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build: Use #ifdef to check for #defines

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for example, in case HAVE_MEMFD is #undef, checking with #if HAVE_MEMFD
gives a warning (gcc 5.4.1, Ubuntu)

pulsecore/shm.c: In function 'sharedmem_create':
pulsecore/shm.c:208:5: warning: "HAVE_MEMFD" is not defined [-Wundef]
 #if HAVE_MEMFD

use #ifdef or #if defined() to check for presence of a #define

Signed-off-by: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
This commit is contained in:
Peter Meerwald-Stadler 2017-03-07 16:29:30 +01:00
parent 48ba5e4957
commit a199b9045e
4 changed files with 8 additions and 8 deletions
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6
src/utils/padsp.c
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@ -2285,7 +2285,7 @@ static int dsp_ioctl(fd_info *i, unsigned long request, void*argp, int *_errno)
break;
}
#if HAVE_DECL_SOUND_PCM_READ_RATE
#ifdef HAVE_DECL_SOUND_PCM_READ_RATE
case SOUND_PCM_READ_RATE:
debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_PCM_READ_RATE\n");
@ -2295,7 +2295,7 @@ static int dsp_ioctl(fd_info *i, unsigned long request, void*argp, int *_errno)
break;
#endif
#if HAVE_DECL_SOUND_PCM_READ_CHANNELS
#ifdef HAVE_DECL_SOUND_PCM_READ_CHANNELS
case SOUND_PCM_READ_CHANNELS:
debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_PCM_READ_CHANNELS\n");
@ -2305,7 +2305,7 @@ static int dsp_ioctl(fd_info *i, unsigned long request, void*argp, int *_errno)
break;
#endif
#if HAVE_DECL_SOUND_PCM_READ_BITS
#ifdef HAVE_DECL_SOUND_PCM_READ_BITS
case SOUND_PCM_READ_BITS:
debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_PCM_READ_BITS\n");