error: implicit declaration of function 'pthread_create_fptr_init' is invalid in C99

./autogen.sh \
&& ./configure --prefix=/usr/local  --enable-static   --enable-autogen --enable-xmalloc --with-static-libunwind=/usr/local/lib/libunwind.a --enable-lazy-lock --with-jemalloc-prefix='' \
&& make -j16

...
gcc -std=gnu11 -Werror=unknown-warning-option -Wall -Wextra -Wshorten-64-to-32 -Wsign-compare -Wundef -Wno-format-zero-length -Wpointer-arith -Wno-missing-braces -Wno-missing-field-initializers -pipe -g3 -Wimplicit-fallthrough -O3 -funroll-loops -fPIC -DPIC -c -D_REENTRANT -Iinclude -Iinclude -DJEMALLOC_NO_PRIVATE_NAMESPACE -o src/edata_cache.sym.o src/edata_cache.c
src/background_thread.c:768:6: error: implicit declaration of function 'pthread_create_fptr_init' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
            pthread_create_fptr_init()) {
            ^
src/background_thread.c:768:6: note: did you mean 'pthread_create_wrapper_init'?
src/background_thread.c:34:1: note: 'pthread_create_wrapper_init' declared here
pthread_create_wrapper_init(void) {
^
1 error generated.
make: *** [src/background_thread.sym.o] Error 1
make: *** Waiting for unfinished jobs....

1 files changed, 33 insertions, 33 deletions

diff --git a/src/background_thread.c b/src/background_thread.c
index f22174d6..3171dd31 100644
--- a/src/background_thread.c
+++ b/src/background_thread.c
@@ -46,6 +46,39 @@ pthread_create_wrapper(pthread_t *__restrict thread, const pthread_attr_t *attr,
 
 	return pthread_create_fptr(thread, attr, start_routine, arg);
 }
+
+#ifdef JEMALLOC_HAVE_DLSYM
+#include <dlfcn.h>
+#endif
+
+static bool
+pthread_create_fptr_init(void) {
+	if (pthread_create_fptr != NULL) {
+		return false;
+	}
+	/*
+	 * Try the next symbol first, because 1) when use lazy_lock we have a
+	 * wrapper for pthread_create; and 2) application may define its own
+	 * wrapper as well (and can call malloc within the wrapper).
+	 */
+#ifdef JEMALLOC_HAVE_DLSYM
+	pthread_create_fptr = dlsym(RTLD_NEXT, "pthread_create");
+#else
+	pthread_create_fptr = NULL;
+#endif
+	if (pthread_create_fptr == NULL) {
+		if (config_lazy_lock) {
+			malloc_write("<jemalloc>: Error in dlsym(RTLD_NEXT, "
+			    "\"pthread_create\")\n");
+			abort();
+		} else {
+			/* Fall back to the default symbol. */
+			pthread_create_fptr = pthread_create;
+		}
+	}
+
+	return false;
+}
 #endif /* JEMALLOC_PTHREAD_CREATE_WRAPPER */
 
 #ifndef JEMALLOC_BACKGROUND_THREAD
@@ -710,39 +743,6 @@ background_thread_stats_read(tsdn_t *tsdn, background_thread_stats_t *stats) {
 #undef BILLION
 #undef BACKGROUND_THREAD_MIN_INTERVAL_NS
 
-#ifdef JEMALLOC_HAVE_DLSYM
-#include <dlfcn.h>
-#endif
-
-static bool
-pthread_create_fptr_init(void) {
-	if (pthread_create_fptr != NULL) {
-		return false;
-	}
-	/*
-	 * Try the next symbol first, because 1) when use lazy_lock we have a
-	 * wrapper for pthread_create; and 2) application may define its own
-	 * wrapper as well (and can call malloc within the wrapper).
-	 */
-#ifdef JEMALLOC_HAVE_DLSYM
-	pthread_create_fptr = dlsym(RTLD_NEXT, "pthread_create");
-#else
-	pthread_create_fptr = NULL;
-#endif
-	if (pthread_create_fptr == NULL) {
-		if (config_lazy_lock) {
-			malloc_write("<jemalloc>: Error in dlsym(RTLD_NEXT, "
-			    "\"pthread_create\")\n");
-			abort();
-		} else {
-			/* Fall back to the default symbol. */
-			pthread_create_fptr = pthread_create;
-		}
-	}
-
-	return false;
-}
-
 /*
  * When lazy lock is enabled, we need to make sure setting isthreaded before
  * taking any background_thread locks.  This is called early in ctl (instead of