GCC 5 uses C99 inline semantics. To generate external visibility in C99 for the lowlevel_init() function must be declared with extern inline [1].

The GNU89 inline semantic is the same as C99 extern inline.

Use the __GNUC_STDC_INLINE__ macro to detect if C99 inline semantic will be used by GCC.

Fixes the build error "undefined reference to `lowlevel_init'" for mx28 based targets.

[1] "Different semantics for inline functions" https://gcc.gnu.org/gcc-5/porting_to.html

Signed-off-by: Jörg Krause joerg.krause@embedded.rocks --- arch/arm/cpu/arm926ejs/mxs/mxs.c | 3 +++ 1 file changed, 3 insertions(+)

diff --git a/arch/arm/cpu/arm926ejs/mxs/mxs.c b/arch/arm/cpu/arm926ejs/mxs/mxs.c index ef130ae..439396b 100644 --- a/arch/arm/cpu/arm926ejs/mxs/mxs.c +++ b/arch/arm/cpu/arm926ejs/mxs/mxs.c @@ -24,6 +24,9 @@ DECLARE_GLOBAL_DATA_PTR;

/* Lowlevel init isn't used on i.MX28, so just have a dummy here */ +#if defined(__GNUC_STDC_INLINE__) /* e.g. GCC 5.x default */ +extern +#endif inline void lowlevel_init(void) {}

void reset_cpu(ulong ignored) __attribute__((noreturn));