Try adding 'L' to the end of the constant: 0xFF00000000000000L That tells the compiler that it's a long and not an integer. Cheers, Lyle -----Original Message----- From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx] On Behalf Of Nate Iverson Sent: Tuesday, March 02, 2004 4:16 PM To: gcc-help@xxxxxxxxxxx Subject: Does Cygwin's GCC support 64-bit constants? I'm getting the following warning message when I try to compile source code that contains 0xFF00000000000000 as a constant. warning: integer constant is too large for "long" type Cywin's GCC appears to have 64-bit integer support since there are no warnings/errors for uint64_t variables. Below are the gcc details: $ gcc -v Reading specs from /bin/../lib/gcc-lib/i686-pc-cygwin/3.3.1/specs Configured with: /GCC/gcc-3.3.1-3/configure --with-gcc --with-gnu-ld --with-gnu-as --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib --libexecdir=/usr/sbin --mandir=/usr/share/man --infodir=/usr/share/info --enable-languages=c,ada,c++,f77,pascal,java,objc --enable-libgcj --enable-threads=posix --with-system-zlib --enable-nls --without-included-gettext --enable-interpreter --enable-sjlj-exceptions --disable-version-specific-runtime-libs --enable-shared --disable-win32-registry --enable-java-gc=boehm --disable-hash-synchronization --verbose --target=i686-pc-cygwin --host=i686-pc-cygwin --build=i686-pc-cygwin Thread model: posix gcc version 3.3.1 (cygming special) I have also tried to cast the constant (long long)0xFF00000000000000 -- it didn't change anything. Additionally, I have compiled this on Linux and QNX with no issues. Any insight is appreciated, Nate
