Linux: Access memory even if threads are running

[deliverable/binutils-gdb.git] / gdb / acinclude.m4

diff --git a/gdb/acinclude.m4 b/gdb/acinclude.m4
index a557d6bc8666a680a319d6745e3843981c4c4152..2bdc1cedc262e8a47b1f3adbdb41d182f2322633 100644 (file)
--- a/gdb/acinclude.m4
+++ b/gdb/acinclude.m4
@@ -4,6 +4,12 @@ dnl major rewriting for Tcl 7.5 by Don Libes <libes@nist.gov>
 # Keep these includes in sync with the aclocal_m4_deps list in
 # Makefile.in.
 
+dnl NB: When possible, try to avoid explicit includes of ../config/ files.
+dnl They're normally found by aclocal automatically and recorded in aclocal.m4.
+dnl However, some are kept here explicitly to silence harmless warnings from
+dnl aclocal when it finds AM_xxx macros via local search paths instead of
+dnl system search paths.
+
 m4_include(acx_configure_dir.m4)
 
 # This gets GDB_AC_TRANSFORM.
@@ -21,47 +27,16 @@ m4_include(../gdbsupport/selftest.m4)
 dnl gdb/configure.in uses BFD_NEED_DECLARATION, so get its definition.
 m4_include(../bfd/bfd.m4)
 
-dnl This gets the standard macros.
-m4_include(../config/acinclude.m4)
-
-dnl This gets GCC_ENABLE.
-sinclude(../config/enable.m4)
-
-dnl This gets AC_PLUGINS, needed by ACX_LARGEFILE.
-m4_include(../config/plugins.m4)
-
-dnl For ACX_LARGEFILE.
-m4_include(../config/largefile.m4)
-
-dnl For AM_SET_LEADING_DOT.
-m4_include(../config/lead-dot.m4)
-
-dnl This gets autoconf bugfixes.
-m4_include(../config/override.m4)
-
-dnl For ZW_GNU_GETTEXT_SISTER_DIR.
-m4_include(../config/gettext-sister.m4)
-
-dnl For AC_LIB_HAVE_LINKFLAGS.
-m4_include(../config/lib-ld.m4)
-m4_include(../config/lib-prefix.m4)
-m4_include(../config/lib-link.m4)
-
-dnl For ACX_PKGVERSION and ACX_BUGURL.
-m4_include(../config/acx.m4)
-
-dnl for TCL definitions
-m4_include(../config/tcl.m4)
-
-dnl For dependency tracking macros.
-m4_include([../config/depstand.m4])
-
 dnl For AM_LC_MESSAGES
 m4_include([../config/lcmessage.m4])
 
 dnl For AM_LANGINFO_CODESET.
 m4_include([../config/codeset.m4])
 
+dnl We need to explicitly include these before iconv.m4 to avoid warnings.
+m4_include([../config/lib-ld.m4])
+m4_include([../config/lib-prefix.m4])
+m4_include([../config/lib-link.m4])
 m4_include([../config/iconv.m4])
 
 m4_include([../config/zlib.m4])
@@ -76,8 +51,6 @@ m4_include(../gdbsupport/ptrace.m4)
 
 m4_include(ax_cxx_compile_stdcxx.m4)
 
-m4_include([../config/ax_pthread.m4])
-
 dnl written by Guido Draheim <guidod@gmx.de>, original by Alexandre Oliva 
 dnl Version 1.3 (2001/03/02)
 dnl source http://www.gnu.org/software/ac-archive/Miscellaneous/ac_define_dir.html
@@ -98,13 +71,22 @@ dnl to use a different cache variable name in this macro if it is invoked
 dnl in a different context somewhere else.
 dnl gcc_AC_CHECK_DECL(SYMBOL,
 dnl    [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND [, INCLUDES]]])
-AC_DEFUN([gcc_AC_CHECK_DECL],
-[AC_MSG_CHECKING([whether $1 is declared])
-AC_CACHE_VAL(gcc_cv_have_decl_$1,
-[AC_TRY_COMPILE([$4],
-[#ifndef $1
-char *(*pfn) = (char *(*)) $1 ;
-#endif], eval "gcc_cv_have_decl_$1=yes", eval "gcc_cv_have_decl_$1=no")])
+AC_DEFUN(
+  [gcc_AC_CHECK_DECL],
+  [AC_MSG_CHECKING([whether $1 is declared])
+   AC_CACHE_VAL(
+     [gcc_cv_have_decl_$1],
+     [AC_COMPILE_IFELSE(
+       [AC_LANG_PROGRAM(
+          [$4],
+          [#ifndef $1
+           char *(*pfn) = (char *(*)) $1 ;
+           #endif]
+        )],
+       [eval "gcc_cv_have_decl_$1=yes"],
+       [eval "gcc_cv_have_decl_$1=no"]
+      )]
+   )
 if eval "test \"`echo '$gcc_cv_have_decl_'$1`\" = yes"; then
   AC_MSG_RESULT(yes) ; ifelse([$2], , :, [$2])
 else
@@ -159,7 +141,7 @@ AC_DEFUN([CY_AC_TCL_PRIVATE_HEADERS], [
   fi
 
   if test x"${private_dir}" = x; then
-    AC_ERROR(could not find private Tcl headers)
+    AC_MSG_ERROR(could not find private Tcl headers)
   else
     TCL_PRIVATE_INCLUDE="-I${private_dir}"
     AC_MSG_RESULT(${private_dir})
@@ -180,7 +162,7 @@ AC_DEFUN([CY_AC_TK_PRIVATE_HEADERS], [
   fi
 
   if test x"${private_dir}" = x; then
-    AC_ERROR(could not find Tk private headers)
+    AC_MSG_ERROR(could not find Tk private headers)
   else
     TK_PRIVATE_INCLUDE="-I${private_dir}"
     AC_MSG_RESULT(${private_dir})
@@ -251,13 +233,21 @@ AC_DEFUN([GDB_AC_CHECK_BFD], [
   LDFLAGS="-L../bfd -L../libiberty $ZLIBDIR $LDFLAGS"
   intl=`echo $LIBINTL | sed 's,${top_builddir}/,,g'`
   LIBS="-lbfd -liberty -lz $intl $LIBS"
-  AC_CACHE_CHECK([$1], [$2],
-  [AC_TRY_LINK(
-  [#include <stdlib.h>
-  #include "bfd.h"
-  #include "$4"
-  ],
-  [return $3;], [[$2]=yes], [[$2]=no])])
+  AC_CACHE_CHECK(
+    [$1],
+    [$2],
+    [AC_LINK_IFELSE(
+       [AC_LANG_PROGRAM(
+         [#include <stdlib.h>
+          #include <string.h>
+          #include "bfd.h"
+          #include "$4"],
+         [return $3;]
+       )],
+       [[$2]=yes],
+       [[$2]=no]
+     )]
+  )
   CFLAGS=$OLD_CFLAGS
   LDFLAGS=$OLD_LDFLAGS
   LIBS=$OLD_LIBS])