This is the mail archive of the gcc-help@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: gcc -m32 -dumpmachine


On 9 May 2018 at 10:08, Jonathan Wakely wrote:
> On 9 May 2018 at 10:01, Warlich, Christof wrote:
>> Hi,
>>
>> I'm surprised: On an x86_64 machine, "gcc -dumpmachine" prints  "x86_64-linux-gnu" as expected. But "gcc -m32 -dumpmachine" prints the same, whereas I'd expected it to print something like "i686-linux-gnu" instead, as indicated by gcc's usage:
>>
>> $ gcc -help
>> ...
>>   -dumpmachine             Display the compiler's target processor
>>
>> After all, I've explicitly told it to build for 32-bit targets.

And for this part: I assume the reason is that -dumpmachine doesn't
actually build anything. Adding -m32 doesn't tell the compiler to
build for 32-bit targets, since it's not building, it's just dumping
part of its configuration settings.


>> But anyhow, is there any other way to obtain the target triplet (or at least the target processor that gcc would actually build for, depending on the switches being passed?
>
> gcc -m32 -Q --help=target | fgrep -- -march


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]