* configure.in: Check whether printf family supports printing

	long doubles or not and define PRINTF_HAS_LONG_DOUBLE if so.
	* acconfig.h: Provide default undef for PRINTF_HAS_LONG_DOUBLE.
	* configure: Regenerate.
	* valprint.c (print_floating): Use PRINTF_HAS_LONG_DOUBLE.
	* c-exp.y (parse_number): Use PRINTF_HAS_LONG_DOUBLE.
	* configure.in: Fix have_gregset and have_fpregset autoconf
	variable names so that they match the pattern required to
	cache them.

6 files changed, 140 insertions, 55 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index e5c06a5..c8e668e 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,15 @@
+Sat Mar 30 11:00:22 1996  Fred Fish  <fnf@cygnus.com>
+
+	* configure.in: Check whether printf family supports printing
+	long doubles or not and define PRINTF_HAS_LONG_DOUBLE if so.
+	* acconfig.h: Provide default undef for PRINTF_HAS_LONG_DOUBLE.
+	* configure: Regenerate.
+	* valprint.c (print_floating): Use PRINTF_HAS_LONG_DOUBLE.
+	* c-exp.y (parse_number): Use PRINTF_HAS_LONG_DOUBLE.
+	* configure.in: Fix have_gregset and have_fpregset autoconf
+	variable names so that they match the pattern required to
+	cache them.
+
 Fri Mar 29 21:39:56 1996  Fred Fish  <fnf@cygnus.com>
 
 	* core-aout.c (fetch_core_registers): Cast core_reg_size to int
diff --git a/gdb/acconfig.h b/gdb/acconfig.h
index 2dec654..bb9b991 100644
--- a/gdb/acconfig.h
+++ b/gdb/acconfig.h
@@ -4,3 +4,6 @@
 
 /* Define if gregset_t type is available. */
 #undef HAVE_GREGSET_T
+
+/* Define if the "%Lg" format works to print long doubles. */
+#undef PRINTF_HAS_LONG_DOUBLE
diff --git a/gdb/c-exp.y b/gdb/c-exp.y
index 9070a05..3c7c690 100644
--- a/gdb/c-exp.y
+++ b/gdb/c-exp.y
@@ -942,7 +942,18 @@ parse_number (p, len, parsed_float, putithere)
       else if (sizeof (putithere->typed_val_float.dval) <= sizeof (double))
 	sscanf (p, "%lg", &putithere->typed_val_float.dval);
       else
-	sscanf (p, "%Lg", &putithere->typed_val_float.dval);
+	{
+#ifdef PRINTF_HAS_LONG_DOUBLE
+	  sscanf (p, "%Lg", &putithere->typed_val_float.dval);
+#else
+	  /* Scan it into a double, then assign it to the long double.
+	     This at least wins with values representable in the range
+	     of doubles. */
+	  double temp;
+	  sscanf (p, "%lg", &temp);
+	  putithere->typed_val_float.dval = temp;
+#endif
+	}
 
       /* See if it has `f' or `l' suffix (float or long double).  */
 
diff --git a/gdb/config.in b/gdb/config.in
index a3f8f2e..1667bd3 100644
--- a/gdb/config.in
+++ b/gdb/config.in
@@ -35,6 +35,9 @@
 /* Define if gregset_t type is available. */
 #undef HAVE_GREGSET_T
 
+/* Define if the "%Lg" format works to print long doubles. */
+#undef PRINTF_HAS_LONG_DOUBLE
+
 /* Define if you have the getpagesize function.  */
 #undef HAVE_GETPAGESIZE
 
diff --git a/gdb/configure b/gdb/configure
index 7cca5be..6ef555f 100755
--- a/gdb/configure
+++ b/gdb/configure
@@ -1283,7 +1283,7 @@ fi
 
 
 echo $ac_n "checking for gregset_t type""... $ac_c" 1>&6
-if eval "test \"`echo '$''{'gdb_have_gregset_t'+set}'`\" = set"; then
+if eval "test \"`echo '$''{'gdb_cv_have_gregset_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
@@ -1297,17 +1297,17 @@ gregset_t *gregsetp = 0
 EOF
 if { (eval echo configure:1299: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
   rm -rf conftest*
-  gdb_have_gregset_t=yes
+  gdb_cv_have_gregset_t=yes
 else
   rm -rf conftest*
-  gdb_have_gregset_t=no
+  gdb_cv_have_gregset_t=no
 fi
 rm -f conftest*
 
 fi
 
-echo "$ac_t""$gdb_have_gregset_t" 1>&6
-if test $gdb_have_gregset_t = yes; then
+echo "$ac_t""$gdb_cv_have_gregset_t" 1>&6
+if test $gdb_cv_have_gregset_t = yes; then
   cat >> confdefs.h <<\EOF
 #define HAVE_GREGSET_T 1
 EOF
@@ -1315,7 +1315,7 @@ EOF
 fi
 
 echo $ac_n "checking for fpregset_t type""... $ac_c" 1>&6
-if eval "test \"`echo '$''{'gdb_have_fpregset_t'+set}'`\" = set"; then
+if eval "test \"`echo '$''{'gdb_cv_have_fpregset_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
@@ -1329,17 +1329,17 @@ fpregset_t *fpregsetp = 0
 EOF
 if { (eval echo configure:1331: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
   rm -rf conftest*
-  gdb_have_fpregset_t=yes
+  gdb_cv_have_fpregset_t=yes
 else
   rm -rf conftest*
-  gdb_have_fpregset_t=no
+  gdb_cv_have_fpregset_t=no
 fi
 rm -f conftest*
 
 fi
 
-echo "$ac_t""$gdb_have_fpregset_t" 1>&6
-if test $gdb_have_fpregset_t = yes; then
+echo "$ac_t""$gdb_cv_have_fpregset_t" 1>&6
+if test $gdb_cv_have_fpregset_t = yes; then
   cat >> confdefs.h <<\EOF
 #define HAVE_FPREGSET_T 1
 EOF
@@ -1347,7 +1347,7 @@ EOF
 fi
 
 
-echo $ac_n "checking for long double""... $ac_c" 1>&6
+echo $ac_n "checking for long double support in compiler""... $ac_c" 1>&6
 if eval "test \"`echo '$''{'ac_cv_c_long_double'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -1379,6 +1379,43 @@ EOF
 
 fi
 
+
+echo $ac_n "checking for long double support in printf""... $ac_c" 1>&6
+if eval "test \"`echo '$''{'gdb_cv_printf_has_long_double'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  if test "$cross_compiling" = yes; then
+  gdb_cv_printf_has_long_double=no
+else
+cat > conftest.$ac_ext <<EOF
+#line 1392 "configure"
+#include "confdefs.h"
+
+int main () {
+  char buf[16];
+  long double f = 3.141592653;
+  sprintf (buf, "%Lg", f);
+  return (strncmp ("3.14159", buf, 7));
+}
+EOF
+{ (eval echo configure:1402: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }
+if test -s conftest && (./conftest; exit) 2>/dev/null; then
+  gdb_cv_printf_has_long_double=yes
+else
+  gdb_cv_printf_has_long_double=no
+fi
+fi
+rm -fr conftest*
+fi
+
+if test $gdb_cv_printf_has_long_double = yes; then
+  cat >> confdefs.h <<\EOF
+#define PRINTF_HAS_LONG_DOUBLE 1
+EOF
+
+fi
+echo "$ac_t""$gdb_cv_printf_has_long_double" 1>&6
+
 for ac_func in valloc getpagesize
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
@@ -1386,7 +1423,7 @@ if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 1390 "configure"
+#line 1427 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char $ac_func(); below.  */
@@ -1408,7 +1445,7 @@ $ac_func();
 
 ; return 0; }
 EOF
-if { (eval echo configure:1412: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
+if { (eval echo configure:1449: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
   rm -rf conftest*
   eval "ac_cv_func_$ac_func=yes"
 else
@@ -1438,7 +1475,7 @@ else
   ac_cv_func_mmap=no
 else
 cat > conftest.$ac_ext <<EOF
-#line 1442 "configure"
+#line 1479 "configure"
 #include "confdefs.h"
 
 /* Thanks to Mike Haertel and Jim Avera for this test. */
@@ -1507,7 +1544,7 @@ main()
 }
 
 EOF
-{ (eval echo configure:1511: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }
+{ (eval echo configure:1548: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }
 if test -s conftest && (./conftest; exit) 2>/dev/null; then
   ac_cv_func_mmap=yes
 else
@@ -1675,12 +1712,12 @@ if test "$ac_x_includes" = NO; then
 
   # First, try using that file with no special directory specified.
 cat > conftest.$ac_ext <<EOF
-#line 1679 "configure"
+#line 1716 "configure"
 #include "confdefs.h"
 #include <$x_direct_test_include>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:1684: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:1721: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -1747,7 +1784,7 @@ if test "$ac_x_libraries" = NO; then
   ac_save_LIBS="$LIBS"
   LIBS="-l$x_direct_test_library $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 1751 "configure"
+#line 1788 "configure"
 #include "confdefs.h"
 
 int main() { return 0; }
@@ -1755,7 +1792,7 @@ int t() {
 ${x_direct_test_function}()
 ; return 0; }
 EOF
-if { (eval echo configure:1759: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
+if { (eval echo configure:1796: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
   rm -rf conftest*
   LIBS="$ac_save_LIBS"
 # We can link X programs with no special library path.
@@ -1876,7 +1913,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lICE  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 1880 "configure"
+#line 1917 "configure"
 #include "confdefs.h"
 
 int main() { return 0; }
@@ -1884,7 +1921,7 @@ int t() {
 IceConnectionNumber()
 ; return 0; }
 EOF
-if { (eval echo configure:1888: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
+if { (eval echo configure:1925: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -1920,7 +1957,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-ldnet  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 1924 "configure"
+#line 1961 "configure"
 #include "confdefs.h"
 
 int main() { return 0; }
@@ -1928,7 +1965,7 @@ int t() {
 dnet_ntoa()
 ; return 0; }
 EOF
-if { (eval echo configure:1932: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
+if { (eval echo configure:1969: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -1955,7 +1992,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-ldnet_stub  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 1959 "configure"
+#line 1996 "configure"
 #include "confdefs.h"
 
 int main() { return 0; }
@@ -1963,7 +2000,7 @@ int t() {
 dnet_ntoa()
 ; return 0; }
 EOF
-if { (eval echo configure:1967: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
+if { (eval echo configure:2004: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -1995,7 +2032,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lnsl  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 1999 "configure"
+#line 2036 "configure"
 #include "confdefs.h"
 
 int main() { return 0; }
@@ -2003,7 +2040,7 @@ int t() {
 t_accept()
 ; return 0; }
 EOF
-if { (eval echo configure:2007: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
+if { (eval echo configure:2044: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -2034,7 +2071,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lsocket  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 2038 "configure"
+#line 2075 "configure"
 #include "confdefs.h"
 
 int main() { return 0; }
@@ -2042,7 +2079,7 @@ int t() {
 socket()
 ; return 0; }
 EOF
-if { (eval echo configure:2046: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
+if { (eval echo configure:2083: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -2139,12 +2176,12 @@ if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 2143 "configure"
+#line 2180 "configure"
 #include "confdefs.h"
 #include <tclInt.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:2148: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:2185: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -2197,7 +2234,7 @@ if test "$cross_compiling" = yes; then
 
 else
 cat > conftest.$ac_ext <<EOF
-#line 2201 "configure"
+#line 2238 "configure"
 #include "confdefs.h"
 
 #include <stdio.h>
@@ -2212,7 +2249,7 @@ main() {
 	return 0;
 }
 EOF
-{ (eval echo configure:2216: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }
+{ (eval echo configure:2253: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }
 if test -s conftest && (./conftest; exit) 2>/dev/null; then
   tclmajor=`cat tclmajor`
 	tclminor=`cat tclminor`
@@ -2357,13 +2394,13 @@ else
   ac_cv_c_tclib="-l$installedtcllibroot"
 else
 cat > conftest.$ac_ext <<EOF
-#line 2361 "configure"
+#line 2398 "configure"
 #include "confdefs.h"
 
     Tcl_AppInit()
     { exit(0); }
 EOF
-{ (eval echo configure:2367: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }
+{ (eval echo configure:2404: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }
 if test -s conftest && (./conftest; exit) 2>/dev/null; then
   ac_cv_c_tcllib="-l$installedtcllibroot"
 else
@@ -2473,12 +2510,12 @@ if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 2477 "configure"
+#line 2514 "configure"
 #include "confdefs.h"
 #include <tk.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:2482: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:2519: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -2538,7 +2575,7 @@ if test "$cross_compiling" = yes; then
 
 else
 cat > conftest.$ac_ext <<EOF
-#line 2542 "configure"
+#line 2579 "configure"
 #include "confdefs.h"
 
 #include <stdio.h>
@@ -2553,7 +2590,7 @@ cat > conftest.$ac_ext <<EOF
 	return 0;
 }
 EOF
-{ (eval echo configure:2557: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }
+{ (eval echo configure:2594: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }
 if test -s conftest && (./conftest; exit) 2>/dev/null; then
   tkmajor=`cat tkmajor`
 	tkminor=`cat tkminor`
@@ -2719,13 +2756,13 @@ else
   ac_cv_c_tklib="-l$installedtklibroot"
 else
 cat > conftest.$ac_ext <<EOF
-#line 2723 "configure"
+#line 2760 "configure"
 #include "confdefs.h"
 
        Tcl_AppInit()
        { exit(0); }
 EOF
-{ (eval echo configure:2729: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }
+{ (eval echo configure:2766: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }
 if test -s conftest && (./conftest; exit) 2>/dev/null; then
   ac_cv_c_tklib="-l$installedtklibroot"
 else
@@ -2766,7 +2803,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-ldl  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 2770 "configure"
+#line 2807 "configure"
 #include "confdefs.h"
 
 int main() { return 0; }
@@ -2774,7 +2811,7 @@ int t() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:2778: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
+if { (eval echo configure:2815: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -2804,7 +2841,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-ldld  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 2808 "configure"
+#line 2845 "configure"
 #include "confdefs.h"
 
 int main() { return 0; }
@@ -2812,7 +2849,7 @@ int t() {
 main()
 ; return 0; }
 EOF
-if { (eval echo configure:2816: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
+if { (eval echo configure:2853: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; }; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
diff --git a/gdb/configure.in b/gdb/configure.in
index f67b3aa..a4c50f1 100644
--- a/gdb/configure.in
+++ b/gdb/configure.in
@@ -41,20 +41,20 @@ AC_CHECK_HEADERS(limits.h memory.h string.h strings.h unistd.h termios.h termio.
 AC_HEADER_STAT
 
 AC_MSG_CHECKING([for gregset_t type])
-AC_CACHE_VAL(gdb_have_gregset_t,
+AC_CACHE_VAL(gdb_cv_have_gregset_t,
 [AC_TRY_LINK([#include <sys/procfs.h>],[gregset_t *gregsetp = 0],
-gdb_have_gregset_t=yes, gdb_have_gregset_t=no)])
-AC_MSG_RESULT($gdb_have_gregset_t)
-if test $gdb_have_gregset_t = yes; then
+gdb_cv_have_gregset_t=yes, gdb_cv_have_gregset_t=no)])
+AC_MSG_RESULT($gdb_cv_have_gregset_t)
+if test $gdb_cv_have_gregset_t = yes; then
   AC_DEFINE(HAVE_GREGSET_T)
 fi
 
 AC_MSG_CHECKING([for fpregset_t type])
-AC_CACHE_VAL(gdb_have_fpregset_t,
+AC_CACHE_VAL(gdb_cv_have_fpregset_t,
 [AC_TRY_LINK([#include <sys/procfs.h>],[fpregset_t *fpregsetp = 0],
-gdb_have_fpregset_t=yes, gdb_have_fpregset_t=no)])
-AC_MSG_RESULT($gdb_have_fpregset_t)
-if test $gdb_have_fpregset_t = yes; then
+gdb_cv_have_fpregset_t=yes, gdb_cv_have_fpregset_t=no)])
+AC_MSG_RESULT($gdb_cv_have_fpregset_t)
+if test $gdb_cv_have_fpregset_t = yes; then
   AC_DEFINE(HAVE_FPREGSET_T)
 fi
 
@@ -62,7 +62,7 @@ dnl See if compiler supports "long double" type.  Can't use AC_C_LONG_DOUBLE
 dnl because autoconf complains about cross-compilation issues.  However, this
 dnl code uses the same variables as the macro for compatibility.
 
-AC_MSG_CHECKING(for long double)
+AC_MSG_CHECKING(for long double support in compiler)
 AC_CACHE_VAL(ac_cv_c_long_double,
 [AC_TRY_COMPILE(, [long double foo;],
 ac_cv_c_long_double=yes, ac_cv_c_long_double=no)])
@@ -71,6 +71,25 @@ if test $ac_cv_c_long_double = yes; then
   AC_DEFINE(HAVE_LONG_DOUBLE)
 fi
 
+dnl See if the compiler and runtime support printing long doubles
+
+AC_MSG_CHECKING(for long double support in printf)
+AC_CACHE_VAL(gdb_cv_printf_has_long_double,
+[AC_TRY_RUN([
+int main () {
+  char buf[16];
+  long double f = 3.141592653;
+  sprintf (buf, "%Lg", f);
+  return (strncmp ("3.14159", buf, 7));
+}],
+gdb_cv_printf_has_long_double=yes,
+gdb_cv_printf_has_long_double=no,
+gdb_cv_printf_has_long_double=no)])
+if test $gdb_cv_printf_has_long_double = yes; then
+  AC_DEFINE(PRINTF_HAS_LONG_DOUBLE)
+fi
+AC_MSG_RESULT($gdb_cv_printf_has_long_double)
+
 AC_FUNC_MMAP
 
 dnl Handle optional features that can be enabled.