On Fri, Jan 19, 2024 at 4:20 AM Palmer Dabbelt <palmer@xxxxxxxxxxxx> wrote: > > From: Palmer Dabbelt <palmer@xxxxxxxxxxxx> > > I was just trying to track down a build bug with an old toolchain. > Turns out Ubuntu installs old GCCs as something like > riscv64-linux-gnu-gcc-10, which is a bit clunky to point the build at > without a way to append a suffix to CC. You can do: make CROSS_COMPILE=riscv64-linux-gnu- CC=riscv64-linux-gnu-gcc-10 > > There's already LLVM_SUFFIX, but nothing similar for GCC. I've split > out the host and target suffixes as users probably don't have the same > version of for both (unlike LLVM, where the cross compiler is likely to > support the host target). > > Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx> > --- > I've only given this some very minimal testing, but it at least works > for my simple use case. > --- > Makefile | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/Makefile b/Makefile > index f1b2fd977275..36ce336cda3b 100644 > --- a/Makefile > +++ b/Makefile > @@ -433,8 +433,8 @@ endif > HOSTCC = $(LLVM_PREFIX)clang$(LLVM_SUFFIX) > HOSTCXX = $(LLVM_PREFIX)clang++$(LLVM_SUFFIX) > else > -HOSTCC = gcc > -HOSTCXX = g++ > +HOSTCC = gcc$(HOST_GCC_SUFFIX) > +HOSTCXX = g++$(HOST_GCC_SUFFIX) > endif > HOSTRUSTC = rustc > HOSTPKG_CONFIG = pkg-config > @@ -480,7 +480,7 @@ OBJDUMP = $(LLVM_PREFIX)llvm-objdump$(LLVM_SUFFIX) > READELF = $(LLVM_PREFIX)llvm-readelf$(LLVM_SUFFIX) > STRIP = $(LLVM_PREFIX)llvm-strip$(LLVM_SUFFIX) > else > -CC = $(CROSS_COMPILE)gcc > +CC = $(CROSS_COMPILE)gcc$(CROSS_GCC_SUFFIX) > LD = $(CROSS_COMPILE)ld > AR = $(CROSS_COMPILE)ar > NM = $(CROSS_COMPILE)nm > -- > 2.43.0 > > -- Best Regards Masahiro Yamada
