# -*- python -*-
"""
Check the build environment for CapiSuite

(c) Copyright 2004 by Hartmut Goebel <h.goebel@crazy-compilers.com>
"""

Import(['env'])

headerfilename = 'config.h'
havedict = {}

open(headerfilename, 'w') # clear file contents

###--- hack SCons.SConftest ---###

import SCons.Conftest, string
from types import IntType

transmap = string.maketrans(':./ ', '____')

def _Have(context, key, have):
    """
    Slightly modified version of SCons.Conftest._Have which uses
    global havedict and headerfilename instead of context.*. This is
    necessary until SCons support a way to actually use this feature.
    In addition this writes '#define ... 1'.
    """
    key_up = string.translate(string.upper(key), transmap)
    havedict[key_up] = have
    if headerfilename:
        f = open(headerfilename, "a")
        if have == 1:
            f.write("#define %s 1\n" % key_up)
        elif have == 0:
            f.write("/* #undef %s */\n" % key_up)
        elif type(have) == IntType:
            f.write("#define %s %d\n" % (key_up, have))
        else:
            f.write('#define %s "%s"\n' % (key_up, str(have)))
        f.close()
        
# need to monkey-patch it into SCons.Conftest :-(
SCons.Conftest._Have = _Have

_Have(None, 'PACKAGE', env['PACKAGE'])
_Have(None, 'VERSION', env['VERSION'])

## these were defined by auto-rools but are unused:
## #define PACKAGE_BUGREPORT ""
## #define PACKAGE_NAME ""
## #define PACKAGE_STRING ""
## #define PACKAGE_TARNAME ""
## #define PACKAGE_VERSION ""

###--- autoconf-like checks ---###
### these tests are build like the corresponding autoconf tests

def CheckHeadersStdC(context):
    context.Message("Checking for ANSI C header files ... ")
    text = """
        #include <stdlib.h>
        #include <stdarg.h>
        #include <string.h>
        #include <float.h>
    \n"""
    # Some tests for SunOS 4.x, ISC 2.0.2 and Irix-4.0.5 skipped here,
    # since CapiSuite requires Linux anway.
    ret = context.CompileProg(text, '.cpp')
    SCons.Conftest._YesNoResult(context, ret, "STDC_HEADERS", text)
    context.did_show_result = 1
    return ret

def CheckHeaderTime(context):
    context.Display("Checking whether time.h and sys/time.h may both be "
                    "included ... ")
    text = """
        #include <sys/types.h>
        #include <sys/time.h>
        #include <time.h>

        int main() {
          if ((struct tm *) 0) return 0;
          return 0;
        }
        \n"""
    ret = context.CompileProg(text, '.cpp')
    SCons.Conftest._YesNoResult(context, ret, "TIME_WITH_SYS_TIME", text)
    context.did_show_result = 1
    return ret

###--- custom checks for CapiSuite ---###

def CheckStringClear(context):
    context.Display('Checking for string::clear method ... ')
    text = """
        #include <string>
        int main() {
            std::string a; a.clear();
        }
        \n"""
    ret = context.CompileProg(text, '.cpp')
    SCons.Conftest._YesNoResult(context, ret, "HAVE_STRING_CLEAR", text)
    context.did_show_result = 1
    return ret

# capisuite special test
def CheckCapiALERT_REQ(context):
    context.Display('Checking for new ALERT_REQ signature in capiutils.h ... ')
    text = """
        #include <capiutils.h>
        int main() {
            ALERT_REQ (NULL, 0, 0, 0, NULL, NULL, NULL, NULL, NULL);
        }
        \n"""
    ret = context.CompileProg(text, '.cpp')
    SCons.Conftest._YesNoResult(context, ret, "HAVE_NEW_CAPI4LINUX", text)
    context.did_show_result = 1
    return ret


conf = Configure(env,
                 custom_tests = {'CheckHeadersStdC': CheckHeadersStdC,
                                 'CheckHeaderTime': CheckHeaderTime,
                                 'CheckStringClear': CheckStringClear,
                                 'CheckCapiALERT_REQ': CheckCapiALERT_REQ,
                                 },
                 conf_dir = '.sconf_temp', # no '#' to build in build-dir
                 log_file = 'config.log'   # no '#' to build in build-dir
                 )

conf.CheckHeadersStdC()

missing = 0
for h in Split("sys/types.h sys/stat.h stdlib.h string.h "
               "memory.h strings.h inttypes.h stdint.h unistd.h"):
    missing += not conf.CheckHeader(h, language='C++')
if missing:
    print 'Required headers missing - aborting.'
    Exit(5)

conf.CheckFunc('gettimeofday', language='C++')
conf.CheckHeader('sys/time.h', language='C++')
conf.CheckHeaderTime()

###--- CapiSuite specials ---###

# CS_TEST_GCC3
# new gcc3 feature: we can #include<ostream> instead of ostream.h
conf.CheckHeader('ostream', language='C++') 
conf.CheckStringClear() # checking for string::clear method

conf.CheckCapiALERT_REQ() # CS_TEST_CAPI4LINUX
# CS_TEST_SFFTOBMP is implemented in SConstruct.Get_sfftobmp_Version
# CS_SET_DOCDIR is implemented in SConscript-Options

###--- libs required by CapiSuite ---###
# checking for capi20_register in -lcapi20... yes
if not conf.CheckLib('capi20', 'capi20_register', language='C++'):
    print 'libcapi20 not found - aborting'
    Exit(5)

# checking for pthread_create in -lpthread... yes
if not conf.CheckLib('pthread', 'pthread_create', language='C++'):
    print 'libpthread not found - aborting'
    Exit(5)

# todo
#  Which(doxygen)
#  Which(pychecker)

conf.Finish()


"""
These are the checks 'configure' does

Legende:
- not neccessary
+ Scons build-in
? unsure
~ implemented in SConscript/SConstruct

-checking for a BSD-compatible install... /usr//bin/install -c
-checking whether build environment is sane... yes
-checking for gawk... gawk
-checking whether make sets $(MAKE)... yes
+checking for gcc... gcc
+checking for C compiler default output... a.out
+checking whether the C compiler works... yes
?checking whether we are cross compiling... no
+checking for suffix of executables...
+checking for suffix of object files... o
?checking whether we are using the GNU C compiler... yes
?checking whether gcc accepts -g... yes
?checking for gcc option to accept ANSI C... none needed
-checking for style of include used by make... GNU
-checking dependency style of gcc... gcc3

+checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
-checking dependency style of g++... gcc3
-checking for a BSD-compatible install... /usr//bin/install -c
+checking for ranlib... ranlib
-checking whether make sets $(MAKE)... (cached) yes
+checking how to run the C++ preprocessor... g++ -E
-checking for egrep... grep -E
"""