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authorLuca Falavigna <dktrkranz@debian.org>2010-01-02 20:56:35 +0100
committerLuca Falavigna <dktrkranz@debian.org>2010-01-02 20:56:35 +0100
commit64c458487151933ee0ba093cf4ac69e177d9be37 (patch)
treef6e3755704f53406eea85532e4ffe5d5ef50b7f0 /src/engine/SCons/Conftest.py
parent2aec9cc58398cac1376509a7d75edb83b41f984e (diff)
parent72c578fd4b0b4a5a43e18594339ac4ff26c376dc (diff)
Merge commit 'upstream/1.2.0.d20091224'
Diffstat (limited to 'src/engine/SCons/Conftest.py')
-rw-r--r--src/engine/SCons/Conftest.py794
1 files changed, 794 insertions, 0 deletions
diff --git a/src/engine/SCons/Conftest.py b/src/engine/SCons/Conftest.py
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+"""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
+import string
+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 not context.env.has_key(comp) 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 = string.find(call, "\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 = string.upper(key)
+ 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 type(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 = string.split(text, '\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: