Remove the need for a generated configuration header

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