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mpi: Suppress set-but-unused-variables warnings.

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* include/types.h (GNUPG_GCC_ATTR_UNUSED): Define for gcc >= 3.5.
* mpi/mpih-div.c (mpihelp_divmod_1, mpihelp_mod_1): Mark dummy as
 unused.
* mpi/mpi-internal.h (UDIV_QRNND_PREINV): Mark _ql as unused.
--

Due to the use of macros and longlong.h, we use variables which are
only used by some architectures.  At least gcc 4.7.2 prints new
warnings about set but not used variables.  This patch silences them.
This commit is contained in:
Werner Koch 2014-08-20 13:25:17 +02:00
parent ecf2728230
commit b89f57fe5d
3 changed files with 13 additions and 3 deletions
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9
include/types.h
View File

@ -143,4 +143,13 @@ struct string_list {
typedef struct string_list *STRLIST; typedef struct string_list *STRLIST;
typedef struct string_list *strlist_t; typedef struct string_list *strlist_t;
#if __GNUC__ > 2 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 5 )
# define GNUPG_GCC_ATTR_UNUSED __attribute__ ((unused))
#else
# define GNUPG_GCC_ATTR_UNUSED
#endif
#endif /*G10_TYPES_H*/ #endif /*G10_TYPES_H*/

3
mpi/mpi-internal.h
View File

@ -157,7 +157,8 @@ typedef int mpi_size_t; /* (must be a signed type) */
*/ */
#define UDIV_QRNND_PREINV(q, r, nh, nl, d, di) \ #define UDIV_QRNND_PREINV(q, r, nh, nl, d, di) \
do { \ do { \
mpi_limb_t _q, _ql, _r; \ mpi_limb_t _ql GNUPG_GCC_ATTR_UNUSED; \
mpi_limb_t _q, _r; \
mpi_limb_t _xh, _xl; \ mpi_limb_t _xh, _xl; \
umul_ppmm (_q, _ql, (nh), (di)); \ umul_ppmm (_q, _ql, (nh), (di)); \
_q += (nh); /* DI is 2**BITS_PER_MPI_LIMB too small */ \ _q += (nh); /* DI is 2**BITS_PER_MPI_LIMB too small */ \

4
mpi/mpih-div.c
View File

@ -49,7 +49,7 @@ mpihelp_mod_1(mpi_ptr_t dividend_ptr, mpi_size_t dividend_size,
{ {
mpi_size_t i; mpi_size_t i;
mpi_limb_t n1, n0, r; mpi_limb_t n1, n0, r;
int dummy; int dummy GNUPG_GCC_ATTR_UNUSED;
/* Botch: Should this be handled at all? Rely on callers? */ /* Botch: Should this be handled at all? Rely on callers? */
if( !dividend_size ) if( !dividend_size )
@ -398,7 +398,7 @@ mpihelp_divmod_1( mpi_ptr_t quot_ptr,
{ {
mpi_size_t i; mpi_size_t i;
mpi_limb_t n1, n0, r; mpi_limb_t n1, n0, r;
int dummy; int dummy GNUPG_GCC_ATTR_UNUSED;
if( !dividend_size ) if( !dividend_size )
return 0; return 0;