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Pacify GCC on C library without glibc API

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Without this change, with --enable-gcc-warnings GCC would complain
“error: redundant redeclaration of ‘aligned_alloc’”.
* configure.ac: Simplify aligned_alloc testing.
* src/alloc.c (aligned_alloc): Don’t use if DARWIN_OS,
since the simplified configure.ac no longer checks for that.
Don’t declare if HAVE_ALIGNED_ALLOC.
Correct misspelling of HAVE_ALIGNED_ALLOC in ifdef.
This commit is contained in:
Paul Eggert 2016-01-30 18:38:51 -08:00
parent 71b20b31c8
commit 93b144bbaa
2 changed files with 8 additions and 11 deletions
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10
configure.ac
View file

@ -3806,14 +3806,8 @@ getpwent endpwent getgrent endgrent \
cfmakeraw cfsetspeed copysign __executable_start log2)
LIBS=$OLD_LIBS
dnl No need to check for aligned_alloc and posix_memalign if using
dnl gmalloc.o, as it supplies them, unless we're using hybrid_malloc.
dnl Don't use these functions on Darwin as they are incompatible with
dnl unexmacosx.c.
if (test -z "$GMALLOC_OBJ" || test "$hybrid_malloc" = yes) \
&& test "$opsys" != darwin; then
AC_CHECK_FUNCS([aligned_alloc posix_memalign], [break])
fi
dnl No need to check for posix_memalign if aligned_alloc works.
AC_CHECK_FUNCS([aligned_alloc posix_memalign], [break])
dnl Cannot use AC_CHECK_FUNCS
AC_CACHE_CHECK([for __builtin_unwind_init],

9
src/alloc.c
View file

@ -1105,15 +1105,18 @@ lisp_free (void *block)
/* Use aligned_alloc if it or a simple substitute is available.
Address sanitization breaks aligned allocation, as of gcc 4.8.2 and
clang 3.3 anyway. */
clang 3.3 anyway. Aligned allocation is incompatible with
unexmacosx.c, so don't use it on Darwin. */
#if ! ADDRESS_SANITIZER
#if ! ADDRESS_SANITIZER && ! DARWIN_OS
# if !defined SYSTEM_MALLOC && !defined DOUG_LEA_MALLOC && !defined HYBRID_MALLOC
# define USE_ALIGNED_ALLOC 1
# ifndef HAVE_ALIGNED_ALLOC
/* Defined in gmalloc.c. */
void *aligned_alloc (size_t, size_t);
# endif
# elif defined HYBRID_MALLOC
# if defined ALIGNED_ALLOC || defined HAVE_POSIX_MEMALIGN
# if defined HAVE_ALIGNED_ALLOC || defined HAVE_POSIX_MEMALIGN
# define USE_ALIGNED_ALLOC 1
# define aligned_alloc hybrid_aligned_alloc
/* Defined in gmalloc.c. */