gc does not compile under clang-2.9 #2076
Description
by davecheney:
What steps will reproduce the problem?
mercury(~/go/src) % export CC=~/devel/build/Release/bin/clang
mercury(~/go/src) % make -C cmd/6g
What is the expected output?
Successful compilation
What do you see instead?
make: Entering directory `/home/dfc/go/src/cmd/6g'
quietgcc -I"/home/dfc/go/include" -ggdb -O2 -c -I. -o pgen.o ../gc/pgen.c
../gc/pgen.c:192:28: error: comparison of unsigned expression < 0 is always false
[-Werror,-Wtautological-compare]
if((w >= MAXWIDTH) || (w < 0))
~ ^ ~
1 error generated.
make: *** [pgen.o] Error 1
make: Leaving directory `/home/dfc/go/src/cmd/6g'
Which compiler are you using (5g, 6g, 8g, gccgo)?
6g, but the same is observed under 8g and probably under 5g because they all include
../gc/pgen.c
Which operating system are you using?
ubuntu 11.10
Which revision are you using? (hg identify)
mercury(~/go/src) % hg identify
ba1bd8be90e2 tip
Please provide any additional information below.