From c4821c8e6bf1f81c6ea31e11ebc0fc1666e9337b Mon Sep 17 00:00:00 2001 From: David Robillard Date: Thu, 25 Feb 2021 10:27:59 -0500 Subject: Add exess from git@gitlab.com:drobilla/exess.git 4638b1f --- subprojects/exess/src/exess_config.h | 79 ++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 subprojects/exess/src/exess_config.h (limited to 'subprojects/exess/src/exess_config.h') diff --git a/subprojects/exess/src/exess_config.h b/subprojects/exess/src/exess_config.h new file mode 100644 index 00000000..4325484a --- /dev/null +++ b/subprojects/exess/src/exess_config.h @@ -0,0 +1,79 @@ +/* + Copyright 2021 David Robillard + + Permission to use, copy, modify, and/or distribute this software for any + purpose with or without fee is hereby granted, provided that the above + copyright notice and this permission notice appear in all copies. + + THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +*/ + +/* + Configuration header that defines reasonable defaults at compile time. + + This allows compile-time configuration from the command line (typically via + the build system) while still allowing the source to be built without any + configuration. The build system can define EXESS_NO_DEFAULT_CONFIG to disable + defaults, in which case it must define things like HAVE_FEATURE to enable + features. The design here ensures that compiler warnings or + include-what-you-use will catch any mistakes. +*/ + +#ifndef EXESS_CONFIG_H +#define EXESS_CONFIG_H + +// Define version unconditionally so a warning will catch a mismatch +#define EXESS_VERSION "0.0.1" + +#if !defined(EXESS_NO_DEFAULT_CONFIG) + +// GCC and clang: __builtin_clz() +# ifndef HAVE_BUILTIN_CLZ +# if defined(__has_builtin) +# if __has_builtin(__builtin_clz) +# define HAVE_BUILTIN_CLZ 1 +# else +# define HAVE_BUILTIN_CLZ 0 +# endif +# elif defined(__GNUC__) +# define HAVE_BUILTIN_CLZ 1 +# else +# define HAVE_BUILTIN_CLZ 0 +# endif +# endif + +// GCC and clang: __builtin_clz() +# ifndef HAVE_BUILTIN_CLZLL +# if defined(__has_builtin) +# if __has_builtin(__builtin_clzll) +# define HAVE_BUILTIN_CLZLL 1 +# else +# define HAVE_BUILTIN_CLZLL 0 +# endif +# elif defined(__GNUC__) +# define HAVE_BUILTIN_CLZLL 1 +# else +# define HAVE_BUILTIN_CLZLL 0 +# endif +# endif + +#endif // !defined(EXESS_NO_DEFAULT_CONFIG) + +/* + Make corresponding USE_FEATURE defines based on the HAVE_FEATURE defines from + above or the command line. The code checks for these using #if (not #ifdef), + so there will be an undefined warning if it checks for an unknown feature, + and this header is always required by any code that checks for features, even + if the build system defines them all. +*/ + +#define USE_BUILTIN_CLZ HAVE_BUILTIN_CLZ +#define USE_BUILTIN_CLZLL HAVE_BUILTIN_CLZLL + +#endif // EXESS_CONFIG_H -- cgit v1.2.1