On Fri, Feb 6, 2015 at 4:35 AM, Kyle J. McKay <mackyle@xxxxxxxxx> wrote:
> MAC_OS_X_VERSION_MIN_REQUIRED may be defined by the builder to a
> specific version in order to produce compatible binaries for a
> particular system. Blindly defining it to MAC_OS_X_VERSION_10_6
> is bad.
>
> Additionally MAC_OS_X_VERSION_10_6 will not be defined on older
> systems and should AvailabilityMacros.h be included on such as
> system an error will result. However, using the explicit value
> of 1060 (which is what MAC_OS_X_VERSION_10_6 is defined to) does
> not solve the problem.
>
> The changes that introduced stepping on MAC_OS_X_VERSION_MIN were
> made in b195aa00 (git-compat-util: suppress unavoidable
> Apple-specific deprecation warnings) to avoid deprecation
> warnings.
>
> Instead of blindly setting MAC_OS_X_VERSION_MIN to 1060 change
> the definition of DEPRECATED_ATTRIBUTE to empty to avoid the
> warnings. This preserves any MAC_OS_X_VERSION_MIN_REQUIRED
> setting while avoiding the warnings as intended by b195aa00.
>
> Signed-off-by: Kyle J. McKay <mackyle@xxxxxxxxx>
Tested on 10.10.2 (Yosemite) and 10.5.8 (Snow Leopard).
Reviewed-by: Eric Sunshine <sunshine@xxxxxxxxxxxxxx>
More below...
> ---
> git-compat-util.h | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/git-compat-util.h b/git-compat-util.h
> index eb9b0ff3..0efd32c4 100644
> --- a/git-compat-util.h
> +++ b/git-compat-util.h
> @@ -212,12 +212,15 @@ extern char *gitbasename(char *);
> #endif
>
> #ifndef NO_OPENSSL
> +#ifdef __APPLE__
> #define __AVAILABILITY_MACROS_USES_AVAILABILITY 0
> -#define MAC_OS_X_VERSION_MIN_REQUIRED MAC_OS_X_VERSION_10_6
> +#include <AvailabilityMacros.h>
> +#undef DEPRECATED_ATTRIBUTE
> +#define DEPRECATED_ATTRIBUTE
> +#undef __AVAILABILITY_MACROS_USES_AVAILABILITY
> +#endif
> #include <openssl/ssl.h>
> #include <openssl/err.h>
> -#undef MAC_OS_X_VERSION_MIN_REQUIRED
> -#undef __AVAILABILITY_MACROS_USES_AVAILABILITY
DEPRECATED_ATTRIBUTE is a fairly generic name. Do we want to be extra
careful and #undef it here to avoid potential unintended interactions
with other #includes (Apple or not)?
#ifdef __APPLE__
#undef DEPRECATED_ATTRIBUTE
#endif
On the other hand, we've already mucked with it, so #undef may be superfluous.
> #ifdef NO_HMAC_CTX_CLEANUP
> #define HMAC_CTX_cleanup HMAC_cleanup
> #endif
> --
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