#							-*- Autotest -*-

AT_BANNER([Low level compiling/preprocessing macros.])

# Copyright (C) 2000-2001, 2003, 2005-2012 Free Software Foundation,
# Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


# Since the macros which compile are required by most tests, check
# them first.  But remember that looking for a compiler is even more
# primitive, so check those first.


## ------------------------------------- ##
## AC_LANG, AC_LANG_PUSH & AC_LANG_POP.  ##
## ------------------------------------- ##

AT_SETUP([[AC_LANG, AC_LANG_PUSH & AC_LANG_POP]])

AT_DATA([configure.ac],
[[AC_INIT
# C
AC_LANG([C])
# C
AC_LANG_PUSH([C])
# C C
AC_LANG_PUSH([C++])
# C++ C C
AC_LANG([C++])
# C++ C C
AC_LANG_PUSH([Erlang])
# Erlang C++ C C
AC_LANG_PUSH([Fortran 77])
# F77 Erlang C++ C C
AC_LANG_POP([Fortran 77])
# Erlang C++ C C
AC_LANG_POP([Erlang])
# C++ C C
AC_LANG([C++])
# C++ C C
AC_LANG_POP([C++])
# C C
AC_LANG_POP([C])
# C
]])

AT_CHECK_AUTOCONF
AT_CHECK([sed -n 's/^ac_ext=//p' configure], 0,
[c
c
c
cpp
cpp
erl
f
erl
cpp
cpp
c
c
])

AT_CLEANUP


## ---------------------- ##
## AC_REQUIRE & AC_LANG.  ##
## ---------------------- ##

AT_SETUP([AC_REQUIRE & AC_LANG])

AT_DATA([configure.ac],
[[AC_DEFUN([AC_F77_1],
[AC_LANG_PUSH([Fortran 77])
if test $ac_ext != f; then
  AC_MSG_ERROR([F77_1: current shell language is $ac_ext, expected Fortran])
fi
AC_LANG_POP
])


AC_DEFUN([AC_F77_2],
[AC_LANG_PUSH([Fortran 77])
AC_REQUIRE([AC_F77_1])
if test $ac_ext != f; then
  AC_MSG_ERROR([F77_2: current shell language is $ac_ext, expected Fortran])
fi
AC_LANG_POP
])

AC_INIT
AC_F77_2
AS_EXIT(0)
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE

AT_CLEANUP


## ---------------- ##
## AC_LANG_SOURCE.  ##
## ---------------- ##

AT_SETUP([AC_LANG_SOURCE])

AT_DATA([configure.ac],
[[AC_INIT([pkg], [1.0])
AC_PROG_CC
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#ifndef PACKAGE_NAME
choke me
#endif
int main ()
{
  return 0;
}
]], [], [AC_MSG_FAILURE([confdefs not included])])])
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE

AT_CLEANUP


## --------------------- ##
## AC_LANG_SOURCE(C++).  ##
## --------------------- ##

AT_SETUP([AC_LANG_SOURCE(C++)])

AT_DATA([configure.ac],
[[AC_INIT([pkg], [1.0])
AC_PROG_CXX
AC_LANG([C++])
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[#ifndef PACKAGE_NAME
choke me
#endif
int main ()
{
  return 0;
}
]], [], [AC_MSG_FAILURE([confdefs not included])])])
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE

AT_CLEANUP


## ------------------------ ##
## AC_LANG_SOURCE example.  ##
## ------------------------ ##

AT_SETUP([AC_LANG_SOURCE example])

# Set CONFIG_SITE to a nonexistent file, so that there are
# no worries about configure output caused by sourcing a config.site.
CONFIG_SITE=no-such-file
export CONFIG_SITE

AT_DATA([configure.ac],
[[# Taken from autoconf.texi:Generating Sources.
# The only change is to not fail if gcc doesn't work.
AC_INIT([Hello], [1.0], [bug-hello@example.org], [],
        [http://www.example.org/])
AC_DEFINE([HELLO_WORLD], ["Hello, World\n"],
  [Greetings string.])
AC_LANG([C])
AC_LANG_CONFTEST(
   [AC_LANG_SOURCE([[const char hw[] = "Hello, World\n";]])])
gcc -E -dD conftest.c || AS_EXIT([77])
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE([], [], [stdout])
# Taken from autoconf.texi:Generating Sources.
# Note that the output may contain more defines and lines matching
#   # 1 "conftest.c"
# so delete everything before the interesting output.
AT_CHECK([sed -n 's/ *$//; /#define PACKAGE/,$p' stdout], [],
[[#define PACKAGE_NAME "Hello"
#define PACKAGE_TARNAME "hello"
#define PACKAGE_VERSION "1.0"
#define PACKAGE_STRING "Hello 1.0"
#define PACKAGE_BUGREPORT "bug-hello@example.org"
#define PACKAGE_URL "http://www.example.org/"
#define HELLO_WORLD "Hello, World\n"

const char hw[] = "Hello, World\n";
]])

AT_CLEANUP


## ------------------------- ##
## AC_LANG_PROGRAM example.  ##
## ------------------------- ##

AT_SETUP([AC_LANG_PROGRAM example])

# Set CONFIG_SITE to a nonexistent file, so that there are
# no worries about configure output caused by sourcing a config.site.
CONFIG_SITE=no-such-file
export CONFIG_SITE

AT_DATA([configure.ac],
[[# Taken from autoconf.texi:Generating Sources.
# The only change is to not fail if gcc doesn't work.
AC_INIT([Hello], [1.0], [bug-hello@example.org], [],
        [http://www.example.org/])
AC_DEFINE([HELLO_WORLD], ["Hello, World\n"],
  [Greetings string.])
AC_LANG_CONFTEST(
[AC_LANG_PROGRAM([[const char hw[] = "Hello, World\n";]],
                 [[fputs (hw, stdout);]])])
gcc -E -dD conftest.c || AS_EXIT([77])
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE([], [], [stdout])
# Taken from autoconf.texi:Generating Sources.
# Note that the output may contain more defines and lines matching
#   # 1 "conftest.c"
# so delete everything before the interesting output.
AT_CHECK([sed -n 's/ *$//; /#define PACKAGE/,$p' stdout], [],
[[#define PACKAGE_NAME "Hello"
#define PACKAGE_TARNAME "hello"
#define PACKAGE_VERSION "1.0"
#define PACKAGE_STRING "Hello 1.0"
#define PACKAGE_BUGREPORT "bug-hello@example.org"
#define PACKAGE_URL "http://www.example.org/"
#define HELLO_WORLD "Hello, World\n"

const char hw[] = "Hello, World\n";
int
main ()
{
fputs (hw, stdout);
  ;
  return 0;
}
]])

AT_CLEANUP


## ------------------- ##
## AC_COMPILE_IFELSE.  ##
## ------------------- ##

AT_SETUP([AC_COMPILE_IFELSE])
AT_KEYWORDS([AC_LANG_DEFINES_PROVIDED])

AT_DATA([configure.ac],
[[AC_INIT
AC_COMPILE_IFELSE([int main () { return 0; }], [],
  [AC_MSG_ERROR([compiling trivial program failed])])
]])

AT_CHECK_AUTOCONF([], [], [], [stderr])
AT_CHECK([grep 'no AC_LANG_SOURCE call detected in body' stderr], [], [ignore])
AT_CHECK_AUTOCONF([-W no-syntax])
AT_CHECK_CONFIGURE([-q])

AT_DATA([configure.ac],
[[AC_INIT
AC_COMPILE_IFELSE([AC_LANG_DEFINES_PROVIDED()int main () { return 0; }], [],
  [AC_MSG_ERROR([compiling trivial program failed])])
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE([-q])

AT_DATA([configure.ac],
[[AC_INIT
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [return 0])],
	      [],
	      [AC_MSG_ERROR([compiling `return 0' failed])])

AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [return 2])],
	      [],
	      [AC_MSG_ERROR([compiling `return 2' failed])])
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE([-q])

AT_CLEANUP

## --------------- ##
## AC_RUN_IFELSE.  ##
## --------------- ##

AT_SETUP([AC_RUN_IFELSE])
AT_KEYWORDS([AC_TRY_RUN])

AT_DATA([configure.ac],
[[AC_INIT

AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 0])],
	      [],
	      [AC_MSG_ERROR([saw `return 0' as a failure])])

AC_RUN_IFELSE([AC_LANG_PROGRAM([], [return 2])],
	      [AC_MSG_ERROR([saw `return 2' as a success])],
	      [estatus=$?
test $estatus != 2 &&
  AC_MSG_ERROR([did not get as 2 exit status: $estatus])])

# The old stinky one.
AC_TRY_RUN([int main () { return 3; }],
	   [AC_MSG_ERROR([saw `return 3' as a success])],
	   [estatus=$?
test $estatus != 3 &&
  AC_MSG_ERROR([did not get 3 as exit status: $estatus])])

]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE([-q])

AT_CLEANUP

## --------------------------  ##
## Order of `rm' and actions.  ##
## --------------------------  ##

AT_SETUP([Order of user actions and cleanup])
AT_DATA([configure.ac],
[[AC_INIT
AC_PROG_CC

AC_PREPROC_IFELSE([AC_LANG_PROGRAM([int grepme;], [])],
		  [{ test -f conftest.err && grep grepme conftest.i; } || AS_EXIT([1])],
		  [AS_EXIT([1])])
AC_PREPROC_IFELSE([AC_LANG_PROGRAM([#define 12 34 /*], [])],
		  [AS_EXIT([1])],
		  [test -f conftest.err || AS_EXIT([1])])

AC_COMPILE_IFELSE([AC_LANG_PROGRAM([int ok;], [])],
		  [test -f conftest.$ac_objext || AS_EXIT([1])],
		  [AS_EXIT([1])])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([int bad bad;], [])],
		  [AS_EXIT([1])],
		  [test -f conftest.err || AS_EXIT([1])])

AC_LINK_IFELSE([AC_LANG_PROGRAM([int ok;], [])],
	       [test -f conftest$ac_exeext || AS_EXIT([1])],
	       [AS_EXIT([1])])
AC_LINK_IFELSE([AC_LANG_PROGRAM([int bad bad;], [])],
	       [AS_EXIT([1])],
	       [test -f conftest.err || AS_EXIT([1])])

AC_RUN_IFELSE([AC_LANG_PROGRAM([int ok;], [])],
	      [./conftest$ac_exeext || AS_EXIT([1])],
	      [AS_EXIT([1])])

d@&t@nl conftest.err not generated by AC_RUN_IFELSE?
AC_RUN_IFELSE([AC_LANG_PROGRAM([int bad bad;], [])],
	      [AS_EXIT([1])],
	      [])
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE([-q])

AT_CLEANUP


## ------------------ ##
## AC_TRY_LINK_FUNC.  ##
## ------------------ ##

AT_CHECK_MACRO([AC_TRY_LINK_FUNC],
[AC_TRY_LINK_FUNC(printf,,
		  [AC_MSG_ERROR([cannot find `printf'])])
AC_TRY_LINK_FUNC(Be_doomed_if_your_libc_has_a_function_named_like_this,
		 [AC_MSG_ERROR([found a nonexistent function])])])

## -------------------- ##
## Multiple languages.  ##
## -------------------- ##

AT_SETUP([Multiple languages])

# This test should be skipped if the C compiler is a C++ compiler.
AT_DATA([configure.ac],
[[AC_INIT

AC_PROG_CC
AC_COMPILE_IFELSE([
  AC_LANG_PROGRAM([[
    #ifdef __cplusplus
    choke me
    #endif
  ]])], [], AS_EXIT([77]))
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE

# This test should be skipped on systems without a C++ compiler.
AT_DATA([configure.ac],
[[AC_INIT

AC_PROG_CXX
AC_LANG_PUSH([C++])
AC_COMPILE_IFELSE([
  AC_LANG_PROGRAM([[
    #ifndef __cplusplus
    choke me
    #endif
  ]])], [], AS_EXIT([77]))
AC_LANG_POP([C++])
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE

AT_DATA([configure.ac],
[[AC_INIT

AC_PROG_CC
AC_PROG_CXX

AC_LANG_PUSH([C])
AC_MSG_CHECKING([a simple C program that is not valid C++])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([enum a { A, B, C };
				    enum a f(enum a in) { return in++; }], [])],
		  [AC_MSG_RESULT([ok])],
		  [AC_MSG_RESULT([failed])
		   AC_MSG_ERROR([could not compile test program])])
AC_LANG_POP([C])

AC_LANG_PUSH([C++])
AC_MSG_CHECKING([a simple C++ program that is not valid C])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([class A {};], [])],
		  [AC_MSG_RESULT([ok])],
		  [AC_MSG_RESULT([failed])
		   AC_MSG_ERROR([could not compile test program])])

AC_CHECK_HEADER([cstring])
AC_LANG_POP([C++])
]])

AT_CHECK_AUTOCONF
AT_CHECK_CONFIGURE([-q])

AT_CLEANUP