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eal: fix compiler detection in public headers

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RTE_TOOLCHAIN_* macros are defining the target compiler.
Some API may be used in a host application like pmdinfogen.
That's why the the public headers should check the effective compiler
in use instead of the target compiler.

Detecting the compiler with macros is easy, except for __GNUC__
which is defined in all compilers supporting some GNU compatibility.

It is improved by defining RTE_CC_CLANG, RTE_CC_ICC and RTE_CC_GCC.
The extra macro RTE_CC_IS_GNU is defined to 0 or 1 in GCC case,
so it can be used simply with #if.

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
This commit is contained in:
Thomas Monjalon 2020-03-16 13:04:53 +01:00
parent 61669ecb92
commit 0c9a5735a9
4 changed files with 22 additions and 7 deletions
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2
lib/librte_eal/common/include/arch/arm/rte_memcpy_64.h
View file

@ -89,7 +89,7 @@ n <= (size_t)RTE_ARM64_MEMCPY_UNALIGNED_THRESHOLD)
**************************************/
#if defined(RTE_TOOLCHAIN_GCC) && !defined(RTE_ARM64_MEMCPY_SKIP_GCC_VER_CHECK)
#if RTE_CC_IS_GNU && !defined RTE_ARM64_MEMCPY_SKIP_GCC_VER_CHECK
#if (GCC_VERSION < 50400)
#warning "The GCC version is quite old, which may result in sub-optimal \
performance of the compiled code. It is suggested that at least GCC 5.4.0 \

4
lib/librte_eal/common/include/arch/arm/rte_vect.h
View file

@ -62,7 +62,7 @@ vaddvq_u16(uint16x8_t a)
#endif
#if defined(RTE_TOOLCHAIN_GCC) && (GCC_VERSION < 70000)
#if RTE_CC_IS_GNU && (GCC_VERSION < 70000)
static inline uint32x4_t
vcopyq_laneq_u32(uint32x4_t a, const int lane_a,
uint32x4_t b, const int lane_b)
@ -72,7 +72,7 @@ vcopyq_laneq_u32(uint32x4_t a, const int lane_a,
#endif
#if defined(RTE_ARCH_ARM64)
#if defined(RTE_TOOLCHAIN_GCC) && (GCC_VERSION < 70000)
#if RTE_CC_IS_GNU && (GCC_VERSION < 70000)
#if (GCC_VERSION < 40900)
typedef uint64_t poly64_t;

19
lib/librte_eal/common/include/rte_common.h
View file

@ -42,8 +42,23 @@ extern "C" {
#define RTE_STD_C11
#endif
/** Define GCC_VERSION **/
#ifdef RTE_TOOLCHAIN_GCC
/*
* RTE_TOOLCHAIN_GCC is defined if the target is built with GCC,
* while a host application (like pmdinfogen) may have another compiler.
* RTE_CC_IS_GNU is true if the file is compiled with GCC,
* no matter it is a target or host application.
*/
#define RTE_CC_IS_GNU 0
#if defined __clang__
#define RTE_CC_CLANG
#elif defined __INTEL_COMPILER
#define RTE_CC_ICC
#elif defined __GNUC__
#define RTE_CC_GCC
#undef RTE_CC_IS_GNU
#define RTE_CC_IS_GNU 1
#endif
#if RTE_CC_IS_GNU
#define GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + \
__GNUC_PATCHLEVEL__)
#endif

4
lib/librte_table/rte_lru_x86.h
View file

@ -19,7 +19,7 @@ extern "C" {
#if RTE_TABLE_HASH_LRU_STRATEGY == 2
#if defined(RTE_TOOLCHAIN_GCC) && (GCC_VERSION > 40306)
#if RTE_CC_IS_GNU && (GCC_VERSION > 40306)
#include <x86intrin.h>
#else
#include <emmintrin.h>
@ -63,7 +63,7 @@ do { \
#elif RTE_TABLE_HASH_LRU_STRATEGY == 3
#if defined(RTE_TOOLCHAIN_GCC) && (GCC_VERSION > 40306)
#if RTE_CC_IS_GNU && (GCC_VERSION > 40306)
#include <x86intrin.h>
#else
#include <emmintrin.h>