gdbserver: modernize configure.ac

Run autoupdate on gdbserver/configure.ac and then tweak it to use easier
to read indentation.  This removes a few warnings when running
`autoreconf -vf -Wall`.

  * Replace AC_INIT with AC_INIT and no arguments plus AC_CONFIG_SRCDIR.
  * Replace AC_GNU_SOURCE with AC_USE_SYSTEM_EXTENSIONS.
  * Replace AC_TRY_COMPILE with AC_COMPILE_IFELSE.
  * Replace AC_TRY_LINK with AC_LINK_IFELSE.

autoupdate gets it right, except this one here:

    --- a/gdbserver/configure.ac
    +++ b/gdbserver/configure.ac
    @@ -304,7 +304,7 @@ if test "$srv_linux_thread_db" = "yes"; then
         AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],[found="-Wl,--dynamic-list"
                     RDYNAMIC='-Wl,--dynamic-list=$(srcdir)/proc-service.list'],[RDYNAMIC="-rdynamic"
                     LDFLAGS="$old_LDFLAGS $RDYNAMIC"
    -                AC_TRY_LINK([], [],
    +                _au_m4_changequote([,])AC_TRY_LINK([], [],
                                 [found="-rdynamic"],
                                 [found="no"
                                  RDYNAMIC=""])])

... which I had to convert manually.

The changes in the generated configure file only contain insignificant
whitespace changes, so that gives confidence that the conversion is
correct.

gdbserver/ChangeLog:

	* configure.ac: Modernize.
	* configure: Re-generate.

Change-Id: Ia769aaec2aafac595504f477da955e91dffa4d8f

1 files changed, 24 insertions, 9 deletions

diff --git a/gdbserver/configure b/gdbserver/configure
index 4b7ef288d06..c91ce71c943 100755
--- a/gdbserver/configure
+++ b/gdbserver/configure
@@ -2713,6 +2713,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
 
+
 ac_config_headers="$ac_config_headers config.h:config.in"
 
 
@@ -4245,7 +4246,6 @@ $as_echo "$ac_cv_safe_to_define___extensions__" >&6; }
   $as_echo "#define _TANDEM_SOURCE 1" >>confdefs.h
 
 
-
 # Check whether --enable-largefile was given.
 if test "${enable_largefile+set}" = set; then :
   enableval=$enable_largefile;
@@ -9653,6 +9653,7 @@ int
 main ()
 {
 
+
   ;
   return 0;
 }
@@ -9660,11 +9661,14 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"; then :
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; };
+
 $as_echo "#define HAVE_UST 1" >>confdefs.h
 
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }; ustlibs= ; ustinc=
+$as_echo "no" >&6; }
+     ustlibs= ; ustinc=
+
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
   CFLAGS="$saved_CFLAGS"
@@ -10314,8 +10318,10 @@ if ac_fn_c_try_compile "$LINENO"; then :
   gdbsrv_cv_have_ptrace_getregs=yes
 else
   gdbsrv_cv_have_ptrace_getregs=no
+
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
 fi
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gdbsrv_cv_have_ptrace_getregs" >&5
@@ -10346,8 +10352,10 @@ if ac_fn_c_try_compile "$LINENO"; then :
   gdbsrv_cv_have_ptrace_getfpxregs=yes
 else
   gdbsrv_cv_have_ptrace_getfpxregs=no
+
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
 fi
 
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gdbsrv_cv_have_ptrace_getfpxregs" >&5
@@ -10513,11 +10521,11 @@ main ()
 _ACEOF
 if ac_fn_c_try_link "$LINENO"; then :
   found="-Wl,--dynamic-list"
-		 RDYNAMIC='-Wl,--dynamic-list=$(srcdir)/proc-service.list'
+       RDYNAMIC='-Wl,--dynamic-list=$(srcdir)/proc-service.list'
 else
   RDYNAMIC="-rdynamic"
-		 LDFLAGS="$old_LDFLAGS $RDYNAMIC"
-		 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+       LDFLAGS="$old_LDFLAGS $RDYNAMIC"
+       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -10532,10 +10540,12 @@ if ac_fn_c_try_link "$LINENO"; then :
   found="-rdynamic"
 else
   found="no"
-			      RDYNAMIC=""
+	  RDYNAMIC=""
+
 fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
+
 fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
@@ -10571,8 +10581,10 @@ if ac_fn_c_try_compile "$LINENO"; then :
   gdbsrv_cv_have_td_version=yes
 else
   gdbsrv_cv_have_td_version=no
+
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gdbsrv_cv_have_td_version" >&5
 $as_echo "$gdbsrv_cv_have_td_version" >&6; }
@@ -10619,14 +10631,15 @@ $as_echo_n "checking whether the target supports __sync_*_compare_and_swap... "
 if ${gdbsrv_cv_have_sync_builtins+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
 main ()
 {
-int foo, bar; bar = __sync_val_compare_and_swap(&foo, 0, 1);
+int foo, bar;
+	 bar = __sync_val_compare_and_swap(&foo, 0, 1);
+
   ;
   return 0;
 }
@@ -10635,9 +10648,11 @@ if ac_fn_c_try_link "$LINENO"; then :
   gdbsrv_cv_have_sync_builtins=yes
 else
   gdbsrv_cv_have_sync_builtins=no
+
 fi
 rm -f core conftest.err conftest.$ac_objext \
     conftest$ac_exeext conftest.$ac_ext
+
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gdbsrv_cv_have_sync_builtins" >&5
 $as_echo "$gdbsrv_cv_have_sync_builtins" >&6; }