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package/glibc: force -fno-lto

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glibc requires compilation barriers between files, and will fail with
LTO enabled.

So force LTO off by appending -fno-lto to the flags, but only if the GCC
version is recent enough that an LTO build would be possible.

Signed-off-by: Norbert Lange <nolange79@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
This commit is contained in:
Norbert Lange 2020-10-18 00:17:43 +02:00 committed by Yann E. MORIN
parent f35a4b4ae2
commit b7a00b39bc
1 changed files with 5 additions and 0 deletions
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package/glibc/glibc.mk
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@ -53,6 +53,11 @@ ifeq ($(BR2_ENABLE_DEBUG),y)
GLIBC_EXTRA_CFLAGS += -g
endif
# glibc explicitly requires compile barriers between files
ifeq ($(BR2_TOOLCHAIN_GCC_AT_LEAST_4_7),y)
GLIBC_EXTRA_CFLAGS += -fno-lto
endif
# The stubs.h header is not installed by install-headers, but is
# needed for the gcc build. An empty stubs.h will work, as explained
# in http://gcc.gnu.org/ml/gcc/2002-01/msg00900.html. The same trick