# 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.
+# 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.
+# can be used, it is passed to SetLIBS() later.)
#
# context.headerfilename
# Name of file to append configure results to, usually
#
import re
-import string
from types import IntType
#
_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):
"""
context.Display("Checking for %s function %s()... " % (lang, function_name))
ret = context.BuildProg(text, suffix)
- _YesNoResult(context, ret, "HAVE_" + function_name, text)
+ _YesNoResult(context, ret, "HAVE_" + function_name, text,
+ "Define to 1 if the system has the function `%s'." %\
+ function_name)
return ret
context.Display("Checking for %s header file %s... " % (lang, header_name))
ret = context.CompileProg(text, suffix)
- _YesNoResult(context, ret, "HAVE_" + header_name, text)
+ _YesNoResult(context, ret, "HAVE_" + header_name, text,
+ "Define to 1 if you have the <%s> header file." % header_name)
return ret
context.Display("Checking for %s type %s... " % (lang, type_name))
ret = context.BuildProg(text, suffix)
- _YesNoResult(context, ret, "HAVE_" + type_name, text)
+ _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))
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):
+ 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.
sure $CFLAGS, $CPPFLAGS and $LIBS are set correctly.
Returns an empty string for success, an error message for failure.
"""
- from SCons.Debug import Trace
# Include "confdefs.h" first, so that the header can use HAVE_HEADER_H.
if context.headerfilename:
includetext = '#include "%s"' % context.headerfilename
""" % (call or "")
if call:
- i = string.find(call, "\n")
+ i = call.find("\n")
if i > 0:
calltext = call[:i] + ".."
elif call[-1] == ';':
l = [ lib_name ]
if extra_libs:
l.extend(extra_libs)
- oldLIBS = context.AppendLIBS(l)
+ if append:
+ oldLIBS = context.AppendLIBS(l)
+ else:
+ oldLIBS = context.PrependLIBS(l)
sym = "HAVE_LIB" + lib_name
else:
oldLIBS = -1
ret = context.BuildProg(text, suffix)
- _YesNoResult(context, ret, sym, text)
+ _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)
# END OF PUBLIC FUNCTIONS
#
-def _YesNoResult(context, ret, key, text):
+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)
+ _Have(context, key, not ret, comment)
if ret:
context.Display("no\n")
_LogFailed(context, text, ret)
context.Display("yes\n")
-def _Have(context, key, have):
+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-
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 = key.upper()
key_up = re.sub('[^A-Z0-9_]', '_', key_up)
context.havedict[key_up] = have
if have == 1:
- line = "#define %s\n" % key_up
+ line = "#define %s 1\n" % key_up
elif have == 0:
line = "/* #undef %s */\n" % key_up
- elif type(have) == IntType:
+ 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(line)
+ f.write(lines)
f.close()
elif hasattr(context,'config_h'):
- context.config_h = context.config_h + line
+ context.config_h = context.config_h + lines
def _LogFailed(context, text, msg):
"""
if LogInputFiles:
context.Log("Failed program was:\n")
- lines = string.split(text, '\n')
+ lines = text.split('\n')
if len(lines) and lines[-1] == '':
lines = lines[:-1] # remove trailing empty line
n = 1
# 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:
projects / scons.git / blobdiff