diff options
| -rw-r--r-- | compat/float/float.h | 35 | ||||
| -rw-r--r-- | compat/float/limits.h | 22 | ||||
| -rwxr-xr-x | configure | 14 |
3 files changed, 71 insertions, 0 deletions
diff --git a/compat/float/float.h b/compat/float/float.h new file mode 100644 index 0000000000..c69f728e32 --- /dev/null +++ b/compat/float/float.h @@ -0,0 +1,35 @@ +/* + * Work around broken floating point limits on some systems. + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; 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 diff --git a/compat/float/limits.h b/compat/float/limits.h new file mode 100644 index 0000000000..9150bc8134 --- /dev/null +++ b/compat/float/limits.h @@ -0,0 +1,22 @@ +/* + * Work around broken floating point limits on some systems. + * + * This file is part of Libav. + * + * Libav 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. + * + * Libav 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 Libav; 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> @@ -994,6 +994,16 @@ check_builtin(){ check_code ld "$headers" "$builtin" "$@" && enable "$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="$2" @@ -1360,6 +1370,7 @@ HAVE_LIST=" fast_clz fast_cmov fcntl + flt_lim fork getaddrinfo gethrtime @@ -3536,6 +3547,9 @@ if enabled_all ccc libc_glibc; then add_ldflags -Wl,-z,now # calls to libots crash without this fi +check_compile_assert flt_lim "float.h limits.h" "DBL_MAX == (double)DBL_MAX" || + add_cppflags '-I\$(SRC_PATH)/compat/float' + esc(){ echo "$*" | sed 's/%/%25/g;s/:/%3a/g' } |