[gmx-users] make gives error in futil.c with mpi and ccc-6.5.6.002-1

[Yang Ye]

Find out the c preprocessor of the Compaq C compiler and try to obtain 
its output of parsed C source file.

On 11/15/2007 10:12 AM, chris.neale at utoronto.ca wrote:
> I have had some success reproducing the event with a simple c program 
> and the issue appears to be with the in-house mpicc wrapper script. 
> The difference between gcc and mpicc appears limited to strings 
> (-D=\"string\") and does not show up in numerical form (e.g. -D=4)
>
> I'll post another update when the issue is resolved.
>
> Chris.
>
> In the following examples cc is the same as mpicc (they both point to 
> a script called 'compile') but mpicc invokes slightly different 
> linking options than cc
>
> $ cat prog.c
> #include <stdlib.h>
> #include <stdio.h>
>
> int main(int argn,char *args[]){
> printf("The value of MYDEF is %s\n",MYDEF);
> }
>
> $ gcc prog.c -DMYDEF=\"aaa\" -o prog
> $ prog
> The value of MYDEF is aaa
> $ cc prog.c -DMYDEF=\"aaa\" -o prog
> cc: Error: prog.c, line 5: In this statement, "aaa" is not declared. 
> (undeclared)
> printf("The value of MYDEF is %s\n",MYDEF);
> --------------------------------------^
>
> ###
> However, when the defined value is a number, the problem dissapears:
>
> $ cat prog_num.c
> #include <stdlib.h>
> #include <stdio.h>
>
> int main(int argn,char *args[]){
> printf("The value of MYDEF is %d\n",MYDEF);
> }
>
> $ gcc prog_num.c -DMYDEF=4 -o prog_num
> $ prog_num
> The value of MYDEF is 4
> $ cc prog_num.c -DMYDEF=4 -o prog_num
> $ prog_num
> The value of MYDEF is 4
>
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