configure.in: Test for ftruncate.

2001-02-26  Toon Moene  <toon@moene.indiv.nluug.nl>

	* libI77/configure.in: Test for ftruncate.
	* libI77/configure: Rebuilt.
	* libI77/endfile.c: Use fflush/ftruncate when available.

From-SVN: r40072

libf2c/ChangeLog

+2001-02-26  Toon Moene  <toon@moene.indiv.nluug.nl>
+
+	* libI77/configure.in: Test for ftruncate.
+	* libI77/configure: Rebuilt.
+	* libI77/endfile.c: Use fflush/ftruncate when available.
+
 2001-02-19  Joseph S. Myers  <jsm28@cam.ac.uk>
 
 	* libF77/Version.c, libI77/Version.c, libU77/Version.c: Update G77

libf2c/libI77/configure

@@ -1132,7 +1132,7 @@ else
 int main() {
 
 /* Ultrix mips cc rejects this.  */
-typedef int charset[2]; const charset x;
+typedef int charset[2]; const charset x = {0,0};
 /* SunOS 4.1.1 cc rejects this.  */
 char const *const *ccp;
 char **p;
@@ -1295,7 +1295,7 @@ else
   echo "$ac_t""no" 1>&6
 fi
 
-for ac_func in mkstemp
+for ac_func in ftruncate
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
 echo "configure:1302: checking for $ac_func" >&5
@@ -1350,7 +1350,7 @@ else
 fi
 done
 
-for ac_func in tempnam
+for ac_func in mkstemp
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
 echo "configure:1357: checking for $ac_func" >&5
@@ -1405,25 +1405,80 @@ else
 fi
 done
 
+for ac_func in tempnam
+do
+echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
+echo "configure:1412: checking for $ac_func" >&5
+if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  cat > conftest.$ac_ext <<EOF
+#line 1417 "configure"
+#include "confdefs.h"
+/* System header to define __stub macros and hopefully few prototypes,
+    which can conflict with char $ac_func(); below.  */
+#include <assert.h>
+/* Override any gcc2 internal prototype to avoid an error.  */
+/* We use char because int might match the return type of a gcc2
+    builtin and then its argument prototype would still apply.  */
+char $ac_func();
+
+int main() {
+
+/* The GNU C library defines this for functions which it implements
+    to always fail with ENOSYS.  Some functions are actually named
+    something starting with __ and the normal name is an alias.  */
+#if defined (__stub_$ac_func) || defined (__stub___$ac_func)
+choke me
+#else
+$ac_func();
+#endif
+
+; return 0; }
+EOF
+if { (eval echo configure:1440: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+  rm -rf conftest*
+  eval "ac_cv_func_$ac_func=yes"
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  eval "ac_cv_func_$ac_func=no"
+fi
+rm -f conftest*
+fi
+
+if eval "test \"`echo '$ac_cv_func_'$ac_func`\" = yes"; then
+  echo "$ac_t""yes" 1>&6
+    ac_tr_func=HAVE_`echo $ac_func | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
+  cat >> confdefs.h <<EOF
+#define $ac_tr_func 1
+EOF
+ 
+else
+  echo "$ac_t""no" 1>&6
+fi
+done
+
 
 # posix will guarantee the right behaviour for sprintf, else we can't be
 # sure; HEADER_STDC wouldn't be the right check in sunos4, for instance.
 # However, on my sunos4/gcc setup unistd.h leads us wrongly to believe
 # we're posix-conformant, so always do the test.
 echo $ac_n "checking for ansi/posix sprintf result""... $ac_c" 1>&6
-echo "configure:1415: checking for ansi/posix sprintf result" >&5
+echo "configure:1470: checking for ansi/posix sprintf result" >&5
 if test "$cross_compiling" = yes; then
   g77_cv_sys_sprintf_ansi=no
 else
   cat > conftest.$ac_ext <<EOF
-#line 1420 "configure"
+#line 1475 "configure"
 #include "confdefs.h"
   #include <stdio.h>
     /* does sprintf return the number of chars transferred? */
     main () {char foo[2]; (sprintf(foo, "1") == 1) ? exit(0) : exit(1);}
 
 EOF
-if { (eval echo configure:1427: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:1482: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   g77_cv_sys_sprintf_ansi=yes
 else
@@ -1454,9 +1509,9 @@ fi
 
 # define NON_ANSI_RW_MODES on unix (can't hurt)
 echo $ac_n "checking NON_ANSI_RW_MODES""... $ac_c" 1>&6
-echo "configure:1458: checking NON_ANSI_RW_MODES" >&5
+echo "configure:1513: checking NON_ANSI_RW_MODES" >&5
 cat > conftest.$ac_ext <<EOF
-#line 1460 "configure"
+#line 1515 "configure"
 #include "confdefs.h"
 #ifdef unix
   yes

libf2c/libI77/configure.in

@@ -134,6 +134,7 @@ else
   AC_MSG_RESULT(no)
 fi
 
+AC_CHECK_FUNCS(ftruncate)
 AC_CHECK_FUNCS(mkstemp)
 AC_CHECK_FUNCS(tempnam)
 

libf2c/libI77/endfile.c

 #include "f2c.h"
 #include "fio.h"
 
+#include <unistd.h>
+
 #ifdef KR_headers
 extern char *strcpy();
 extern FILE *tmpfile();
@@ -38,6 +40,7 @@ integer f_end(alist *a)
 	return(b->useek ? t_runc(a) : 0);
 }
 
+#ifndef HAVE_FTRUNCATE
  static int
 #ifdef KR_headers
 copy(from, len, to) FILE *from, *to; register long len;
@@ -56,6 +59,7 @@ copy(FILE *from, register long len, FILE *to)
 		}
 	return 0;
 	}
+#endif /* !defined(HAVE_FTRUNCATE) */
 
  int
 #ifdef KR_headers
@@ -66,8 +70,11 @@ t_runc(alist *a)
 {
 	long loc, len;
 	unit *b;
-	FILE *bf, *tf;
-	int rc = 0;
+	int rc;
+	FILE *bf;
+#ifndef HAVE_FTRUNCATE
+	FILE *tf;
+#endif /* !defined(HAVE_FTRUNCATE) */
 
 	b = &f__units[a->aunit];
 	if(b->url)
@@ -77,6 +84,8 @@ t_runc(alist *a)
 	len=ftell(bf);
 	if (loc >= len || b->useek == 0 || b->ufnm == NULL)
 		return(0);
+#ifndef HAVE_FTRUNCATE
+	rc = 0;
 	fclose(b->ufd);
 	if (!loc) {
 		if (!(bf = fopen(b->ufnm, f__w_mode[b->ufmt])))
@@ -118,6 +127,10 @@ done1:
 	fclose(tf);
 done:
 	f__cf = b->ufd = bf;
+#else  /* !defined(HAVE_FTRUNCATE) */
+	fflush(b->ufd);
+	rc = ftruncate(fileno(b->ufd),loc);
+#endif /* !defined(HAVE_FTRUNCATE) */
 	if (rc)
 		err(a->aerr,111,"endfile");
 	return 0;