define TIME_WITH_SYS_TIME 1" >>confdefs.h
fi
ac_fn_c_check_header_mongrel "$LINENO" "math.h" "ac_cv_header_math_h" "$ac_includes_default"
if test "x$ac_cv_header_math_h" = xyes; then :
@ -14544,7 +14579,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
#line 14547 "configure"
#line 14582 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
@ -14650,7 +14685,7 @@ else
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
#line 14653 "configure"
#line 14688 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H

1
libgm2/configure.ac
View File

@ -88,6 +88,7 @@ AC_ARG_WITH(cross-host,
# Checks for header files.
AC_HEADER_STDC
AC_HEADER_SYS_WAIT
AC_HEADER_TIME
AC_CHECK_HEADER([math.h],
[AC_DEFINE([HAVE_MATH_H], [1], [have math.h])])

2
libgm2/libm2iso/wraptime.cc
View File

@ -113,7 +113,7 @@ EXPORT(KillTimezone) (struct timezone *tv)
/* InitTM - returns a newly created opaque type. */
#if defined(HAVE_STRUCT_TM) && defined(HAVE_MALLOC_H)
#if defined(HAVE_SYS_TIME_H) && defined(HAVE_MALLOC_H)
extern "C" struct tm *
EXPORT(InitTM) (void)
{