Byron Servies wrote:
> On 12/19/08 11:21 AM, George Vasick wrote:
>> Byron Servies wrote:
>>> On 12/17/08 04:15 PM, Raj Prakash wrote:
>>>
>>>>
>>>> 4. Technical Description:
>>>>    4.1. Details:
>>>>     - Existing GCC 3.4.3, GNU Runtime 3.4.3, and GNU Binutils 2.15 will
>>>>       remain unchanged in /usr/sfw/.
>>>>     - The latest community versions, GCC 4.3.2, GNU Runtime 4.3.2, and
>>>>       GNU Binutils 2.19, will be ported to OpenSolaris and installed 
>>>> in /usr/compilers/gcc432.
>>>>     - Softlinks to commands in /usr/bin, e.g. /usr/bin/gcc, will be
>>>>       created point to /usr/compilers/gcc432/bin.
>>>>     - Softlinks to commands in /usr/gnu/bin, e.g. /usr/gnu/bin/cc, will
>>>>       be created pointing to /usr/compilers/gcc432/bin.
>>>>     - Libraries in /usr/compilers/gcc432/lib and 
>>>> /usr/compilers/gcc432/lib/{MACH64}
>>>>       will be linked into /usr/lib and /usr/lib/{MACH64}.
>>>
>>> So you are proposing to have the program referenced by 2 different 
>>> names in 3 different places?
>>>
>>> Could you not at least make "gcc" be "gcc" everwhere (and prefix all 
>>> the other commands with "g") to make it impossible to confuse them 
>>> with the Sun variants?  This is both common practice, and all the 
>>> packages provide for this via the "--program-prefix" option.
>>
>> We are following the convention already established in OpenSolaris 
>> with gcc 3.4.3:
>>
>>  ls -l /usr/gnu/bin/cc /usr/bin/gcc /usr/sfw/bin/gcc
>> lrwxrwxrwx 1 root root    14 2008-12-11 12:56 /usr/bin/gcc -> 
>> ../sfw/bin/gcc*
>> lrwxrwxrwx 1 root root    17 2008-12-11 12:56 /usr/gnu/bin/cc -> 
>> ../../sfw/bin/gcc*
>> -r-xr-xr-x 3 root bin  88320 2008-12-11 12:56 /usr/sfw/bin/gcc*
>>
> 
> Just because it has been done doesn't make it a good idea.  Having all 
> the different names and links makes upgrades hard and consistency moot.
> 
> Pick a location.  Pick a name.

Pick and name and pick a location seems to limit the user to having only 
one version of gcc installed at a time.  We'd like to let users try out 
new versions while they are actively developing with their current versions.

> 
>> I also see a similar pattern on Ubuntu Linux where both cc and gcc are 
>> links to a gcc command with a suffix, e.g. gcc-4.3.
> 
> On Ubuntu, gcc is the only possible compiler.  Having conflicting 
> options, etc., is not a possibility.  On Solaris, the Sun compiler will 
> be the 'cc' command (and the make command), and it is not compatible 
> with gcc.

I see both both cc and gcc links on my Ubuntu system.  They were 
installed by default when I installed the operating system.

On OpenSolaris with both Studio and GCC installed, gcc would always get 
me the gnu compiler.  The cc command would get me either gnu cc or 
studio cc depending on whether /usr/bin or /usr/gnu/bin is first in my PATH.


Thanks,
George

> 
> Byron

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