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package/supertux: fix bug when compiling with PPC altivec vectorization

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>From [1]:
Acording to a bug report in GCC [2]:
"You need to use -std=g++11 or undefine bool after the include of altivec.h
as context sensitive keywords is not part of the C++11 standard".

So use gnu++11 instead of c++11 only for altivec system.

This allow to revert [3] and keep Altivec vectorization.

[1] 0024465d8a
[2] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58241#c3
[3] d2903aaf13

Signed-off-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Romain Naour 2017-03-25 22:59:00 +01:00 committed by Thomas Petazzoni
parent 14defc5d6f
commit 9b4f1b73e7
1 changed files with 21 additions and 0 deletions
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21
package/supertux/supertux.mk
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@ -46,4 +46,25 @@ endef
SUPERTUX_POST_PATCH_HOOKS += SUPERTUX_REMOVE_PEDANTIC
endif
# From https://bugs.debian.org/cgi-bin/bugreport.cgi/?bug=770670
# "The problem lies within SDL_cpuinfo.h. It includes altivec.h, which by
# definition provides an unconditional vector, pixel and bool define in
# standard-c++ mode. In GNU-c++ mode this names are only defined
# context-sensitive by cpp. SDL_cpuinfo.h is included by SDL.h.
# Including altivec.h makes arbitrary code break."
#
# Acording to a bug report in GCC [1]:
# "You need to use -std=g++11 or undefine bool after the include of altivec.h
# as context sensitive keywords is not part of the C++11 standard".
# So use gnu++11 instead of c++11 only for altivec system.
# [1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=58241#c3
ifeq ($(BR2_POWERPC_CPU_HAS_ALTIVEC),y)
define SUPERTUX_FIX_ALTIVEC_ISSUE
$(SED) 's%std=c++0x%std=gnu++0x%' $(@D)/CMakeLists.txt
$(SED) 's%std=c++11%std=gnu++11%' $(@D)/CMakeLists.txt
$(SED) 's%std=c++0x%std=gnu++0x%' $(@D)/external/tinygettext/CMakeLists.txt
endef
SUPERTUX_POST_PATCH_HOOKS += SUPERTUX_FIX_ALTIVEC_ISSUE
endif
$(eval $(cmake-package))