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[PATCH] Autconf test for ptrace
- From: Mark Kettenis <kettenis at chello dot nl>
- To: gdb-patches at sources dot redhat dot com
- Date: Mon, 9 Aug 2004 21:19:05 +0200 (CEST)
- Subject: [PATCH] Autconf test for ptrace
As discussed on gdb@.
Committed,
Mark
Index: ChangeLog
from Mark Kettenis <kettenis@gnu.org>
* configure.in: Check for <sys/types.h>. Check return and
argument types of ptrace.
* configure, config.in: Regenerate.
Index: configure.in
===================================================================
RCS file: /cvs/src/src/gdb/configure.in,v
retrieving revision 1.162
diff -u -p -r1.162 configure.in
--- configure.in 7 Aug 2004 22:12:08 -0000 1.162
+++ configure.in 9 Aug 2004 19:17:55 -0000
@@ -413,6 +413,7 @@ AC_CHECK_HEADERS(sys/ptrace.h ptrace.h)
AC_CHECK_HEADERS(sys/reg.h sys/debugreg.h)
AC_CHECK_HEADERS(sys/select.h)
AC_CHECK_HEADERS(sys/syscall.h)
+AC_CHECK_HEADERS(sys/types.h)
AC_CHECK_HEADERS(sys/user.h)
AC_CHECK_HEADERS(sys/wait.h wait.h)
AC_CHECK_HEADERS(termios.h termio.h sgtty.h)
@@ -447,6 +448,7 @@ AC_MSG_RESULT($gdb_cv_have_struct_stat_w
if test $gdb_cv_have_struct_stat_with_st_blocks_member = yes; then
AC_DEFINE(HAVE_STRUCT_STAT_ST_BLOCKS)
fi
+
# ------------------------- #
# Checks for declarations. #
# ------------------------- #
@@ -482,6 +484,69 @@ AC_CHECK_FUNCS(sigaction sigprocmask sig
AC_CHECK_FUNCS(socketpair)
AC_CHECK_FUNCS(syscall)
+# Check the return and argument types of ptrace. No canned test for
+# this, so roll our own.
+gdb_ptrace_headers='
+#if HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#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.
+gcc_AC_CHECK_DECLS(ptrace, , [
+ : ${gdb_cv_func_ptrace_ret='int'}
+ : ${gdb_cv_func_ptrace_args='int,int,long,long'}
+], $gdb_ptrace_headers)
+# Check return type.
+AC_CACHE_CHECK([return type of ptrace], gdb_cv_func_ptrace_ret,
+ AC_TRY_COMPILE($gdb_ptrace_headers,
+ [extern long ptrace ();],
+ gdb_cv_func_ptrace_ret='long',
+ gdb_cv_func_ptrace_ret='int'))
+AC_DEFINE_UNQUOTED(PTRACE_TYPE_RET, $gdb_cv_func_ptrace_ret,
+ [Define as the return type of ptrace.])
+# Check argument types.
+AC_CACHE_CHECK([types of arguments for ptrace], gdb_cv_func_ptrace_args, [
+for gdb_arg1 in 'int' 'long'; do
+ for gdb_arg2 in 'pid_t' 'int' 'long'; do
+ for gdb_arg3 in 'int *' 'caddr_t' 'int' 'long'; do
+ for gdb_arg4 in 'int' 'long'; do
+ AC_TRY_COMPILE($gdb_ptrace_headers, [
+extern $gdb_cv_func_ptrace_ret
+ ptrace ($gdb_arg1, $gdb_arg2, $gdb_arg3, $gdb_arg4);
+], [gdb_cv_func_ptrace_args="$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, ($[3]),
+ [Define to the type of arg 3 for ptrace.])
+if test -n "$[5]"; then
+ AC_DEFINE_UNQUOTED(PTRACE_TYPE_ARG5, ($[5]),
+ [Define to the type of arg 5 for ptrace.])
+fi
+
dnl AC_FUNC_SETPGRP does not work when cross compiling
dnl Instead, assume we will have a prototype for setpgrp if cross compiling.
if test "$cross_compiling" = no; then