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Merge remote-tracking branch 'qatar/master'

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* qatar/master:
  Work around broken floating point limits on some systems.

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer
2014-03-10 12:03:29 +01:00
parent 4c63beeefe e854b8f9f4
commit 27b4d154ca
3 changed files with 71 additions and 0 deletions
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35
compat/float/float.h Normal file
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@ -0,0 +1,35 @@
/*
* Work around broken floating point limits on some systems.
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include_next <float.h>
#ifdef FLT_MAX
#undef FLT_MAX
#define FLT_MAX 3.40282346638528859812e+38F
#undef FLT_MIN
#define FLT_MIN 1.17549435082228750797e-38F
#undef DBL_MAX
#define DBL_MAX ((double)1.79769313486231570815e+308L)
#undef DBL_MIN
#define DBL_MIN ((double)2.22507385850720138309e-308L)
#endif

22
compat/float/limits.h Normal file
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@ -0,0 +1,22 @@
/*
* Work around broken floating point limits on some systems.
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include_next <limits.h>
#include <float.h>

14
configure vendored
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@ -1114,6 +1114,16 @@ check_builtin(){
check_code ld "$headers" "$builtin" "cc" "$@" && enable "$name"
}
check_compile_assert(){
log check_compile_assert "$@"
name=$1
headers=$2
condition=$3
shift 3
disable "$name"
check_code cc "$headers" "char c[2 * !!($condition) - 1]" "$@" && enable "$name"
}
require(){
name="$1"
header="$2"
@ -1574,6 +1584,7 @@ HAVE_LIST="
fast_clz
fast_cmov
fcntl
flt_lim
fork
getaddrinfo
gethrtime
@ -4000,6 +4011,9 @@ if enabled_all ccc libc_glibc; then
add_ldflags -Wl,-z,now # calls to libots crash without this
fi
check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" ||
add_cppflags '-I\$(SRC_PATH)/compat/float'
esc(){
echo "$*" | sed 's/%/%25/g;s/:/%3a/g'
}