Package: libc6-dev Version: 2.13-35 Severity: wishlist File: /usr/include/x86_64-linux-gnu/sys/types.h
sys/types.h defines the sized int types, such as int64_t, differently for GCC than other compilers. For non-GCC compilers, sys/types.h does this: typedef char int8_t; typedef short int int16_t; typedef int int32_t; typedef long int int64_t; However, for compilers that identify themselves as GCC (which includes many non-GCC compilers), sys/types.h does this instead: # define __intN_t(N, MODE) \ typedef int int##N##_t __attribute__ ((__mode__ (MODE))) sys/types.h defines the sized int types, such as int64_t, differently for GCC than other compilers. For non-GCC compilers, sys/types.h does this: typedef char int8_t; typedef short int int16_t; typedef int int32_t; typedef long int int64_t; However, for compilers that identify themselves as GCC (which includes many non-GCC compilers), sys/types.h does this instead: # define __intN_t(N, MODE) \ typedef int int##N##_t __attribute__ ((__mode__ (MODE))) __intN_t (8, __QI__); __intN_t (16, __HI__); __intN_t (32, __SI__); __intN_t (64, __DI__); These __mode__ attributes change the sizes of these types for GCC. However, many non-GCC compilers identify themselves as GCC because they support some (but not all) extensions; such compilers will consider these types all "int" if they don't recognize the __mode__ extension. Do these GCC-specific declarations have some advantage over the portable declarations? If not, why not always use the portable declarations? - Josh Triplett -- System Information: Debian Release: wheezy/sid APT prefers unstable APT policy: (500, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 3.2.0-3-amd64 (SMP w/4 CPU cores) Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages libc6-dev:amd64 depends on: ii libc-dev-bin 2.13-35 ii libc6 2.13-35 ii linux-libc-dev 3.2.30-1 Versions of packages libc6-dev:amd64 recommends: ii gcc [c-compiler] 4:4.7.2-1 ii gcc-4.6 [c-compiler] 4.6.3-11 ii gcc-4.7 [c-compiler] 4.7.2-3 Versions of packages libc6-dev:amd64 suggests: ii glibc-doc 2.13-35 ii manpages-dev 3.42-1 -- no debconf information -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/20121007232923.5177.70906.reportbug@leaf
