[LLVMdev] Trouble Building llvm-gcc-4.2

[David Greene]

I'm still trying to debug the validator buildbot. 

I'm getting this error when building some variants of llvm-gcc-4.2:

/bin/sh ../../src/gcc/mkconfig.sh bconfig.h
gcc -c   -g -DIN_GCC   -W -Wall -Wwrite-strings -Wstrict-prototypes 
-Wmissing-prototypes -pedantic -Wno-long-long -Wno-variadic-macros 
-Wno-overlength-strings -Wold-style-definition -Wmissing-format-attribute 
-fno-common   -DHAVE_CONFIG_H -DGENERATOR_FILE -I. -Ibuild -I../../src/gcc 
-I../../src/gcc/build -I../../src/gcc/../include 
-I../../src/gcc/../libcpp/include  -I../../src/gcc/../libdecnumber 
-I../libdecnumber 
-I/tmp/ptmp/dag/buildbot/slaves/llvm-validate/llvm-validate-release-egypt-linux/build/llvm-initial/obj/include 
-I/tmp/ptmp/dag/buildbot/slaves/llvm-validate/llvm-validate-release-egypt-linux/build/llvm-initial/src/include 
-DENABLE_LLVM 
-I/tmp/ptmp/dag/buildbot/slaves/llvm-validate/llvm-validate-release-egypt-linux/build/llvm-initial/obj/../src/include  
-DNDEBUG  -D_GNU_SOURCE -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS   -o 
build/errors.o ../../src/gcc/errors.c
build/genmodes -h > tmp-modes.h
/bin/sh: line 1: build/genmodes: No such file or directory
make[4]: *** [s-modes-h] Error 127

Google turned up a gcc bug in which a maintainer explained that doing 
a ./configure in the source directory could cause this.  Except the buildbot 
doesn't do that.

Anyone seen this before and have any idea how to fix it?

                                                  -Dave