This was tested with Alpine Linux 3.5/musl-1.1.15/gcc-6.2.1/vdr-2.3.2. While building for Alpine, add -lintl to LIBS:

echo 'LIBS += -lintl' >> Make.config

Some notes:

1. __attribute__((__format_arg__(n))) is supported since gcc-2.8 (1998).

2. freopen() can be reworked to work with musl if it really matters.

3. Musl doesn't define __MUSL__ or whatever. Checking __GLIBC__ is definitely not perfect, but VDR build system can't run tests for the moment.

--- i18n.h | 2 +- osd.c | 2 +- thread.c | 4 +++- tools.c | 2 +- tools.h | 12 +++++++++++- vdr.c | 6 ++++++ 6 files changed, 23 insertions(+), 5 deletions(-)

diff --git a/i18n.h b/i18n.h index f8ad9de..b002bbf 100644 --- a/i18n.h +++ b/i18n.h @@ -46,7 +46,7 @@ const cStringList *I18nLanguages(void); ///< have an actual locale installed. The rest are just dummy entries ///< to allow having three letter language codes for other languages ///< that have no actual locale on this system. -const char *I18nTranslate(const char *s, const char *Plugin = NULL) __attribute_format_arg__(1); +const char *I18nTranslate(const char *s, const char *Plugin = NULL) __attribute__((__format_arg__ (1))); ///< Translates the given string (with optional Plugin context) into ///< the current language. If no translation is available, the original ///< string will be returned. diff --git a/osd.c b/osd.c index 524700a..ef975f5 100644 --- a/osd.c +++ b/osd.c @@ -12,7 +12,7 @@ #include <stdlib.h> #include <sys/ioctl.h> #include <sys/stat.h> -#include <sys/unistd.h> +#include <unistd.h> #include "device.h" #include "tools.h"

diff --git a/thread.c b/thread.c index 47eb977..58dba43 100644 --- a/thread.c +++ b/thread.c @@ -155,7 +155,9 @@ cRwLock::cRwLock(bool PreferWriter) writeLockThreadId = 0; pthread_rwlockattr_t attr; pthread_rwlockattr_init(&attr); +#if defined(__GLIBC__) pthread_rwlockattr_setkind_np(&attr, PreferWriter ? PTHREAD_RWLOCK_PREFER_WRITER_NP : PTHREAD_RWLOCK_PREFER_READER_NP); +#endif pthread_rwlock_init(&rwlock, &attr); }

@@ -205,7 +207,7 @@ cMutex::cMutex(void) locked = 0; pthread_mutexattr_t attr; pthread_mutexattr_init(&attr); - pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK_NP); + pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ERRORCHECK); pthread_mutex_init(&mutex, &attr); }

diff --git a/tools.c b/tools.c index 754673d..fef9d2d 100644 --- a/tools.c +++ b/tools.c @@ -640,7 +640,7 @@ char *ReadLink(const char *FileName) { if (!FileName) return NULL; - char *TargetName = canonicalize_file_name(FileName); + char *TargetName = realpath(FileName, NULL); if (!TargetName) { if (errno == ENOENT) // file doesn't exist TargetName = strdup(FileName); diff --git a/tools.h b/tools.h index 73cca5a..03f5fd1 100644 --- a/tools.h +++ b/tools.h @@ -28,6 +28,16 @@ #include <sys/types.h> #include "thread.h"

+#ifndef ACCESSPERMS +# define ACCESSPERMS (S_IRWXU|S_IRWXG|S_IRWXO) /* 0777 */ +#endif +#ifndef ALLPERMS +# define ALLPERMS (S_ISUID|S_ISGID|S_ISVTX|S_IRWXU|S_IRWXG|S_IRWXO)/* 07777 */ +#endif +#ifndef DEFFILEMODE +# define DEFFILEMODE (S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)/* 0666*/ +#endif + typedef unsigned char uchar;

extern int SysLogLevel; @@ -738,7 +748,7 @@ public: data[i] = T(0); size = 0; } - void Sort(__compar_fn_t Compare) + void Sort(int (*Compare)(const void *, const void *)) { qsort(data, size, sizeof(T), Compare); } diff --git a/vdr.c b/vdr.c index 8a49471..c2a82aa 100644 --- a/vdr.c +++ b/vdr.c @@ -670,12 +670,18 @@ int main(int argc, char *argv[]) } } else if (Terminal) { +#ifdef __GLIBC__ // Claim new controlling terminal stdin = freopen(Terminal, "r", stdin); stdout = freopen(Terminal, "w", stdout); stderr = freopen(Terminal, "w", stderr); HasStdin = true; tcgetattr(STDIN_FILENO, &savedTm); +#else + // stdin, stdout, stderr are declared FILE const* by musl C library + fprintf(stderr, "Option '-t' is only supported if VDR has been built against glibc.\n"); + return 2; +#endif }

isyslog("VDR version %s started", VDRVERSION);