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Makefile.arm: remove -march flags 

The provided -march flags, especially for ARMv5 and ARMv6 may not
necessarily match the needed ones: for ARMv5, it might be armv5,
armv5te, armv5t, etc. If the wrong one is used, the incorrect toolchain
sysroot can be used in a multilib toolchain.

Therefore, let the user building OpenBLAS pass the appropriate -march
flag.

The other flags, such as -mfpu=vfp or -mfloat-abi=hard are kept, as they
are actually required for the build to proceed (OpenBLAS uses VFP
instructions, and assume an EABIhf ABI).

[Peter: update for v0.2.20]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
[Retrieved from:
https://git.buildroot.net/buildroot/tree/package/openblas/0001-Makefile.arm-remove-march-flags.patch]
Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
This commit is contained in:
Fabrice Fontaine 2019-05-05 18:37:28 +02:00
parent 6a8b4269b5
commit 5a9cce2bf6
1 changed files with 4 additions and 9 deletions
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13
Makefile.arm
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@ -1,7 +1,7 @@
ifeq ($(CORE), $(filter $(CORE),ARMV7 CORTEXA9 CORTEXA15))
ifeq ($(OSNAME), Android)
CCOMMON_OPT += -mfpu=neon -march=armv7-a
FCOMMON_OPT += -mfpu=neon -march=armv7-a
CCOMMON_OPT += -mfpu=neon
FCOMMON_OPT += -mfpu=neon
else
CCOMMON_OPT += -mfpu=vfpv3 -march=armv7-a
FCOMMON_OPT += -mfpu=vfpv3 -march=armv7-a
@ -9,11 +9,6 @@ endif
endif
ifeq ($(CORE), ARMV6)
CCOMMON_OPT += -mfpu=vfp -march=armv6
FCOMMON_OPT += -mfpu=vfp -march=armv6
endif
ifeq ($(CORE), ARMV5)
CCOMMON_OPT += -march=armv5
FCOMMON_OPT += -march=armv5
CCOMMON_OPT += -mfpu=vfp
FCOMMON_OPT += -mfpu=vfp
endif