vty: Support platforms that don't support pthread_getname_np()
pthread_getname_np() is a non-portable extension of pthreads. While
it exists in glibc, for example musl didn't have it until rather
recently (April 2021) and there still hasn't yet been a musl release
with this change, resulting even current OpenWRT not yet supporting
pthread_getname_np.
So let's check if pthread_getname_np is supported, and only use it
in that case.
Change-Id: Ibd01485af24e2fe574006f8d049bf37226dda966
diff --git a/configure.ac b/configure.ac
index 0210926..990d0e7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -78,6 +78,24 @@
# check for pthread (PTHREAD_CFLAGS, PTHREAD_LIBS)
AX_PTHREAD
+AC_MSG_CHECKING(for pthread_getname_np(pthread_t, char*, size_t))
+saved_CFLAGS="$CFLAGS"
+saved_LIBS="$LIBS"
+CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
+LIBS="$LIBS $PTHREAD_LIBS"
+AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [#define _GNU_SOURCE
+ #include <pthread.h>],
+ [pthread_getname_np(pthread_self(),"example",0)])],
+ [AC_MSG_RESULT(yes)
+ AC_DEFINE(HAVE_PTHREAD_GETNAME_NP,1,
+ [Have function pthread_setname_np(const char*)])],
+ [AC_MSG_RESULT(no)])
+CFLAGS="$saved_CFLAGS"
+LIBS="$saved_LIBS"
+
+
# check for old glibc < 2.17 to get clock_gettime
AC_SEARCH_LIBS([clock_gettime], [rt posix4],
[AC_DEFINE(HAVE_CLOCK_GETTIME, 1, [Define if clock_gettime is available])