[petsc-dev] Fix errors for petsc-3.7.3/petsc/src/ts/examples/tutorials/ex29.c

[Lulu Liu]

When I try to make ex29 in the directory
/petsc-3.7.3/petsc/src/ts/examples/tutorials/,  it shows following errors.
It seems that we need to  define Mat J (or other names)  instead of Mat I).
Thanks!


/Users/lulu/petsc/petsc-3.7.3/petsc/src/ts/examples/tutorials/ex29.c:42:18:
error:
      expected identifier or '('
 * Mat            I;*
/usr/include/complex.h:42:11: note: expanded from macro 'I'
#define I _Complex_I
          ^
/usr/include/complex.h:40:21: note: expanded from macro '_Complex_I'
#define _Complex_I (__extension__ 1.0iF)
                    ^
/Users/lulu/petsc/petsc-3.7.3/petsc/src/ts/examples/tutorials/ex29.c:42:18:
error:
      expected ')'
/usr/include/complex.h:42:11: note: expanded from macro 'I'
#define I _Complex_I
          ^
/usr/include/complex.h:40:21: note: expanded from macro '_Complex_I'
#define _Complex_I (__extension__ 1.0iF)
                    ^
/Users/lulu/petsc/petsc-3.7.3/petsc/src/ts/examples/tutorials/ex29.c:42:18:
note:
      to match this '('
/usr/include/complex.h:42:11: note: expanded from macro 'I'
#define I _Complex_I
          ^
/usr/include/complex.h:40:20: note: expanded from macro '_Complex_I'
#define _Complex_I (__extension__ 1.0iF)
                   ^
/Users/lulu/petsc/petsc-3.7.3/petsc/src/ts/examples/tutorials/ex29.c:58:41:
error:
      cannot take the address of an rvalue of type '_Complex float'
  ierr = DMCreateInterpolation(cdmc,cdm,&I,&vscale);CHKERRQ(ierr);
                                        ^~
/Users/lulu/petsc/petsc-3.7.3/petsc/src/ts/examples/tutorials/ex29.c:59:22:
error:
      passing '_Complex float' to parameter of incompatible type 'Mat'
      (aka 'struct _p_Mat *')
  ierr = MatRestrict(I,c,cc);CHKERRQ(ierr);
                     ^
/usr/include/complex.h:42:11: note: expanded from macro 'I'
#define I _Complex_I
          ^~~~~~~~~~
/usr/include/complex.h:40:20: note: expanded from macro '_Complex_I'
#define _Complex_I (__extension__ 1.0iF)
                   ^~~~~~~~~~~~~~~~~~~~~
/Users/lulu/petsc/petsc-3.7.3/petsc/include/petscmat.h:557:44: note: passing
      argument to parameter here
PETSC_EXTERN PetscErrorCode MatRestrict(Mat,Vec,Vec);
                                           ^
/Users/lulu/petsc/petsc-3.7.3/petsc/src/ts/examples/tutorials/ex29.c:62:21:
error:
      cannot take the address of an rvalue of type '_Complex float'
  ierr = MatDestroy(&I);CHKERRQ(ierr);
                    ^~
5 errors generated.
make: *** [ex29.o] Error 1

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