Which compiler is used to compile DMD on OS X, is it Clang or GCC? I was under the impression that it's GCC that is supposed to be used. But looks like it's Clang, because I found a test case (see below) that passes if DMD is compiled with Clang but fails when it's compiled with GCC.

The reason why I'm asking is that the make file explicitly says "g++", yes I know that g++ points to Clang. I have also created a pull request that switch from g++ to clang++, but that was reverted because of some failing tests. Because of that, I've made sure that my g++ actually points to GCC and not Clang.

Here is the test case, it's a test extracted from "test/runnable/interpret.d" in the DMD test suite:

import std.stdio;

void test113()
{
    import core.math;

    static void compare(real a, real b)
    {
        writefln("compare(%30.30f, %30.30f);", a, b);
        assert(fabs(a - b) < 128*real.epsilon);
    }

    static if(__traits(compiles, (){enum real ctval4 = yl2xp1(3.14, 1);}))
    {
        enum real ctval4 = yl2xp1(3.14, 1);
        real rtval4 = yl2xp1(3.14, 1);
        compare(ctval4, rtval4);
    }
}

void main ()
{
    test113();
}

-- 
/Jacob Carlborg


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It's compiled with clang.

On 11/1/2014 4:56 AM, Jacob Carlborg via dmd-internals wrote:
> Which compiler is used to compile DMD on OS X, is it Clang or GCC? I was under the impression that it's GCC that is supposed to be used. But looks like it's Clang, because I found a test case (see below) that passes if DMD is compiled with Clang but fails when it's compiled with GCC.
>
> The reason why I'm asking is that the make file explicitly says "g++", yes I know that g++ points to Clang. I have also created a pull request that switch from g++ to clang++, but that was reverted because of some failing tests. Because of that, I've made sure that my g++ actually points to GCC and not Clang.
>
> Here is the test case, it's a test extracted from "test/runnable/interpret.d" in the DMD test suite:
>
> import std.stdio;
>
> void test113()
> {
>      import core.math;
>
>      static void compare(real a, real b)
>      {
>          writefln("compare(%30.30f, %30.30f);", a, b);
>          assert(fabs(a - b) < 128*real.epsilon);
>      }
>
>      static if(__traits(compiles, (){enum real ctval4 = yl2xp1(3.14, 1);}))
>      {
>          enum real ctval4 = yl2xp1(3.14, 1);
>          real rtval4 = yl2xp1(3.14, 1);
>          compare(ctval4, rtval4);
>      }
> }
>
> void main ()
> {
>      test113();
> }
>

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The auto testers use gcc (4.2.1, I just checked all 3 machines).  I've never seen the entire test suite pass with clang, though it's been quite a while since I tried clang, maybe it's gotten better.

On 11/1/2014 4:56 AM, Jacob Carlborg via dmd-internals wrote:
> Which compiler is used to compile DMD on OS X, is it Clang or GCC? I was under the impression that it's GCC that is supposed to be used. But looks like it's Clang, because I found a test case (see below) that passes if DMD is compiled with Clang but fails when it's compiled with GCC.
>
> The reason why I'm asking is that the make file explicitly says "g++", yes I know that g++ points to Clang. I have also created a pull request that switch from g++ to clang++, but that was reverted because of some failing tests. Because of that, I've made sure that my g++ actually points to GCC and not Clang.
>
> Here is the test case, it's a test extracted from "test/runnable/interpret.d" in the DMD test suite:
>
> import std.stdio;
>
> void test113()
> {
>      import core.math;
>
>      static void compare(real a, real b)
>      {
>          writefln("compare(%30.30f, %30.30f);", a, b);
>          assert(fabs(a - b) < 128*real.epsilon);
>      }
>
>      static if(__traits(compiles, (){enum real ctval4 = yl2xp1(3.14, 1);}))
>      {
>          enum real ctval4 = yl2xp1(3.14, 1);
>          real rtval4 = yl2xp1(3.14, 1);
>          compare(ctval4, rtval4);
>      }
> }
>
> void main ()
> {
>      test113();
> }
>
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Hmm, that's really odd. Because the I can't get the whole test suite to pass with GCC, only with Clang.

I'm having:

GCC: 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00)
Clang: Apple LLVM version 6.0 (clang-600.0.54) (based on LLVM 3.5svn)

On 1 nov 2014, at 20:29, Brad Roberts via dmd-internals <dmd-internals@puremagic.com> wrote:

> The auto testers use gcc (4.2.1, I just checked all 3 machines).  I've never seen the entire test suite pass with clang, though it's been quite a while since I tried clang, maybe it's gotten better.
> 
> On 11/1/2014 4:56 AM, Jacob Carlborg via dmd-internals wrote:
>> Which compiler is used to compile DMD on OS X, is it Clang or GCC? I was under the impression that it's GCC that is supposed to be used. But looks like it's Clang, because I found a test case (see below) that passes if DMD is compiled with Clang but fails when it's compiled with GCC.
>> 
>> The reason why I'm asking is that the make file explicitly says "g++", yes I know that g++ points to Clang. I have also created a pull request that switch from g++ to clang++, but that was reverted because of some failing tests. Because of that, I've made sure that my g++ actually points to GCC and not Clang.
>> 
>> Here is the test case, it's a test extracted from "test/runnable/interpret.d" in the DMD test suite:
>> 
>> import std.stdio;
>> 
>> void test113()
>> {
>>     import core.math;
>> 
>>     static void compare(real a, real b)
>>     {
>>         writefln("compare(%30.30f, %30.30f);", a, b);
>>         assert(fabs(a - b) < 128*real.epsilon);
>>     }
>> 
>>     static if(__traits(compiles, (){enum real ctval4 = yl2xp1(3.14, 1);}))
>>     {
>>         enum real ctval4 = yl2xp1(3.14, 1);
>>         real rtval4 = yl2xp1(3.14, 1);
>>         compare(ctval4, rtval4);
>>     }
>> }
>> 
>> void main ()
>> {
>>     test113();
>> }
>> 
> _______________________________________________
> dmd-internals mailing list
> dmd-internals@puremagic.com
> http://lists.puremagic.com/mailman/listinfo/dmd-internals

-- 
/Jacob Carlborg


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