enable -msse2 -mfpmath=sse on x86 machines that support it; fixes #450; fixes #263
Costa Tsaousis (ktsaou) committed
Sep 28, 2016 at 02:28 UTC
8491b31c4b58385fbe8986b9c99685ce1842b158
4 files changed
+85
-1
configure.ac
+11
-1
@@ -85,8 +85,18 @@ AC_C_INLINE
85
AC_FUNC_STRERROR_R
86
AC_C__GENERIC
87
AC_C___ATOMIC
88
-AC_CANONICAL_HOST
88
AC_CHECK_SIZEOF([void *])
89
+AC_CANONICAL_HOST
90
+
91
+AC_ARG_VAR([SSE_CANDIDATE], [C compiler flags for SSE])
92
+AS_CASE([$host_cpu],
93
+ [i?86], [SSE_CANDIDATE="yes"]
94
+)
95
+AC_SUBST([SSE_CANDIDATE])
96
+if test "${SSE_CANDIDATE}" = "yes"; then
97
+ opt="-msse2 -mfpmath=sse"
98
+ AX_CHECK_COMPILE_FLAG($opt, [CFLAGS="$CFLAGS $opt"], [])
99
+fi
100
101
AC_ARG_VAR([MATH_CFLAGS], [C compiler flags for math])
102
AC_ARG_VAR([MATH_LIBS], [linker flags for math])
m4/ax_c___atomic.m4
renamed
m4/ax_c__generic.m4
renamed
m4/ax_check_compile_flag.m4
new
+74
@@ -0,0 +1,74 @@
1
+# ===========================================================================
2
+# http://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
3
+# ===========================================================================
4
+#
5
+# SYNOPSIS
6
+#
7
+# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
8
+#
9
+# DESCRIPTION
10
+#
11
+# Check whether the given FLAG works with the current language's compiler
12
+# or gives an error. (Warnings, however, are ignored)
13
+#
14
+# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
15
+# success/failure.
16
+#
17
+# If EXTRA-FLAGS is defined, it is added to the current language's default
18
+# flags (e.g. CFLAGS) when the check is done. The check is thus made with
19
+# the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to
20
+# force the compiler to issue an error when a bad flag is given.
21
+#
22
+# INPUT gives an alternative input source to AC_COMPILE_IFELSE.
23
+#
24
+# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
25
+# macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
26
+#
27
+# LICENSE
28
+#
29
+# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
30
+# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
31
+#
32
+# This program is free software: you can redistribute it and/or modify it
33
+# under the terms of the GNU General Public License as published by the
34
+# Free Software Foundation, either version 3 of the License, or (at your
35
+# option) any later version.
36
+#
37
+# This program is distributed in the hope that it will be useful, but
38
+# WITHOUT ANY WARRANTY; without even the implied warranty of
39
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
40
+# Public License for more details.
41
+#
42
+# You should have received a copy of the GNU General Public License along
43
+# with this program. If not, see <http://www.gnu.org/licenses/>.
44
+#
45
+# As a special exception, the respective Autoconf Macro's copyright owner
46
+# gives unlimited permission to copy, distribute and modify the configure
47
+# scripts that are the output of Autoconf when processing the Macro. You
48
+# need not follow the terms of the GNU General Public License when using
49
+# or distributing such scripts, even though portions of the text of the
50
+# Macro appear in them. The GNU General Public License (GPL) does govern
51
+# all other use of the material that constitutes the Autoconf Macro.
52
+#
53
+# This special exception to the GPL applies to versions of the Autoconf
54
+# Macro released by the Autoconf Archive. When you make and distribute a
55
+# modified version of the Autoconf Macro, you may extend this special
56
+# exception to the GPL to apply to your modified version as well.
57
+
58
+#serial 4
59
+
60
+AC_DEFUN([AX_CHECK_COMPILE_FLAG],
61
+[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
62
+AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
63
+AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
64
+ ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
65
+ _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
66
+ AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
67
+ [AS_VAR_SET(CACHEVAR,[yes])],
68
+ [AS_VAR_SET(CACHEVAR,[no])])
69
+ _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
70
+AS_VAR_IF(CACHEVAR,yes,
71
+ [m4_default([$2], :)],
72
+ [m4_default([$3], :)])
73
+AS_VAR_POPDEF([CACHEVAR])dnl
74
+])dnl AX_CHECK_COMPILE_FLAGS