function pointers in modules must have global scope

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1960 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 13 insertions, 3 deletions

diff --git a/nuttx/examples/nxflat/tests/signal/signal.c b/nuttx/examples/nxflat/tests/signal/signal.c
index ff845ec10..ff1c58305 100644
--- a/nuttx/examples/nxflat/tests/signal/signal.c
+++ b/nuttx/examples/nxflat/tests/signal/signal.c
@@ -69,7 +69,12 @@ static int sigusr2_rcvd = 0;
  * Name: sigusr1_sighandler
  ****************************************************************************/
 
-static void sigusr1_sighandler(int signo)
+/* NOTE: it is necessary for functions that are referred to by function pointers
+ * pointer to be declared with global scope (at least for ARM).  Otherwise,
+ * a relocation type that is not supported by NXFLAT is generated by GCC.
+ */
+
+void sigusr1_sighandler(int signo)
 {
   printf("sigusr1_sighandler: Received SIGUSR1, signo=%d\n", signo);
   sigusr1_rcvd = 1;
@@ -79,8 +84,13 @@ static void sigusr1_sighandler(int signo)
  * Name: sigusr2_sigaction
  ***************************************************************************/
 
+/* NOTE: it is necessary for functions that are referred to by function pointers
+ *  pointer to be declared with global scope (at least for ARM).  Otherwise,
+ * a relocation type that is not supported by NXFLAT is generated by GCC.
+ */
+
 #ifdef __USE_POSIX199309
-static void sigusr2_sigaction(int signo, siginfo_t *siginfo, void *arg)
+void sigusr2_sigaction(int signo, siginfo_t *siginfo, void *arg)
 {
   printf("sigusr2_sigaction: Received SIGUSR2, signo=%d siginfo=%p arg=%p\n",
 	 signo, siginfo, arg);
@@ -107,7 +117,7 @@ static void sigusr2_sigaction(int signo, siginfo_t *siginfo, void *arg)
   sigusr2_rcvd = 1;
 }
 #else
-static void sigusr2_sigaction(int signo)
+void sigusr2_sigaction(int signo)
 {
   printf("sigusr2_sigaction: Received SIGUSR2, signo=%d\n", signo);
   sigusr2_rcvd = 1;