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Use alloca()/_alloca() on C89/C90 compilers without VLA

This commit is contained in:
carlo-bramini 2017-11-12 16:16:34 +01:00
parent f9ca336a2d
commit b8766aef67
3 changed files with 24 additions and 0 deletions
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12
CMakeLists.txt
View File

@ -133,6 +133,18 @@ include ( TestVLA )
include ( TestBigEndian )
test_big_endian ( WORDS_BIGENDIAN )
unset ( HAVE_ALLOCA CACHE )
CHECK_FUNCTION_EXISTS ( "alloca" HAVE_ALLOCA )
if ( HAVE_ALLOCA )
set ( HAVE_ALLOCA 1 )
endif ( HAVE_ALLOCA )
unset ( HAVE__ALLOCA CACHE )
CHECK_FUNCTION_EXISTS ( "_alloca" HAVE__ALLOCA )
if ( HAVE__ALLOCA )
set ( HAVE__ALLOCA 1 )
endif ( HAVE__ALLOCA )
unset ( LIBFLUID_CPPFLAGS CACHE )
unset ( LIBFLUID_LIBS CACHE )
unset ( FLUID_CPPFLAGS CACHE )

6
src/config.cmake
View File

@ -133,6 +133,12 @@
/* Define to 1 if you have the inet_ntop() function. */
#cmakedefine HAVE_INETNTOP @HAVE_INETNTOP@
/* Define to 1 if you have the alloca() function. */
#cmakedefine HAVE_ALLOCA @HAVE_ALLOCA@
/* Define to 1 if you have the _alloca() function. */
#cmakedefine HAVE__ALLOCA @HAVE__ALLOCA@
/* Define to enable JACK driver */
#cmakedefine JACK_SUPPORT @JACK_SUPPORT@

6
src/utils/fluidsynth_priv.h
View File

@ -180,6 +180,12 @@ typedef int fluid_socket_t;
#if defined(SUPPORTS_VLA)
# define FLUID_DECLARE_VLA(_type, _name, _len) \
_type _name[_len]
#elif defined HAVE_ALLOCA
# define FLUID_DECLARE_VLA(_type, _name, _len) \
_type * _name = (_type *)alloca(_len * sizeof(_type))
#elif defined HAVE__ALLOCA
# define FLUID_DECLARE_VLA(_type, _name, _len) \
_type * _name = (_type *)_alloca(_len * sizeof(_type))
#else
# define FLUID_DECLARE_VLA(_type, _name, _len) \
_type* _name = g_newa(_type, (_len))