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native: workaround for missing __builtin_bswap16

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Implements a workaround for
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52624

This is present in current versions of ubuntu 12.04 and debian 7.7 (stable).
This commit is contained in:
Ludwig Ortmann 2014-12-09 12:22:24 +01:00
parent e291ae4684
commit 093085b4ff
2 changed files with 11 additions and 0 deletions
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5
boards/native/Makefile.include
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@ -95,6 +95,11 @@ all-gprof: export LINKFLAGS += -pg
export INCLUDES += $(NATIVEINCLUDES) export INCLUDES += $(NATIVEINCLUDES)
# workaround for https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52624
ifneq ($(shell gcc --version | head -1 | grep -E ' (4.6|4.7)'),)
export CFLAGS += -DHAVE_NO_BUILTIN_BSWAP16
endif
# backward compatability with glibc <= 2.17 for native # backward compatability with glibc <= 2.17 for native
ifeq ($(CPU),native) ifeq ($(CPU),native)
ifeq ($(shell uname -s),Linux) ifeq ($(shell uname -s),Linux)

6
core/include/byteorder.h
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@ -275,6 +275,12 @@ static inline uint64_t NTOHLL(uint64_t v);
/* **************************** IMPLEMENTATION ***************************** */ /* **************************** IMPLEMENTATION ***************************** */
#ifdef HAVE_NO_BUILTIN_BSWAP16
static inline unsigned short __builtin_bswap16(unsigned short a)
{
return (a<<8)|(a>>8);
}
#endif
static inline uint16_t byteorder_swaps(uint16_t v) static inline uint16_t byteorder_swaps(uint16_t v)
{ {