The test program for "whether a program can dlopen itself" generates a compiler warning, which turns into a failure when building with "-Wall -Werror" in CFLAGS. The error is in the libltdl/m4/libtool.m4 file, and is due to the "fnord" function containing an unused variable. Please find attached a simple patch for this issue.
2010-06-15 Philip Allison <philip.alli...@smoothwall.net>
* libltdl/m4/libtool.m4 (_LT_TRY_DLOPEN_SELF): Fix unused
variable warning in test program.
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Philip Allison
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diff --git a/libltdl/m4/libtool.m4 b/libltdl/m4/libtool.m4
index 22924a8..d35aab0 100644
--- a/libltdl/m4/libtool.m4
+++ b/libltdl/m4/libtool.m4
@@ -1658,10 +1658,10 @@ else
/* When -fvisbility=hidden is used, assume the code has been annotated
correspondingly for the symbols needed. */
#if defined(__GNUC__) && (((__GNUC__ == 3) && (__GNUC_MINOR__ >= 3)) || (__GNUC__ > 3))
-void fnord () __attribute__((visibility("default")));
+int fnord () __attribute__((visibility("default")));
#endif
-void fnord () { int i=42; }
+int fnord () { return 42; }
int main ()
{
void *self = dlopen (0, LT_DLGLOBAL|LT_DLLAZY_OR_NOW);
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