Mike, Thanks for the answer, but I understand very little of it.
> The above can be read as: > > If TARGET_64BIT is true, then TARGET_C99_FUNCTIONS is true, > otherwise if we're targeting 10.3 or later, then TARGET_C99_FUNCTIONS > is true, otherwise, TARGET_C99_FUNCTIONS is false. So far so good. we are targeting means that flag: > -mmacosx-version-min=version > The earliest version of MacOS X that this executable will > run on is version. > Typical values of version include 10.1, 10.2, and 10.3.9. > > The default for this option is to make choices that seem > to be most useful. Is this under the user control and how? > though, the exact default for this flag is changing (has change, is > going to change). I noticed that! > For example, if you tell it, How could I? I would be interested by 10.3.9 (possibly 10.4.9). > you are going to generate code for 10.1, then, TARGET_C99_FUNCTIONS is false. > > We used to default to 10.1, in later versions, we default it this way: > > #define DARWIN_MINVERSION_SPEC \ > "%{m64:%{fgnu-runtime:10.4; \ > ,objective-c|,objc-cpp-output:10.5; \ > ,objective-c++|,objective-c++-cpp-output:10.5; \ > :10.4}; \ > shared-libgcc:10.3; \ > :10.1}" > > for ppc, and x86 defaults it this way: > > /* Determine a minimum version based on compiler options. */ > #define DARWIN_MINVERSION_SPEC \ > "%{!m64|fgnu-runtime:10.4; \ > ,objective-c|,objc-cpp-output:10.5; \ > ,objective-c++|,objective-c++-cpp-output:10.5; \ > :10.4}" This is a part I cannot decipher. Dominique