dnl Copyright (C) 2012-2015 Free Software Foundation, Inc. dnl dnl This file is part of GDB. dnl dnl This program is free software; you can redistribute it and/or modify dnl it under the terms of the GNU General Public License as published by dnl the Free Software Foundation; either version 3 of the License, or dnl (at your option) any later version. dnl dnl This program is distributed in the hope that it will be useful, dnl but WITHOUT ANY WARRANTY; without even the implied warranty of dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the dnl GNU General Public License for more details. dnl dnl You should have received a copy of the GNU General Public License dnl along with this program. If not, see <http://www.gnu.org/licenses/>. dnl Check the return and argument types of ptrace. AC_DEFUN([GDB_AC_PTRACE], [ AC_CHECK_HEADERS([sys/ptrace.h ptrace.h]) # Needs to be tested in C++ mode, to detect whether we need to cast # the first argument to enum __ptrace_request. if test "$enable_build_with_cxx" = "yes"; then AC_LANG_PUSH([C++]) fi 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='enum __ptrace_request,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_ARG1, $[1], [Define to the type of arg 1 for ptrace.]) 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, $[5], [Define to the type of arg 5 for ptrace.]) fi if test "$enable_build_with_cxx" = "yes"; then AC_LANG_POP([C++]) fi ])