symtab.c: Add cast

[deliverable/binutils-gdb.git] / gdb / configure.ac

diff --git a/gdb/configure.ac b/gdb/configure.ac
index a40860ad4327728c289cc22810f6bae50fb0bb05..29d0b63889ac3e881d661d07c7ef0de834065984 100644 (file)
--- a/gdb/configure.ac
+++ b/gdb/configure.ac
@@ -1252,6 +1252,20 @@ if test "${with_intel_pt}" = no; then
   AC_MSG_WARN([Intel(R) Processor Trace support disabled; some features may be unavailable.])
   HAVE_LIBIPT=no
 else
+  AC_PREPROC_IFELSE(AC_LANG_SOURCE([[
+#include <linux/perf_event.h>
+#ifndef PERF_ATTR_SIZE_VER5
+# error
+#endif
+  ]]), [perf_event=yes], [perf_event=no])
+  if test "$perf_event" != yes; then
+    if test "$with_intel_pt" = yes; then
+      AC_MSG_ERROR([linux/perf_event.h missing or too old])
+    else
+      AC_MSG_WARN([linux/perf_event.h missing or too old; some features may be unavailable.])
+    fi
+  fi
+
   AC_LIB_HAVE_LINKFLAGS([ipt], [], [#include "intel-pt.h"], [pt_insn_alloc_decoder (0);])
   if test "$HAVE_LIBIPT" != yes; then
     if test "$with_intel_pt" = yes; then
@@ -1325,7 +1339,6 @@ AC_CHECK_MEMBERS([struct stat.st_blocks, struct stat.st_blksize])
 # Checks for types.  #
 # ------------------ #
 
-AC_TYPE_SIGNAL
 AC_CHECK_TYPES(socklen_t, [], [],
 [#include <sys/types.h>
 #include <sys/socket.h>
@@ -1355,75 +1368,8 @@ AC_CHECK_FUNCS([getauxval getrusage getuid getgid \
 AM_LANGINFO_CODESET
 GDB_AC_COMMON
 
-# Check the return and argument types of ptrace.  No canned test for
-# this, so roll our own.
-gdb_ptrace_headers='
-#include <sys/types.h>
-#if HAVE_SYS_PTRACE_H
-# include <sys/ptrace.h>
-#endif
-#if HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-'
-# There is no point in checking if we don't have a prototype.
-AC_CHECK_DECLS(ptrace, [], [
-  : ${gdb_cv_func_ptrace_ret='int'}
-  : ${gdb_cv_func_ptrace_args='int,int,long,long'}
-], $gdb_ptrace_headers)
-# Check return type.  Varargs (used on GNU/Linux) conflict with the
-# empty argument list, so check for that explicitly.
-AC_CACHE_CHECK([return type of ptrace], gdb_cv_func_ptrace_ret,
-  AC_TRY_COMPILE($gdb_ptrace_headers,
-    [extern long ptrace (enum __ptrace_request, ...);],
-    gdb_cv_func_ptrace_ret='long',
-    AC_TRY_COMPILE($gdb_ptrace_headers,
-      [extern int ptrace ();],
-      gdb_cv_func_ptrace_ret='int',
-      gdb_cv_func_ptrace_ret='long')))
-AC_DEFINE_UNQUOTED(PTRACE_TYPE_RET, $gdb_cv_func_ptrace_ret,
-  [Define as the return type of ptrace.])
-# Check argument types.
-AC_CACHE_CHECK([types of arguments for ptrace], gdb_cv_func_ptrace_args, [
-  AC_TRY_COMPILE($gdb_ptrace_headers,
-    [extern long ptrace (enum __ptrace_request, ...);],
-    [gdb_cv_func_ptrace_args='int,int,long,long'],[
-for gdb_arg1 in 'int' 'long'; do
- for gdb_arg2 in 'pid_t' 'int' 'long'; do
-  for gdb_arg3 in 'int *' 'caddr_t' 'int' 'long' 'void *'; do
-   for gdb_arg4 in 'int' 'long' 'void *'; do
-     AC_TRY_COMPILE($gdb_ptrace_headers, [
-extern $gdb_cv_func_ptrace_ret
-  ptrace ($gdb_arg1, $gdb_arg2, $gdb_arg3, $gdb_arg4);
-], [gdb_cv_func_ptrace_args="$gdb_arg1,$gdb_arg2,$gdb_arg3,$gdb_arg4";
-    break 4;])
-    for gdb_arg5 in 'int *' 'int' 'long'; do
-     AC_TRY_COMPILE($gdb_ptrace_headers, [
-extern $gdb_cv_func_ptrace_ret
-  ptrace ($gdb_arg1, $gdb_arg2, $gdb_arg3, $gdb_arg4, $gdb_arg5);
-], [
-gdb_cv_func_ptrace_args="$gdb_arg1,$gdb_arg2,$gdb_arg3,$gdb_arg4,$gdb_arg5";
-    break 5;])
-    done
-   done
-  done
- done
-done
-# Provide a safe default value.
-: ${gdb_cv_func_ptrace_args='int,int,long,long'}
-])])
-ac_save_IFS=$IFS; IFS=','
-set dummy `echo "$gdb_cv_func_ptrace_args" | sed 's/\*/\*/g'`
-IFS=$ac_save_IFS
-shift
-AC_DEFINE_UNQUOTED(PTRACE_TYPE_ARG3, $[3],
-  [Define to the type of arg 3 for ptrace.])
-AC_DEFINE_UNQUOTED(PTRACE_TYPE_ARG4, $[4],
-  [Define to the type of arg 4 for ptrace.])
-if test -n "$[5]"; then
-  AC_DEFINE_UNQUOTED(PTRACE_TYPE_ARG5, $[5],
-    [Define to the type of arg 5 for ptrace.])
-fi
+# Check the return and argument types of ptrace.
+GDB_AC_PTRACE
 
 dnl AC_FUNC_SETPGRP does not work when cross compiling
 dnl Instead, assume we will have a prototype for setpgrp if cross compiling.