Aren/haiku
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

kernel: Disable rtl-stv1 optimization on GCC 7.

Browse Source 
See inline comment and accompanying ticket.
This commit is contained in:
Augustin Cavalier 2018-05-21 20:52:11 -04:00
parent c5a6b06396
commit 3acaf25e8f
1 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/system/kernel/Jamfile
View File

@ -75,6 +75,20 @@ KernelMergeObject kernel_core.o :
: $(TARGET_KERNEL_PIC_CCFLAGS)
;
if $(HAIKU_GCC_VERSION_$(HAIKU_ARCH)[1]) >= 7 {
# With the rtl-stv1 pass on these files, the kernel panics towards the end
# of the boot process with a "General Protection Exception", see
# https://dev.haiku-os.org/ticket/14160. The pass itself vectorizes
# a significant number of otherwise-scalar operations, which may be why
# disabling it fixes the problem.
#
# At time of writing, GCC does not seem to have a way to disable
# vectorization as a result of optimization without disabling
# FPU usage altogether, which of course is not what we want and
# breaks when using libstdc++'s headers anyway.
ObjectC++Flags commpage.o signal.o thread.o : -fdisable-rtl-stv1 ;
}
# Generate the header defining macros for C++ structure sizes.
local kernelC++StructSizesHeader = [ FGristFiles kernel_c++_struct_sizes.h ] ;
TARGET_HDRS_$(TARGET_PACKAGING_ARCH) on $(kernelC++StructSizesHeader)