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gcc: support grahite only for GCC 5 or above

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GCC 4.9.x requires an old version of ISL to support graphite, and this
old version of ISL is not sufficient to support graphite in modern GCC
versions.

Since GCC 4.9.x is getting older, and to keep things simple, we stop
supporting graphite on old GCC < 5.x. This way, we will be able to
bump ISL to a version that is suitable for modern GCC versions.

In addition, this allows to drop the dependency on cloog, which was
only needed for GCC 4.9.

Signed-off-by: Andrey Yurovsky <yurovsky@gmail.com>
[Thomas: rework commit log.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Andrey Yurovsky 2017-08-01 16:43:00 -07:00 committed by Thomas Petazzoni
parent d64d121696
commit d16b6bf9b9
2 changed files with 7 additions and 6 deletions
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4
package/gcc/Config.in.host
View File

@ -159,6 +159,10 @@ config BR2_GCC_ENABLE_LIBMUDFLAP
config BR2_GCC_ENABLE_GRAPHITE
bool "Enable graphite support"
depends on BR2_TOOLCHAIN_GCC_AT_LEAST_5
help
This option enables the graphite optimizations in the
compiler.
comment "graphite support needs gcc >= 5.x"
depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_5

9
package/gcc/gcc.mk
View File

@ -173,15 +173,12 @@ else
HOST_GCC_COMMON_CONF_OPTS += --enable-threads
endif
# gcc 5 doesn't need cloog any more, see
# https://gcc.gnu.org/gcc-5/changes.html and we don't support graphite
# on GCC 4.9.x, so only isl is needed.
ifeq ($(BR2_GCC_ENABLE_GRAPHITE),y)
HOST_GCC_COMMON_DEPENDENCIES += host-isl
HOST_GCC_COMMON_CONF_OPTS += --with-isl=$(HOST_DIR)
# gcc 5 doesn't need cloog any more, see
# https://gcc.gnu.org/gcc-5/changes.html
ifeq ($(BR2_TOOLCHAIN_GCC_AT_LEAST_5),)
HOST_GCC_COMMON_DEPENDENCIES += host-cloog
HOST_GCC_COMMON_CONF_OPTS += --with-cloog=$(HOST_DIR)
endif
else
HOST_GCC_COMMON_CONF_OPTS += --without-isl --without-cloog
endif