The current workaround for encoding __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ in gcc-apple for OS X 10.10 lets everyone think, they're on 10.9. There's a proper fix in FSF GCC trunk that handles 10.10 but does not encode the patch level. (https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=218873, https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61407). A much more sophisticated patch that also handles the patch level is in FSF GCC bugzilla (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63810) but not yet on trunk because of pending legal paperwork. I have backported the first patch to gcc-apple-4.2.1_p5666-r2 and extended to also include the patch level. Example: michael@osx1010:~ # /usr/bin/clang -E -mmacosx-version-min=10.10.10 -dM -c t.c | grep OS_X #define __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ 101010 michael@osx1010:~ # ~/nobak/gentoo/usr/bin/gcc -E -mmacosx-version-min=10.10.10 -dM -c t.c | grep OS_X #define __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ 101010 Unpatched gcc-apple would have croaked: michael@osx1010:~ # gcc -E -mmacosx-version-min=10.10.10 -dM -c t.c | grep OS_X <built-in>:0: error: Unknown value '10.10.10' of -mmacosx-version-min #define __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ 1000 Also, unpatched gcc-apple draws a line at patch level 9: michael@osx1010 ~ $ gcc -E -mmacosx-version-min=10.4.10 -dM -c t.c | grep OS_X <built-in>:0: error: Unknown value '10.4.10' of -mmacosx-version-min #define __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ 1000 I have opted for the clang way to cap at level 9: michael@osx1010~ # ~/nobak/gentoo/usr/bin/gcc -E -mmacosx-version-min=10.4.10 -dM -c t.c | grep OS_X #define __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ 1049 michael@osx1010~ # /usr/bin/clang -E -mmacosx-version-min=10.4.10 -dM -c t.c | grep OS_X #define __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ 1049 Reproducible: Always
Created attachment 394896 [details, diff] extend encoding of __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ for 10.10
applied to gcc-apple-4.2.1_p5666-r2, I don't think we need a revbump, since bootstrapping should be broken anyway.
