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Add support for __builtin_bswap16.

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This commit is contained in:
Dag-Erling Smørgrav 2016-09-15 11:09:34 +02:00
parent 54cbd9c65b
commit 94a942caf0
1 changed files with 3 additions and 1 deletions
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4
m4/ax_gcc_builtin.m4
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@ -24,6 +24,7 @@
# The macro currently supports the following built-in functions:
#
# __builtin_assume_aligned
# __builtin_bswap16
# __builtin_bswap32
# __builtin_bswap64
# __builtin_choose_expr
@ -90,7 +91,7 @@
# and this notice are preserved. This file is offered as-is, without any
# warranty.
#serial 2
#serial 3
AC_DEFUN([AX_GCC_BUILTIN], [
AS_VAR_PUSHDEF([ac_var], [ax_cv_have_$1])
@ -99,6 +100,7 @@ AC_DEFUN([AX_GCC_BUILTIN], [
AC_LINK_IFELSE([AC_LANG_PROGRAM([], [
m4_case([$1],
[__builtin_assume_aligned], [$1("", 0)],
[__builtin_bswap16], [$1(0)],
[__builtin_bswap32], [$1(0)],
[__builtin_bswap64], [$1(0)],
[__builtin_choose_expr], [$1(0, 0, 0)],