# -*- shell-script -*-
#
# Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
# University Research and Technology
# Corporation. All rights reserved.
# Copyright (c) 2004-2005 The University of Tennessee and The University
# of Tennessee Research Foundation. All rights
# reserved.
# Copyright (c) 2004-2010 High Performance Computing Center Stuttgart,
# University of Stuttgart. All rights reserved.
# Copyright (c) 2004-2005 The Regents of the University of California.
# All rights reserved.
# Copyright (c) 2009 Oak Ridge National Labs. All rights reserved.
# Copyright (c) 2010-2013 Cisco Systems, Inc. All rights reserved.
# Copyright (c) 2013 Mellanox Technologies, Inc.
# All rights reserved.
# $COPYRIGHT$
#
# Additional copyrights may follow
#
# $HEADER$
#
#
# Search the generated warnings for
# keywords regarding skipping or ignoring certain attributes
# Intel: ignore
# Sun C++: skip
#
AC_DEFUN([_OPAL_ATTRIBUTE_FAIL_SEARCH],[
AC_REQUIRE([AC_PROG_GREP])
if test -s conftest.err ; then
# icc uses 'invalid attribute' and 'attribute "__XXX__" ignored'
# Sun 12.1 emits 'warning: attribute parameter "__printf__" is undefined'
for i in invalid ignore skip undefined ; do
$GREP -iq $i conftest.err
if test "$?" = "0" ; then
opal_cv___attribute__[$1]=0
break;
fi
done
fi
])
#
# Check for one specific attribute by compiling with C and C++
# and possibly using a cross-check.
#
# If the cross-check is defined, a static function "usage" should be
# defined, which is to be called from main (to circumvent warnings
# regarding unused function in main file)
# static int usage (int * argument);
#
# The last argument is for specific CFLAGS, that need to be set
# for the compiler to generate a warning on the cross-check.
# This may need adaption for future compilers / CFLAG-settings.
#
AC_DEFUN([_OPAL_CHECK_SPECIFIC_ATTRIBUTE], [
AC_MSG_CHECKING([for __attribute__([$1])])
AC_CACHE_VAL(opal_cv___attribute__[$1], [
#
# Try to compile using the C compiler, then C++
#
AC_TRY_COMPILE([$2],[],
[
#
# In case we did succeed: Fine, but was this due to the
# attribute being ignored/skipped? Grep for IgNoRe/skip in conftest.err
# and if found, reset the ompi_cv__attribute__var=0
#
opal_cv___attribute__[$1]=1
_OPAL_ATTRIBUTE_FAIL_SEARCH([$1])
],
[opal_cv___attribute__[$1]=0])
# Only test C++ if we're building Open MPI (i.e.,
# project_ompi). OPAL and ORTE do not use C++ at all, so
# let's not add a C++ compiler into their requirement list.
m4_ifdef([project_ompi],
[if test "$opal_cv___attribute__[$1]" = "1" ; then
AC_LANG_PUSH(C++)
AC_TRY_COMPILE([
extern "C" {
$2
}],[],
[
opal_cv___attribute__[$1]=1
_OPAL_ATTRIBUTE_FAIL_SEARCH([$1])
],[opal_cv___attribute__[$1]=0])
AC_LANG_POP(C++)
fi])
#
# If the attribute is supported by both compilers,
# try to recompile a *cross-check*, IFF defined.
#
if test '(' "$opal_cv___attribute__[$1]" = "1" -a "[$3]" != "" ')' ; then
ac_c_werror_flag_safe=$ac_c_werror_flag
ac_c_werror_flag="yes"
CFLAGS_safe=$CFLAGS
CFLAGS="$CFLAGS [$4]"
AC_TRY_COMPILE([$3],
[
int i=4711;
i=usage(&i);
],
[opal_cv___attribute__[$1]=0],
[
#
# In case we did NOT succeed: Fine, but was this due to the
# attribute being ignored? Grep for IgNoRe in conftest.err
# and if found, reset the ompi_cv__attribute__var=0
#
opal_cv___attribute__[$1]=1
_OPAL_ATTRIBUTE_FAIL_SEARCH([$1])
])
ac_c_werror_flag=$ac_c_werror_flag_safe
CFLAGS=$CFLAGS_safe
fi
])
if test "$opal_cv___attribute__[$1]" = "1" ; then
AC_MSG_RESULT([yes])
else
AC_MSG_RESULT([no])
fi
])
#
# Test the availability of __attribute__ and with the help
# of _OPAL_CHECK_SPECIFIC_ATTRIBUTE for the support of
# particular attributes. Compilers, that do not support an
# attribute most often fail with a warning (when the warning
# level is set).
# The compilers output is parsed in _OPAL_ATTRIBUTE_FAIL_SEARCH
#
# To add a new attributes __NAME__ add the
# opal_cv___attribute__NAME
# add a new check with _OPAL_CHECK_SPECIFIC_ATTRIBUTE (possibly with a cross-check)
# _OPAL_CHECK_SPECIFIC_ATTRIBUTE([name], [int foo (int arg) __attribute__ ((__name__));], [], [])
# and define the corresponding
# AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_NAME, [$opal_cv___attribute__NAME],
# [Whether your compiler has __attribute__ NAME or not])
# and decide on a correct macro (in opal/include/opal_config_bottom.h):
# # define __opal_attribute_NAME(x) __attribute__(__NAME__)
#
# Please use the "__"-notation of the attribute in order not to
# clash with predefined names or macros (e.g. const, which some compilers
# do not like..)
#
AC_DEFUN([OPAL_CHECK_ATTRIBUTES], [
AC_LANG(C)
AC_MSG_CHECKING(for __attribute__)
AC_CACHE_VAL(opal_cv___attribute__, [
AC_TRY_COMPILE(
[#include <stdlib.h>
/* Check for the longest available __attribute__ (since gcc-2.3) */
struct foo {
char a;
int x[2] __attribute__ ((__packed__));
};
],
[],
[opal_cv___attribute__=1],
[opal_cv___attribute__=0],
)
if test "$opal_cv___attribute__" = "1" ; then
AC_TRY_COMPILE(
[#include <stdlib.h>
/* Check for the longest available __attribute__ (since gcc-2.3) */
struct foo {
char a;
int x[2] __attribute__ ((__packed__));
};
],
[],
[opal_cv___attribute__=1],
[opal_cv___attribute__=0],
)
fi
])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE, [$opal_cv___attribute__],
[Whether your compiler has __attribute__ or not])
#
# Now that we know the compiler support __attribute__ let's check which kind of
# attributed are supported.
#
if test "$opal_cv___attribute__" = "0" ; then
AC_MSG_RESULT([no])
opal_cv___attribute__aligned=0
opal_cv___attribute__always_inline=0
opal_cv___attribute__cold=0
opal_cv___attribute__const=0
opal_cv___attribute__deprecated=0
opal_cv___attribute__deprecated_argument=0
opal_cv___attribute__format=0
opal_cv___attribute__format_funcptr=0
opal_cv___attribute__hot=0
opal_cv___attribute__malloc=0
opal_cv___attribute__may_alias=0
opal_cv___attribute__no_instrument_function=0
opal_cv___attribute__noinline=0
opal_cv___attribute__nonnull=0
opal_cv___attribute__noreturn=0
opal_cv___attribute__noreturn_funcptr=0
opal_cv___attribute__packed=0
opal_cv___attribute__pure=0
opal_cv___attribute__sentinel=0
opal_cv___attribute__unused=0
opal_cv___attribute__visibility=0
opal_cv___attribute__warn_unused_result=0
opal_cv___attribute__weak_alias=0
opal_cv___attribute__destructor=0
else
AC_MSG_RESULT([yes])
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([aligned],
[struct foo { char text[4]; } __attribute__ ((__aligned__(8)));],
[],
[])
#
# Ignored by PGI-6.2.5; -- recognized by output-parser
#
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([always_inline],
[int foo (int arg) __attribute__ ((__always_inline__));],
[],
[])
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([cold],
[
int foo(int arg1, int arg2) __attribute__ ((__cold__));
int foo(int arg1, int arg2) { return arg1 * arg2 + arg1; }
],
[],
[])
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([const],
[
int foo(int arg1, int arg2) __attribute__ ((__const__));
int foo(int arg1, int arg2) { return arg1 * arg2 + arg1; }
],
[],
[])
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([deprecated],
[
int foo(int arg1, int arg2) __attribute__ ((__deprecated__));
int foo(int arg1, int arg2) { return arg1 * arg2 + arg1; }
],
[],
[])
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([deprecated_argument],
[
int foo(int arg1, int arg2) __attribute__ ((__deprecated__("compiler allows argument")));
int foo(int arg1, int arg2) { return arg1 * arg2 + arg1; }
],
[],
[])
ATTRIBUTE_CFLAGS=
case "$ompi_c_vendor" in
gnu)
ATTRIBUTE_CFLAGS="-Wall"
;;
intel)
# we want specifically the warning on format string conversion
ATTRIBUTE_CFLAGS="-we181"
;;
esac
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([format],
[
int this_printf (void *my_object, const char *my_format, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
],
[
static int usage (int * argument);
extern int this_printf (int arg1, const char *my_format, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
static int usage (int * argument) {
return this_printf (*argument, "%d", argument); /* This should produce a format warning */
}
/* The autoconf-generated main-function is int main(), which produces a warning by itself */
int main(void);
],
[$ATTRIBUTE_CFLAGS])
ATTRIBUTE_CFLAGS=
case "$ompi_c_vendor" in
gnu)
ATTRIBUTE_CFLAGS="-Wall"
;;
intel)
# we want specifically the warning on format string conversion
ATTRIBUTE_CFLAGS="-we181"
;;
esac
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([format_funcptr],
[
int (*this_printf)(void *my_object, const char *my_format, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
],
[
static int usage (int * argument);
extern int (*this_printf) (int arg1, const char *my_format, ...) __attribute__ ((__format__ (__printf__, 2, 3)));
static int usage (int * argument) {
return (*this_printf) (*argument, "%d", argument); /* This should produce a format warning */
}
/* The autoconf-generated main-function is int main(), which produces a warning by itself */
int main(void);
],
[$ATTRIBUTE_CFLAGS])
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([hot],
[
int foo(int arg1, int arg2) __attribute__ ((__hot__));
int foo(int arg1, int arg2) { return arg1 * arg2 + arg1; }
],
[],
[])
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([malloc],
[
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif
int * foo(int arg1) __attribute__ ((__malloc__));
int * foo(int arg1) { return (int*) malloc(arg1); }
],
[],
[])
#
# Attribute may_alias: No suitable cross-check available, that works for non-supporting compilers
# Ignored by intel-9.1.045 -- turn off with -wd1292
# Ignored by PGI-6.2.5; ignore not detected due to missing cross-check
#
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([may_alias],
[int * p_value __attribute__ ((__may_alias__));],
[],
[])
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([no_instrument_function],
[int * foo(int arg1) __attribute__ ((__no_instrument_function__));],
[],
[])
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([noinline],
[
int foo(int arg1, int arg2) __attribute__ ((__noinline__));
int foo(int arg1, int arg2) { return arg1 * arg2 + arg1; }
static int bar(int arg1, int arg2) __attribute__ ((__noinline__));
static int bar(int arg1, int arg2) { return arg1 * arg2 + arg1; }
],
[],
[])
#
# Attribute nonnull:
# Ignored by intel-compiler 9.1.045 -- recognized by cross-check
# Ignored by PGI-6.2.5 (pgCC) -- recognized by cross-check
#
ATTRIBUTE_CFLAGS=
case "$ompi_c_vendor" in
gnu)
ATTRIBUTE_CFLAGS="-Wall"
;;
intel)
# we do not want to get ignored attributes warnings, but rather real warnings
ATTRIBUTE_CFLAGS="-wd1292"
;;
esac
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([nonnull],
[
int square(int *arg) __attribute__ ((__nonnull__));
int square(int *arg) { return *arg; }
],
[
static int usage(int * argument);
int square(int * argument) __attribute__ ((__nonnull__));
int square(int * argument) { return (*argument) * (*argument); }
static int usage(int * argument) {
return square( ((void*)0) ); /* This should produce an argument must be nonnull warning */
}
/* The autoconf-generated main-function is int main(), which produces a warning by itself */
int main(void);
],
[$ATTRIBUTE_CFLAGS])
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([noreturn],
[
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif
void fatal(int arg1) __attribute__ ((__noreturn__));
void fatal(int arg1) { exit(arg1); }
],
[],
[])
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([noreturn_funcptr],
[
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif
extern void (*fatal_exit)(int arg1) __attribute__ ((__noreturn__));
void fatal(int arg1) { fatal_exit (arg1); }
],
[],
[$ATTRIBUTE_CFLAGS])
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([packed],
[
struct foo {
char a;
int x[2] __attribute__ ((__packed__));
};
],
[],
[])
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([pure],
[
int square(int arg) __attribute__ ((__pure__));
int square(int arg) { return arg * arg; }
],
[],
[])
#
# Attribute sentinel:
# Ignored by the intel-9.1.045 -- recognized by cross-check
# intel-10.0beta works fine
# Ignored by PGI-6.2.5 (pgCC) -- recognized by output-parser and cross-check
# Ignored by pathcc-2.2.1 -- recognized by cross-check (through grep ignore)
#
ATTRIBUTE_CFLAGS=
case "$ompi_c_vendor" in
gnu)
ATTRIBUTE_CFLAGS="-Wall"
;;
intel)
# we do not want to get ignored attributes warnings
ATTRIBUTE_CFLAGS="-wd1292"
;;
esac
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([sentinel],
[
int my_execlp(const char * file, const char *arg, ...) __attribute__ ((__sentinel__));
],
[
static int usage(int * argument);
int my_execlp(const char * file, const char *arg, ...) __attribute__ ((__sentinel__));
static int usage(int * argument) {
void * last_arg_should_be_null = argument;
return my_execlp ("lala", "/home/there", last_arg_should_be_null); /* This should produce a warning */
}
/* The autoconf-generated main-function is int main(), which produces a warning by itself */
int main(void);
],
[$ATTRIBUTE_CFLAGS])
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([unused],
[
int square(int arg1 __attribute__ ((__unused__)), int arg2);
int square(int arg1, int arg2) { return arg2; }
],
[],
[])
#
# Ignored by PGI-6.2.5 (pgCC) -- recognized by the output-parser
#
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([visibility],
[
int square(int arg1) __attribute__ ((__visibility__("hidden")));
],
[],
[])
#
# Attribute warn_unused_result:
# Ignored by the intel-compiler 9.1.045 -- recognized by cross-check
# Ignored by pathcc-2.2.1 -- recognized by cross-check (through grep ignore)
#
ATTRIBUTE_CFLAGS=
case "$ompi_c_vendor" in
gnu)
ATTRIBUTE_CFLAGS="-Wall"
;;
intel)
# we do not want to get ignored attributes warnings
ATTRIBUTE_CFLAGS="-wd1292"
;;
esac
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([warn_unused_result],
[
int foo(int arg) __attribute__ ((__warn_unused_result__));
int foo(int arg) { return arg + 3; }
],
[
static int usage(int * argument);
int foo(int arg) __attribute__ ((__warn_unused_result__));
int foo(int arg) { return arg + 3; }
static int usage(int * argument) {
foo (*argument); /* Should produce an unused result warning */
return 0;
}
/* The autoconf-generated main-function is int main(), which produces a warning by itself */
int main(void);
],
[$ATTRIBUTE_CFLAGS])
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([weak_alias],
[
int foo(int arg);
int foo(int arg) { return arg + 3; }
int foo2(int arg) __attribute__ ((__weak__, __alias__("foo")));
],
[],
[])
_OPAL_CHECK_SPECIFIC_ATTRIBUTE([destructor],
[
void foo(void) __attribute__ ((__destructor__));
void foo(void) { return ; }
],
[],
[])
fi
# Now that all the values are set, define them
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_ALIGNED, [$opal_cv___attribute__aligned],
[Whether your compiler has __attribute__ aligned or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_ALWAYS_INLINE, [$opal_cv___attribute__always_inline],
[Whether your compiler has __attribute__ always_inline or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_COLD, [$opal_cv___attribute__cold],
[Whether your compiler has __attribute__ cold or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_CONST, [$opal_cv___attribute__const],
[Whether your compiler has __attribute__ const or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_DEPRECATED, [$opal_cv___attribute__deprecated],
[Whether your compiler has __attribute__ deprecated or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_DEPRECATED_ARGUMENT, [$opal_cv___attribute__deprecated_argument],
[Whether your compiler has __attribute__ deprecated with optional argument])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_FORMAT, [$opal_cv___attribute__format],
[Whether your compiler has __attribute__ format or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_FORMAT_FUNCPTR, [$opal_cv___attribute__format_funcptr],
[Whether your compiler has __attribute__ format and it works on function pointers])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_HOT, [$opal_cv___attribute__hot],
[Whether your compiler has __attribute__ hot or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_MALLOC, [$opal_cv___attribute__malloc],
[Whether your compiler has __attribute__ malloc or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_MAY_ALIAS, [$opal_cv___attribute__may_alias],
[Whether your compiler has __attribute__ may_alias or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_NO_INSTRUMENT_FUNCTION, [$opal_cv___attribute__no_instrument_function],
[Whether your compiler has __attribute__ no_instrument_function or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_NOINLINE, [$opal_cv___attribute__noinline],
[Whether your compiler has __attribute__ noinline or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_NONNULL, [$opal_cv___attribute__nonnull],
[Whether your compiler has __attribute__ nonnull or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_NORETURN, [$opal_cv___attribute__noreturn],
[Whether your compiler has __attribute__ noreturn or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_NORETURN_FUNCPTR, [$opal_cv___attribute__noreturn_funcptr],
[Whether your compiler has __attribute__ noreturn and it works on function pointers])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_PACKED, [$opal_cv___attribute__packed],
[Whether your compiler has __attribute__ packed or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_PURE, [$opal_cv___attribute__pure],
[Whether your compiler has __attribute__ pure or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_SENTINEL, [$opal_cv___attribute__sentinel],
[Whether your compiler has __attribute__ sentinel or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_UNUSED, [$opal_cv___attribute__unused],
[Whether your compiler has __attribute__ unused or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_VISIBILITY, [$opal_cv___attribute__visibility],
[Whether your compiler has __attribute__ visibility or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_WARN_UNUSED_RESULT, [$opal_cv___attribute__warn_unused_result],
[Whether your compiler has __attribute__ warn unused result or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_WEAK_ALIAS, [$opal_cv___attribute__weak_alias],
[Whether your compiler has __attribute__ weak alias or not])
AC_DEFINE_UNQUOTED(OPAL_HAVE_ATTRIBUTE_DESTRUCTOR, [$opal_cv___attribute__destructor],
[Whether your compiler has __attribute__ destructor or not])
])