Dear Måns Rullgård, Otavio Salvador,
On Di, 2015-07-28 at 14:39 +0100, Måns Rullgård wrote:
Otavio Salvador otavio.salvador@ossystems.com.br writes:
[snip]
There are two errors reports:
- An undefined reference to the symbol "lowlevel_init"
- A complaint about the ".rel.plt" section not being handled by the linker script.
The second error is probably caused by the first. A quick grep turns up this snippet in arch/arm/cpu/arm926ejs/mxs/mxs.c:
/* Lowlevel init isn't used on i.MX28, so just have a dummy here */ inline void lowlevel_init(void) {}
The semantics for non-static functions declared inline have changed in gcc5, causing the above (empty) function not to be emitted as an external symbol.
Since that function is only referenced from start.S, it should not be declared inline at all. This patch should thus fix your problem:
diff --git a/arch/arm/cpu/arm926ejs/mxs/mxs.c b/arch/arm/cpu/arm926ejs/mxs/mxs.c index ef130ae..b1d8721 100644 --- a/arch/arm/cpu/arm926ejs/mxs/mxs.c +++ b/arch/arm/cpu/arm926ejs/mxs/mxs.c @@ -24,7 +24,7 @@ DECLARE_GLOBAL_DATA_PTR;
/* Lowlevel init isn't used on i.MX28, so just have a dummy here */ -inline void lowlevel_init(void) {} +void lowlevel_init(void) {}
void reset_cpu(ulong ignored) __attribute__((noreturn));
I stumbled over the same problem. Unfortunatly, I did not find this patch before (only the error report from Otavia) and submitted a similar patch [1] which keeps the inline keyword.
Best regards Jörg Krause
[1] "arm: mxs: make inline function compatible for GCC 5" https://patchwork.ozlabs.org/patch/504043/