[PATCH 06/16] gdb: don't check for long double support

[Simon Marchi <simon.marchi@efficios.com>]

Nothing uses HAVE_LONG_DOUBLE, PRINTF_HAS_LONG_DOUBLE or
SCANF_HAS_LONG_DOUBLE.  Remove the checks from configure.ac.

Regenerate config.in and configure.

Change-Id: Ie2ea3ee02bf930cfba13f98498c7fbe24cc14ad3
---
 gdb/config.in    |   9 ----
 gdb/configure    | 113 -----------------------------------------------
 gdb/configure.ac |  49 --------------------
 3 files changed, 171 deletions(-)

diff --git a/gdb/config.in b/gdb/config.in
index 636daea082d3..0f0afa6f26b0 100644
--- a/gdb/config.in
+++ b/gdb/config.in
@@ -306,9 +306,6 @@
 /* Define to 1 if you have the <locale.h> header file. */
 #undef HAVE_LOCALE_H
 
-/* Define to 1 if the compiler supports long double. */
-#undef HAVE_LONG_DOUBLE
-
 /* Define to 1 if the system has the type `long long'. */
 #undef HAVE_LONG_LONG
 
@@ -650,9 +647,6 @@
 /* Define to 1 if the "%H, %D and %DD" formats work to print decfloats. */
 #undef PRINTF_HAS_DECFLOAT
 
-/* Define to 1 if the "%Lg" format works to print long doubles. */
-#undef PRINTF_HAS_LONG_DOUBLE
-
 /* Define to 1 if the "%ll" format works to print long longs. */
 #undef PRINTF_HAS_LONG_LONG
 
@@ -691,9 +685,6 @@
 /* Bug reporting address */
 #undef REPORT_BUGS_TO
 
-/* Define to 1 if the "%Lg" format works to scan long doubles. */
-#undef SCANF_HAS_LONG_DOUBLE
-
 /* Define to 1 if the `setpgrp' function takes no argument. */
 #undef SETPGRP_VOID
 
diff --git a/gdb/configure b/gdb/configure
index 4c08ab956555..1f35d4e42f52 100755
--- a/gdb/configure
+++ b/gdb/configure
@@ -30529,119 +30529,6 @@ $as_echo "#define PRINTF_HAS_DECFLOAT 1" >>confdefs.h
 
 fi
 
-# Check if the compiler supports the `long double' type.  We can't use
-# AC_C_LONG_DOUBLE because that one does additional checks on the
-# constants defined in <float.h> that fail on some systems,
-# e.g. FreeBSD/i386 4.7 and OpenBSD/i386 3.6.
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for long double support in compiler" >&5
-$as_echo_n "checking for long double support in compiler... " >&6; }
-if ${gdb_cv_c_long_double+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-long double foo;
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  gdb_cv_c_long_double=yes
-else
-  gdb_cv_c_long_double=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gdb_cv_c_long_double" >&5
-$as_echo "$gdb_cv_c_long_double" >&6; }
-if test "$gdb_cv_c_long_double" = yes; then
-
-$as_echo "#define HAVE_LONG_DOUBLE 1" >>confdefs.h
-
-fi
-
-# Check if the compiler and runtime support printing long doubles.
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for long double support in printf" >&5
-$as_echo_n "checking for long double support in printf... " >&6; }
-if ${gdb_cv_printf_has_long_double+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test "$cross_compiling" = yes; then :
-  gdb_cv_printf_has_long_double=no
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$ac_includes_default
-int
-main ()
-{
-char buf[16];
-  long double f = 3.141592653;
-  sprintf (buf, "%Lg", f);
-  return (strncmp ("3.14159", buf, 7));
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-  gdb_cv_printf_has_long_double=yes
-else
-  gdb_cv_printf_has_long_double=no
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
-  conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gdb_cv_printf_has_long_double" >&5
-$as_echo "$gdb_cv_printf_has_long_double" >&6; }
-if test "$gdb_cv_printf_has_long_double" = yes; then
-
-$as_echo "#define PRINTF_HAS_LONG_DOUBLE 1" >>confdefs.h
-
-fi
-
-# Check if the compiler and runtime support scanning long doubles.
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for long double support in scanf" >&5
-$as_echo_n "checking for long double support in scanf... " >&6; }
-if ${gdb_cv_scanf_has_long_double+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test "$cross_compiling" = yes; then :
-  gdb_cv_scanf_has_long_double=no
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <stdio.h>
-int
-main ()
-{
-char *buf = "3.141592653";
-  long double f = 0;
-  sscanf (buf, "%Lg", &f);
-  return !(f > 3.14159 && f < 3.14160);
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-  gdb_cv_scanf_has_long_double=yes
-else
-  gdb_cv_scanf_has_long_double=no
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
-  conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gdb_cv_scanf_has_long_double" >&5
-$as_echo "$gdb_cv_scanf_has_long_double" >&6; }
-if test "$gdb_cv_scanf_has_long_double" = yes; then
-
-$as_echo "#define SCANF_HAS_LONG_DOUBLE 1" >>confdefs.h
-
-fi
-
 case ${host_os} in
 aix*)
   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -bbigtoc option" >&5
diff --git a/gdb/configure.ac b/gdb/configure.ac
index b234a77c0581..6545320b7b96 100644
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -1721,55 +1721,6 @@ if test "$gdb_cv_printf_has_decfloat" = yes; then
 	    [Define to 1 if the "%H, %D and %DD" formats work to print decfloats.])
 fi
 
-# Check if the compiler supports the `long double' type.  We can't use
-# AC_C_LONG_DOUBLE because that one does additional checks on the
-# constants defined in <float.h> that fail on some systems,
-# e.g. FreeBSD/i386 4.7 and OpenBSD/i386 3.6.
-
-AC_CACHE_CHECK([for long double support in compiler], gdb_cv_c_long_double,
-	       [AC_COMPILE_IFELSE([AC_LANG_SOURCE([[long double foo;]])],
-				  gdb_cv_c_long_double=yes,
-				  gdb_cv_c_long_double=no)])
-if test "$gdb_cv_c_long_double" = yes; then
-  AC_DEFINE(HAVE_LONG_DOUBLE, 1,
-	   [Define to 1 if the compiler supports long double.])
-fi
-
-# Check if the compiler and runtime support printing long doubles.
-
-AC_CACHE_CHECK([for long double support in printf],
-	       gdb_cv_printf_has_long_double,
-	       [AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],
-[[char buf[16];
-  long double f = 3.141592653;
-  sprintf (buf, "%Lg", f);
-  return (strncmp ("3.14159", buf, 7));]])],
-			      gdb_cv_printf_has_long_double=yes,
-			      gdb_cv_printf_has_long_double=no,
-			      gdb_cv_printf_has_long_double=no)])
-if test "$gdb_cv_printf_has_long_double" = yes; then
-  AC_DEFINE(PRINTF_HAS_LONG_DOUBLE, 1,
-	    [Define to 1 if the "%Lg" format works to print long doubles.])
-fi
-
-# Check if the compiler and runtime support scanning long doubles.
-
-AC_CACHE_CHECK([for long double support in scanf],
-	       gdb_cv_scanf_has_long_double,
-	       [AC_RUN_IFELSE([AC_LANG_PROGRAM(
-[[#include <stdio.h>]],
-[[char *buf = "3.141592653";
-  long double f = 0;
-  sscanf (buf, "%Lg", &f);
-  return !(f > 3.14159 && f < 3.14160);]])],
-			      gdb_cv_scanf_has_long_double=yes,
-			      gdb_cv_scanf_has_long_double=no,
-			      gdb_cv_scanf_has_long_double=no)])
-if test "$gdb_cv_scanf_has_long_double" = yes; then
-  AC_DEFINE(SCANF_HAS_LONG_DOUBLE, 1,
-	    [Define to 1 if the "%Lg" format works to scan long doubles.])
-fi
-
 case ${host_os} in
 aix*)
   AC_CACHE_CHECK(
-- 
2.56.0