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@@ -1,793 +0,0 @@
-"""SCons.Conftest
-
-Autoconf-like configuration support; low level implementation of tests.
-"""
-
-#
-# Copyright (c) 2003 Stichting NLnet Labs
-# Copyright (c) 2001, 2002, 2003 Steven Knight
-#
-# Permission is hereby granted, free of charge, to any person obtaining
-# a copy of this software and associated documentation files (the
-# "Software"), to deal in the Software without restriction, including
-# without limitation the rights to use, copy, modify, merge, publish,
-# distribute, sublicense, and/or sell copies of the Software, and to
-# permit persons to whom the Software is furnished to do so, subject to
-# the following conditions:
-#
-# The above copyright notice and this permission notice shall be included
-# in all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
-# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
-# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-#
-
-#
-# The purpose of this module is to define how a check is to be performed.
-# Use one of the Check...() functions below.
-#
-
-#
-# A context class is used that defines functions for carrying out the tests,
-# logging and messages. The following methods and members must be present:
-#
-# context.Display(msg) Function called to print messages that are normally
-# displayed for the user. Newlines are explicitly used.
-# The text should also be written to the logfile!
-#
-# context.Log(msg) Function called to write to a log file.
-#
-# context.BuildProg(text, ext)
-# Function called to build a program, using "ext" for the
-# file extention. Must return an empty string for
-# success, an error message for failure.
-# For reliable test results building should be done just
-# like an actual program would be build, using the same
-# command and arguments (including configure results so
-# far).
-#
-# context.CompileProg(text, ext)
-# Function called to compile a program, using "ext" for
-# the file extention. Must return an empty string for
-# success, an error message for failure.
-# For reliable test results compiling should be done just
-# like an actual source file would be compiled, using the
-# same command and arguments (including configure results
-# so far).
-#
-# context.AppendLIBS(lib_name_list)
-# Append "lib_name_list" to the value of LIBS.
-# "lib_namelist" is a list of strings.
-# Return the value of LIBS before changing it (any type
-# can be used, it is passed to SetLIBS() later.)
-#
-# context.PrependLIBS(lib_name_list)
-# Prepend "lib_name_list" to the value of LIBS.
-# "lib_namelist" is a list of strings.
-# Return the value of LIBS before changing it (any type
-# can be used, it is passed to SetLIBS() later.)
-#
-# context.SetLIBS(value)
-# Set LIBS to "value". The type of "value" is what
-# AppendLIBS() returned.
-# Return the value of LIBS before changing it (any type
-# can be used, it is passed to SetLIBS() later.)
-#
-# context.headerfilename
-# Name of file to append configure results to, usually
-# "confdefs.h".
-# The file must not exist or be empty when starting.
-# Empty or None to skip this (some tests will not work!).
-#
-# context.config_h (may be missing). If present, must be a string, which
-# will be filled with the contents of a config_h file.
-#
-# context.vardict Dictionary holding variables used for the tests and
-# stores results from the tests, used for the build
-# commands.
-# Normally contains "CC", "LIBS", "CPPFLAGS", etc.
-#
-# context.havedict Dictionary holding results from the tests that are to
-# be used inside a program.
-# Names often start with "HAVE_". These are zero
-# (feature not present) or one (feature present). Other
-# variables may have any value, e.g., "PERLVERSION" can
-# be a number and "SYSTEMNAME" a string.
-#
-
-import re
-from types import IntType
-
-#
-# PUBLIC VARIABLES
-#
-
-LogInputFiles = 1 # Set that to log the input files in case of a failed test
-LogErrorMessages = 1 # Set that to log Conftest-generated error messages
-
-#
-# PUBLIC FUNCTIONS
-#
-
-# Generic remarks:
-# - When a language is specified which is not supported the test fails. The
-# message is a bit different, because not all the arguments for the normal
-# message are available yet (chicken-egg problem).
-
-
-def CheckBuilder(context, text = None, language = None):
- """
- Configure check to see if the compiler works.
- Note that this uses the current value of compiler and linker flags, make
- sure $CFLAGS, $CPPFLAGS and $LIBS are set correctly.
- "language" should be "C" or "C++" and is used to select the compiler.
- Default is "C".
- "text" may be used to specify the code to be build.
- Returns an empty string for success, an error message for failure.
- """
- lang, suffix, msg = _lang2suffix(language)
- if msg:
- context.Display("%s\n" % msg)
- return msg
-
- if not text:
- text = """
-int main() {
- return 0;
-}
-"""
-
- context.Display("Checking if building a %s file works... " % lang)
- ret = context.BuildProg(text, suffix)
- _YesNoResult(context, ret, None, text)
- return ret
-
-def CheckCC(context):
- """
- Configure check for a working C compiler.
-
- This checks whether the C compiler, as defined in the $CC construction
- variable, can compile a C source file. It uses the current $CCCOM value
- too, so that it can test against non working flags.
-
- """
- context.Display("Checking whether the C compiler works")
- text = """
-int main()
-{
- return 0;
-}
-"""
- ret = _check_empty_program(context, 'CC', text, 'C')
- _YesNoResult(context, ret, None, text)
- return ret
-
-def CheckSHCC(context):
- """
- Configure check for a working shared C compiler.
-
- This checks whether the C compiler, as defined in the $SHCC construction
- variable, can compile a C source file. It uses the current $SHCCCOM value
- too, so that it can test against non working flags.
-
- """
- context.Display("Checking whether the (shared) C compiler works")
- text = """
-int foo()
-{
- return 0;
-}
-"""
- ret = _check_empty_program(context, 'SHCC', text, 'C', use_shared = True)
- _YesNoResult(context, ret, None, text)
- return ret
-
-def CheckCXX(context):
- """
- Configure check for a working CXX compiler.
-
- This checks whether the CXX compiler, as defined in the $CXX construction
- variable, can compile a CXX source file. It uses the current $CXXCOM value
- too, so that it can test against non working flags.
-
- """
- context.Display("Checking whether the C++ compiler works")
- text = """
-int main()
-{
- return 0;
-}
-"""
- ret = _check_empty_program(context, 'CXX', text, 'C++')
- _YesNoResult(context, ret, None, text)
- return ret
-
-def CheckSHCXX(context):
- """
- Configure check for a working shared CXX compiler.
-
- This checks whether the CXX compiler, as defined in the $SHCXX construction
- variable, can compile a CXX source file. It uses the current $SHCXXCOM value
- too, so that it can test against non working flags.
-
- """
- context.Display("Checking whether the (shared) C++ compiler works")
- text = """
-int main()
-{
- return 0;
-}
-"""
- ret = _check_empty_program(context, 'SHCXX', text, 'C++', use_shared = True)
- _YesNoResult(context, ret, None, text)
- return ret
-
-def _check_empty_program(context, comp, text, language, use_shared = False):
- """Return 0 on success, 1 otherwise."""
- if comp not in context.env or not context.env[comp]:
- # The compiler construction variable is not set or empty
- return 1
-
- lang, suffix, msg = _lang2suffix(language)
- if msg:
- return 1
-
- if use_shared:
- return context.CompileSharedObject(text, suffix)
- else:
- return context.CompileProg(text, suffix)
-
-
-def CheckFunc(context, function_name, header = None, language = None):
- """
- Configure check for a function "function_name".
- "language" should be "C" or "C++" and is used to select the compiler.
- Default is "C".
- Optional "header" can be defined to define a function prototype, include a
- header file or anything else that comes before main().
- Sets HAVE_function_name in context.havedict according to the result.
- Note that this uses the current value of compiler and linker flags, make
- sure $CFLAGS, $CPPFLAGS and $LIBS are set correctly.
- Returns an empty string for success, an error message for failure.
- """
-
- # Remarks from autoconf:
- # - Don't include <ctype.h> because on OSF/1 3.0 it includes <sys/types.h>
- # which includes <sys/select.h> which contains a prototype for select.
- # Similarly for bzero.
- # - assert.h is included to define __stub macros and hopefully few
- # prototypes, which can conflict with char $1(); below.
- # - Override any gcc2 internal prototype to avoid an error.
- # - We use char for the function declaration because int might match the
- # return type of a gcc2 builtin and then its argument prototype would
- # still apply.
- # - The GNU C library defines this for functions which it implements to
- # always fail with ENOSYS. Some functions are actually named something
- # starting with __ and the normal name is an alias.
-
- if context.headerfilename:
- includetext = '#include "%s"' % context.headerfilename
- else:
- includetext = ''
- if not header:
- header = """
-#ifdef __cplusplus
-extern "C"
-#endif
-char %s();""" % function_name
-
- lang, suffix, msg = _lang2suffix(language)
- if msg:
- context.Display("Cannot check for %s(): %s\n" % (function_name, msg))
- return msg
-
- text = """
-%(include)s
-#include <assert.h>
-%(hdr)s
-
-int main() {
-#if defined (__stub_%(name)s) || defined (__stub___%(name)s)
- fail fail fail
-#else
- %(name)s();
-#endif
-
- return 0;
-}
-""" % { 'name': function_name,
- 'include': includetext,
- 'hdr': header }
-
- context.Display("Checking for %s function %s()... " % (lang, function_name))
- ret = context.BuildProg(text, suffix)
- _YesNoResult(context, ret, "HAVE_" + function_name, text,
- "Define to 1 if the system has the function `%s'." %\
- function_name)
- return ret
-
-
-def CheckHeader(context, header_name, header = None, language = None,
- include_quotes = None):
- """
- Configure check for a C or C++ header file "header_name".
- Optional "header" can be defined to do something before including the
- header file (unusual, supported for consistency).
- "language" should be "C" or "C++" and is used to select the compiler.
- Default is "C".
- Sets HAVE_header_name in context.havedict according to the result.
- Note that this uses the current value of compiler and linker flags, make
- sure $CFLAGS and $CPPFLAGS are set correctly.
- Returns an empty string for success, an error message for failure.
- """
- # Why compile the program instead of just running the preprocessor?
- # It is possible that the header file exists, but actually using it may
- # fail (e.g., because it depends on other header files). Thus this test is
- # more strict. It may require using the "header" argument.
- #
- # Use <> by default, because the check is normally used for system header
- # files. SCons passes '""' to overrule this.
-
- # Include "confdefs.h" first, so that the header can use HAVE_HEADER_H.
- if context.headerfilename:
- includetext = '#include "%s"\n' % context.headerfilename
- else:
- includetext = ''
- if not header:
- header = ""
-
- lang, suffix, msg = _lang2suffix(language)
- if msg:
- context.Display("Cannot check for header file %s: %s\n"
- % (header_name, msg))
- return msg
-
- if not include_quotes:
- include_quotes = "<>"
-
- text = "%s%s\n#include %s%s%s\n\n" % (includetext, header,
- include_quotes[0], header_name, include_quotes[1])
-
- context.Display("Checking for %s header file %s... " % (lang, header_name))
- ret = context.CompileProg(text, suffix)
- _YesNoResult(context, ret, "HAVE_" + header_name, text,
- "Define to 1 if you have the <%s> header file." % header_name)
- return ret
-
-
-def CheckType(context, type_name, fallback = None,
- header = None, language = None):
- """
- Configure check for a C or C++ type "type_name".
- Optional "header" can be defined to include a header file.
- "language" should be "C" or "C++" and is used to select the compiler.
- Default is "C".
- Sets HAVE_type_name in context.havedict according to the result.
- Note that this uses the current value of compiler and linker flags, make
- sure $CFLAGS, $CPPFLAGS and $LIBS are set correctly.
- Returns an empty string for success, an error message for failure.
- """
-
- # Include "confdefs.h" first, so that the header can use HAVE_HEADER_H.
- if context.headerfilename:
- includetext = '#include "%s"' % context.headerfilename
- else:
- includetext = ''
- if not header:
- header = ""
-
- lang, suffix, msg = _lang2suffix(language)
- if msg:
- context.Display("Cannot check for %s type: %s\n" % (type_name, msg))
- return msg
-
- # Remarks from autoconf about this test:
- # - Grepping for the type in include files is not reliable (grep isn't
- # portable anyway).
- # - Using "TYPE my_var;" doesn't work for const qualified types in C++.
- # Adding an initializer is not valid for some C++ classes.
- # - Using the type as parameter to a function either fails for K&$ C or for
- # C++.
- # - Using "TYPE *my_var;" is valid in C for some types that are not
- # declared (struct something).
- # - Using "sizeof(TYPE)" is valid when TYPE is actually a variable.
- # - Using the previous two together works reliably.
- text = """
-%(include)s
-%(header)s
-
-int main() {
- if ((%(name)s *) 0)
- return 0;
- if (sizeof (%(name)s))
- return 0;
-}
-""" % { 'include': includetext,
- 'header': header,
- 'name': type_name }
-
- context.Display("Checking for %s type %s... " % (lang, type_name))
- ret = context.BuildProg(text, suffix)
- _YesNoResult(context, ret, "HAVE_" + type_name, text,
- "Define to 1 if the system has the type `%s'." % type_name)
- if ret and fallback and context.headerfilename:
- f = open(context.headerfilename, "a")
- f.write("typedef %s %s;\n" % (fallback, type_name))
- f.close()
-
- return ret
-
-def CheckTypeSize(context, type_name, header = None, language = None, expect = None):
- """This check can be used to get the size of a given type, or to check whether
- the type is of expected size.
-
- Arguments:
- - type : str
- the type to check
- - includes : sequence
- list of headers to include in the test code before testing the type
- - language : str
- 'C' or 'C++'
- - expect : int
- if given, will test wether the type has the given number of bytes.
- If not given, will automatically find the size.
-
- Returns:
- status : int
- 0 if the check failed, or the found size of the type if the check succeeded."""
-
- # Include "confdefs.h" first, so that the header can use HAVE_HEADER_H.
- if context.headerfilename:
- includetext = '#include "%s"' % context.headerfilename
- else:
- includetext = ''
-
- if not header:
- header = ""
-
- lang, suffix, msg = _lang2suffix(language)
- if msg:
- context.Display("Cannot check for %s type: %s\n" % (type_name, msg))
- return msg
-
- src = includetext + header
- if not expect is None:
- # Only check if the given size is the right one
- context.Display('Checking %s is %d bytes... ' % (type_name, expect))
-
- # test code taken from autoconf: this is a pretty clever hack to find that
- # a type is of a given size using only compilation. This speeds things up
- # quite a bit compared to straightforward code using TryRun
- src = src + r"""
-typedef %s scons_check_type;
-
-int main()
-{
- static int test_array[1 - 2 * !(((long int) (sizeof(scons_check_type))) == %d)];
- test_array[0] = 0;
-
- return 0;
-}
-"""
-
- st = context.CompileProg(src % (type_name, expect), suffix)
- if not st:
- context.Display("yes\n")
- _Have(context, "SIZEOF_%s" % type_name, expect,
- "The size of `%s', as computed by sizeof." % type_name)
- return expect
- else:
- context.Display("no\n")
- _LogFailed(context, src, st)
- return 0
- else:
- # Only check if the given size is the right one
- context.Message('Checking size of %s ... ' % type_name)
-
- # We have to be careful with the program we wish to test here since
- # compilation will be attempted using the current environment's flags.
- # So make sure that the program will compile without any warning. For
- # example using: 'int main(int argc, char** argv)' will fail with the
- # '-Wall -Werror' flags since the variables argc and argv would not be
- # used in the program...
- #
- src = src + """
-#include <stdlib.h>
-#include <stdio.h>
-int main() {
- printf("%d", (int)sizeof(""" + type_name + """));
- return 0;
-}
- """
- st, out = context.RunProg(src, suffix)
- try:
- size = int(out)
- except ValueError:
- # If cannot convert output of test prog to an integer (the size),
- # something went wront, so just fail
- st = 1
- size = 0
-
- if not st:
- context.Display("yes\n")
- _Have(context, "SIZEOF_%s" % type_name, size,
- "The size of `%s', as computed by sizeof." % type_name)
- return size
- else:
- context.Display("no\n")
- _LogFailed(context, src, st)
- return 0
-
- return 0
-
-def CheckDeclaration(context, symbol, includes = None, language = None):
- """Checks whether symbol is declared.
-
- Use the same test as autoconf, that is test whether the symbol is defined
- as a macro or can be used as an r-value.
-
- Arguments:
- symbol : str
- the symbol to check
- includes : str
- Optional "header" can be defined to include a header file.
- language : str
- only C and C++ supported.
-
- Returns:
- status : bool
- True if the check failed, False if succeeded."""
-
- # Include "confdefs.h" first, so that the header can use HAVE_HEADER_H.
- if context.headerfilename:
- includetext = '#include "%s"' % context.headerfilename
- else:
- includetext = ''
-
- if not includes:
- includes = ""
-
- lang, suffix, msg = _lang2suffix(language)
- if msg:
- context.Display("Cannot check for declaration %s: %s\n" % (type_name, msg))
- return msg
-
- src = includetext + includes
- context.Display('Checking whether %s is declared... ' % symbol)
-
- src = src + r"""
-int main()
-{
-#ifndef %s
- (void) %s;
-#endif
- ;
- return 0;
-}
-""" % (symbol, symbol)
-
- st = context.CompileProg(src, suffix)
- _YesNoResult(context, st, "HAVE_DECL_" + symbol, src,
- "Set to 1 if %s is defined." % symbol)
- return st
-
-def CheckLib(context, libs, func_name = None, header = None,
- extra_libs = None, call = None, language = None, autoadd = 1,
- append = True):
- """
- Configure check for a C or C++ libraries "libs". Searches through
- the list of libraries, until one is found where the test succeeds.
- Tests if "func_name" or "call" exists in the library. Note: if it exists
- in another library the test succeeds anyway!
- Optional "header" can be defined to include a header file. If not given a
- default prototype for "func_name" is added.
- Optional "extra_libs" is a list of library names to be added after
- "lib_name" in the build command. To be used for libraries that "lib_name"
- depends on.
- Optional "call" replaces the call to "func_name" in the test code. It must
- consist of complete C statements, including a trailing ";".
- Both "func_name" and "call" arguments are optional, and in that case, just
- linking against the libs is tested.
- "language" should be "C" or "C++" and is used to select the compiler.
- Default is "C".
- Note that this uses the current value of compiler and linker flags, make
- sure $CFLAGS, $CPPFLAGS and $LIBS are set correctly.
- Returns an empty string for success, an error message for failure.
- """
- # Include "confdefs.h" first, so that the header can use HAVE_HEADER_H.
- if context.headerfilename:
- includetext = '#include "%s"' % context.headerfilename
- else:
- includetext = ''
- if not header:
- header = ""
-
- text = """
-%s
-%s""" % (includetext, header)
-
- # Add a function declaration if needed.
- if func_name and func_name != "main":
- if not header:
- text = text + """
-#ifdef __cplusplus
-extern "C"
-#endif
-char %s();
-""" % func_name
-
- # The actual test code.
- if not call:
- call = "%s();" % func_name
-
- # if no function to test, leave main() blank
- text = text + """
-int
-main() {
- %s
-return 0;
-}
-""" % (call or "")
-
- if call:
- i = call.find("\n")
- if i > 0:
- calltext = call[:i] + ".."
- elif call[-1] == ';':
- calltext = call[:-1]
- else:
- calltext = call
-
- for lib_name in libs:
-
- lang, suffix, msg = _lang2suffix(language)
- if msg:
- context.Display("Cannot check for library %s: %s\n" % (lib_name, msg))
- return msg
-
- # if a function was specified to run in main(), say it
- if call:
- context.Display("Checking for %s in %s library %s... "
- % (calltext, lang, lib_name))
- # otherwise, just say the name of library and language
- else:
- context.Display("Checking for %s library %s... "
- % (lang, lib_name))
-
- if lib_name:
- l = [ lib_name ]
- if extra_libs:
- l.extend(extra_libs)
- if append:
- oldLIBS = context.AppendLIBS(l)
- else:
- oldLIBS = context.PrependLIBS(l)
- sym = "HAVE_LIB" + lib_name
- else:
- oldLIBS = -1
- sym = None
-
- ret = context.BuildProg(text, suffix)
-
- _YesNoResult(context, ret, sym, text,
- "Define to 1 if you have the `%s' library." % lib_name)
- if oldLIBS != -1 and (ret or not autoadd):
- context.SetLIBS(oldLIBS)
-
- if not ret:
- return ret
-
- return ret
-
-#
-# END OF PUBLIC FUNCTIONS
-#
-
-def _YesNoResult(context, ret, key, text, comment = None):
- """
- Handle the result of a test with a "yes" or "no" result.
- "ret" is the return value: empty if OK, error message when not.
- "key" is the name of the symbol to be defined (HAVE_foo).
- "text" is the source code of the program used for testing.
- "comment" is the C comment to add above the line defining the symbol (the
- comment is automatically put inside a /* */). If None, no comment is added.
- """
- if key:
- _Have(context, key, not ret, comment)
- if ret:
- context.Display("no\n")
- _LogFailed(context, text, ret)
- else:
- context.Display("yes\n")
-
-
-def _Have(context, key, have, comment = None):
- """
- Store result of a test in context.havedict and context.headerfilename.
- "key" is a "HAVE_abc" name. It is turned into all CAPITALS and non-
- alphanumerics are replaced by an underscore.
- The value of "have" can be:
- 1 - Feature is defined, add "#define key".
- 0 - Feature is not defined, add "/* #undef key */".
- Adding "undef" is what autoconf does. Not useful for the
- compiler, but it shows that the test was done.
- number - Feature is defined to this number "#define key have".
- Doesn't work for 0 or 1, use a string then.
- string - Feature is defined to this string "#define key have".
- Give "have" as is should appear in the header file, include quotes
- when desired and escape special characters!
- """
- key_up = key.upper()
- key_up = re.sub('[^A-Z0-9_]', '_', key_up)
- context.havedict[key_up] = have
- if have == 1:
- line = "#define %s 1\n" % key_up
- elif have == 0:
- line = "/* #undef %s */\n" % key_up
- elif isinstance(have, IntType):
- line = "#define %s %d\n" % (key_up, have)
- else:
- line = "#define %s %s\n" % (key_up, str(have))
-
- if comment is not None:
- lines = "\n/* %s */\n" % comment + line
- else:
- lines = "\n" + line
-
- if context.headerfilename:
- f = open(context.headerfilename, "a")
- f.write(lines)
- f.close()
- elif hasattr(context,'config_h'):
- context.config_h = context.config_h + lines
-
-
-def _LogFailed(context, text, msg):
- """
- Write to the log about a failed program.
- Add line numbers, so that error messages can be understood.
- """
- if LogInputFiles:
- context.Log("Failed program was:\n")
- lines = text.split('\n')
- if len(lines) and lines[-1] == '':
- lines = lines[:-1] # remove trailing empty line
- n = 1
- for line in lines:
- context.Log("%d: %s\n" % (n, line))
- n = n + 1
- if LogErrorMessages:
- context.Log("Error message: %s\n" % msg)
-
-
-def _lang2suffix(lang):
- """
- Convert a language name to a suffix.
- When "lang" is empty or None C is assumed.
- Returns a tuple (lang, suffix, None) when it works.
- For an unrecognized language returns (None, None, msg).
- Where:
- lang = the unified language name
- suffix = the suffix, including the leading dot
- msg = an error message
- """
- if not lang or lang in ["C", "c"]:
- return ("C", ".c", None)
- if lang in ["c++", "C++", "cpp", "CXX", "cxx"]:
- return ("C++", ".cpp", None)
-
- return None, None, "Unsupported language: %s" % lang
-
-
-# vim: set sw=4 et sts=4 tw=79 fo+=l:
-
-# Local Variables:
-# tab-width:4
-# indent-tabs-mode:nil
-# End:
-# vim: set expandtab tabstop=4 shiftwidth=4: