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Port to Tiny C on x86-64

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This allows Emacs to build on Ubuntu 21.10 x86-64 with
‘./configure --without-modules CC=tcc’.
* configure.ac (GC_SETJMP_WORKS):
Accept __x86_64__ as an alias for __amd64__.
* src/lisp.h (alignas): Provide a no-op substitute.
This commit is contained in:
Paul Eggert 2021-12-03 13:05:31 -08:00
parent 397a6a73d7
commit 1e2bc1bbf4
2 changed files with 6 additions and 0 deletions
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1
configure.ac
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@ -5426,6 +5426,7 @@ case $opsys in
#if defined __i386__ || defined __sparc__ || defined __mc68000__ \
|| defined __alpha__ || defined __mips__ || defined __s390__ \
|| defined __arm__ || defined __powerpc__ || defined __amd64__ \
|| defined __x86_64__ \
|| defined __ia64__ || defined __sh__
/* ok */
#else

5
src/lisp.h
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@ -259,6 +259,11 @@ DEFINE_GDB_SYMBOL_BEGIN (EMACS_INT, VALMASK)
# define VALMASK (USE_LSB_TAG ? - (1 << GCTYPEBITS) : VAL_MAX)
DEFINE_GDB_SYMBOL_END (VALMASK)
/* Ignore 'alignas' on compilers lacking it. */
#if !defined alignas && !defined __alignas_is_defined
# define alignas(a)
#endif
/* Minimum alignment requirement for Lisp objects, imposed by the
internal representation of tagged pointers. It is 2**GCTYPEBITS if
USE_LSB_TAG, 1 otherwise. It must be a literal integer constant,