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config.cpp
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/*******************************************************************\
Module:
Author: Daniel Kroening, [email protected]
\*******************************************************************/
#include "config.h"
#include "arith_tools.h"
#include "cmdline.h"
#include "cprover_prefix.h"
#include "exception_utils.h"
#include "namespace.h"
#include "pointer_expr.h"
#include "simplify_expr.h"
#include "string2int.h"
#include "string_utils.h"
#include "symbol_table_base.h"
#include <climits>
#include <cstdlib>
configt config;
void configt::ansi_ct::set_16()
{
set_LP32();
}
void configt::ansi_ct::set_32()
{
set_ILP32();
}
void configt::ansi_ct::set_64()
{
#ifdef _WIN32
set_LLP64();
#else
set_LP64();
#endif
}
/// int=32, long=64, pointer=64
void configt::ansi_ct::set_LP64()
{
bool_width=1*8;
int_width=4*8;
long_int_width=8*8;
char_width=1*8;
short_int_width=2*8;
long_long_int_width=8*8;
pointer_width=8*8;
single_width=4*8;
double_width=8*8;
long_double_width=16*8;
char_is_unsigned=false;
wchar_t_is_unsigned=false;
wchar_t_width=4*8;
alignment=1;
memory_operand_size=int_width/8;
}
/// int=64, long=64, pointer=64
// TODO: find the alignment restrictions (per type) of the different
// architectures (currently: sizeof=alignedof)
// TODO: implement the __attribute__((__aligned__(val)))
void configt::ansi_ct::set_ILP64()
{
bool_width=1*8;
int_width=8*8;
long_int_width=8*8;
char_width=1*8;
short_int_width=2*8;
long_long_int_width=8*8;
pointer_width=8*8;
single_width=4*8;
double_width=8*8;
long_double_width=8*8;
char_is_unsigned=false;
wchar_t_is_unsigned=false;
wchar_t_width=4*8;
alignment=1;
memory_operand_size=int_width/8;
}
/// int=32, long=32, pointer=64
void configt::ansi_ct::set_LLP64()
{
bool_width=1*8;
int_width=4*8;
long_int_width=4*8;
char_width=1*8;
short_int_width=2*8;
long_long_int_width=8*8;
pointer_width=8*8;
single_width=4*8;
double_width=8*8;
long_double_width=8*8;
char_is_unsigned=false;
wchar_t_is_unsigned=false;
wchar_t_width=4*8;
alignment=1;
memory_operand_size=int_width/8;
}
/// int=32, long=32, pointer=32
void configt::ansi_ct::set_ILP32()
{
bool_width=1*8;
int_width=4*8;
long_int_width=4*8;
char_width=1*8;
short_int_width=2*8;
long_long_int_width=8*8;
pointer_width=4*8;
single_width=4*8;
double_width=8*8;
long_double_width=12*8; // really 96 bits on GCC
char_is_unsigned=false;
wchar_t_is_unsigned=false;
wchar_t_width=4*8;
alignment=1;
memory_operand_size=int_width/8;
}
/// int=16, long=32, pointer=32
void configt::ansi_ct::set_LP32()
{
bool_width=1*8;
int_width=2*8;
long_int_width=4*8;
char_width=1*8;
short_int_width=2*8;
long_long_int_width=8*8;
pointer_width=4*8;
single_width=4*8;
double_width=8*8;
long_double_width=8*8;
char_is_unsigned=false;
wchar_t_is_unsigned=false;
wchar_t_width=4*8;
alignment=1;
memory_operand_size=int_width/8;
}
void configt::ansi_ct::set_arch_spec_i386()
{
set_ILP32();
endianness=endiannesst::IS_LITTLE_ENDIAN;
char_is_unsigned=false;
NULL_is_zero=true;
switch(mode)
{
case flavourt::GCC:
case flavourt::CLANG:
defines.push_back("i386");
defines.push_back("__i386");
defines.push_back("__i386__");
if(mode == flavourt::CLANG)
defines.push_back("__LITTLE_ENDIAN__");
break;
case flavourt::VISUAL_STUDIO:
defines.push_back("_M_IX86");
break;
case flavourt::CODEWARRIOR:
case flavourt::ARM:
case flavourt::ANSI:
break;
case flavourt::NONE:
UNREACHABLE;
}
}
void configt::ansi_ct::set_arch_spec_x86_64()
{
set_LP64();
endianness=endiannesst::IS_LITTLE_ENDIAN;
long_double_width=16*8;
char_is_unsigned=false;
NULL_is_zero=true;
switch(mode)
{
case flavourt::GCC:
case flavourt::CLANG:
defines.push_back("__LP64__");
defines.push_back("__x86_64");
defines.push_back("__x86_64__");
defines.push_back("_LP64");
defines.push_back("__amd64__");
defines.push_back("__amd64");
if(os == ost::OS_MACOS)
defines.push_back("__LITTLE_ENDIAN__");
break;
case flavourt::VISUAL_STUDIO:
defines.push_back("_M_X64");
defines.push_back("_M_AMD64");
break;
case flavourt::CODEWARRIOR:
case flavourt::ARM:
case flavourt::ANSI:
break;
case flavourt::NONE:
UNREACHABLE;
}
}
void configt::ansi_ct::set_arch_spec_power(const irep_idt &subarch)
{
if(subarch=="powerpc")
set_ILP32();
else // ppc64 or ppc64le
set_LP64();
if(subarch=="ppc64le")
endianness=endiannesst::IS_LITTLE_ENDIAN;
else
endianness=endiannesst::IS_BIG_ENDIAN;
long_double_width=16*8;
char_is_unsigned=true;
NULL_is_zero=true;
switch(mode)
{
case flavourt::GCC:
case flavourt::CLANG:
defines.push_back("__powerpc");
defines.push_back("__powerpc__");
defines.push_back("__POWERPC__");
defines.push_back("__ppc__");
if(os == ost::OS_MACOS)
defines.push_back("__BIG_ENDIAN__");
if(subarch!="powerpc")
{
defines.push_back("__powerpc64");
defines.push_back("__powerpc64__");
defines.push_back("__PPC64__");
defines.push_back("__ppc64__");
if(subarch=="ppc64le")
{
defines.push_back("_CALL_ELF=2");
defines.push_back("__LITTLE_ENDIAN__");
}
else
{
defines.push_back("_CALL_ELF=1");
defines.push_back("__BIG_ENDIAN__");
}
}
break;
case flavourt::VISUAL_STUDIO:
defines.push_back("_M_PPC");
break;
case flavourt::CODEWARRIOR:
case flavourt::ARM:
case flavourt::ANSI:
break;
case flavourt::NONE:
UNREACHABLE;
}
}
void configt::ansi_ct::set_arch_spec_arm(const irep_idt &subarch)
{
if(subarch=="arm64")
{
set_LP64();
long_double_width=16*8;
}
else
{
set_ILP32();
long_double_width=8*8;
}
endianness=endiannesst::IS_LITTLE_ENDIAN;
char_is_unsigned=true;
NULL_is_zero=true;
switch(mode)
{
case flavourt::GCC:
case flavourt::CLANG:
if(subarch=="arm64")
defines.push_back("__aarch64__");
else
defines.push_back("__arm__");
if(subarch=="armhf")
defines.push_back("__ARM_PCS_VFP");
break;
case flavourt::VISUAL_STUDIO:
defines.push_back("_M_ARM");
break;
case flavourt::CODEWARRIOR:
case flavourt::ARM:
case flavourt::ANSI:
break;
case flavourt::NONE:
UNREACHABLE;
}
}
void configt::ansi_ct::set_arch_spec_alpha()
{
set_LP64();
endianness=endiannesst::IS_LITTLE_ENDIAN;
long_double_width=16*8;
char_is_unsigned=false;
NULL_is_zero=true;
switch(mode)
{
case flavourt::GCC:
defines.push_back("__alpha__");
break;
case flavourt::VISUAL_STUDIO:
defines.push_back("_M_ALPHA");
break;
case flavourt::CLANG:
case flavourt::CODEWARRIOR:
case flavourt::ARM:
case flavourt::ANSI:
break;
case flavourt::NONE:
UNREACHABLE;
}
}
void configt::ansi_ct::set_arch_spec_mips(const irep_idt &subarch)
{
if(subarch=="mipsel" ||
subarch=="mips" ||
subarch=="mipsn32el" ||
subarch=="mipsn32")
{
set_ILP32();
long_double_width=8*8;
}
else
{
set_LP64();
long_double_width=16*8;
}
if(subarch=="mipsel" ||
subarch=="mipsn32el" ||
subarch=="mips64el")
endianness=endiannesst::IS_LITTLE_ENDIAN;
else
endianness=endiannesst::IS_BIG_ENDIAN;
char_is_unsigned=false;
NULL_is_zero=true;
switch(mode)
{
case flavourt::GCC:
defines.push_back("__mips__");
defines.push_back("mips");
defines.push_back(
"_MIPS_SZPTR="+std::to_string(config.ansi_c.pointer_width));
break;
case flavourt::VISUAL_STUDIO:
UNREACHABLE; // not supported by Visual Studio
break;
case flavourt::CLANG:
case flavourt::CODEWARRIOR:
case flavourt::ARM:
case flavourt::ANSI:
break;
case flavourt::NONE:
UNREACHABLE;
}
}
void configt::ansi_ct::set_arch_spec_riscv64()
{
set_LP64();
endianness = endiannesst::IS_LITTLE_ENDIAN;
long_double_width = 16 * 8;
char_is_unsigned = true;
NULL_is_zero = true;
switch(mode)
{
case flavourt::GCC:
defines.push_back("__riscv");
break;
case flavourt::VISUAL_STUDIO:
case flavourt::CLANG:
case flavourt::CODEWARRIOR:
case flavourt::ARM:
case flavourt::ANSI:
break;
case flavourt::NONE:
UNREACHABLE;
}
}
void configt::ansi_ct::set_arch_spec_s390()
{
set_ILP32();
endianness=endiannesst::IS_BIG_ENDIAN;
long_double_width=16*8;
char_is_unsigned=true;
NULL_is_zero=true;
switch(mode)
{
case flavourt::GCC:
defines.push_back("__s390__");
break;
case flavourt::VISUAL_STUDIO:
UNREACHABLE; // not supported by Visual Studio
break;
case flavourt::CLANG:
case flavourt::CODEWARRIOR:
case flavourt::ARM:
case flavourt::ANSI:
break;
case flavourt::NONE:
UNREACHABLE;
}
}
void configt::ansi_ct::set_arch_spec_s390x()
{
set_LP64();
endianness=endiannesst::IS_BIG_ENDIAN;
char_is_unsigned=true;
NULL_is_zero=true;
switch(mode)
{
case flavourt::GCC:
defines.push_back("__s390x__");
break;
case flavourt::VISUAL_STUDIO:
UNREACHABLE; // not supported by Visual Studio
break;
case flavourt::CLANG:
case flavourt::CODEWARRIOR:
case flavourt::ARM:
case flavourt::ANSI:
break;
case flavourt::NONE:
UNREACHABLE;
}
}
void configt::ansi_ct::set_arch_spec_sparc(const irep_idt &subarch)
{
if(subarch=="sparc64")
{
set_LP64();
long_double_width=16*8;
}
else
{
set_ILP32();
long_double_width=16*8;
}
endianness=endiannesst::IS_BIG_ENDIAN;
char_is_unsigned=false;
NULL_is_zero=true;
switch(mode)
{
case flavourt::GCC:
defines.push_back("__sparc__");
if(subarch=="sparc64")
defines.push_back("__arch64__");
break;
case flavourt::VISUAL_STUDIO:
UNREACHABLE; // not supported by Visual Studio
break;
case flavourt::CLANG:
case flavourt::CODEWARRIOR:
case flavourt::ARM:
case flavourt::ANSI:
break;
case flavourt::NONE:
UNREACHABLE;
}
}
void configt::ansi_ct::set_arch_spec_ia64()
{
set_LP64();
long_double_width=16*8;
endianness=endiannesst::IS_LITTLE_ENDIAN;
char_is_unsigned=false;
NULL_is_zero=true;
switch(mode)
{
case flavourt::GCC:
defines.push_back("__ia64__");
defines.push_back("_IA64");
defines.push_back("__IA64__");
break;
case flavourt::VISUAL_STUDIO:
defines.push_back("_M_IA64");
break;
case flavourt::CLANG:
case flavourt::CODEWARRIOR:
case flavourt::ARM:
case flavourt::ANSI:
break;
case flavourt::NONE:
UNREACHABLE;
}
}
void configt::ansi_ct::set_arch_spec_x32()
{
// This is a variant of x86_64 that has
// 32-bit long int and 32-bit pointers.
set_ILP32();
long_double_width=16*8; // different from i386
endianness=endiannesst::IS_LITTLE_ENDIAN;
char_is_unsigned=false;
NULL_is_zero=true;
switch(mode)
{
case flavourt::GCC:
defines.push_back("__ILP32__");
defines.push_back("__x86_64");
defines.push_back("__x86_64__");
defines.push_back("__amd64__");
defines.push_back("__amd64");
break;
case flavourt::VISUAL_STUDIO:
UNREACHABLE; // not supported by Visual Studio
break;
case flavourt::CLANG:
case flavourt::CODEWARRIOR:
case flavourt::ARM:
case flavourt::ANSI:
break;
case flavourt::NONE:
UNREACHABLE;
}
}
/// Sets up the widths of variables for the Renesas V850
void configt::ansi_ct::set_arch_spec_v850()
{
// The Renesas V850 is a 32-bit microprocessor used in
// many automotive applications. This spec is written from the
// architecture manual rather than having access to a running
// system. Thus some assumptions have been made.
set_ILP32();
// Technically, the V850's don't have floating-point at all.
// However, the RH850, aimed at automotive has both 32-bit and
// 64-bit IEEE-754 float.
double_width=8*8;
long_double_width=8*8;
endianness=endiannesst::IS_LITTLE_ENDIAN;
// Without information about the compiler and RTOS, these are guesses
char_is_unsigned=false;
NULL_is_zero=true;
// No preprocessor definitions due to lack of information
}
void configt::ansi_ct::set_arch_spec_hppa()
{
set_ILP32();
long_double_width=8*8; // different from i386
endianness=endiannesst::IS_BIG_ENDIAN;
char_is_unsigned=false;
NULL_is_zero=true;
switch(mode)
{
case flavourt::GCC:
defines.push_back("__hppa__");
break;
case flavourt::VISUAL_STUDIO:
UNREACHABLE; // not supported by Visual Studio
break;
case flavourt::CLANG:
case flavourt::CODEWARRIOR:
case flavourt::ARM:
case flavourt::ANSI:
break;
case flavourt::NONE:
UNREACHABLE;
}
}
void configt::ansi_ct::set_arch_spec_sh4()
{
set_ILP32();
long_double_width=8*8; // different from i386
endianness=endiannesst::IS_LITTLE_ENDIAN;
char_is_unsigned=false;
NULL_is_zero=true;
switch(mode)
{
case flavourt::GCC:
defines.push_back("__sh__");
defines.push_back("__SH4__");
break;
case flavourt::VISUAL_STUDIO:
UNREACHABLE; // not supported by Visual Studio
break;
case flavourt::CLANG:
case flavourt::CODEWARRIOR:
case flavourt::ARM:
case flavourt::ANSI:
break;
case flavourt::NONE:
UNREACHABLE;
}
}
configt::ansi_ct::c_standardt configt::ansi_ct::default_c_standard()
{
#if defined(__APPLE__)
// By default, clang on the Mac builds C code in GNU C11
return c_standardt::C11;
#elif defined(__FreeBSD__) || defined(__OpenBSD__)
// By default, clang on FreeBSD builds C code in GNU C99
// By default, clang on OpenBSD builds C code in C99
return c_standardt::C99;
#else
// By default, gcc 5.4 or higher use gnu11; older versions use gnu89
return c_standardt::C11;
#endif
}
configt::cppt::cpp_standardt configt::cppt::default_cpp_standard()
{
// g++ 6.3 uses gnu++14
// g++ 5.4 uses gnu++98
// clang 6.0 uses c++14
#if defined _WIN32
return cpp_standardt::CPP14;
#else
return cpp_standardt::CPP98;
#endif
}
void configt::set_arch(const irep_idt &arch)
{
ansi_c.arch=arch;
if(arch=="none")
{
// the architecture for people who can't commit
ansi_c.endianness=configt::ansi_ct::endiannesst::NO_ENDIANNESS;
ansi_c.lib=configt::ansi_ct::libt::LIB_NONE;
ansi_c.NULL_is_zero=false;
if(sizeof(long int)==8)
ansi_c.set_64();
else
ansi_c.set_32();
}
else if(arch=="alpha")
ansi_c.set_arch_spec_alpha();
else if(arch=="arm64" ||
arch=="armel" ||
arch=="armhf" ||
arch=="arm")
ansi_c.set_arch_spec_arm(arch);
else if(arch=="mips64el" ||
arch=="mipsn32el" ||
arch=="mipsel" ||
arch=="mips64" ||
arch=="mipsn32" ||
arch=="mips")
ansi_c.set_arch_spec_mips(arch);
else if(arch=="powerpc" ||
arch=="ppc64" ||
arch=="ppc64le")
ansi_c.set_arch_spec_power(arch);
else if(arch == "riscv64")
ansi_c.set_arch_spec_riscv64();
else if(arch=="sparc" ||
arch=="sparc64")
ansi_c.set_arch_spec_sparc(arch);
else if(arch=="ia64")
ansi_c.set_arch_spec_ia64();
else if(arch=="s390x")
ansi_c.set_arch_spec_s390x();
else if(arch=="s390")
ansi_c.set_arch_spec_s390();
else if(arch=="x32")
ansi_c.set_arch_spec_x32();
else if(arch=="v850")
ansi_c.set_arch_spec_v850();
else if(arch=="hppa")
ansi_c.set_arch_spec_hppa();
else if(arch=="sh4")
ansi_c.set_arch_spec_sh4();
else if(arch=="x86_64")
ansi_c.set_arch_spec_x86_64();
else if(arch=="i386")
ansi_c.set_arch_spec_i386();
else
{
// We run on something new and unknown.
// We verify for i386 instead.
ansi_c.set_arch_spec_i386();
ansi_c.arch="i386";
}
}
/// \brief Parses the `object_bits` argument from the command line arguments.
/// \param argument The command line argument to parse the `object_bits` from.
/// \param pointer_width The width of a pointer in bits. This is used to check
/// the value of object_bits is within the valid range.
/// \return A `bv_encodingt` on successful parsing. In the case where an invalid
/// argument is specified, an `invalid_command_line_argument_exceptiont` will
/// be thrown.
configt::bv_encodingt parse_object_bits_encoding(
const std::string &argument,
const std::size_t pointer_width)
{
const auto throw_for_reason = [&](const std::string &reason) {
throw invalid_command_line_argument_exceptiont(
"Value of \"" + argument + "\" given for object-bits is " + reason +
". object-bits must be positive and less than the pointer width (" +
std::to_string(pointer_width) + ") ",
"--object_bits");
};
const auto object_bits = string2optional<unsigned int>(argument);
if(!object_bits)
throw_for_reason("not a valid unsigned integer");
if(*object_bits == 0 || *object_bits >= pointer_width)
throw_for_reason("out of range");
configt::bv_encodingt bv_encoding;
bv_encoding.object_bits = *object_bits;
bv_encoding.is_object_bits_default = false;
return bv_encoding;
}
bool configt::set(const cmdlinet &cmdline)
{
// defaults -- we match the architecture we have ourselves
cpp.cpp_standard=cppt::default_cpp_standard();
ansi_c.single_precision_constant=false;
ansi_c.for_has_scope=true; // C99 or later
ansi_c.ts_18661_3_Floatn_types=false;
ansi_c.c_standard=ansi_ct::default_c_standard();
ansi_c.endianness=ansi_ct::endiannesst::NO_ENDIANNESS;
ansi_c.os=ansi_ct::ost::NO_OS;
ansi_c.arch="none";
ansi_c.lib=configt::ansi_ct::libt::LIB_NONE;
// NOLINTNEXTLINE(readability/casting)
ansi_c.NULL_is_zero=reinterpret_cast<size_t>(nullptr)==0;
// Default is ROUND_TO_EVEN, justified by C99:
// 1 At program startup the floating-point environment is initialized as
// prescribed by IEC 60559:
// - All floating-point exception status flags are cleared.
// - The rounding direction mode is rounding to nearest.
ansi_c.rounding_mode=ieee_floatt::ROUND_TO_EVEN;
if(cmdline.isset("function"))
main=cmdline.get_value("function");
if(cmdline.isset('D'))
ansi_c.defines=cmdline.get_values('D');
if(cmdline.isset('I'))
ansi_c.include_paths=cmdline.get_values('I');
if(cmdline.isset("classpath"))
{
// Specifying -classpath or -cp overrides any setting of the
// CLASSPATH environment variable.
set_classpath(cmdline.get_value("classpath"));
}
else if(cmdline.isset("cp"))
{
// Specifying -classpath or -cp overrides any setting of the
// CLASSPATH environment variable.
set_classpath(cmdline.get_value("cp"));
}
else
{
// environment variable set?
const char *CLASSPATH=getenv("CLASSPATH");
if(CLASSPATH!=nullptr)
set_classpath(CLASSPATH);
else
set_classpath("."); // default
}
if(cmdline.isset("main-class"))
java.main_class=cmdline.get_value("main-class");
if(cmdline.isset("include"))
ansi_c.include_files=cmdline.get_values("include");
// the default architecture is the one we run on
irep_idt this_arch=this_architecture();
irep_idt arch=this_arch;
// let's pick an OS now
// the default is the one we run on
irep_idt this_os=this_operating_system();
irep_idt os=this_os;
if(cmdline.isset("i386-linux"))
{
os="linux";
arch="i386";
}
else if(cmdline.isset("i386-win32") ||
cmdline.isset("win32"))
{
os="windows";
arch="i386";
}
else if(cmdline.isset("winx64"))
{
os="windows";
arch="x86_64";
}
else if(cmdline.isset("i386-macos"))
{
os="macos";
arch="i386";
}
else if(cmdline.isset("ppc-macos"))
{
arch="powerpc";
os="macos";
}
if(cmdline.isset("arch"))
{
arch=cmdline.get_value("arch");
}
if(cmdline.isset("os"))
{
os=cmdline.get_value("os");
}
if(os=="windows")
{
// Cygwin uses GCC throughout, use i386-linux
// MinGW needs --win32 --gcc
ansi_c.lib=configt::ansi_ct::libt::LIB_FULL;
ansi_c.os=configt::ansi_ct::ost::OS_WIN;
if(cmdline.isset("gcc"))
{
// There are gcc versions that target Windows (MinGW for example),
// and we support that.
ansi_c.preprocessor=ansi_ct::preprocessort::GCC;
ansi_c.mode=ansi_ct::flavourt::GCC;
// enable Cygwin
#ifdef _WIN32
ansi_c.defines.push_back("__CYGWIN__");
#endif
// MinGW has extra defines
ansi_c.defines.push_back("__int64=long long");
}
else
{
// On Windows, our default is Visual Studio.
// On FreeBSD, it's clang.
// On anything else, it's GCC as the preprocessor,
// but we recognize the Visual Studio language,
// which is somewhat inconsistent.
#ifdef _WIN32
ansi_c.preprocessor=ansi_ct::preprocessort::VISUAL_STUDIO;
ansi_c.mode=ansi_ct::flavourt::VISUAL_STUDIO;
#elif __FreeBSD__
ansi_c.preprocessor=ansi_ct::preprocessort::CLANG;
ansi_c.mode=ansi_ct::flavourt::VISUAL_STUDIO;
#else
ansi_c.preprocessor=ansi_ct::preprocessort::GCC;
ansi_c.mode=ansi_ct::flavourt::VISUAL_STUDIO;
#endif
cpp.cpp_standard = cppt::cpp_standardt::CPP14;
}
}
else if(os=="macos")
{
ansi_c.lib=configt::ansi_ct::libt::LIB_FULL;
ansi_c.os=configt::ansi_ct::ost::OS_MACOS;
ansi_c.mode = ansi_ct::flavourt::CLANG;
ansi_c.preprocessor=ansi_ct::preprocessort::CLANG;
}
else if(os=="linux" || os=="solaris")
{
ansi_c.lib=configt::ansi_ct::libt::LIB_FULL;
ansi_c.os=configt::ansi_ct::ost::OS_LINUX;
ansi_c.mode=ansi_ct::flavourt::GCC;
ansi_c.preprocessor=ansi_ct::preprocessort::GCC;
}
else if(os=="freebsd")
{
ansi_c.lib=configt::ansi_ct::libt::LIB_FULL;
ansi_c.os=configt::ansi_ct::ost::OS_LINUX;
ansi_c.mode=ansi_ct::flavourt::CLANG;
ansi_c.preprocessor=ansi_ct::preprocessort::CLANG;
}
else
{
// give up, but use reasonable defaults
ansi_c.lib=configt::ansi_ct::libt::LIB_FULL;
ansi_c.os=configt::ansi_ct::ost::OS_LINUX;
ansi_c.mode=ansi_ct::flavourt::GCC;
ansi_c.preprocessor=ansi_ct::preprocessort::GCC;
}
if(ansi_c.preprocessor == ansi_ct::preprocessort::GCC)
ansi_c.gcc__float128_type = true;
set_arch(arch);
if(os=="windows")
{
// note that sizeof(void *)==8, but sizeof(long)==4!
if(arch=="x86_64")
ansi_c.set_LLP64();
// On Windows, wchar_t is unsigned 16 bit, regardless
// of the compiler used.
ansi_c.wchar_t_width=2*8;
ansi_c.wchar_t_is_unsigned=true;
// long double is the same as double in Visual Studio,
// but it's 16 bytes with GCC with the 64-bit target.
if(arch == "x86_64" && cmdline.isset("gcc"))
ansi_c.long_double_width=16*8;
else
ansi_c.long_double_width=8*8;
}