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authorDavid Robillard <d@drobilla.net>2021-01-01 14:15:49 +0100
committerDavid Robillard <d@drobilla.net>2021-01-01 17:48:20 +0100
commit4a54d784af0bec03fdc1f9889157a8c653969db9 (patch)
tree2c94dec6c4369a9a341cf9da4f4dbcce28cd77cf /src/serd_config.h
parentd101d926946a5e8067a90d157b6553aae7bddc19 (diff)
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Remove the need for a generated configuration header
Diffstat (limited to 'src/serd_config.h')
-rw-r--r--src/serd_config.h115
1 files changed, 115 insertions, 0 deletions
diff --git a/src/serd_config.h b/src/serd_config.h
new file mode 100644
index 00000000..0038a981
--- /dev/null
+++ b/src/serd_config.h
@@ -0,0 +1,115 @@
+/*
+ Copyright 2021 David Robillard <http://drobilla.net>
+
+ 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 SERD_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 SERD_CONFIG_H
+#define SERD_CONFIG_H
+
+// Define version unconditionally so a warning will catch a mismatch
+#define SERD_VERSION "0.30.7"
+
+#if !defined(SERD_NO_DEFAULT_CONFIG)
+
+// We need unistd.h to check _POSIX_VERSION
+# ifndef SERD_NO_POSIX
+# ifdef __has_include
+# if __has_include(<unistd.h>)
+# include <unistd.h>
+# endif
+# elif defined(__unix__)
+# include <unistd.h>
+# endif
+# endif
+
+// C99 and C++11: aligned_alloc()
+# ifndef HAVE_ALIGNED_ALLOC
+# if !defined(__APPLE__) && !defined(_WIN32)
+# if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L
+# define HAVE_ALIGNED_ALLOC
+# elif defined(__cplusplus) && __cplusplus >= 201103L)
+# define HAVE_ALIGNED_ALLOC
+# endif
+# endif
+# endif
+
+// POSIX.1-2001: fileno()
+# ifndef HAVE_FILENO
+# if defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112L
+# define HAVE_FILENO
+# endif
+# endif
+
+// POSIX.1-2001: posix_fadvise()
+# ifndef HAVE_POSIX_FADVISE
+# ifndef __APPLE__
+# if defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112L
+# define HAVE_POSIX_FADVISE
+# endif
+# endif
+# endif
+
+// POSIX.1-2001: posix_memalign()
+# ifndef HAVE_POSIX_MEMALIGN
+# if defined(_POSIX_VERSION) && _POSIX_VERSION >= 200112L
+# define HAVE_POSIX_MEMALIGN
+# endif
+# endif
+
+#endif // !defined(SERD_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.
+*/
+
+#ifdef HAVE_ALIGNED_ALLOC
+# define USE_ALIGNED_ALLOC 1
+#else
+# define USE_ALIGNED_ALLOC 0
+#endif
+
+#ifdef HAVE_FILENO
+# define USE_FILENO 1
+#else
+# define USE_FILENO 0
+#endif
+
+#ifdef HAVE_POSIX_FADVISE
+# define USE_POSIX_FADVISE 1
+#else
+# define USE_POSIX_FADVISE 0
+#endif
+
+#ifdef HAVE_POSIX_MEMALIGN
+# define USE_POSIX_MEMALIGN 1
+#else
+# define USE_POSIX_MEMALIGN 0
+#endif
+
+#endif // SERD_CONFIG_H