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Diffstat (limited to 'buildtools/wafsamba/samba_autoconf.py')
| -rw-r--r-- | buildtools/wafsamba/samba_autoconf.py | 1001 |
1 files changed, 1001 insertions, 0 deletions
diff --git a/buildtools/wafsamba/samba_autoconf.py b/buildtools/wafsamba/samba_autoconf.py new file mode 100644 index 0000000..2e00f52 --- /dev/null +++ b/buildtools/wafsamba/samba_autoconf.py @@ -0,0 +1,1001 @@ +# a waf tool to add autoconf-like macros to the configure section + +import os, sys +from waflib import Build, Options, Logs, Context +from waflib.Configure import conf +from waflib.TaskGen import feature +from waflib.Tools import c_preproc as preproc +from samba_utils import TO_LIST, GET_TARGET_TYPE, SET_TARGET_TYPE, unique_list, mkdir_p + +missing_headers = set() + +#################################################### +# some autoconf like helpers, to make the transition +# to waf a bit easier for those used to autoconf +# m4 files + +@conf +def DEFINE(conf, d, v, add_to_cflags=False, quote=False): + '''define a config option''' + conf.define(d, v, quote=quote) + if add_to_cflags: + conf.env.append_value('CFLAGS', '-D%s=%s' % (d, str(v))) + +def hlist_to_string(conf, headers=None): + '''convert a headers list to a set of #include lines''' + hlist = conf.env.hlist + if headers: + hlist = hlist[:] + hlist.extend(TO_LIST(headers)) + hdrs = "\n".join('#include <%s>' % h for h in hlist) + + return hdrs + + +@conf +def COMPOUND_START(conf, msg): + '''start a compound test''' + def null_check_message_1(self,*k,**kw): + return + def null_check_message_2(self,*k,**kw): + return + + v = getattr(conf.env, 'in_compound', []) + if v != [] and v != 0: + conf.env.in_compound = v + 1 + return + conf.start_msg(msg) + conf.saved_check_message_1 = conf.start_msg + conf.start_msg = null_check_message_1 + conf.saved_check_message_2 = conf.end_msg + conf.end_msg = null_check_message_2 + conf.env.in_compound = 1 + + +@conf +def COMPOUND_END(conf, result): + '''start a compound test''' + conf.env.in_compound -= 1 + if conf.env.in_compound != 0: + return + conf.start_msg = conf.saved_check_message_1 + conf.end_msg = conf.saved_check_message_2 + p = conf.end_msg + if result is True: + p('ok') + elif not result: + p('not found', 'YELLOW') + else: + p(result) + + +@feature('nolink') +def nolink(self): + '''using the nolink type in conf.check() allows us to avoid + the link stage of a test, thus speeding it up for tests + that where linking is not needed''' + pass + + +def CHECK_HEADER(conf, h, add_headers=False, lib=None): + '''check for a header''' + if h in missing_headers and lib is None: + return False + d = h.upper().replace('/', '_') + d = d.replace('.', '_') + d = d.replace('-', '_') + d = 'HAVE_%s' % d + if CONFIG_SET(conf, d): + if add_headers: + if not h in conf.env.hlist: + conf.env.hlist.append(h) + return True + + (ccflags, ldflags, cpppath) = library_flags(conf, lib) + + hdrs = hlist_to_string(conf, headers=h) + if lib is None: + lib = "" + ret = conf.check(fragment='%s\nint main(void) { return 0; }\n' % hdrs, + type='nolink', + execute=0, + cflags=ccflags, + mandatory=False, + includes=cpppath, + uselib=lib.upper(), + msg="Checking for header %s" % h) + if not ret: + missing_headers.add(h) + return False + + conf.DEFINE(d, 1) + if add_headers and not h in conf.env.hlist: + conf.env.hlist.append(h) + return ret + + +@conf +def CHECK_HEADERS(conf, headers, add_headers=False, together=False, lib=None): + '''check for a list of headers + + when together==True, then the headers accumulate within this test. + This is useful for interdependent headers + ''' + ret = True + if not add_headers and together: + saved_hlist = conf.env.hlist[:] + set_add_headers = True + else: + set_add_headers = add_headers + for hdr in TO_LIST(headers): + if not CHECK_HEADER(conf, hdr, set_add_headers, lib=lib): + ret = False + if not add_headers and together: + conf.env.hlist = saved_hlist + return ret + + +def header_list(conf, headers=None, lib=None): + '''form a list of headers which exist, as a string''' + hlist=[] + if headers is not None: + for h in TO_LIST(headers): + if CHECK_HEADER(conf, h, add_headers=False, lib=lib): + hlist.append(h) + return hlist_to_string(conf, headers=hlist) + + +@conf +def CHECK_TYPE(conf, t, alternate=None, headers=None, define=None, lib=None, msg=None, cflags=''): + '''check for a single type''' + if define is None: + define = 'HAVE_' + t.upper().replace(' ', '_') + if msg is None: + msg='Checking for %s' % t + ret = CHECK_CODE(conf, '%s _x' % t, + define, + execute=False, + headers=headers, + local_include=False, + msg=msg, + cflags=cflags, + lib=lib, + link=False) + if not ret and alternate: + conf.DEFINE(t, alternate) + return ret + + +@conf +def CHECK_TYPES(conf, list, headers=None, define=None, alternate=None, lib=None): + '''check for a list of types''' + ret = True + for t in TO_LIST(list): + if not CHECK_TYPE(conf, t, headers=headers, + define=define, alternate=alternate, lib=lib): + ret = False + return ret + + +@conf +def CHECK_TYPE_IN(conf, t, headers=None, alternate=None, define=None, cflags=''): + '''check for a single type with a header''' + return CHECK_TYPE(conf, t, headers=headers, alternate=alternate, define=define, cflags=cflags) + + +@conf +def CHECK_VARIABLE(conf, v, define=None, always=False, + headers=None, msg=None, lib=None, + mandatory=False): + '''check for a variable declaration (or define)''' + if define is None: + define = 'HAVE_%s' % v.upper() + + if msg is None: + msg="Checking for variable %s" % v + + return CHECK_CODE(conf, + # we need to make sure the compiler doesn't + # optimize it out... + ''' + #ifndef %s + void *_x; _x=(void *)&%s; return (int)_x; + #endif + return 0 + ''' % (v, v), + execute=False, + link=False, + msg=msg, + local_include=False, + lib=lib, + headers=headers, + define=define, + mandatory=mandatory, + always=always) + + +@conf +def CHECK_DECLS(conf, vars, reverse=False, headers=None, lib=None, always=False): + '''check a list of variable declarations, using the HAVE_DECL_xxx form + of define + + When reverse==True then use HAVE_xxx_DECL instead of HAVE_DECL_xxx + ''' + ret = True + for v in TO_LIST(vars): + if not reverse: + define='HAVE_DECL_%s' % v.upper() + else: + define='HAVE_%s_DECL' % v.upper() + if not CHECK_VARIABLE(conf, v, + define=define, + headers=headers, + lib=lib, + msg='Checking for declaration of %s' % v, + always=always): + if not CHECK_CODE(conf, + ''' + return (int)%s; + ''' % (v), + execute=False, + link=False, + msg='Checking for declaration of %s (as enum)' % v, + local_include=False, + headers=headers, + lib=lib, + define=define, + always=always): + ret = False + return ret + + +def CHECK_FUNC(conf, f, link=True, lib=None, headers=None): + '''check for a function''' + define='HAVE_%s' % f.upper() + + ret = False + + in_lib_str = "" + if lib: + in_lib_str = " in %s" % lib + conf.COMPOUND_START('Checking for %s%s' % (f, in_lib_str)) + + if link is None or link: + ret = CHECK_CODE(conf, + # this is based on the autoconf strategy + ''' + #define %s __fake__%s + #ifdef HAVE_LIMITS_H + # include <limits.h> + #else + # include <assert.h> + #endif + #undef %s + #if defined __stub_%s || defined __stub___%s + #error "bad glibc stub" + #endif + extern char %s(); + int main() { return %s(); } + ''' % (f, f, f, f, f, f, f), + execute=False, + link=True, + addmain=False, + add_headers=False, + define=define, + local_include=False, + lib=lib, + headers=headers, + msg='Checking for %s' % f) + + if not ret: + ret = CHECK_CODE(conf, + # it might be a macro + # we need to make sure the compiler doesn't + # optimize it out... + 'void *__x = (void *)%s; return (int)__x' % f, + execute=False, + link=True, + addmain=True, + add_headers=True, + define=define, + local_include=False, + lib=lib, + headers=headers, + msg='Checking for macro %s' % f) + + if not ret and (link is None or not link): + ret = CHECK_VARIABLE(conf, f, + define=define, + headers=headers, + msg='Checking for declaration of %s' % f) + conf.COMPOUND_END(ret) + return ret + + +@conf +def CHECK_FUNCS(conf, list, link=True, lib=None, headers=None): + '''check for a list of functions''' + ret = True + for f in TO_LIST(list): + if not CHECK_FUNC(conf, f, link=link, lib=lib, headers=headers): + ret = False + return ret + + +@conf +def CHECK_SIZEOF(conf, vars, headers=None, define=None, critical=True): + '''check the size of a type''' + for v in TO_LIST(vars): + v_define = define + ret = False + if v_define is None: + v_define = 'SIZEOF_%s' % v.upper().replace(' ', '_') + for size in list((1, 2, 4, 8, 16, 32, 64)): + if CHECK_CODE(conf, + 'static int test_array[1 - 2 * !(((long int)(sizeof(%s))) <= %d)];' % (v, size), + define=v_define, + quote=False, + headers=headers, + local_include=False, + msg="Checking if size of %s == %d" % (v, size)): + conf.DEFINE(v_define, size) + ret = True + break + if not ret and critical: + Logs.error("Couldn't determine size of '%s'" % v) + sys.exit(1) + return ret + +@conf +def CHECK_SIGN(conf, v, headers=None): + '''check the sign of a type''' + define_name = v.upper().replace(' ', '_') + for op, signed in [('<', 'signed'), + ('>', 'unsigned')]: + if CHECK_CODE(conf, + f'static int test_array[1 - 2 * !((({v})-1) {op} 0)];', + define=f'{define_name}_{signed.upper()}', + quote=False, + headers=headers, + local_include=False, + msg=f"Checking if '{v}' is {signed}"): + return True + + return False + +@conf +def CHECK_VALUEOF(conf, v, headers=None, define=None): + '''check the value of a variable/define''' + ret = True + v_define = define + if v_define is None: + v_define = 'VALUEOF_%s' % v.upper().replace(' ', '_') + if CHECK_CODE(conf, + 'printf("%%u", (unsigned)(%s))' % v, + define=v_define, + execute=True, + define_ret=True, + quote=False, + headers=headers, + local_include=False, + msg="Checking value of %s" % v): + return int(conf.env[v_define]) + + return None + +@conf +def CHECK_CODE(conf, code, define, + always=False, execute=False, addmain=True, + add_headers=True, mandatory=False, + headers=None, msg=None, cflags='', includes='# .', + local_include=True, lib=None, link=True, + define_ret=False, quote=False, + on_target=True, strict=False): + '''check if some code compiles and/or runs''' + + if CONFIG_SET(conf, define): + return True + + if headers is not None: + CHECK_HEADERS(conf, headers=headers, lib=lib) + + if add_headers: + hdrs = header_list(conf, headers=headers, lib=lib) + else: + hdrs = '' + if execute: + execute = 1 + else: + execute = 0 + + if addmain: + fragment='%s\n int main(void) { %s; return 0; }\n' % (hdrs, code) + else: + fragment='%s\n%s\n' % (hdrs, code) + + if msg is None: + msg="Checking for %s" % define + + cflags = TO_LIST(cflags) + + # Be strict when relying on a compiler check + # Some compilers (e.g. xlc) ignore non-supported features as warnings + if strict: + if 'WERROR_CFLAGS' in conf.env: + cflags.extend(conf.env['WERROR_CFLAGS']) + + if local_include: + cflags.append('-I%s' % conf.path.abspath()) + + if not link: + type='nolink' + else: + type='cprogram' + + uselib = TO_LIST(lib) + + (ccflags, ldflags, cpppath) = library_flags(conf, uselib) + + includes = TO_LIST(includes) + includes.extend(cpppath) + + uselib = [l.upper() for l in uselib] + + cflags.extend(ccflags) + + if on_target: + test_args = conf.SAMBA_CROSS_ARGS(msg=msg) + else: + test_args = [] + + conf.COMPOUND_START(msg) + + try: + ret = conf.check(fragment=fragment, + execute=execute, + define_name = define, + cflags=cflags, + ldflags=ldflags, + includes=includes, + uselib=uselib, + type=type, + msg=msg, + quote=quote, + test_args=test_args, + define_ret=define_ret) + except Exception: + if always: + conf.DEFINE(define, 0) + else: + conf.undefine(define) + conf.COMPOUND_END(False) + if mandatory: + raise + return False + else: + # Success is indicated by ret but we should unset + # defines set by WAF's c_config.check() because it + # defines it to int(ret) and we want to undefine it + if not ret: + conf.undefine(define) + conf.COMPOUND_END(False) + return False + if not define_ret: + conf.DEFINE(define, 1) + conf.COMPOUND_END(True) + else: + conf.DEFINE(define, ret, quote=quote) + conf.COMPOUND_END(ret) + return True + + +@conf +def CHECK_STRUCTURE_MEMBER(conf, structname, member, + always=False, define=None, headers=None, + lib=None): + '''check for a structure member''' + if define is None: + define = 'HAVE_%s' % member.upper() + return CHECK_CODE(conf, + '%s s; void *_x; _x=(void *)&s.%s' % (structname, member), + define, + execute=False, + link=False, + lib=lib, + always=always, + headers=headers, + local_include=False, + msg="Checking for member %s in %s" % (member, structname)) + + +@conf +def CHECK_CFLAGS(conf, cflags, fragment='int main(void) { return 0; }\n', + mandatory=False): + '''check if the given cflags are accepted by the compiler + ''' + check_cflags = TO_LIST(cflags) + if 'WERROR_CFLAGS' in conf.env: + check_cflags.extend(conf.env['WERROR_CFLAGS']) + return conf.check(fragment=fragment, + execute=0, + mandatory=mandatory, + type='nolink', + cflags=check_cflags, + msg="Checking compiler accepts %s" % cflags) + +@conf +def CHECK_LDFLAGS(conf, ldflags, + mandatory=False): + '''check if the given ldflags are accepted by the linker + ''' + return conf.check(fragment='int main(void) { return 0; }\n', + execute=0, + ldflags=ldflags, + mandatory=mandatory, + msg="Checking linker accepts %s" % ldflags) + + +@conf +def CONFIG_GET(conf, option): + '''return True if a configuration option was found''' + if (option in conf.env): + return conf.env[option] + else: + return None + +@conf +def CONFIG_SET(conf, option): + '''return True if a configuration option was found''' + if option not in conf.env: + return False + v = conf.env[option] + if v is None: + return False + if v == []: + return False + if v == (): + return False + return True + +@conf +def CONFIG_RESET(conf, option): + if option not in conf.env: + return + del conf.env[option] + +Build.BuildContext.CONFIG_RESET = CONFIG_RESET +Build.BuildContext.CONFIG_SET = CONFIG_SET +Build.BuildContext.CONFIG_GET = CONFIG_GET + + +def library_flags(self, libs): + '''work out flags from pkg_config''' + ccflags = [] + ldflags = [] + cpppath = [] + for lib in TO_LIST(libs): + # note that we do not add the -I and -L in here, as that is added by the waf + # core. Adding it here would just change the order that it is put on the link line + # which can cause system paths to be added before internal libraries + extra_ccflags = TO_LIST(getattr(self.env, 'CFLAGS_%s' % lib.upper(), [])) + extra_ldflags = TO_LIST(getattr(self.env, 'LDFLAGS_%s' % lib.upper(), [])) + extra_cpppath = TO_LIST(getattr(self.env, 'CPPPATH_%s' % lib.upper(), [])) + ccflags.extend(extra_ccflags) + ldflags.extend(extra_ldflags) + cpppath.extend(extra_cpppath) + + extra_cpppath = TO_LIST(getattr(self.env, 'INCLUDES_%s' % lib.upper(), [])) + cpppath.extend(extra_cpppath) + if 'EXTRA_LDFLAGS' in self.env: + ldflags.extend(self.env['EXTRA_LDFLAGS']) + + ccflags = unique_list(ccflags) + ldflags = unique_list(ldflags) + cpppath = unique_list(cpppath) + return (ccflags, ldflags, cpppath) + + +@conf +def CHECK_LIB(conf, libs, mandatory=False, empty_decl=True, set_target=True, shlib=False): + '''check if a set of libraries exist as system libraries + + returns the sublist of libs that do exist as a syslib or [] + ''' + + fragment= ''' +int foo() +{ + int v = 2; + return v*2; +} +''' + ret = [] + liblist = TO_LIST(libs) + for lib in liblist[:]: + if GET_TARGET_TYPE(conf, lib) == 'SYSLIB': + ret.append(lib) + continue + + (ccflags, ldflags, cpppath) = library_flags(conf, lib) + if shlib: + res = conf.check(features='c cshlib', fragment=fragment, lib=lib, uselib_store=lib, cflags=ccflags, ldflags=ldflags, uselib=lib.upper(), mandatory=False) + else: + res = conf.check(lib=lib, uselib_store=lib, cflags=ccflags, ldflags=ldflags, uselib=lib.upper(), mandatory=False) + + if not res: + if mandatory: + Logs.error("Mandatory library '%s' not found for functions '%s'" % (lib, list)) + sys.exit(1) + if empty_decl: + # if it isn't a mandatory library, then remove it from dependency lists + if set_target: + SET_TARGET_TYPE(conf, lib, 'EMPTY') + else: + conf.define('HAVE_LIB%s' % lib.upper().replace('-','_').replace('.','_'), 1) + conf.env['LIB_' + lib.upper()] = lib + if set_target: + conf.SET_TARGET_TYPE(lib, 'SYSLIB') + ret.append(lib) + + return ret + + + +@conf +def CHECK_FUNCS_IN(conf, list, library, mandatory=False, checklibc=False, + headers=None, link=True, empty_decl=True, set_target=True): + """ + check that the functions in 'list' are available in 'library' + if they are, then make that library available as a dependency + + if the library is not available and mandatory==True, then + raise an error. + + If the library is not available and mandatory==False, then + add the library to the list of dependencies to remove from + build rules + + optionally check for the functions first in libc + """ + remaining = TO_LIST(list) + liblist = TO_LIST(library) + + # check if some already found + for f in remaining[:]: + if CONFIG_SET(conf, 'HAVE_%s' % f.upper()): + remaining.remove(f) + + # see if the functions are in libc + if checklibc: + for f in remaining[:]: + if CHECK_FUNC(conf, f, link=True, headers=headers): + remaining.remove(f) + + if remaining == []: + for lib in liblist: + if GET_TARGET_TYPE(conf, lib) != 'SYSLIB' and empty_decl: + SET_TARGET_TYPE(conf, lib, 'EMPTY') + return True + + checklist = conf.CHECK_LIB(liblist, empty_decl=empty_decl, set_target=set_target) + for lib in liblist[:]: + if not lib in checklist and mandatory: + Logs.error("Mandatory library '%s' not found for functions '%s'" % (lib, list)) + sys.exit(1) + + ret = True + for f in remaining: + if not CHECK_FUNC(conf, f, lib=' '.join(checklist), headers=headers, link=link): + ret = False + + return ret + + +@conf +def IN_LAUNCH_DIR(conf): + '''return True if this rule is being run from the launch directory''' + return os.path.realpath(conf.path.abspath()) == os.path.realpath(Context.launch_dir) +Options.OptionsContext.IN_LAUNCH_DIR = IN_LAUNCH_DIR + + +@conf +def SAMBA_CONFIG_H(conf, path=None): + '''write out config.h in the right directory''' + # we don't want to produce a config.h in places like lib/replace + # when we are building projects that depend on lib/replace + if not IN_LAUNCH_DIR(conf): + return + + # we need to build real code that can't be optimized away to test + stack_protect_list = ['-fstack-protector-strong', '-fstack-protector'] + for stack_protect_flag in stack_protect_list: + flag_supported = conf.check(fragment=''' + #include <stdio.h> + + int main(void) + { + char t[100000]; + while (fgets(t, sizeof(t), stdin)); + return 0; + } + ''', + execute=0, + cflags=[ '-Werror', '-Wp,-D_FORTIFY_SOURCE=2', stack_protect_flag], + mandatory=False, + msg='Checking if compiler accepts %s' % (stack_protect_flag)) + if flag_supported: + conf.ADD_CFLAGS('%s' % (stack_protect_flag)) + break + + flag_supported = conf.check(fragment=''' + #include <stdio.h> + + int main(void) + { + char t[100000]; + while (fgets(t, sizeof(t), stdin)); + return 0; + } + ''', + execute=0, + cflags=[ '-Werror', '-fstack-clash-protection'], + mandatory=False, + msg='Checking if compiler accepts -fstack-clash-protection') + if flag_supported: + conf.ADD_CFLAGS('-fstack-clash-protection') + + if Options.options.debug: + conf.ADD_CFLAGS('-g', testflags=True) + + if Options.options.pidl_developer: + conf.env.PIDL_DEVELOPER_MODE = True + + if Options.options.developer: + conf.env.DEVELOPER_MODE = True + + conf.ADD_CFLAGS('-g', testflags=True) + conf.ADD_CFLAGS('-Wall', testflags=True) + conf.ADD_CFLAGS('-Wshadow', testflags=True) + conf.ADD_CFLAGS('-Wmissing-prototypes', testflags=True) + if CHECK_CODE(conf, + 'struct a { int b; }; struct c { struct a d; } e = { };', + 'CHECK_C99_INIT', + link=False, + cflags='-Wmissing-field-initializers -Werror=missing-field-initializers', + msg="Checking C99 init of nested structs."): + conf.ADD_CFLAGS('-Wmissing-field-initializers', testflags=True) + conf.ADD_CFLAGS('-Wformat-overflow=2', testflags=True) + conf.ADD_CFLAGS('-Wformat-zero-length', testflags=True) + conf.ADD_CFLAGS('-Wcast-align -Wcast-qual', testflags=True) + conf.ADD_CFLAGS('-fno-common', testflags=True) + + conf.ADD_CFLAGS('-Werror=address', testflags=True) + # we add these here to ensure that -Wstrict-prototypes is not set during configure + conf.ADD_CFLAGS('-Werror=strict-prototypes -Wstrict-prototypes', + testflags=True) + conf.ADD_CFLAGS('-Werror=write-strings -Wwrite-strings', + testflags=True) + conf.ADD_CFLAGS('-Werror-implicit-function-declaration', + testflags=True) + conf.ADD_CFLAGS('-Werror=implicit-int', + testflags=True) + conf.ADD_CFLAGS('-Werror=pointer-arith -Wpointer-arith', + testflags=True) + conf.ADD_CFLAGS('-Werror=declaration-after-statement -Wdeclaration-after-statement', + testflags=True) + conf.ADD_CFLAGS('-Werror=return-type -Wreturn-type', + testflags=True) + conf.ADD_CFLAGS('-Werror=uninitialized -Wuninitialized', + testflags=True) + conf.ADD_CFLAGS('-Wimplicit-fallthrough', + testflags=True) + conf.ADD_CFLAGS('-Werror=strict-overflow -Wstrict-overflow=2', + testflags=True) + conf.ADD_CFLAGS('-Werror=old-style-definition -Wold-style-definition', + testflags=True) + + conf.ADD_CFLAGS('-Wformat=2 -Wno-format-y2k', testflags=True) + conf.ADD_CFLAGS('-Wno-format-zero-length', testflags=True) + conf.ADD_CFLAGS('-Werror=format-security -Wformat-security', + testflags=True, prereq_flags='-Wformat') + # This check is because for ldb_search(), a NULL format string + # is not an error, but some compilers complain about that. + if CHECK_CFLAGS(conf, ["-Werror=format", "-Wformat=2"], ''' +int testformat(char *format, ...) __attribute__ ((format (__printf__, 1, 2))); + +int main(void) { + testformat(0); + return 0; +} + +'''): + if not 'EXTRA_CFLAGS' in conf.env: + conf.env['EXTRA_CFLAGS'] = [] + conf.env['EXTRA_CFLAGS'].extend(TO_LIST("-Werror=format")) + + if CHECK_CFLAGS(conf, ["-Wno-error=array-bounds"]): + conf.define('HAVE_WNO_ERROR_ARRAY_BOUNDS', 1) + + if not Options.options.disable_warnings_as_errors: + conf.ADD_NAMED_CFLAGS('PICKY_CFLAGS', '-Werror -Wno-error=deprecated-declarations', testflags=True) + conf.ADD_NAMED_CFLAGS('PICKY_CFLAGS', '-Wno-error=tautological-compare', testflags=True) + conf.ADD_NAMED_CFLAGS('PICKY_CFLAGS', '-Wno-error=cast-align', testflags=True) + + if Options.options.fatal_errors: + conf.ADD_CFLAGS('-Wfatal-errors', testflags=True) + + if Options.options.pedantic: + conf.ADD_CFLAGS('-W', testflags=True) + + if (Options.options.address_sanitizer or + Options.options.undefined_sanitizer): + conf.ADD_CFLAGS('-g -O1', testflags=True) + if Options.options.address_sanitizer: + conf.ADD_CFLAGS('-fno-omit-frame-pointer', testflags=True) + conf.ADD_CFLAGS('-fsanitize=address', testflags=True) + conf.ADD_LDFLAGS('-fsanitize=address', testflags=True) + conf.env['ADDRESS_SANITIZER'] = True + if Options.options.undefined_sanitizer: + conf.ADD_CFLAGS('-fsanitize=undefined', testflags=True) + conf.ADD_CFLAGS('-fsanitize=null', testflags=True) + conf.ADD_CFLAGS('-fsanitize=alignment', testflags=True) + conf.ADD_LDFLAGS('-fsanitize=undefined', testflags=True) + conf.env['UNDEFINED_SANITIZER'] = True + + + # Let people pass an additional ADDITIONAL_{CFLAGS,LDFLAGS} + # environment variables which are only used the for final build. + # + # The CFLAGS and LDFLAGS environment variables are also + # used for the configure checks which might impact their results. + # + # If these variables don't pass a smoke test, fail the configure + + conf.add_os_flags('ADDITIONAL_CFLAGS') + if conf.env.ADDITIONAL_CFLAGS: + conf.CHECK_CFLAGS(conf.env['ADDITIONAL_CFLAGS'], + mandatory=True) + conf.env['EXTRA_CFLAGS'].extend(conf.env['ADDITIONAL_CFLAGS']) + + conf.add_os_flags('ADDITIONAL_LDFLAGS') + if conf.env.ADDITIONAL_LDFLAGS: + conf.CHECK_LDFLAGS(conf.env['ADDITIONAL_LDFLAGS'], + mandatory=True) + conf.env['EXTRA_LDFLAGS'].extend(conf.env['ADDITIONAL_LDFLAGS']) + + if path is None: + conf.write_config_header('default/config.h', top=True, remove=False) + else: + conf.write_config_header(os.path.join(conf.variant, path), remove=False) + for key in conf.env.define_key: + conf.undefine(key, from_env=False) + conf.env.define_key = [] + conf.SAMBA_CROSS_CHECK_COMPLETE() + + +@conf +def CONFIG_PATH(conf, name, default): + '''setup a configurable path''' + if not name in conf.env: + if default[0] == '/': + conf.env[name] = default + else: + conf.env[name] = conf.env['PREFIX'] + default + +@conf +def ADD_NAMED_CFLAGS(conf, name, flags, testflags=False, prereq_flags=[]): + '''add some CFLAGS to the command line + optionally set testflags to ensure all the flags work + ''' + prereq_flags = TO_LIST(prereq_flags) + if testflags: + ok_flags=[] + for f in flags.split(): + if CHECK_CFLAGS(conf, [f] + prereq_flags): + ok_flags.append(f) + flags = ok_flags + if not name in conf.env: + conf.env[name] = [] + conf.env[name].extend(TO_LIST(flags)) + +@conf +def ADD_CFLAGS(conf, flags, testflags=False, prereq_flags=[]): + '''add some CFLAGS to the command line + optionally set testflags to ensure all the flags work + ''' + ADD_NAMED_CFLAGS(conf, 'EXTRA_CFLAGS', flags, testflags=testflags, + prereq_flags=prereq_flags) + +@conf +def ADD_LDFLAGS(conf, flags, testflags=False): + '''add some LDFLAGS to the command line + optionally set testflags to ensure all the flags work + + this will return the flags that are added, if any + ''' + if testflags: + ok_flags=[] + for f in flags.split(): + if CHECK_LDFLAGS(conf, f): + ok_flags.append(f) + flags = ok_flags + if not 'EXTRA_LDFLAGS' in conf.env: + conf.env['EXTRA_LDFLAGS'] = [] + conf.env['EXTRA_LDFLAGS'].extend(TO_LIST(flags)) + return flags + + +@conf +def ADD_EXTRA_INCLUDES(conf, includes): + '''add some extra include directories to all builds''' + if not 'EXTRA_INCLUDES' in conf.env: + conf.env['EXTRA_INCLUDES'] = [] + conf.env['EXTRA_INCLUDES'].extend(TO_LIST(includes)) + + + +def CURRENT_CFLAGS(bld, target, cflags, + allow_warnings=False, + use_hostcc=False, + hide_symbols=False): + '''work out the current flags. local flags are added first''' + ret = [] + if use_hostcc: + ret += ['-D_SAMBA_HOSTCC_'] + ret += TO_LIST(cflags) + if not 'EXTRA_CFLAGS' in bld.env: + list = [] + else: + list = bld.env['EXTRA_CFLAGS']; + ret.extend(list) + if not allow_warnings and 'PICKY_CFLAGS' in bld.env: + list = bld.env['PICKY_CFLAGS']; + ret.extend(list) + if hide_symbols and bld.env.HAVE_VISIBILITY_ATTR: + ret.append(bld.env.VISIBILITY_CFLAGS) + return ret + + +@conf +def CHECK_CC_ENV(conf): + """trim whitespaces from 'CC'. + The build farm sometimes puts a space at the start""" + if os.environ.get('CC'): + conf.env.CC = TO_LIST(os.environ.get('CC')) + + +@conf +def SETUP_CONFIGURE_CACHE(conf, enable): + '''enable/disable cache of configure results''' + if enable: + # when -C is chosen, we will use a private cache and will + # not look into system includes. This roughtly matches what + # autoconf does with -C + cache_path = os.path.join(conf.bldnode.abspath(), '.confcache') + mkdir_p(cache_path) + Options.cache_global = os.environ['WAFCACHE'] = cache_path + else: + # when -C is not chosen we will not cache configure checks + # We set the recursion limit low to prevent waf from spending + # a lot of time on the signatures of the files. + Options.cache_global = os.environ['WAFCACHE'] = '' + preproc.recursion_limit = 1 + # in either case we don't need to scan system includes + preproc.go_absolute = False + + +@conf +def SAMBA_CHECK_UNDEFINED_SYMBOL_FLAGS(conf): + if Options.options.address_sanitizer or Options.options.enable_libfuzzer: + # Sanitizers can rely on symbols undefined at library link time and the + # symbols used for fuzzers are only defined by compiler wrappers. + return + + if not sys.platform.startswith("openbsd"): + # we don't want any libraries or modules to rely on runtime + # resolution of symbols + conf.env.undefined_ldflags = conf.ADD_LDFLAGS('-Wl,-no-undefined', testflags=True) + + if (conf.env.undefined_ignore_ldflags == [] and + conf.CHECK_LDFLAGS(['-undefined', 'dynamic_lookup'])): + conf.env.undefined_ignore_ldflags = ['-undefined', 'dynamic_lookup'] |