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lib: utils: Drop dependency on libgcc by importing part of FreeBSD's libquad

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We only need libgcc for 64-bit division on RV32. Whilst GCC toolchains
bundle libgcc, Clang toolchains tend not to ship libclang_rt.builtins
given every compiler is a cross-compiler for every target and so you
would need a silly number of builds of it, with only the native library
available; only vendor-provided Clang toolchains specifically for bare
metal cross-compiling are likely to provide it.

Thus, import part of FreeBSD's implementation of the division support
functions needed and stop linking against libgcc.

Signed-off-by: Jessica Clarke <jrtc27@jrtc27.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Tested-by: Anup Patel <anup.patel@wdc.com>
This commit is contained in:
Jessica Clarke
2021-07-11 03:28:24 +01:00
committed by Anup Patel
parent 2942777425
commit 17729d44da
11 changed files with 683 additions and 1 deletions
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2
Makefile
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@@ -279,7 +279,7 @@ ASFLAGS += $(firmware-asflags-y)
ARFLAGS = rcs
ELFFLAGS += $(USE_LD_FLAG)
ELFFLAGS += -Wl,--build-id=none -Wl,-N -static-libgcc -lgcc
ELFFLAGS += -Wl,--build-id=none -Wl,-N
ELFFLAGS += $(platform-ldflags-y)
ELFFLAGS += $(firmware-ldflags-y)