Enquire within for LP64

The program enquire.c will tell you a lot about your machine.
Here is how to compile it on HP/UX

> cc +DA2.0W +w1 +M2 enquire.c     



Use the flags +w1 for warnings, +M2 for 64bits

These are the kind of problems you should look out for:



/714: Function "malloc" called with no prototype or definition inscope

/724: Initialization converts default int return type to pointer

/722:.*cast converts 32 bit constant to pointer

/725:.*cast converts 32 bit integer to pointer

/727:.*cast truncates pointer into 32 bit integer

/729:.*converts int* to long*

/732:.*different types treated as unsigned

/740:.*casting to a smaller size may truncate

/530:.*casting from loose to strict alignment

/720:.*Assignment may overflow

A simple example that has many of the problems

> pr -n x.c

1 void main(){

2     int *x, *q, i;

3     long l=-1;

4     x = malloc(sizeof(int)*10);

5     (int*)i;

6     (int)  &i;

7     (long*)&i;

8     i = l;

9 }



hp64> cc  +DA2.0W +M2 +w1 -Aa x.c



line 4: warning 714: Function "malloc" called with no prototype or definition in scope.

line 4: warning 724: LP64 migration: Assignment converts default int return type to pointer "x".

line 5: warning 725: LP64 migration: Cast converts 32 bit integer to pointer.

line 6: warning 727: LP64 migration: Cast truncates pointer into 32 bit integer.

line 7: warning 530: LP64 migration: Casting from loose to strict alignment: Resulting pointer may be misaligned.

line 7: warning 729: LP64 migration: Cast converts int* to long*.

line 8: warning 720: LP64 migration: Assignment may overflow integer "i".





Sorting LP64 warnings by problem types for ease in fixing



  > make 2>&1 | grep LP64 | xsort 'warning:\s+\S+:' | align warn > lp64.log

  > vim -q lp64.log   

  > emacs lp64.log

  > M-x compilation-minor-mode

  > M-x next-error

  ; if emacs can't find files, set

  ; (setq compilation-search-path '("dir1" "dir2")) C-x C-e

To be continued.