--- vlc-2.2.6.orig/configure.ac	2017-05-24 12:40:16.000000000 +0200
+++ vlc-2.2.6/configure.ac	2017-06-06 22:52:45.841013479 +0200
@@ -24,7 +24,7 @@ AC_CANONICAL_BUILD
 AC_CANONICAL_HOST
 AC_PRESERVE_HELP_ORDER
 
-AM_INIT_AUTOMAKE(tar-ustar color-tests foreign)
+AM_INIT_AUTOMAKE(tar-ustar color-tests foreign subdir-objects)
 AC_CONFIG_HEADERS([config.h])
 
 # Disable with "./configure --disable-silent-rules" or "make V=1"
@@ -121,6 +121,7 @@ case "${host_os}" in
     ;;
   linux*)
     SYS=linux
+    AC_CHECK_LIB([rt], [posix_spawnp], [VLC_ADD_LIBS([libvlccore],[-lrt])], [], [])
     ;;
   bsdi*)
     SYS=bsdi
@@ -537,7 +538,7 @@ need_libc=false
 
 dnl Check for usual libc functions
 AC_CHECK_DECLS([nanosleep],,,[#include <time.h>])
-AC_CHECK_FUNCS([daemon fcntl fstatvfs fork getenv getpwuid_r isatty lstat memalign mmap open_memstream openat pread posix_fadvise posix_madvise setlocale stricmp strnicmp strptime uselocale])
+AC_CHECK_FUNCS([daemon fcntl fstatvfs fork getenv getpwuid_r isatty lstat memalign mmap open_memstream openat pread posix_fadvise posix_madvise setlocale strerror_l stricmp strnicmp strptime uselocale])
 AC_REPLACE_FUNCS([atof atoll dirfd fdopendir flockfile fsync getdelim getpid gmtime_r lldiv localtime_r nrand48 poll posix_memalign rewind setenv strcasecmp strcasestr strdup strlcpy strndup strnlen strsep strtof strtok_r strtoll swab tdestroy strverscmp])
 AC_CHECK_FUNCS(fdatasync,,
   [AC_DEFINE(fdatasync, fsync, [Alias fdatasync() to fsync() if missing.])
@@ -867,7 +868,7 @@ dnl
 dnl  Compiler warnings
 dnl
 
-RDC_PROG_CC_WFLAGS([all extra sign-compare undef pointer-arith bad-function-cast write-strings missing-prototypes volatile-register-var error-implicit-function-declaration])
+RDC_PROG_CC_WFLAGS([all extra sign-compare undef pointer-arith bad-function-cast write-strings missing-prototypes volatile-register-var])
 RDC_PROG_CC_FLAGS([-pipe])
 AC_LANG_PUSH([C++])
 RDC_PROG_CXX_WFLAGS([all extra sign-compare undef pointer-arith volatile-register-var])
@@ -2318,7 +2319,7 @@ AC_ARG_ENABLE(avcodec,
 AS_IF([test "${enable_avcodec}" != "no"], [
   PKG_CHECK_MODULES(AVCODEC,[libavcodec >= 53.34.0 libavutil >= 51.22.0], [
     PKG_CHECK_EXISTS([libavutil < 55],, [
-      AC_MSG_ERROR([libavutil versions 55 and later are not supported.])
+      AC_MSG_WARN([libavutil versions 55 and later are not supported.])
     ])
     VLC_SAVE_FLAGS
     CPPFLAGS="${CPPFLAGS} ${AVCODEC_CFLAGS}"
@@ -2328,7 +2329,7 @@ AS_IF([test "${enable_avcodec}" != "no"]
     VLC_RESTORE_FLAGS
     have_avcodec="yes"
   ],[
-    AC_MSG_ERROR([${AVCODEC_PKG_ERRORS}. Pass --disable-avcodec to ignore this error.])
+    AC_MSG_WARN([${AVCODEC_PKG_ERRORS}. Pass --disable-avcodec to ignore this error.])
   ])
 ], [
   have_avcodec="no"
@@ -2377,7 +2378,7 @@ AS_IF([test "${have_vaapi}" = "yes" -a "
   case "${avfork}" in
     ffmpeg)
       PKG_CHECK_EXISTS([libavcodec >= 57.10.100], [
-        AC_MSG_ERROR([VA API requires FFmpeg libavcodec < 57.10 or libav.])
+        AC_MSG_WARN([VA API requires FFmpeg libavcodec < 57.10 or libav.])
       ])
       ;;
   esac
@@ -2411,7 +2412,7 @@ AS_IF([test "${enable_dxva2}" != "no"],
     case "${avfork}" in
       ffmpeg)
         PKG_CHECK_EXISTS([libavcodec >= 57.10.100], [
-          AC_MSG_ERROR([DXVA2 requires FFmpeg libavcodec < 57.10 or libav.])
+          AC_MSG_WARN([DXVA2 requires FFmpeg libavcodec < 57.10 or libav.])
         ])
         ;;
     esac
@@ -2503,7 +2504,7 @@ AS_IF([test "${enable_avformat}" != "no"
       ])
       VLC_RESTORE_FLAGS
     ],[
-      AC_MSG_ERROR([${AVFORMAT_PKG_ERRORS}. Pass --disable-avformat to ignore this error.])
+      AC_MSG_WARN([${AVFORMAT_PKG_ERRORS}. Pass --disable-avformat to ignore this error.])
   ])
 ])
 AM_CONDITIONAL([HAVE_AVFORMAT], [test "${enable_avformat}" != "no"])
@@ -2532,7 +2533,7 @@ then
       ])
       VLC_RESTORE_FLAGS
     ],[
-      AC_MSG_ERROR([${SWSCALE_PKG_ERRORS}. Pass --disable-swscale to ignore this error. Proper software scaling and some video chroma conversion will be missing.])
+      AC_MSG_WARN([${SWSCALE_PKG_ERRORS}. Pass --disable-swscale to ignore this error. Proper software scaling and some video chroma conversion will be missing.])
   ])
 fi
 
@@ -3175,7 +3176,7 @@ AS_IF([test "${have_vdpau}" = "yes" -a "
     libav) av_vdpau_ver="55.26.0" ;;
     ffmpeg) av_vdpau_ver="55.42.100"
       PKG_CHECK_EXISTS([libavcodec >= 57.10.100], [
-        AC_MSG_ERROR([VDPAU requires FFmpeg libavcodec < 57.10 or libav.])
+        AC_MSG_WARN([VDPAU requires FFmpeg libavcodec < 57.10 or libav.])
       ])
       ;;
   esac
@@ -4056,16 +4057,17 @@ dnl
 AC_ARG_ENABLE(libgcrypt,
   [  --disable-libgcrypt     gcrypt support (default enabled)])
 AS_IF([test "${enable_libgcrypt}" != "no"], [
+  AC_PATH_PROG([GCRYPT_CONFIG],[libgcrypt-config],[libgcrypt-config])
   AC_CHECK_DECL([GCRYCTL_SET_THREAD_CBS], [
-    libgcrypt-config --version >/dev/null || \
+    ${GCRYPT_CONFIG} --version >/dev/null || \
         AC_MSG_ERROR([gcrypt.h present but libgcrypt-config could not be found])
     AC_CHECK_LIB(gcrypt, gcry_control, [
       have_libgcrypt="yes"
-      GCRYPT_CFLAGS="`libgcrypt-config --cflags`"
-      GCRYPT_LIBS="`libgcrypt-config --libs`"
+      GCRYPT_CFLAGS="`${GCRYPT_CONFIG} --cflags`"
+      GCRYPT_LIBS="`${GCRYPT_CONFIG} --libs`"
     ], [
       AC_MSG_ERROR([libgcrypt not found. Install libgcrypt or pass --disable-libgcrypt.])
-    ], [`libgcrypt-config --libs`])
+    ], [`${GCRYPT_CONFIG} --libs`])
   ], [
     AC_MSG_ERROR([libgcrypt version 1.1.94 or higher not found. Install libgcrypt or pass --disable-libgcrypt.])
   ], [#include <gcrypt.h>]