Include alloca.h unconditionally

Since gnulib alloca module was imported, we can include alloca.h in
both gdb and gdbserver unconditionally, so this patch adds inclusion
of alloca.h in common-defs.h.  This patch also removes AC_FUNC_ALLOCA
in configure.ac because we don't need to check alloca any more.

This patch below is removed in fact.

  [RFA/commit] include alloca.h if available.
  https://www.sourceware.org/ml/gdb-patches/2010-08/msg00566.html

Since alloca.h is from gnulib now, we don't have to check malloc.h in
configure and include malloc.h in code.  This patch also remove them
too.

gdb:

2014-11-21  Yao Qi  <yao@codesourcery.com>

	* common/common-defs.h: Include alloca.h
	* configure.ac: Don't invoke AC_FUNC_ALLOCA.
	* configure: Re-generated.
	* defs.h: Remove code handling alloca.
	* utils.c (gdb_realpath): Don't check HAVE_ALLOCA is defined
	or not.

gdb/gdbserver:

2014-11-21  Yao Qi  <yao@codesourcery.com>

	* configure.ac: Don't invoke AC_FUNC_ALLOCA.
	(AC_CHECK_HEADERS): Remove malloc.h.
	* configure: Re-generated.
	* config.in: Re-generated.
	* server.h: Don't include alloca.h and malloc.h.
	* gdbreplay.c: Don't check HAVE_ALLOCA_H is defined.
	Don't include malloc.h.

1 files changed, 2 insertions, 193 deletions

diff --git a/gdb/gdbserver/configure b/gdb/gdbserver/configure
index 9495905..2266617 100755
--- a/gdb/gdbserver/configure
+++ b/gdb/gdbserver/configure
@@ -605,6 +605,7 @@ WERROR_CFLAGS
 WARN_CFLAGS
 ustinc
 ustlibs
+ALLOCA
 SET_MAKE
 GMAKE_FALSE
 GMAKE_TRUE
@@ -614,7 +615,6 @@ DEPDIR
 am__leading_dot
 host_noncanonical
 target_noncanonical
-ALLOCA
 RANLIB
 AR
 INSTALL_DATA
@@ -4225,197 +4225,6 @@ $as_echo "#define STDC_HEADERS 1" >>confdefs.h
 fi
 
 
-# The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
-# for constant arguments.  Useless!
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for working alloca.h" >&5
-$as_echo_n "checking for working alloca.h... " >&6; }
-if test "${ac_cv_working_alloca_h+set}" = set; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <alloca.h>
-int
-main ()
-{
-char *p = (char *) alloca (2 * sizeof (int));
-			  if (p) return 0;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_working_alloca_h=yes
-else
-  ac_cv_working_alloca_h=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_working_alloca_h" >&5
-$as_echo "$ac_cv_working_alloca_h" >&6; }
-if test $ac_cv_working_alloca_h = yes; then
-
-$as_echo "#define HAVE_ALLOCA_H 1" >>confdefs.h
-
-fi
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for alloca" >&5
-$as_echo_n "checking for alloca... " >&6; }
-if test "${ac_cv_func_alloca_works+set}" = set; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#ifdef __GNUC__
-# define alloca __builtin_alloca
-#else
-# ifdef _MSC_VER
-#  include <malloc.h>
-#  define alloca _alloca
-# else
-#  ifdef HAVE_ALLOCA_H
-#   include <alloca.h>
-#  else
-#   ifdef _AIX
- #pragma alloca
-#   else
-#    ifndef alloca /* predefined by HP cc +Olibcalls */
-char *alloca ();
-#    endif
-#   endif
-#  endif
-# endif
-#endif
-
-int
-main ()
-{
-char *p = (char *) alloca (1);
-				    if (p) return 0;
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_func_alloca_works=yes
-else
-  ac_cv_func_alloca_works=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_func_alloca_works" >&5
-$as_echo "$ac_cv_func_alloca_works" >&6; }
-
-if test $ac_cv_func_alloca_works = yes; then
-
-$as_echo "#define HAVE_ALLOCA 1" >>confdefs.h
-
-else
-  # The SVR3 libPW and SVR4 libucb both contain incompatible functions
-# that cause trouble.  Some versions do not even contain alloca or
-# contain a buggy version.  If you still want to use their alloca,
-# use ar to extract alloca.o from them instead of compiling alloca.c.
-
-ALLOCA=\${LIBOBJDIR}alloca.$ac_objext
-
-$as_echo "#define C_ALLOCA 1" >>confdefs.h
-
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether \`alloca.c' needs Cray hooks" >&5
-$as_echo_n "checking whether \`alloca.c' needs Cray hooks... " >&6; }
-if test "${ac_cv_os_cray+set}" = set; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#if defined CRAY && ! defined CRAY2
-webecray
-#else
-wenotbecray
-#endif
-
-_ACEOF
-if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "webecray" >/dev/null 2>&1; then :
-  ac_cv_os_cray=yes
-else
-  ac_cv_os_cray=no
-fi
-rm -f conftest*
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_os_cray" >&5
-$as_echo "$ac_cv_os_cray" >&6; }
-if test $ac_cv_os_cray = yes; then
-  for ac_func in _getb67 GETB67 getb67; do
-    as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
-ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
-eval as_val=\$$as_ac_var
-   if test "x$as_val" = x""yes; then :
-
-cat >>confdefs.h <<_ACEOF
-#define CRAY_STACKSEG_END $ac_func
-_ACEOF
-
-    break
-fi
-
-  done
-fi
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking stack direction for C alloca" >&5
-$as_echo_n "checking stack direction for C alloca... " >&6; }
-if test "${ac_cv_c_stack_direction+set}" = set; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test "$cross_compiling" = yes; then :
-  ac_cv_c_stack_direction=0
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-$ac_includes_default
-int
-find_stack_direction ()
-{
-  static char *addr = 0;
-  auto char dummy;
-  if (addr == 0)
-    {
-      addr = &dummy;
-      return find_stack_direction ();
-    }
-  else
-    return (&dummy > addr) ? 1 : -1;
-}
-
-int
-main ()
-{
-  return find_stack_direction () < 0;
-}
-_ACEOF
-if ac_fn_c_try_run "$LINENO"; then :
-  ac_cv_c_stack_direction=1
-else
-  ac_cv_c_stack_direction=-1
-fi
-rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
-  conftest.$ac_objext conftest.beam conftest.$ac_ext
-fi
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_stack_direction" >&5
-$as_echo "$ac_cv_c_stack_direction" >&6; }
-cat >>confdefs.h <<_ACEOF
-#define STACK_DIRECTION $ac_cv_c_stack_direction
-_ACEOF
-
-
-fi
-
-
 # Set the 'development' global.
 . $srcdir/../../bfd/development.sh
 
@@ -4904,7 +4713,7 @@ $as_echo "$as_me: running $SHELL $ac_sub_configure $ac_sub_configure_args --cach
   cd "$ac_popdir"
 
 
-for ac_header in sgtty.h termio.h termios.h sys/reg.h string.h 		 proc_service.h sys/procfs.h linux/elf.h 		 fcntl.h signal.h sys/file.h malloc.h 		 sys/ioctl.h netinet/in.h sys/socket.h netdb.h 		 netinet/tcp.h arpa/inet.h
+for ac_header in sgtty.h termio.h termios.h sys/reg.h string.h 		 proc_service.h sys/procfs.h linux/elf.h 		 fcntl.h signal.h sys/file.h 		 sys/ioctl.h netinet/in.h sys/socket.h netdb.h 		 netinet/tcp.h arpa/inet.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
 ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"