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include(CheckLibraryExists)
include(CheckTypeSize)
include(CheckCXXSourceCompiles)
# Check if the size of numeric types are suitable.
check_type_size("short" SIZEOF_SHORT)
if(NOT ${SIZEOF_SHORT} EQUAL 2)
message(FATAL_ERROR "TagLib requires that short is 16-bit wide.")
endif()
check_type_size("int" SIZEOF_INT)
if(NOT ${SIZEOF_INT} EQUAL 4)
message(FATAL_ERROR "TagLib requires that int is 32-bit wide.")
endif()
check_type_size("long long" SIZEOF_LONGLONG)
if(NOT ${SIZEOF_LONGLONG} EQUAL 8)
message(FATAL_ERROR "TagLib requires that long long is 64-bit wide.")
endif()
check_type_size("wchar_t" SIZEOF_WCHAR_T)
if(${SIZEOF_WCHAR_T} LESS 2)
message(FATAL_ERROR "TagLib requires that wchar_t is sufficient to store a UTF-16 char.")
endif()
check_type_size("float" SIZEOF_FLOAT)
if(NOT ${SIZEOF_FLOAT} EQUAL 4)
message(FATAL_ERROR "TagLib requires that float is 32-bit wide.")
endif()
check_type_size("double" SIZEOF_DOUBLE)
if(NOT ${SIZEOF_DOUBLE} EQUAL 8)
message(FATAL_ERROR "TagLib requires that double is 64-bit wide.")
endif()
# Determine which kind of atomic operations your compiler supports.
check_cxx_source_compiles("
#include <atomic>
int main() {
std::atomic_int x(1);
++x;
--x;
return 0;
}
" HAVE_STD_ATOMIC)
if(NOT HAVE_STD_ATOMIC)
check_cxx_source_compiles("
int main() {
volatile int x;
__sync_add_and_fetch(&x, 1);
int y = __sync_sub_and_fetch(&x, 1);
return 0;
}
" HAVE_GCC_ATOMIC)
if(NOT HAVE_GCC_ATOMIC)
check_cxx_source_compiles("
#include <libkern/OSAtomic.h>
int main() {
volatile int32_t x;
OSAtomicIncrement32Barrier(&x);
int32_t y = OSAtomicDecrement32Barrier(&x);
return 0;
}
" HAVE_MAC_ATOMIC)
if(NOT HAVE_MAC_ATOMIC)
check_cxx_source_compiles("
#include <windows.h>
int main() {
volatile LONG x;
InterlockedIncrement(&x);
LONG y = InterlockedDecrement(&x);
return 0;
}
" HAVE_WIN_ATOMIC)
if(NOT HAVE_WIN_ATOMIC)
check_cxx_source_compiles("
#include <ia64intrin.h>
int main() {
volatile int x;
__sync_add_and_fetch(&x, 1);
int y = __sync_sub_and_fetch(&x, 1);
return 0;
}
" HAVE_IA64_ATOMIC)
endif()
endif()
endif()
endif()
# Determine which kind of byte swap functions your compiler supports.
check_cxx_source_compiles("
int main() {
__builtin_bswap16(0);
__builtin_bswap32(0);
__builtin_bswap64(0);
return 0;
}
" HAVE_GCC_BYTESWAP)
if(NOT HAVE_GCC_BYTESWAP)
check_cxx_source_compiles("
#include <byteswap.h>
int main() {
__bswap_16(0);
__bswap_32(0);
__bswap_64(0);
return 0;
}
" HAVE_GLIBC_BYTESWAP)
if(NOT HAVE_GLIBC_BYTESWAP)
check_cxx_source_compiles("
#include <stdlib.h>
int main() {
_byteswap_ushort(0);
_byteswap_ulong(0);
_byteswap_uint64(0);
return 0;
}
" HAVE_MSC_BYTESWAP)
if(NOT HAVE_MSC_BYTESWAP)
check_cxx_source_compiles("
#include <libkern/OSByteOrder.h>
int main() {
OSSwapInt16(0);
OSSwapInt32(0);
OSSwapInt64(0);
return 0;
}
" HAVE_MAC_BYTESWAP)
if(NOT HAVE_MAC_BYTESWAP)
check_cxx_source_compiles("
#include <sys/endian.h>
int main() {
swap16(0);
swap32(0);
swap64(0);
return 0;
}
" HAVE_OPENBSD_BYTESWAP)
endif()
endif()
endif()
endif()
# Determine whether your compiler supports some safer version of vsprintf.
check_cxx_source_compiles("
#include <cstdio>
#include <cstdarg>
int main() {
char buf[20];
va_list args;
vsnprintf(buf, 20, \"%d\", args);
return 0;
}
" HAVE_VSNPRINTF)
if(NOT HAVE_VSNPRINTF)
check_cxx_source_compiles("
#include <cstdio>
#include <cstdarg>
int main() {
char buf[20];
va_list args;
vsprintf_s(buf, \"%d\", args);
return 0;
}
" HAVE_VSPRINTF_S)
endif()
# Determine whether your compiler supports ISO _strdup.
check_cxx_source_compiles("
#include <cstring>
int main() {
_strdup(0);
return 0;
}
" HAVE_ISO_STRDUP)
# Determine whether zlib is installed.
if(NOT ZLIB_SOURCE)
find_package(ZLIB)
if(ZLIB_FOUND)
set(HAVE_ZLIB 1)
else()
set(HAVE_ZLIB 0)
endif()
endif()
# Determine whether CppUnit is installed.
if(BUILD_TESTS AND NOT BUILD_SHARED_LIBS)
find_package(CppUnit)
if(NOT CppUnit_FOUND)
message(STATUS "CppUnit not found, disabling tests.")
set(BUILD_TESTS OFF)
endif()
endif()
# Detect WinRT mode
if(CMAKE_SYSTEM_NAME STREQUAL "WindowsStore")
set(PLATFORM WINRT 1)
endif()
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