By default, rustc passes -nodefaultlibs to the linker. In some cases,
this can cause compiler builtins (e.g. __cpu_model, used by
__builtin_cpu_supports) not to be linked in:
= note:
/nix/store/s2cjhni3s6shh0n35ay1hpj8d85k44qk-x86_64-unknown-linux-musl-binutils-2.43.1/bin/x86_64-unknown-linux-musl-ld:
./libbcachefs.a(tools-util.o): in function `resolve_crc32c':
/build/source/c_src/tools-util.c:457:(.text+0x1023): undefined
reference to `__cpu_model'
collect2: error: ld returned 1 exit status
I saw this with static musl GCC builds, and others have reported it with
Clang.
Link: https://github.com/koverstreet/bcachefs-tools/issues/300
Signed-off-by: Alyssa Ross <[email protected]>
---
Makefile | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/Makefile b/Makefile
index c0261c35..c14db58d 100644
--- a/Makefile
+++ b/Makefile
@@ -73,12 +73,13 @@ CFLAGS+=$(call cc-disable-warning, zero-length-array)
CFLAGS+=$(call cc-disable-warning, shift-overflow)
CFLAGS+=$(call cc-disable-warning, enum-conversion)
CFLAGS+=$(call cc-disable-warning, gnu-variable-sized-type-not-at-end)
+export RUSTFLAGS=-C default-linker-libraries
PKGCONFIG_LIBS="blkid uuid liburcu libsodium zlib liblz4 libzstd libudev
libkeyutils"
ifdef BCACHEFS_FUSE
PKGCONFIG_LIBS+="fuse3 >= 3.7"
CFLAGS+=-DBCACHEFS_FUSE
- export RUSTFLAGS=--cfg fuse
+ RUSTFLAGS+=--cfg fuse
endif
PKGCONFIG_CFLAGS:=$(shell $(PKG_CONFIG) --cflags $(PKGCONFIG_LIBS))
base-commit: b34d1341919c4edd3251c7f69c2588acd1196d71
--
2.45.2
