alsa-lib: provide dummy definitions of RTLD_* if necessary
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The FLAT GNU toolchain (e.g. blackfin) doesn't include the dlfcn.h header
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file, so we need to guard that include. Additionally, provide dummy
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definitions for parameters RTLD_GLOBAL / RTLD_NOW which are normally
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provided by dlfcn.h.
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Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
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[Thomas: don't add separate dlmisc.h, move dummy defs to global.h]
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Signed-off-by: Thomas De Schampheleire <thomas.de.schampheleire@gmail.com>
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diff --git a/include/global.h b/include/global.h
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--- a/include/global.h
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+++ b/include/global.h
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@@ -97,6 +97,16 @@ extern struct snd_dlsym_link *snd_dlsym_
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/** \brief Returns the version of a dynamic symbol as a string. */
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#define SND_DLSYM_VERSION(version) __STRING(version)
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+/* RTLD_NOW and RTLD_GLOBAL (used for 'mode' in snd_dlopen) are not defined
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+ * on all arches (e.g. blackfin), so provide a dummy definition here. */
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+#ifndef RTLD_NOW
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+#define RTLD_NOW 0
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+#endif
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+
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+#ifndef RTLD_GLOBAL
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+#define RTLD_GLOBAL 0
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+#endif
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+
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void *snd_dlopen(const char *file, int mode);
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void *snd_dlsym(void *handle, const char *name, const char *version);
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int snd_dlclose(void *handle);
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diff --git a/modules/mixer/simple/sbasedl.c b/modules/mixer/simple/sbasedl.c
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--- a/modules/mixer/simple/sbasedl.c
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+++ b/modules/mixer/simple/sbasedl.c
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@@ -27,7 +27,9 @@
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <math.h>
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+#include "config.h"
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+#ifdef HAVE_DLFCN
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#include <dlfcn.h>
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+#endif
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-#include "config.h"
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#include "asoundlib.h"
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#include "mixer_abst.h"
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diff --git a/src/mixer/simple_abst.c b/src/mixer/simple_abst.c
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--- a/src/mixer/simple_abst.c
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+++ b/src/mixer/simple_abst.c
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@@ -34,7 +34,9 @@
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <math.h>
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+#include "config.h"
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+#ifdef HAVE_DLFCN
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#include <dlfcn.h>
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+#endif
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-#include "config.h"
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#include "asoundlib.h"
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#include "mixer_simple.h"
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